FNUS56 KPDT 181921 FWFPDT Fire Weather Planning Forecast for NE Oregon and SE Washington National Weather Service Pendleton OR 1221 PM PDT Mon May 18 2026 .DISCUSSION...Scattered showers and a slight chance (15 percent) of thunderstorms across Wallowa County today; very low chances (10 percent or less) of rain showers and thunder elsewhere. Warming and mostly dry conditions will persist Tuesday through the week. Diurnally driven, breezy westerly winds through the Cascade gaps today and Tuesday, followed by medium confidence (60 percent) in a wind reversal to mostly light northeasterly (offshore) late Wednesday and Thursday. ***Winds are 20 foot 10 minute averages *** ***CWR: Chance of wetting rain 0.10 or greater *** ***Ventilation Index is derived from transport wind multiplied by the mixing height in 100's of ft. Categories are a generalized indicator and users are encourage to develop criteria that are suitable and representative of dispersion conditions in their local area of interest. Categories: low (< 200), moderate (200-500), high (500-700), and very high (> 700). -Note: Max transport winds may not occur at the same time as max mixing height. *** WAZ695-191130- East Washington South Central Cascade Mountains- 1221 PM PDT Mon May 18 2026 .TONIGHT... * Sky/weather.........Partly cloudy. * Min temperature.....37-42...except 32-38 ridges. * Max humidity........75-90 percent. * Humidity recovery...Excellent. * 20-foot winds....... * Valleys/lwr slopes...West winds 5 to 11 mph. * Ridges/upr slopes....West winds 5 to 11 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....Northwest around 15 mph. * Ventilation Index...Moderate (217-387) decreasing to low (43-65) after midnight. .TUESDAY... * Sky/weather.........Partly cloudy. * Max temperature.....57-65...except 48-57 ridges. * Min humidity........45-60 percent. * 20-foot winds....... * Valleys/lwr slopes...West winds 4 to 10 mph. * Ridges/upr slopes....West winds 4 to 10 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......6000 ft agl. * Transport winds.....West 10 to 15 mph. * Ventilation Index...Low (108-176) increasing to moderate to high (352-620) in the afternoon. .TUESDAY NIGHT... * Sky/weather.........Mostly cloudy. * Min temperature.....37-43. * Max humidity........74-89 percent. * Humidity recovery...Excellent. * 20-foot winds....... * Valleys/lwr slopes...Northwest winds 6 to 12 mph. * Ridges/upr slopes....Northwest winds 6 to 12 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....Northwest around 15 mph. * Ventilation Index...Moderate (208-350) decreasing to low (50-72) after midnight. .WEDNESDAY... * Sky/weather.........Partly cloudy then becoming mostly sunny. * Max temperature.....63-71...except 54-62 ridges. * Min humidity........36-51 percent. * 20-foot winds....... * Valleys/lwr slopes...Northwest winds 2 to 7 mph. * Ridges/upr slopes....Northwest winds 2 to 7 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......7000 ft agl. * Transport winds.....North around 10 mph. * Ventilation Index...Low (66-108) increasing to moderate (233-435) in the afternoon. .Forecast days 3 through 7...... .THURSDAY...Partly cloudy. Lows 39 to 45. Highs 60 to 72. Northwest winds 2 to 7 mph. .FRIDAY...Mostly clear. Lows 41 to 47. Highs 61 to 74. West winds 2 to 7 mph. .SATURDAY...Partly cloudy. Lows 42 to 49. Highs 61 to 73. West winds 4 to 10 mph. .SUNDAY...Partly cloudy. Lows 40 to 47. Highs55 to 68. West winds 5 to 11 mph. .MEMORIAL DAY...Partly cloudy with a slight chance of rain and snow showers. Lows 37 to 44. Highs 50 to 62. West winds 7 to 13 mph. $$ WAZ690-191130- Kittitas Valley- 1221 PM PDT Mon May 18 2026 .TONIGHT... * Sky/weather.........Partly cloudy. * Min temperature.....41-46. * Max humidity........64-79 percent. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...Northwest winds 9 to 15 mph. * Ridges/upr slopes....Northwest winds 9 to 15 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....Northwest 15 to 20 mph. * Ventilation Index...Moderate to high (393-613) decreasing to low (43-73) after midnight. .TUESDAY... * Sky/weather.........Partly cloudy. * Max temperature.....66-74...except 57-66 ridges. * Min humidity........32-42 percent. * 20-foot winds....... * Valleys/lwr slopes...Northwest winds 6 to 12 mph. * Ridges/upr slopes....Northwest winds 6 to 12 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......8000 ft agl. * Transport winds.....Northwest 10 to 15 mph. * Ventilation Index...Low to moderate (114-202) increasing to high to very high (565-917) in the afternoon. .TUESDAY NIGHT... * Sky/weather.........Mostly cloudy. * Min temperature.....44-49. * Max humidity........64-79 percent. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...Northwest winds 10 to 16 mph with gusts up to 30 mph. * Ridges/upr slopes....Northwest winds 11 to 17 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....Northwest 15 to 20 mph. * Ventilation Index...Moderate (353-453) decreasing to low (47-79) after midnight. .WEDNESDAY... * Sky/weather.........Partly cloudy then becoming mostly sunny. * Max temperature.....70-77...except 61-70 ridges. * Min humidity........26-36 percent. * 20-foot winds....... * Valleys/lwr slopes...Northwest winds 4 to 9 mph in the morning becoming upslope less than 5 mph. * Ridges/upr slopes....Northwest winds 8 to 14 mph becoming north 2 to 5 mph in the afternoon. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......8000 ft agl. * Transport winds.....North around 10 mph. * Ventilation Index...Low (72-114) increasing to moderate (378-466) in the afternoon. .Forecast days 3 through 7...... .THURSDAY...Partly cloudy. Lows 46 to 51. Highs 70 to 79. North winds 3 to 8 mph. .FRIDAY...Mostly clear. Lows 48 to 53. Highs 73 to 82. West winds 2 to 7 mph. .SATURDAY...Partly cloudy. Lows 50 to 55. Highs 73 to 82. Northwest winds 6 to 12 mph. .SUNDAY...Partly cloudy. Lows 48 to 53. Highs 69 to 77. West winds 9 to 15 mph. .MEMORIAL DAY...Partly cloudy. Lows 45 to 50. Highs 64 to 72. West winds 9 to 15 mph. $$ WAZ694-191130- Yakama Alpine District- 1221 PM PDT Mon May 18 2026 .TONIGHT... * Sky/weather.........Partly cloudy. * Min temperature.....35-42. * Max humidity........73-88 percent. * Humidity recovery...Excellent...except Good ridges. * 20-foot winds....... * Valleys/lwr slopes...West winds 3 to 8 mph. * Ridges/upr slopes....West winds 3 to 8 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....Northwest around 10 mph. * Ventilation Index...Moderate (201-287) decreasing to low (25-41) after midnight. .TUESDAY... * Sky/weather.........Partly cloudy. * Max temperature.....63-70...except 52-64 ridges. * Min humidity........34-47 percent...except 43-58 percent ridges. * 20-foot winds.......* Valleys/lwr slopes...West winds 3 to 8 mph. * Ridges/upr slopes....West winds 3 to 8 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......7000 ft agl. * Transport winds.....West 5 to 10 mph. * Ventilation Index...Low (58-98) increasing to moderate to high (339-501) in the afternoon. .TUESDAY NIGHT... * Sky/weather.........Mostly cloudy. * Min temperature.....38-45. * Max humidity........75-90 percent. * Humidity recovery...Excellent. * 20-foot winds....... * Valleys/lwr slopes...West winds 3 to 8 mph. * Ridges/upr slopes....Northwest winds 3 to 8 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....Northwest around 10 mph. * Ventilation Index...Low to moderate (173-237) decreasing to low (25-50) after midnight. .WEDNESDAY... * Sky/weather.........Partly cloudy then becoming mostly sunny. * Max temperature.....67-73...except 57-68 ridges. * Min humidity........32-47 percent. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph becoming south 1 to 5 mph in the afternoon. * Ridges/upr slopes....light less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......6500 ft agl. * Transport winds.....North 5 to 10 mph. * Ventilation Index...Low (35-61) increasing to moderate (229-407) in the afternoon. .Forecast days 3 through 7...... .THURSDAY...Partly cloudy. Lows 42 to 48. Highs 64 to 77. North winds 1 to 6 mph. .FRIDAY...Mostly clear. Lows 43 to 50. Highs 66 to 78. West winds 1 to 6 mph. .SATURDAY...Partly cloudy. Lows 44 to 51. Highs 65 to 77. West winds 3 to 8 mph. .SUNDAY...Partly cloudy. Lows 42 to 49. Highs 60 to 72. West winds 4 to 10 mph. .MEMORIAL DAY...Partly cloudy. Lows 39 to 46. Highs 54 to 67. West winds 5 to 11 mph. $$ ORZ691-WAZ691-191130- Lower Columbia Basin of Oregon-Lower Columbia Basin of Washington- 1221 PM PDT Mon May 18 2026 .TONIGHT... * Sky/weather.........Partly cloudy. * Min temperature.....41-46. * Max humidity........67-80 percent. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...West winds 5 to 11 mph. * Ridges/upr slopes....West winds 5 to 11 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....West around 10 mph. * Ventilation Index...Moderate (222-486) decreasing to low (26-46) after midnight. .TUESDAY... * Sky/weather.........Partly cloudy. * Max temperature.....68-76...except 64-70 ridges. * Min humidity........28-36 percent. * 20-foot winds....... * Valleys/lwr slopes...West winds 4 to 9 mph. * Ridges/upr slopes....West winds 4 to 10 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......9000 ft agl. * Transport winds.....West around 10 mph. * Ventilation Index...Low (79-153) increasing to moderate to very high (491-737) in the afternoon. .TUESDAY NIGHT... * Sky/weather.........Mostly cloudy. * Min temperature.....44-49. * Max humidity........70-83 percent. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...West winds 5 to 11 mph. * Ridges/upr slopes....West winds 5 to 11 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....West 10 to 15 mph. * Ventilation Index...Moderate (233-387) decreasing to low (26-50) after midnight. .WEDNESDAY... * Sky/weather.........Partly cloudy then becoming mostly sunny. * Max temperature.....70-78...except 66-73 ridges. * Min humidity........25-35 percent. * 20-foot winds....... * Valleys/lwr slopes...West winds 2 to 7 mph. * Ridges/upr slopes....Northwest winds 2 to 7 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......8000 ft agl. * Transport winds.....Northwest around 10 mph. * Ventilation Index...Low (47-99) increasing to moderate (278-402) in the afternoon. .Forecast days 3 through 7...... .THURSDAY...Mostly clear. Lows 46 to 51. Highs 74 to 81. North winds 2 to 7 mph. .FRIDAY...Mostly clear. Lows 48 to 53. Highs 76 to 84. Southwest winds 2 to 7 mph. .SATURDAY...Partly cloudy. Lows 49 to 54. Highs 77 to 84. West winds 4 to 9 mph. .SUNDAY...Partly cloudy. Lows 49 to 54. Highs 73 to 81. West winds 7 to 13 mph. .MEMORIAL DAY...Partly cloudy. Lows 46 to 51. Highs 67 to 75. West winds 8 to 14 mph. $$ ORZ692-WAZ692-191130- Northern Blue Mountains of Oregon-Blue Mountains of Washington- 1221 PM PDT Mon May 18 2026 .TONIGHT... * Sky/weather.........Mostly clear. * Min temperature.....34-42. * Max humidity........69-84 percent. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...Drainage winds less than 5 mph becoming southwest up to 5 mph after midnight. * Ridges/upr slopes....Northwest winds 1 to 5 mph in the evening becoming light winds less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....West 5 to 10 mph. * Ventilation Index...Low (68-184) decreasing to low (26-36) after midnight. .TUESDAY... * Sky/weather.........Partly cloudy. * Max temperature.....59-68...except 53-59 ridges. * Min humidity........37-50 percent. * 20-foot winds....... * Valleys/lwr slopes...West winds 1 to 6 mph. * Ridges/upr slopes....West winds 1 to 6 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......7500 ft agl. * Transport winds.....West around 10 mph. * Ventilation Index...Low (91-139) increasing to moderate to high (468-588) in the afternoon. .TUESDAY NIGHT... * Sky/weather.........Partly cloudy. * Min temperature.....38-46. * Max humidity........71-86 percent. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...West winds up to 5 mph in the evening becoming drainage winds less than 5 mph. * Ridges/upr slopes....West winds 1 to 6 mph in the evening becoming light winds less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....West around 10 mph. * Ventilation Index...Low to moderate (177-259) decreasing to low (31-41) after midnight. .WEDNESDAY... * Sky/weather.........Partly cloudy. * Max temperature.....61-70...except 55-60 ridges. * Min humidity........39-52 percent. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 1 to 5 mph in the afternoon. * Ridges/upr slopes....light less than 5 mph becoming northwest 2 to 5 mph in the afternoon. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......7000 ft agl. * Transport winds.....West 5 to 10 mph. * Ventilation Index...Low (48-80) increasing to moderate (321-423) in the afternoon. .Forecast days 3 through 7...... .THURSDAY...Mostly clear. Lows 39 to 46. Highs 61 to 71. North winds 1 to 6 mph. .FRIDAY...Mostly clear. Lows 41 to 48. Highs 64 to 75. South winds 1 to 6 mph. .SATURDAY...Partly cloudy. Lows 43 to 50. Highs 67 to 77. Southwest winds 1 to 6 mph. .SUNDAY...Partly cloudy. Lows 44 to 52. Highs 66 to 75. Southwest winds 2 to 7 mph. .MEMORIAL DAY...Partly cloudy with a slight chance of showers. Lows 42 to 49. Highs 58 to 67. West winds 3 to 8 mph. $$ ORZ693-WAZ693-191130- Canyon Grasslands of Wallowa County- Southeast Washington Grande Ronde Valley- 1221 PM PDT Mon May 18 2026 .TONIGHT... * Sky/weather.........Partly cloudy. * Min temperature.....32-40. * Max humidity........68-82 percent. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...Drainage winds less than 5 mph. * Ridges/upr slopes....Southwest winds up to 5 mph. * CWR.................0 percent. * Chc of lightning....10 percent (very low chance). * Mixing height.......500 ft agl. * Transport winds.....Northwest around 5 mph shifting to the southwest after midnight. * Ventilation Index...Low (74-174) decreasing to low (25-26) after midnight. .TUESDAY... * Sky/weather.........Mostly sunny then becoming partly cloudy. * Max temperature.....60-68...except 54-61 ridges. * Min humidity........30-39 percent. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph becoming west 1 to 5 mph in the afternoon. * Ridges/upr slopes....light less than 5 mph becoming northwest 2 to 6 mph in the afternoon. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......8000 ft agl. * Transport winds.....West 5 to 10 mph. * Ventilation Index...Low (68-110) increasing to moderate to high (487-613) in the afternoon. .TUESDAY NIGHT... * Sky/weather.........Partly cloudy. * Min temperature.....36-44. * Max humidity........65-80 percent...except 62-69 percent ridges. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...Drainage winds less than 5 mph. * Ridges/upr slopes....West winds 1 to 6 mph in the evening becoming light winds less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....West 5 to 10 mph. * Ventilation Index...Low to moderate (146-248) decreasing to low (25-27) after midnight. .WEDNESDAY... * Sky/weather.........Partly cloudy. * Max temperature.....61-69...except 56-62 ridges. * Min humidity........35-43 percent. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 1 to 6 mph in the afternoon. * Ridges/upr slopes....light less than 5 mph becoming north 2 to 7 mph in the afternoon. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......7500 ft agl. * Transport winds.....Northwest 5 to 10 mph. * Ventilation Index...Low (32-46) increasing to moderate to high (398-526) in the afternoon. .Forecast days 3 through 7...... .THURSDAY...Mostly clear. Lows 37 to 44. Highs 63 to 72. North winds 3 to 8 mph. .FRIDAY...Partly cloudy. Lows 39 to 47. Highs 67 to 76. Northwest winds 1 to 6 mph. .SATURDAY...Mostly clear. Lows 41 to 49. Highs 71 to 80. Southwest winds 1 to 6 mph. .SUNDAY...Mostly clear. Lows 43 to 51. Highs 71 to 80. West winds 2 to 7 mph. .MEMORIAL DAY...Partly cloudy with a slight chance of showers. Lows 41 to 50. Highs 62 to 71. West winds 3 to 8 mph. $$ ORZ701-191130- Eastern Columbia River Gorge of Oregon- 1221 PM PDT Mon May 18 2026 .TONIGHT... * Sky/weather.........Mostly clear. * Min temperature.....39-44. * Max humidity........71-85 percent. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...West winds 8 to 14 mph with gusts up to 25 mph decreasing to 2 to 7 mph after midnight. In the eastern Columbia River Gorge, west winds 6 to 12 mph, Gusts to 25 mph in the evening. * Ridges/upr slopes....West winds 6 to 12 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....West 10 to 15 mph. * Ventilation Index...Moderate (275-411) decreasing to low (32-48) after midnight. .TUESDAY... * Sky/weather.........Partly cloudy. * Max temperature.....67-72...except 62-68 ridges. * Min humidity........34-45 percent. * 20-foot winds....... * Valleys/lwr slopes...West winds 2 to 7 mph shifting to the northwest 7 to 13 mph with gusts up to 25 mph in the afternoon. In the eastern Columbia River Gorge, west winds 3 to 8 mph increasing to 9 to 15 mph with gusts up to 30 mph in the afternoon. * Ridges/upr slopes....West winds 4 to 9 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......6500 ft agl. * Transport winds.....West 10 to 15 mph. * Ventilation Index...Low (70-120) increasing to moderate to high (466-664) in the afternoon. .TUESDAY NIGHT... * Sky/weather.........Mostly cloudy. * Min temperature.....42-48. * Max humidity........77-90 percent. * Humidity recovery...Excellent...except Good ridges. * 20-foot winds....... * Valleys/lwr slopes...West winds 9 to 15 mph decreasing to 3 to 8 mph after midnight. In the eastern Columbia River Gorge, west winds 10 to 16 mph with gusts up to 30 mph decreasing to 4 to 9 mph after midnight. * Ridges/upr slopes....West winds 6 to 12 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....West 10 to 15 mph. * Ventilation Index...Moderate (221-331) decreasing to low (32-50) after midnight. .WEDNESDAY... * Sky/weather.........Partly cloudy then becoming mostly sunny. * Max temperature.....71-76...except 66-71 ridges. * Min humidity........32-41 percent. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph becoming north 2 to 6 mph in the afternoon. In the eastern Columbia River Gorge, west winds 2 to 6 mph. * Ridges/upr slopes....Northwest winds 1 to 6 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......6000 ft agl. * Transport winds.....Northwest 5 to 10 mph. * Ventilation Index...Low (46-92) increasing to moderate (285-337) in the afternoon. .Forecast days 3 through 7...... .THURSDAY...Partly cloudy. Lows 45 to 50. Highs 75 to 80. Northwest winds 1 to 6 mph. .FRIDAY...Mostly clear. Lows 47 to 52. Highs 76 to 81. Northwest winds 1 to 6 mph. .SATURDAY...Mostly clear. Lows 47 to 52. Highs 75 to 80. West winds 4 to 9 mph. .SUNDAY...Partly cloudy. Lows 46 to 51. Highs 71 to 76. West winds 5 to 11 mph. .MEMORIAL DAY...Partly cloudy with a slight chance of showers. Lows 44 to 49. Highs 65 to 70. West winds 7 to 13 mph. $$ ORZ702-191130- East Slopes of the Mt. Hood National Forest- 1221 PM PDT Mon May 18 2026 .TONIGHT... * Sky/weather.........Mostly clear. * Min temperature.....33-40. * Max humidity........70-85 percent. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...West winds 2 to 7 mph in the evening becoming drainage winds less than 5 mph. * Ridges/upr slopes....West winds 2 to 7 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....West 10 to 15 mph. * Ventilation Index...Moderate (211-275) decreasing to low (37-47) after midnight. .TUESDAY... * Sky/weather.........Partly cloudy. * Max temperature.....62-70...except 55-65 ridges. * Min humidity........36-51 percent. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph becoming west 1 to 5 mph in the afternoon. * Ridges/upr slopes....light less than 5 mph becoming west 1 to 6 mph in the afternoon. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......6500 ft agl.* Transport winds.....West around 10 mph. * Ventilation Index...Low (75-111) increasing to moderate (341-487) in the afternoon. .TUESDAY NIGHT... * Sky/weather.........Mostly cloudy. * Min temperature.....37-44. * Max humidity........78-93 percent. * Humidity recovery...Excellent. * 20-foot winds....... * Valleys/lwr slopes...West winds 2 to 7 mph in the evening becoming drainage winds less than 5 mph. * Ridges/upr slopes....West winds 2 to 7 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....West 10 to 15 mph. * Ventilation Index...Low to moderate (188-248) decreasing to low (41-63) after midnight. .WEDNESDAY... * Sky/weather.........Mostly cloudy then becoming mostly sunny. * Max temperature.....67-73...except 60-68 ridges. * Min humidity........34-48 percent. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph. * Ridges/upr slopes....light less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......5500 ft agl. * Transport winds.....North around 10 mph. * Ventilation Index...Low (59-79) increasing to moderate (270-342) in the afternoon. .Forecast days 3 through 7...... .THURSDAY...Partly cloudy. Lows 40 to 47. Highs 65 to 76. North winds 1 to 6 mph. .FRIDAY...Mostly clear. Lows 43 to 50. Highs 66 to 78. Northwest winds up to 5 mph. .SATURDAY...Mostly clear. Lows 43 to 50. Highs 66 to 77. West winds 1 to 6 mph. .SUNDAY...Partly cloudy. Lows 41 to 48. Highs 61 to 73. West winds 2 to 7 mph. .MEMORIAL DAY...Partly cloudy with a slight chance of rain and snow showers. Lows 39 to 46. Highs 54 to 66. West winds 3 to 8 mph. $$ ORZ695-191130- Eagle Cap Wilderness- 1221 PM PDT Mon May 18 2026 .TONIGHT... * Sky/weather.........Partly cloudy. * Min temperature.....33-38...except 25-33 ridges. * Max humidity........64-75 percent. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...North winds 2 to 7 mph in the evening becoming drainage winds less than 5 mph. * Ridges/upr slopes....North winds 2 to 7 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....North 5 to 10 mph. * Ventilation Index...Low to moderate (131-225) decreasing to low (25-32) after midnight. .TUESDAY... * Sky/weather.........Mostly sunny then becoming partly cloudy. * Max temperature.....56-66...except 45-57 ridges. * Min humidity........31-46 percent. * 20-foot winds....... * Valleys/lwr slopes...West winds 1 to 6 mph. * Ridges/upr slopes....West winds 2 to 7 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......8000 ft agl. * Transport winds.....West 5 to 10 mph. * Ventilation Index...Low (54-108) increasing to moderate to high (372-528) in the afternoon. .TUESDAY NIGHT... * Sky/weather.........Mostly cloudy. * Min temperature.....37-42...except 31-39 ridges. * Max humidity........63-74 percent. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...Northwest winds 1 to 6 mph. * Ridges/upr slopes....Northwest winds 1 to 6 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....Northwest 5 to 10 mph. * Ventilation Index...Low (123-195) decreasing to low (25-36) after midnight. .WEDNESDAY... * Sky/weather.........Partly cloudy. * Max temperature.....59-69...except 48-59 ridges. * Min humidity........30-44 percent...except 40-55 percent ridges. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 2 to 5 mph inthe afternoon. * Ridges/upr slopes....Northwest winds 2 to 7 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......7000 ft agl. * Transport winds.....Northwest 5 to 10 mph. * Ventilation Index...Low (36-74) increasing to moderate to high (388-510) in the afternoon. .Forecast days 3 through 7...... .THURSDAY...Mostly clear. Lows 33 to 42. Highs 55 to 70. North winds 4 to 9 mph. .FRIDAY...Mostly clear. Lows 35 to 44. Highs 58 to 73. Northwest winds 3 to 8 mph. .SATURDAY...Mostly clear. Lows 38 to 46. Highs 62 to 77. West winds 2 to 7 mph. .SUNDAY...Mostly clear. Lows 40 to 49. Highs 62 to 77. Southwest winds 3 to 8 mph. .MEMORIAL DAY...Partly cloudy with a slight chance of rain and snow showers. Lows 39 to 47. Highs 55 to 69. West winds 4 to 10 mph. $$ ORZ694-191130- Grande Ronde Valley of Oregon- 1221 PM PDT Mon May 18 2026 .TONIGHT... * Sky/weather.........Mostly clear. * Min temperature.....31-36. * Max humidity........76-91 percent. * Humidity recovery...Excellent. * 20-foot winds....... * Valleys/lwr slopes...North winds 3 to 8 mph in the evening becoming drainage winds less than 5 mph. * Ridges/upr slopes....North winds 4 to 9 mph in the evening becoming light winds less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....Northwest 5 to 10 mph. * Ventilation Index...Low to moderate (195-293) decreasing to low (25-26) after midnight. .TUESDAY... * Sky/weather.........Mostly sunny then becoming partly cloudy. * Max temperature.....65-70. * Min humidity........33-38 percent. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph. * Ridges/upr slopes....light less than 5 mph becoming north 2 to 5 mph in the afternoon. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......7000 ft agl. * Transport winds.....West 5 to 10 mph. * Ventilation Index...Low (44-80) increasing to moderate (377-485) in the afternoon. .TUESDAY NIGHT... * Sky/weather.........Partly cloudy. * Min temperature.....36-41. * Max humidity........78-93 percent. * Humidity recovery...Excellent. * 20-foot winds....... * Valleys/lwr slopes...Northwest winds 2 to 5 mph in the evening becoming drainage winds less than 5 mph. * Ridges/upr slopes....Northwest winds 2 to 6 mph in the evening becoming light winds less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....Northwest 5 to 10 mph. * Ventilation Index...Low (146-194) decreasing to low (25-32) after midnight. .WEDNESDAY... * Sky/weather.........Partly cloudy. * Max temperature.....67-72. * Min humidity........34-39 percent. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 2 to 7 mph in the afternoon. * Ridges/upr slopes....light less than 5 mph becoming north 3 to 7 mph in the afternoon. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......6500 ft agl. * Transport winds.....Northwest 5 to 10 mph. * Ventilation Index...Low (39-63) increasing to moderate (406-482) in the afternoon. .Forecast days 3 through 7...... .THURSDAY...Mostly clear. Lows 37 to 42. Highs 70 to 75. North winds 4 to 10 mph. .FRIDAY...Mostly clear. Lows 39 to 44. Highs 73 to 78. Northwest winds 3 to 8 mph. .SATURDAY...Mostly clear. Lows 41 to 46. Highs 77 to 82. West winds 1 to 6 mph. .SUNDAY...Mostly clear. Lows 43 to 48. Highs 76 to 81. West winds 3 to 8 mph. .MEMORIAL DAY...Partly cloudy with a slight chance of showers. Lows 41 to 46. Highs 67 to72. Northwest winds 5 to 11 mph. $$ ORZ699-191130- Western Forested Blue Mountains- 1221 PM PDT Mon May 18 2026 .TONIGHT... * Sky/weather.........Partly cloudy. * Min temperature.....31-36. * Max humidity........67-82 percent. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...Northwest winds up to 5 mph in the evening becoming drainage winds less than 5 mph. * Ridges/upr slopes....Northwest winds 2 to 7 mph in the evening becoming light winds less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....Northwest 5 to 10 mph. * Ventilation Index...Moderate (283-389) decreasing to low (25-32) after midnight. .TUESDAY... * Sky/weather.........Mostly sunny then becoming partly cloudy. * Max temperature.....61-66...except 55-61 ridges. * Min humidity........28-39 percent. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph becoming west 1 to 5 mph in the afternoon. * Ridges/upr slopes....light less than 5 mph becoming west 2 to 6 mph in the afternoon. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......9000 ft agl. * Transport winds.....West 5 to 10 mph. * Ventilation Index...Low (74-120) increasing to high (502-612) in the afternoon. .TUESDAY NIGHT... * Sky/weather.........Partly cloudy then becoming mostly cloudy. * Min temperature.....36-41. * Max humidity........69-84 percent. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...Northwest winds 1 to 5 mph in the evening becoming drainage winds less than 5 mph. * Ridges/upr slopes....Northwest winds 1 to 6 mph in the evening becoming light winds less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....Northwest 5 to 10 mph. * Ventilation Index...Moderate (220-298) decreasing to low (25-35) after midnight. .WEDNESDAY... * Sky/weather.........Mostly cloudy then becoming partly cloudy. * Max temperature.....63-69...except 57-63 ridges. * Min humidity........30-42 percent. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 1 to 5 mph in the afternoon. * Ridges/upr slopes....light less than 5 mph becoming northwest 2 to 6 mph in the afternoon. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......9000 ft agl. * Transport winds.....Northwest 5 to 10 mph. * Ventilation Index...Low (38-70) increasing to moderate to high (388-560) in the afternoon. .Forecast days 3 through 7...... .THURSDAY...Mostly clear. Lows 37 to 42. Highs 62 to 71. North winds 1 to 6 mph. .FRIDAY...Mostly clear. Lows 38 to 44. Highs 66 to 74. Northwest winds 1 to 6 mph. .SATURDAY...Mostly clear. Lows 41 to 46. Highs 69 to 77. West winds 1 to 6 mph. .SUNDAY...Mostly clear. Lows 42 to 47. Highs 68 to 76. Southwest winds 1 to 6 mph. .MEMORIAL DAY...Partly cloudy with a slight chance of rain and snow showers. Lows 40 to 45. Highs 59 to 68. West winds 2 to 7 mph. $$ ORZ696-191130- John Day Valley- 1221 PM PDT Mon May 18 2026 .TONIGHT... * Sky/weather.........Mostly clear. * Min temperature.....33-38. * Max humidity........66-80 percent. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...Northwest winds 2 to 7 mph in the evening becoming drainage winds less than 5 mph. * Ridges/upr slopes....Northwest winds 2 to 7 mph in the evening becoming light winds less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....Northwest 5 to 10 mph. * Ventilation Index...Moderate (371-455) decreasing to low (25-26) after midnight. .TUESDAY... * Sky/weather.........Mostly sunny. * Max temperature.....63-71...except 59-64 ridges. * Min humidity........23-29 percent. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 2 to 6 mph in the afternoon. * Ridges/upr slopes....West winds 1 to 6 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......8500 ft agl. * Transport winds.....West 5 to 10 mph. * Ventilation Index...Low (51-87) increasing to high (515-607) in the afternoon. .TUESDAY NIGHT... * Sky/weather.........Partly cloudy then becoming mostly cloudy. * Min temperature.....38-43. * Max humidity........68-81 percent. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...Northwest winds 2 to 7 mph in the evening becoming drainage winds less than 5 mph. * Ridges/upr slopes....Northwest winds 2 to 7 mph in the evening becoming light winds less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....Northwest 5 to 10 mph. * Ventilation Index...Moderate (249-303) decreasing to low (25-28) after midnight. .WEDNESDAY... * Sky/weather.........Mostly cloudy then becoming mostly sunny. * Max temperature.....66-74...except 61-66 ridges. * Min humidity........25-31 percent. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 1 to 5 mph in the afternoon. * Ridges/upr slopes....light less than 5 mph becoming northwest 2 to 6 mph in the afternoon. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......7000 ft agl. * Transport winds.....Northwest 5 to 10 mph. * Ventilation Index...Low (29-53) increasing to moderate (348-466) in the afternoon. .Forecast days 3 through 7...... .THURSDAY...Mostly clear. Lows 39 to 45. Highs 69 to 77. North winds 2 to 7 mph. .FRIDAY...Mostly clear. Lows 41 to 46. Highs 72 to 81. North winds 1 to 6 mph. .SATURDAY...Mostly clear. Lows 44 to 49. Highs 74 to 83. Northwest winds 1 to 6 mph. .SUNDAY...Mostly clear. Lows 45 to 50. Highs 73 to 82. Southwest winds 1 to 6 mph. .MEMORIAL DAY...Partly cloudy with a slight chance of showers. Lows 42 to 47. Highs 65 to 73. West winds 3 to 8 mph. $$ ORZ700-191130- Central Mountains of Oregon- 1221 PM PDT Mon May 18 2026 .TONIGHT... * Sky/weather.........Mostly clear. * Min temperature.....30-37. * Max humidity........69-81 percent. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...Northwest winds 4 to 9 mph in the evening becoming drainage winds less than 5 mph. * Ridges/upr slopes....North winds 2 to 7 mph in the evening becoming light winds less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....North around 15 mph becoming northwest around 5 mph after midnight. * Ventilation Index...Moderate to high (459-609) decreasing to low (25-32) after midnight. .TUESDAY... * Sky/weather.........Mostly sunny. * Max temperature.....65-72...except 58-63 ridges. * Min humidity........18-27 percent. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 2 to 7 mph in the afternoon. * Ridges/upr slopes....light less than 5 mph becoming northwest 2 to 6 mph in the afternoon. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......9000 ft agl. * Transport winds.....West 5 to 10 mph. * Ventilation Index...Low (47-85) increasing to moderate to high (479-591) in the afternoon. .TUESDAY NIGHT... * Sky/weather.........Mostly cloudy. * Min temperature.....35-41. * Max humidity........71-82 percent. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...Northwest winds 3 to 8 mph in the evening becoming drainage winds less than 5 mph. * Ridges/upr slopes....Northwest winds 2 to 7 mph in the evening becoming light winds less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....North 5 to 10 mph. * Ventilation Index...Moderate (296-444) decreasing to low (25-69) after midnight. .WEDNESDAY... * Sky/weather.........Mostly cloudy then becoming mostly sunny. * Max temperature.....68-74...except 61-67 ridges. * Min humidity........21-28 percent. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph becoming north 1 to 6 mph in the afternoon. * Ridges/upr slopes....light less than 5 mph becoming north 1 to 5 mph in the afternoon. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......8000 ft agl. * Transport winds.....Northwest 5 to 10 mph. * Ventilation Index...Low (40-70) increasing to moderate (350-496) in the afternoon. .Forecast days 3 through 7...... .THURSDAY...Partly cloudy. Lows 37 to 44. Highs 71 to 78. North winds 3 to 8 mph. .FRIDAY...Mostly clear. Lows 38 to 46. Highs 73 to 81. North winds 2 to 7 mph. .SATURDAY...Mostly clear. Lows 41 to 47. Highs 76 to 82. Northwest winds 2 to 7 mph. .SUNDAY...Mostly clear. Lows 41 to 47. Highs 74 to 80. Southwest winds 3 to 8 mph. .MEMORIAL DAY...Partly cloudy with a slight chance of showers. Lows 39 to 45. Highs 65 to 72. West winds 5 to 11 mph. $$ ORZ703-191130- Warm Springs Reservation- 1221 PM PDT Mon May 18 2026 .TONIGHT... * Sky/weather.........Mostly clear. * Min temperature.....35-40. * Max humidity........72-85 percent. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...Northwest winds 6 to 12 mph becoming west 1 to 5 mph after midnight. * Ridges/upr slopes....West winds 4 to 10 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....West 10 to 15 mph. * Ventilation Index...Moderate to high (275-507) decreasing to low (27-45) after midnight. .TUESDAY... * Sky/weather.........Mostly sunny. * Max temperature.....65-75...except 53-62 ridges. * Min humidity........25-36 percent...except 37-52 percent ridges. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 4 to 9 mph in the afternoon. * Ridges/upr slopes....West winds 3 to 8 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......8000 ft agl. * Transport winds.....West 5 to 10 mph. * Ventilation Index...Low (65-107) increasing to moderate to high (463-645) in the afternoon. .TUESDAY NIGHT... * Sky/weather.........Mostly cloudy. * Min temperature.....39-44. * Max humidity........75-86 percent. * Humidity recovery...Good...except Excellent ridges. * 20-foot winds....... * Valleys/lwr slopes...Northwest winds 6 to 12 mph shifting to the west 1 to 6 mph after midnight. * Ridges/upr slopes....West winds 4 to 10 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....Northwest 10 to 15 mph. * Ventilation Index...Moderate (243-343) decreasing to low (29-57) after midnight. .WEDNESDAY... * Sky/weather.........Partly cloudy then becoming mostly sunny. * Max temperature.....69-77...except 57-66 ridges. * Min humidity........25-35 percent...except 36-51 percent ridges. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph becoming north 1 to 5 mph in the afternoon. * Ridges/upr slopes....Northwest winds 1 to 6 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......6500 ft agl. * Transport winds.....Northwest 5 to 10 mph. * Ventilation Index...Low (45-79) increasing to moderate (305-369) in the afternoon. .Forecast days 3 through 7...... .THURSDAY...Partly cloudy. Lows 41 to 46. Highs 69 to 80. North winds 3 to 8 mph. .FRIDAY...Mostly clear. Lows 44 to 49. Highs 71 to 83. Northwest winds 2 to 7 mph. .SATURDAY...Mostly clear. Lows 44 to 49. Highs 70 to 84. West winds 4 to 9 mph. .SUNDAY...Partly cloudy. Lows 43 to 48. Highs 66 to 80. West winds 5 to 11 mph. .MEMORIAL DAY...Partly cloudy with a slight chance of showers. Lows 40 to 46. Highs 59 to 72. West winds 6 to 12 mph. $$ ORZ704-191130- Northern Deschutes National Forest- 1221 PM PDT Mon May 18 2026 .TONIGHT... * Sky/weather.........Mostly clear. * Min temperature.....29-35. * Max humidity........72-87 percent. * Humidity recovery...Excellent...except Good ridges. * 20-foot winds....... * Valleys/lwr slopes...Northwest winds 2 to 7 mph in the evening becoming drainage winds less than 5 mph. * Ridges/upr slopes....Northwest winds 4 to 9 mph in the evening becoming light winds less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....West 5 to 10 mph. * Ventilation Index...Moderate (272-350) decreasing to low (25-28) after midnight. .TUESDAY... * Sky/weather.........Mostly sunny. * Max temperature.....66-72...except 53-64 ridges. * Min humidity........26-32 percent...except 35-50 percent ridges. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 1 to 5 mph in the afternoon. * Ridges/upr slopes....light less than 5 mph becoming northwest 4 to 9 mph in the afternoon. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......8000 ft agl. * Transport winds.....West 5 to 10 mph. * Ventilation Index...Low (61-81) increasing to moderate to high (405-511) in the afternoon. .TUESDAY NIGHT... * Sky/weather.........Partly cloudy then becoming mostly cloudy. * Min temperature.....34-39. * Max humidity........74-89 percent. * Humidity recovery...Excellent. * 20-foot winds....... * Valleys/lwr slopes...Northwest winds 2 to 7 mph in the evening becoming drainage winds less than 5 mph. * Ridges/upr slopes....West winds 4 to 10 mph in the evening becoming light winds less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....West around 10 mph. * Ventilation Index...Moderate (211-293) decreasing to low (28-50) after midnight. .WEDNESDAY... * Sky/weather.........Partly cloudy then becoming mostly sunny. * Max temperature.....70-75...except 56-67 ridges. * Min humidity........26-32 percent...except 35-50 percent ridges. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph. * Ridges/upr slopes....light less than 5 mph becoming north 1 to 6 mph in the afternoon. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......6500 ft agl. * Transport winds.....North 5 to 10 mph. * Ventilation Index...Low (40-68) increasing to moderate (308-360) in the afternoon. .Forecast days 3 through 7...... .THURSDAY...Partly cloudy. Lows 37 to 43. Highs 64 to 77. Northeast winds 2 to 7 mph..FRIDAY...Mostly clear. Lows 39 to 44. Highs 66 to 80. Northwest winds 1 to 6 mph. .SATURDAY...Mostly clear. Lows 40 to 45. Highs 66 to 80. West winds 2 to 7 mph. .SUNDAY...Mostly clear. Lows 39 to 44. Highs 62 to 76. West winds 4 to 9 mph. .MEMORIAL DAY...Partly cloudy with a slight chance of rain and snow showers. Lows 37 to 43. Highs 55 to 68. West winds 5 to 11 mph. $$ ORZ705-191130- Southern Deschutes National Forest- 1221 PM PDT Mon May 18 2026 .TONIGHT... * Sky/weather.........Partly cloudy. * Min temperature.....27-32. * Max humidity........76-91 percent...except 64-79 percent ridges. * Humidity recovery...Excellent...except Good ridges. * 20-foot winds....... * Valleys/lwr slopes...Northwest winds 1 to 6 mph in the evening becoming drainage winds less than 5 mph. * Ridges/upr slopes....Northwest winds 2 to 7 mph in the evening becoming light winds less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....North 5 to 10 mph. * Ventilation Index...Moderate to high (288-542) decreasing to low (25-34) after midnight. .TUESDAY... * Sky/weather.........Mostly sunny. * Max temperature.....64-70...except 54-63 ridges. * Min humidity........22-29 percent...except 25-40 percent ridges. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 1 to 5 mph in the afternoon. * Ridges/upr slopes....light less than 5 mph becoming northwest 2 to 7 mph in the afternoon. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......9000 ft agl. * Transport winds.....Northwest 5 to 10 mph. * Ventilation Index...Low (49-75) increasing to moderate to high (403-523) in the afternoon. .TUESDAY NIGHT... * Sky/weather.........Partly cloudy then becoming mostly cloudy. * Min temperature.....32-37. * Max humidity........80-95 percent...except 68-83 percent ridges. * Humidity recovery...Excellent...except Good ridges. * 20-foot winds....... * Valleys/lwr slopes...Northwest winds 2 to 6 mph in the evening becoming drainage winds less than 5 mph. * Ridges/upr slopes....Northwest winds 2 to 7 mph in the evening becoming light winds less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....Northwest 5 to 10 mph. * Ventilation Index...Moderate (215-421) decreasing to low (26-74) after midnight. .WEDNESDAY... * Sky/weather.........Mostly cloudy then becoming mostly sunny. * Max temperature.....68-73...except 57-66 ridges. * Min humidity........23-30 percent...except 27-42 percent ridges. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph. * Ridges/upr slopes....light less than 5 mph becoming north 1 to 5 mph in the afternoon. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......8000 ft agl. * Transport winds.....North 5 to 10 mph. * Ventilation Index...Low (36-64) increasing to moderate (329-413) in the afternoon. .Forecast days 3 through 7...... .THURSDAY...Partly cloudy. Lows 35 to 40. Highs 68 to 76. Northeast winds 1 to 6 mph. .FRIDAY...Mostly clear. Lows 37 to 42. Highs 69 to 79. North winds 1 to 6 mph. .SATURDAY...Mostly clear. Lows 38 to 43. Highs 69 to 79. Northwest winds 1 to 6 mph. .SUNDAY...Mostly clear. Lows 38 to 43. Highs 66 to 77. Southwest winds 1 to 6 mph. .MEMORIAL DAY...Partly cloudy with a slight chance of rain and snow showers. Lows 36 to 41. Highs 58 to 69. West winds 2 to 7 mph. $$ ORZ697-191130- Central Blue Mountains- 1221 PM PDT Mon May 18 2026 .TONIGHT... * Sky/weather.........Partly cloudy. * Min temperature.....29-34. * Max humidity........62-74 percent. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...North winds 1 to 6 mph in the evening becoming drainage winds less than 5 mph. * Ridges/upr slopes....Northwest winds 2 to 7 mph in the evening becoming light winds less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....North 5 to 10 mph. * Ventilation Index...Moderate (411-489) decreasing to low (25-33) after midnight. .TUESDAY... * Sky/weather.........Mostly sunny then becoming partly cloudy. * Max temperature.....61-66...except 55-61 ridges. * Min humidity........23-29 percent. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 2 to 5 mph in the afternoon. * Ridges/upr slopes....West winds 1 to 6 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......9500 ft agl. * Transport winds.....West 5 to 10 mph. * Ventilation Index...Low (87-137) increasing to high (599-683) in the afternoon. .TUESDAY NIGHT... * Sky/weather.........Partly cloudy then becoming mostly cloudy. * Min temperature.....34-39. * Max humidity........64-75 percent. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...Northwest winds 1 to 5 mph in the evening becoming drainage winds less than 5 mph. * Ridges/upr slopes....Northwest winds 2 to 7 mph in the evening becoming light winds less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....North around 10 mph. * Ventilation Index...Moderate (276-324) decreasing to low (26-38) after midnight. .WEDNESDAY... * Sky/weather.........Mostly cloudy then becoming partly cloudy. * Max temperature.....64-69...except 59-65 ridges. * Min humidity........26-31 percent. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph. * Ridges/upr slopes....light less than 5 mph becoming northwest 2 to 6 mph in the afternoon. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......9000 ft agl. * Transport winds.....Northwest around 10 mph. * Ventilation Index...Low (54-84) increasing to high (518-632) in the afternoon. .Forecast days 3 through 7...... .THURSDAY...Mostly clear. Lows 35 to 41. Highs 64 to 71. North winds 2 to 7 mph. .FRIDAY...Mostly clear. Lows 37 to 42. Highs 67 to 74. Northwest winds 1 to 6 mph. .SATURDAY...Mostly clear. Lows 40 to 45. Highs 71 to 77. Northwest winds 1 to 6 mph. .SUNDAY...Mostly clear. Lows 42 to 47. Highs 70 to 76. Southwest winds 2 to 7 mph. .MEMORIAL DAY...Partly cloudy with a slight chance of rain and snow showers. Lows 40 to 45. Highs 62 to 68. West winds 3 to 8 mph. $$ ORZ698-191130- Southern Blue Mountains- 1221 PM PDT Mon May 18 2026 .TONIGHT... * Sky/weather.........Partly cloudy. * Min temperature.....29-34. * Max humidity........61-73 percent. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...North winds 1 to 6 mph in the evening becoming drainage winds less than 5 mph. * Ridges/upr slopes....North winds 2 to 6 mph in the evening becoming light winds less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....North around 10 mph. * Ventilation Index...Moderate to high (463-579) decreasing to low (29-39) after midnight. .TUESDAY... * Sky/weather.........Mostly sunny then becoming partly cloudy. * Max temperature.....62-68. * Min humidity........18-23 percent. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 2 to 5 mph in the afternoon. * Ridges/upr slopes....light less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......10000 ft agl. * Transport winds.....Northwest 5 to 10 mph. * Ventilation Index...Low (81-121) increasing to high to very high (659-739) in the afternoon. .TUESDAY NIGHT... * Sky/weather.........Partly cloudy then becoming mostly cloudy. * Min temperature.....34-39. * Max humidity........64-76 percent. * Humidity recovery...Good. * 20-foot winds....... * Valleys/lwr slopes...Northwest winds 2 to 6 mph in the evening becoming drainage winds less than 5 mph. * Ridges/upr slopes....Northwest winds 2 to 5 mph in the evening becoming light winds less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......500 ft agl. * Transport winds.....North around 10 mph. * Ventilation Index...Moderate (322-398) decreasing to low (34-42) after midnight. .WEDNESDAY... * Sky/weather.........Mostly cloudy then becoming partly cloudy. * Max temperature.....66-72. * Min humidity........21-26 percent. * 20-foot winds....... * Valleys/lwr slopes...Upslope less than 5 mph. * Ridges/upr slopes....light less than 5 mph. * CWR.................0 percent. * Chc of lightning....0 percent. * Mixing height.......9000 ft agl. * Transport winds.....Northwest 5 to 10 mph. * Ventilation Index...Low (57-75) increasing to high (589-667) in the afternoon. .Forecast days 3 through 7...... .THURSDAY...Mostly clear. Lows 36 to 41. Highs 69 to 75. North winds 3 to 8 mph. .FRIDAY...Mostly clear. Lows 37 to 43. Highs 71 to 77. North winds 1 to 6 mph. .SATURDAY...Mostly clear. Lows 40 to 45. Highs 75 to 80. Northwest winds 1 to 6 mph. .SUNDAY...Mostly clear. Lows 41 to 47. Highs 75 to 81. West winds 3 to 8 mph. .MEMORIAL DAY...Partly cloudy with a slight chance of showers. Lows 39 to 45. Highs 66 to 73. West winds 4 to 9 mph. $$ .8-14 DAY OUTLOOK for Tuesday May 26 through Monday June 1... A greater chance of above-normal temperatures and below-normal precipitation. $$