FNUS55 KPIH 180812 FWFPIH Fire Weather Planning Forecast for Southeast Idaho National Weather Service Pocatello ID 212 AM MDT Mon May 18 2026 .DISCUSSION... * Central Idaho Dispatch Area weather impact summary (Zones 475 and 476)... The first part of this week will see BELOW AVERAGE temperatures with light rain and mountain snow showers through midweek. Beyond Wednesday, temperatures will quickly climb back to 10-15 degrees ABOVE AVERAGE by the weekend. A few showers are not out of the question over the weekend as well. * East Idaho Dispatch Area weather impact summary (Zones 410...411 and 413)... The first part of this week will see BELOW AVERAGE temperatures with some rain and mountain snow showers through midweek, especially this morning and again Wednesday night and Thursday. Beyond Wednesday, temperatures will quickly climb back to 10-15 degrees ABOVE AVERAGE by the weekend. A few showers are not out of the question over the weekend as well. * South Central Idaho Dispatch Area weather impact summary (Zones 422...425 and 427)... The first part of this week will see BELOW AVERAGE temperatures with light rain and mountain snow showers through midweek. Beyond Wednesday, temperatures will quickly climb back to 10-15 degrees ABOVE AVERAGE by the weekend. A few showers are not out of the question over the weekend as well. IDZ475-182230- East Salmon River Mountains/Salmon NF- 212 AM MDT Mon May 18 2026 .Today... * Sky/weather........Mostly sunny. Isolated showers in the afternoon. * Chc of thunder.....0 percent. * Max Temperature....47-54 valleys and 39-46 ridges. 24 hr trend......7 degrees up. * Min Humidity.......25-33 percent. 24 hr trend......9 percent down. * 20ft winds......... Valleys/lwr slopes...North 5 to 10 mph. Ridges/upr slopes....North 7 to 12 mph with gusts to around 20 mph. * Chc Wetting Rain...0 percent. * Mixing Height......10250-11250 ft AGL. * Transport Winds....North around 15 mph. .TONIGHT... * Sky/weather........Mostly clear. Isolated showers in the evening. * Chc of thunder.....0 percent. * Min Temperature....26-33 valleys and around 25 ridges. 24 hr trend......2 degrees up. * Max Humidity.......63-71 percent. 24 hr trend......9 percent down. * 20ft winds......... Valleys/lwr slopes...North 5 to 8 mph in the evening becoming light. Ridges/upr slopes....North 5 to 10 mph. Gusts up to 20 mph in the evening. * Chc Wetting Rain...0 percent. * Mixing Height......100-1100 ft AGL. * Transport Winds....North around 10 mph in the evening becoming light. .TUESDAY... * Sky/weather........Partly cloudy. Slight chance of showers in the afternoon. * Chc of thunder.....0 percent. * Max Temperature....53-60 valleys and 44-51 ridges. 24 hr trend......5 degrees up. * Min Humidity.......23-31 percent. 24 hr trend......2 percent down. * 20ft winds......... Valleys/lwr slopes...Light winds becoming west 5 to 8 mph in the afternoon. Ridges/upr slopes....West 5 to 10 mph with gusts to around 20 mph. * Chc Wetting Rain...0 percent. * Mixing Height......11000-12000 ft AGL. * Transport Winds....Light winds becoming west around 15 mph in the afternoon. .Forecast days 3 through 7...... .WEDNESDAY...Partly cloudy. Lows 29 to 36. Highs 52 to 59. West winds 10 to 15 mph with gusts to around 20 mph. .THURSDAY...Partly cloudy. Lows 32 to 39. Highs 55 to 62. Northwest winds 10 to 15 mph with gusts to around 25 mph. .FRIDAY...Partly cloudy. Lows 34 to 41. Highs 59 to 66. Northwest winds 10 to 15 mph with gusts to around 20 mph..SATURDAY...Partly cloudy. Lows in the upper 30s. Highs in the mid 60s. .SUNDAY...Mostly clear. Lows around 40. Highs in the upper 60s. $$ IDZ476-182230- Lemhi and Lost River Range/Challis NF- 212 AM MDT Mon May 18 2026 .Today... * Sky/weather........Mostly sunny. Isolated showers in the afternoon. * Chc of thunder.....0 percent. * Max Temperature....47-54 valleys and 36-43 ridges. 24 hr trend......5 degrees up. * Min Humidity.......21-29 percent valleys and 27-35 percent ridges. 24 hr trend......3 percent down. * 20ft winds......... Valleys/lwr slopes...North 13 to 23 mph. Ridges/upr slopes....Breezy. North 13 to 23 mph. Gusts up to 45 mph decreasing to 30 mph in the afternoon. * Chc Wetting Rain...0 percent. * Mixing Height......10500-11500 ft AGL. * Transport Winds....North 20 to 25 mph. .TONIGHT... * Sky/weather........Mostly clear. Isolated showers in the evening. * Chc of thunder.....0 percent. * Min Temperature....23-30. 24 hr trend......Little change. * Max Humidity.......56-64 percent. 24 hr trend......14 percent down. * 20ft winds......... Valleys/lwr slopes...North 7 to 10 mph in the evening becoming light. Ridges/upr slopes....North 8 to 13 mph with gusts to around 20 mph shifting to the northwest 4 to 5 mph after midnight. * Chc Wetting Rain...0 percent. * Mixing Height......400-1400 ft AGL. * Transport Winds....North around 10 mph in the evening becoming light. .TUESDAY... * Sky/weather........Partly cloudy. Slight chance of showers in the afternoon. * Chc of thunder.....0 percent. * Max Temperature....53-60 valleys and 42-49 ridges. 24 hr trend......6 degrees up. * Min Humidity.......20-28 percent valleys and 29-37 percent ridges. 24 hr trend......Little change. * 20ft winds......... Valleys/lwr slopes...West 4 to 9 mph. Ridges/upr slopes....West 5 to 10 mph with gusts to around 20 mph. * Chc Wetting Rain...0 percent. * Mixing Height......11250-12250 ft AGL. * Transport Winds....Light winds becoming west around 15 mph in the afternoon. .Forecast days 3 through 7...... .WEDNESDAY...Partly cloudy. Lows 28 to 35. Highs 51 to 58. West winds 10 to 15 mph with gusts to around 25 mph. .THURSDAY...Windy. Partly cloudy. Slight chance of showers. Lows 30 to 37. Highs 53 to 60. Northwest winds 20 to 35 mph with gusts to around 40 mph. .FRIDAY...Partly cloudy. Lows 32 to 39. Highs 58 to 65. West winds 10 to 15 mph with gusts to around 25 mph. .SATURDAY...Partly cloudy. Lows in the upper 30s. Highs in the mid 60s. .SUNDAY...Partly cloudy. Lows around 40. Highs in the upper 60s. $$ IDZ422-182230- Sawtooth Range/Northern Sawtooth NF- 212 AM MDT Mon May 18 2026 .Today... * Sky/weather........Mostly sunny. Isolated showers in the afternoon. * Chc of thunder.....0 percent. * Max Temperature....50-57 valleys and 38-45 ridges. 24 hr trend......6 degrees up. * Min Humidity.......17-25 percent valleys and 27-35 percent ridges. 24 hr trend......3 percent down. * 20ft winds......... Valleys/lwr slopes...North 13 to 18 mph. Ridges/upr slopes....North 13 to 18 mph. Gusts up to 40 mph decreasing to 25 mph in the afternoon. * Chc Wetting Rain...0 percent. * Mixing Height......11750-12750 ft AGL. * Transport Winds....North 20 to 25 mph. .TONIGHT... * Sky/weather........Mostly clear. Isolated showers in the evening. * Chc of thunder.....0 percent. * Min Temperature....25-32. 24 hr trend......2 degrees up. * Max Humidity.......50-58 percent. 24 hr trend......8 percent down. * 20ft winds......... Valleys/lwr slopes...North 4 to 9 mph. Ridges/upr slopes....North 4 to 9 mph. Gusts up to 15 mph in the evening. * Chc Wetting Rain...0 percent. * Mixing Height......200-1200 ft AGL. * Transport Winds....North around 10 mph in the evening becoming light. .TUESDAY... * Sky/weather........Partly cloudy. Slight chance of showers in the afternoon. * Chc of thunder.....0 percent. * Max Temperature....54-61 valleys and 41-48 ridges. 24 hr trend......3 degrees up. * Min Humidity.......22-30 percent valleys and 33-41 percent ridges. 24 hr trend......5 percent up. * 20ft winds......... Valleys/lwr slopes...Southwest 5 to 10 mph. Ridges/upr slopes....Southwest 5 to 10 mph with gusts to around 20 mph. * Chc Wetting Rain...0 percent. * Mixing Height......10000-11000 ft AGL. * Transport Winds....West 10 to 15 mph. .Forecast days 3 through 7...... .WEDNESDAY...Mostly clear. Lows 28 to 35. Highs 53 to 60. West winds 10 to 15 mph with gusts to around 25 mph. .THURSDAY...Mostly clear. Lows 31 to 38. Highs 56 to 63. Northwest winds 10 to 20 mph with gusts to around 25 mph. .FRIDAY...Partly cloudy. Lows 34 to 41. Highs 60 to 67. West winds 10 to 15 mph with gusts to around 20 mph. .SATURDAY...Mostly clear. Lows in the upper 30s. Highs in the upper 60s. .SUNDAY...Mostly clear. Lows around 40. Highs in the upper 60s. $$ IDZ425-182230- Middle Snake River Valley/Twin Falls BLM north of the Snake River- 212 AM MDT Mon May 18 2026 .Today... * Sky/weather........Mostly sunny. * Chc of thunder.....0 percent. * Max Temperature....Around 60. 24 hr trend......6 degrees up. * Min Humidity.......15-23 percent. 24 hr trend......2 percent down. * 20ft winds.........North winds 11 to 16 mph with gusts to around 25 mph. * Chc Wetting Rain...0 percent. * Mixing Height......12000-13000 ft AGL. * Transport Winds....North around 15 mph. .TONIGHT... * Sky/weather........Partly cloudy. Isolated rain showers in the evening. * Chc of thunder.....0 percent. * Min Temperature....Around 34. 24 hr trend......Little change. * Max Humidity.......56-64 percent. 24 hr trend......Little change. * 20ft winds.........North winds 4 to 9 mph with gusts to around 15 mph shifting to the east 4 to 6 mph after midnight. * Chc Wetting Rain...10 percent. * Mixing Height......100-1100 ft AGL. * Transport Winds....North around 10 mph shifting to the east after midnight. .TUESDAY... * Sky/weather........Mostly sunny. * Chc of thunder.....0 percent. * Max Temperature....Around 65. 24 hr trend......4 degrees up. * Min Humidity.......17-22 percent. 24 hr trend......Little change. * 20ft winds.........East winds 4 to 6 mph shifting to the southwest 5 to 10 mph with gusts to around 15 mph in the afternoon. * Chc Wetting Rain...0 percent. * Mixing Height......10250-11250 ft AGL. * Transport Winds....East around 10 mph shifting to the west in the afternoon. .Forecast days 3 through 7...... .WEDNESDAY...Mostly clear. Lows in the mid 30s. Highs around 70. Southwest winds 10 to 15 mph with gusts to around 25 mph. .THURSDAY...Partly cloudy. Lows around 40. Highs in the lower 70s. West winds 10 to 15 mph with gusts to around 25 mph. .FRIDAY...Partly cloudy. Lows in the lower 40s. Highs in the mid 70s. Southwest winds 10 to 15 mph with gusts to around 20 mph. .SATURDAY...Mostly clear. Lowsin the lower 40s. Highs around 80. .SUNDAY...Mostly clear. Lows in the mid 40s. Highs in the lower 80s. $$ IDZ427-182230- Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River- 212 AM MDT Mon May 18 2026 .Today... * Sky/weather........Partly cloudy then becoming mostly sunny. * Chc of thunder.....0 percent. * Max Temperature....55-61 valleys and 47-54 ridges. 24 hr trend......6 degrees up. * Min Humidity.......17-25 percent. 24 hr trend......5 percent down. * 20ft winds......... Valleys/lwr slopes...North 14 to 24 mph. Ridges/upr slopes....Breezy. North 14 to 24 mph with gusts to around 40 mph. * Chc Wetting Rain...0 percent. * Mixing Height......11250-12250 ft AGL. * Transport Winds....North 20 to 25 mph. .TONIGHT... * Sky/weather........Partly cloudy. Isolated showers in the evening. * Chc of thunder.....0 percent. * Min Temperature....30-37. 24 hr trend......Little change. * Max Humidity.......54-62 percent valleys and 50-58 percent ridges. 24 hr trend......Little change. * 20ft winds......... Valleys/lwr slopes...Northwest 9 to 14 mph shifting to the south 4 to 5 mph after midnight. Ridges/upr slopes....North 10 to 15 mph. Gusts up to 25 mph in the evening. * Chc Wetting Rain...0 percent. * Mixing Height......200-1200 ft AGL. * Transport Winds....Northwest 10 to 15 mph. .TUESDAY... * Sky/weather........Mostly sunny. * Chc of thunder.....0 percent. * Max Temperature....60-65 valleys and 52-59 ridges. 24 hr trend......5 degrees up. * Min Humidity.......16-23 percent valleys and 20-28 percent ridges. 24 hr trend......Little change. * 20ft winds......... Valleys/lwr slopes...Northwest 4 to 7 mph. Ridges/upr slopes....Northwest 4 to 8 mph. Gusts up to 15 mph in the afternoon. * Chc Wetting Rain...0 percent. * Mixing Height......10500-11500 ft AGL. * Transport Winds....Light winds becoming northwest around 10 mph in the afternoon. .Forecast days 3 through 7...... .WEDNESDAY...Mostly clear. Lows 34 to 41. Highs 62 to 69. Southwest winds 5 to 10 mph with gusts to around 20 mph. .THURSDAY...Partly cloudy. Lows 39 to 46. Highs 63 to 70. West winds 10 to 15 mph with gusts to around 25 mph. .FRIDAY...Mostly clear. Lows 41 to 48. Highs 68 to 75. West winds 10 to 15 mph with gusts to around 25 mph. .SATURDAY...Mostly clear. Lows in the mid 40s. Highs in the upper 70s. .SUNDAY...Mostly clear. Lows in the upper 40s. Highs in the upper 70s. $$ IDZ410-182230- Upper Snake River Valley/Idaho Falls BLM- 212 AM MDT Mon May 18 2026 .Today... * Sky/weather........Mostly cloudy then becoming partly cloudy. * Chc of thunder.....0 percent. * Max Temperature....50-57. 24 hr trend......3 degrees up. * Min Humidity.......20-28 percent. 24 hr trend......Little change. * 20ft winds.........North winds 12 to 22 mph with gusts to around 35 mph. * Chc Wetting Rain...0 percent. * Mixing Height......11500-12500 ft AGL. * Transport Winds....North 20 to 25 mph. .TONIGHT... * Sky/weather........Mostly clear. * Chc of thunder.....0 percent. * Min Temperature....25-30. 24 hr trend......3 degrees down. * Max Humidity.......64-72 percent. 24 hr trend......10 percent up. * 20ft winds.........Northeast winds 10 to 15 mph with gusts to around 20 mph. * Chc Wetting Rain...0 percent. * Mixing Height......300-1300 ft AGL. * Transport Winds....Northeast 10 to 15 mph. .TUESDAY... * Sky/weather........Mostly sunny then becoming partly cloudy. * Chc of thunder.....0 percent. *Max Temperature....56-63. 24 hr trend......6 degrees up. * Min Humidity.......18-26 percent. 24 hr trend......Little change. * 20ft winds.........East winds 4 to 6 mph shifting to the southwest 6 to 9 mph with gusts to around 15 mph in the afternoon. * Chc Wetting Rain...0 percent. * Mixing Height......11500-12500 ft AGL. * Transport Winds....Light winds becoming west around 15 mph in the afternoon. .Forecast days 3 through 7...... .WEDNESDAY...Mostly clear. Lows 31 to 36. Highs 61 to 68. Southwest winds 10 to 15 mph with gusts to around 25 mph. .THURSDAY...Windy. Partly cloudy. Chance of showers. Lows 35 to 40. Highs 61 to 68. North winds 20 to 30 mph with gusts to around 45 mph. .FRIDAY...Partly cloudy. Lows 35 to 40. Highs 66 to 73. Northeast winds 10 to 15 mph with gusts to around 25 mph. .SATURDAY...Partly cloudy. Lows in the upper 30s. Highs in the mid 70s. .SUNDAY...Partly cloudy. Lows in the lower 40s. Highs in the upper 70s. $$ IDZ411-182230- Centennial Mountains and Snake River Range/Targhee NF- 212 AM MDT Mon May 18 2026 .Today... * Sky/weather........Mostly cloudy then becoming partly cloudy. * Chc of thunder.....0 percent. * Max Temperature....Around 49 valleys and 38-45 ridges. 24 hr trend......Little change. * Min Humidity.......27-35 percent valleys and 36-44 percent ridges. 24 hr trend......Little change. * 20ft winds......... Valleys/lwr slopes...North 17 to 22 mph. Ridges/upr slopes....North 17 to 22 mph with gusts to around 40 mph. * Chc Wetting Rain...0 percent. * Mixing Height......8500-9500 ft AGL. * Transport Winds....North 20 to 25 mph. .TONIGHT... * Sky/weather........Mostly clear. * Chc of thunder.....0 percent. * Min Temperature....20-26. 24 hr trend......3 degrees down. * Max Humidity.......80-88 percent valleys and 64-72 percent ridges. 24 hr trend......2 percent up. * 20ft winds......... Valleys/lwr slopes...Northeast 8 to 13 mph. Ridges/upr slopes....Northeast 8 to 13 mph. Gusts up to 25 mph in the evening. * Chc Wetting Rain...0 percent. * Mixing Height......400-1400 ft AGL. * Transport Winds....Northeast 10 to 15 mph. .TUESDAY... * Sky/weather........Mostly sunny then becoming partly cloudy. Slight chance of showers in the afternoon. * Chc of thunder.....0 percent. * Max Temperature....Around 57 valleys and 46-53 ridges. 24 hr trend......8 degrees up. * Min Humidity.......20-27 percent valleys and 28-36 percent ridges. 24 hr trend......6 percent down. * 20ft winds......... Valleys/lwr slopes...Southwest 4 to 8 mph. Ridges/upr slopes....Southwest 4 to 8 mph with gusts to around 15 mph. * Chc Wetting Rain...0 percent. * Mixing Height......10500-11500 ft AGL. * Transport Winds....Light winds becoming west around 15 mph in the afternoon. .Forecast days 3 through 7...... .WEDNESDAY...Partly cloudy. Lows 27 to 34. Highs 50 to 57. Southwest winds 10 to 15 mph with gusts to around 25 mph. .THURSDAY...Windy. Partly cloudy. Chance of showers, slight chance of thunderstorms and snow showers. Lows 31 to 38. Highs 50 to 57. Northwest winds 20 to 35 mph with gusts to around 40 mph. .FRIDAY...Partly cloudy. Lows 31 to 37. Highs 55 to 62. North winds 10 to 15 mph with gusts to around 25 mph. .SATURDAY...Partly cloudy. Lows in the mid 30s. Highs in the mid 60s. .SUNDAY...Partly cloudy. Lows in the upper 30s. Highs in the upper 60s. $$ IDZ413-182230- Caribou Range/Caribou NF- 212 AM MDT Mon May 18 2026 .Today... * Sky/weather........Mostly cloudy then becoming partly cloudy. Scattered showers. * Chc of thunder.....0 percent. * Max Temperature....49-56 valleys and 39-46 ridges. 24 hr trend......2 degrees up. * Min Humidity.......28-36 percent valleys and 41-49 percent ridges. 24 hr trend......Little change. * 20ft winds......... Valleys/lwr slopes...North 12 to 22 mph. Ridges/upr slopes....North 12 to 22 mph with gusts to around 35 mph. * Chc Wetting Rain...0 percent. * Mixing Height......10750-11750 ft AGL. * Transport Winds....North 20 to 25 mph. .TONIGHT... * Sky/weather........Mostly clear. * Chc of thunder.....0 percent. * Min Temperature....24-31. 24 hr trend......6 degrees down. * Max Humidity.......72-80 percent. 24 hr trend......11 percent up. * 20ft winds......... Valleys/lwr slopes...North 8 to 13 mph. Ridges/upr slopes....North 8 to 13 mph with gusts to around 25 mph shifting to the east 4 to 7 mph with gusts to around 15 mph after midnight. * Chc Wetting Rain...0 percent. * Mixing Height......300-1300 ft AGL. * Transport Winds....North around 15 mph shifting to the northeast after midnight. .TUESDAY... * Sky/weather........Mostly sunny. * Chc of thunder.....0 percent. * Max Temperature....55-62 valleys and 47-54 ridges. 24 hr trend......6 degrees up. * Min Humidity.......21-29 percent valleys and 30-38 percent ridges. 24 hr trend......6 percent down. * 20ft winds......... Valleys/lwr slopes...East 4 to 5 mph shifting to the west 4 to 6 mph in the afternoon. Ridges/upr slopes....Southeast 4 to 7 mph shifting to the west 4 to 6 mph in the afternoon. Gusts up to 15 mph. * Chc Wetting Rain...0 percent. * Mixing Height......10500-11500 ft AGL. * Transport Winds....Light winds becoming northwest around 10 mph in the afternoon. .Forecast days 3 through 7...... .WEDNESDAY...Mostly clear. Lows 29 to 36. Highs 58 to 65. South winds 10 to 15 mph with gusts to around 20 mph. .THURSDAY...Partly cloudy. Slight chance of showers. Lows 34 to 41. Highs 59 to 66. West winds 10 to 15 mph with gusts to around 25 mph. .FRIDAY...Partly cloudy. Lows 34 to 41. Highs 64 to 71. Southwest winds 10 to 15 mph with gusts to around 25 mph. .SATURDAY...Partly cloudy. Lows around 40. Highs in the lower 70s. .SUNDAY...Mostly clear. Lows in the lower 40s. Highs in the mid 70s. $$ .OUTLOOK FOR MAY 25th-31st: ABOVE AVERAGE TEMPERATURES and NEAR AVERAGE PRECIPITATION. $$