FNUS55 KMSO 221922 FWFMSO Fire Weather Planning Forecast for Wrn Montana and N Cntrl Idaho National Weather Service Missoula MT 122 PM MDT Sat Aug 22 2026 ...HEAT ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO 7 PM PDT THIS EVENING for portions of Palouse/Hells Canyon... ...RED FLAG WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 6 AM MDT SUNDAY for portions of Kootenai...West Lolo... ...RED FLAG WARNING IN EFFECT FROM 1 PM TO 8 PM MDT SUNDAY for portions of Deerlodge/West Beaverhead... .DISCUSSION... Idaho (Zones 102 and 103): A weather system moving eastward from the Pacific Northwest will bring scattered showers and thunderstorms by late-afternoon through the evening. The primary hazard will be gusty outflow winds of 35-45 mph, with a Marginal Risk (5% probability) for isolated severe gusts exceeding 58 mph during this evening. Frequent lightning (posing a threat for new fire starts) and small hail remain secondary concerns. A cold front tonight into Sunday brings cooler daytime temperatures but deep boundary-layer mixing, producing gusty (20-30 mph) westerly winds amidst a dry airmass resulting in elevated fire weather conditions. Northwest MT (Zones 104 and 105): A weather system moving eastward from the Pacific Northwest will bring multiple rounds of convection this evening through early Sunday morning. The primary hazard will be gusty outflow winds of 35-45 mph, with a Marginal Risk (5% probability) for isolated severe gusts exceeding 58 mph during this evening. Frequent lightning (posing a threat for new fire starts) and small hail remain secondary concerns. A cold front tonight into Sunday brings cooler daytime temperatures but deep boundary-layer mixing, producing gusty (25-35 mph) westerly winds amidst a dry airmass resulting in elevated fire weather conditions. West Central MT (Zones 106, 107 and 108): A weather system moving eastward from the Pacific Northwest will bring scattered showers and thunderstorms by late-afternoon through the evening. The primary hazard will be gusty outflow winds of 35-45 mph, with a Marginal Risk (5% probability) for isolated severe gusts exceeding 58 mph during this evening. Frequent lightning (posing a threat for new fire starts) and small hail remain secondary concerns. Additional rounds of convection will bring lightning across Zone 106 overnight into early Sunday morning, where a Red Flag Warning is in effect. A cold front tonight into Sunday brings cooler daytime temperatures but deep boundary-layer mixing, producing gusty (25-35 mph) westerly winds amidst a dry airmass resulting in elevated fire weather conditions. Southwest MT (Zones 109, 110 and 111): A weather system moving eastward from the Pacific Northwest will bring scattered showers and thunderstorms through the evening. The primary hazard will be gusty outflow winds of 40-50 mph, with a Marginal Risk (5% probability) for isolated severe gusts exceeding 58 mph during this evening. Frequent lightning (posing a threat for new fire starts), small hail, and localized heavy rain remain secondary concerns. A cold front tonight into Sunday brings cooler daytime temperatures but deep boundary-layer mixing producing gusty southwest winds amidst a very dry airmass resulting in elevated fire weather conditions, with critical fire weather across Fire Zone 110. Sunday afternoon showers and thunderstorms (some of which may be strong to marginally severe) will focus in Zone 111. IDZ102-231930- Palouse/Hells Canyon- 1222 PM PDT Sat Aug 22 2026 ...HEAT ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO 7 PM PDT THIS EVENING... .TONIGHT... * Sky/Weather.........Partly cloudy. Chance of rain showers and thunderstorms. * Min Temperature.....50-60. * Max Humidity........59-69 percent. * 20-Foot Winds....... * Lower Elevation......Variable less than 5 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............Southwest 5-10 mph. * Mixing Height.......7 kft agl until 1900. Below 500 ft to 1 kft agl after 2000. * Transport Winds.....West 10 mph until 2000, then 10 mph. * Chance Lightning....25 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY... * Sky/Weather.........Partly cloudy then becoming sunny. * Max Temperature.....85-95 valleys and 65-70 ridges. * Min Humidity........15-25 percent valleys and 26-36 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 5-15 mph. * Ridge Top............West 10-15 mph in the afternoon. * Mixing Height.......Below 500 ft to 1 kft agl until 0900. 8 kft agl after 1500. * Transport Winds.....West 10 mph until 1400, then 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY NIGHT... * Sky/Weather.........Mostly clear. * Min Temperature.....45-55. * Max Humidity........58-68 percent valleys and 49-59 percent ridges. * 20-Foot Winds....... * Lower Elevation......Northwest 5-10 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............Northwest 5-10 mph becoming northeast after midnight. * Mixing Height.......7 kft agl until 1900. Below 500 ft to 1 kft agl after 2000. * Transport Winds.....Northwest 15 mph until 2200, then variable less than 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .MONDAY... * Sky/Weather.........Mostly sunny. * Max Temperature.....90-100 valleys and 70-75 ridges. * Min Humidity........11-21 percent. * 20-Foot Winds....... * Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in the afternoon. * Ridge Top............Southeast up to 5 mph becoming northwest 5-10 mph in the afternoon. * Mixing Height.......1-2 kft agl until 1100. 7 kft agl after 1300. * Transport Winds.....Variable less than 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .TUESDAY...Mostly clear. Lows 55-65. Highs 90-100. Min humidities 10-20 percent. East winds 5-10 mph. .WEDNESDAY...Partly cloudy. Lows 60-70. Highs 90-100. Min humidities 10-20 percent. East winds 10-15 mph. .THURSDAY...Not as warm. Mostly clear. Lows 55-65. Highs 80-90. Northwest winds 10-15 mph. .FRIDAY...Mostly clear. Lows 50-60. Highs 80-90. .SATURDAY...Mostly clear. Lows 50-60. Highs 80-90. $$ IDZ103-231930- Clearwater/Nez Perce- 1222 PM PDT Sat Aug 22 2026 .TONIGHT... * Sky/Weather.........Partly cloudy. Patchy smoke. Chance of rain showers and thunderstorms. * Min Temperature.....50-60. * Max Humidity........66-76 percent. * 20-Foot Winds....... * Lower Elevation......Variable less than 5 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............South 5-10 mph becoming southwest after midnight. * Mixing Height.......5 kft agl until 1900. Below 500 ft to 1 kft agl after 2000. * Transport Winds.....South 10 mph until 0100, then variable less than 10 mph. * Chance Lightning....25 percent over the Palouse/Hells Canyon...and 30 percent toward the Clearwater/Nez Perce. * CWR (> 0.10 Inch)...0 percent. .SUNDAY... * Sky/Weather.........Mostly sunny. * Max Temperature.....80-85 valleys and 70-75 ridges. * Min Humidity........21-31 percent. * 20-Foot Winds....... * Lower Elevation......West 5-15 mph. * Ridge Top............West 5-15 mph. * Mixing Height.......Below 500 ft to 1 kft agl until 1000. 7 kft agl after 1400. * Transport Winds.....West 10 mph until 1400, then 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY NIGHT... * Sky/Weather.........Mostly clear. * Min Temperature.....45-55. * Max Humidity........55-65 percent. * 20-Foot Winds....... * Lower Elevation......Downslope/downvalley 1-3 mph. * Ridge Top............Northwest 5-15 mph becoming south up to 5 mph after midnight. * Mixing Height.......5 kft agl until 2000, then below 500 ft to 1 kft agl. * Transport Winds.....West 15 mph until 2100, then variable less than 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .MONDAY... * Sky/Weather.........Mostly sunny. * Max Temperature.....85-90 valleys and 75-80 ridges. * Min Humidity........17-27 percent. * 20-Foot Winds....... * Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in the afternoon. * Ridge Top............South up to 5 mph becoming west 5-10 mph in the afternoon. * Mixing Height.......1-2 kft agl until 1100. 9 kft agl after 1500. * Transport Winds.....Variable less than 10 mph until 1100, then west 10 mph until 1700, then 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .TUESDAY...Mostly clear. Lows 55-65. Highs 80-90. Min humidities 15-25 percent. Southeast winds 5-10 mph. .WEDNESDAY...Partly cloudy. Lows 60-70. Highs 80-90. Min humidities 10-20 percent. Southeast winds 10-15 mph. .THURSDAY...Partly cloudy. Lows 55-65. Highs 75-85. Southwest winds 10-15 mph. .FRIDAY...Mostly clear. Lows 50-60. Highs 75-85. .SATURDAY...Mostly clear. Lows 50-60. Highs 70-80. $$ MTZ104-231930- Kootenai- 122 PM MDT Sat Aug 22 2026 ...RED FLAG WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 6 AM MDT SUNDAY... .TONIGHT... * Sky/Weather.........Partly cloudy. Patchy smoke in the evening. Chance of rain showers and thunderstorms. * Min Temperature.....50-60. * Max Humidity........90-100 percent valleys and 72-82 percent ridges. * 20-Foot Winds....... * Lower Elevation......Southwest 5-10 mph. * Ridge Top............Southwest 10-15 mph. * Mixing Height.......7 kft agl until 1900. Below 500 ft to 1 kft agl after 2000. * Transport Winds.....Southwest 10 mph until 2300, then northwest 10 mph until 2400, then southwest 10 mph. * Chance Lightning....25 percent. * CWR (> 0.10 Inch)...20 percent. .SUNDAY... * Sky/Weather.........Partly cloudy. Patchy smoke in the morning. * Max Temperature.....80-85 valleys and 58-68 ridges. * Min Humidity........18-28 percent valleys and 48-58 percent ridges. * 20-Foot Winds....... * Lower Elevation......Southwest 10-20 mph. * Ridge Top............Southwest 15-25 mph. * Mixing Height.......1-2 kft agl until 1000. 8 kft agl after 1400. * Transport Winds.....Southwest 15 mph until 1200, then 25 mph. * Chance Lightning....Near 0 percent over the Kootenai...and 20 percent toward the Flathead/Glacier Park. * CWR (> 0.10 Inch)...0 percent. .SUNDAY NIGHT... * Sky/Weather.........Partly cloudy. Patchy smoke. * Min Temperature.....45-55. * Max Humidity........89-99 percent valleys and 70-80 percent ridges. * 20-Foot Winds....... * Lower Elevation......Southwest 5-10 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............Southwest 10-20 mph. * Mixing Height.......6 kft agl until 2000. Below 500 ft to 1 kft agl after 2100. * Transport Winds.....West 20 mph until 2100, then southwest 10 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .MONDAY... * Sky/Weather.........Partly cloudy then becoming mostly sunny. * Max Temperature.....85-90 valleys and 63-73 ridges. * Min Humidity........14-24 percent valleys and 36-46 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............Southwest 5-10 mph. * Mixing Height.......Below 500 ft to 1 kft agl until 1000. 8 kft agl after 1500. * Transport Winds.....Variable less than 10 mph until 0700. 10 mph after 0900. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .TUESDAY...Mostly clear. Lows 55-65. Highs 85-95. Min humidities 10-20 percent. Diurnal terrain winds to 10 mph. .WEDNESDAY...Partly cloudy. Lows 55-65. Highs 85-95. Min humidities 15-25 percent. East winds 5-10 mph. .THURSDAY...Not as warm. Partly cloudy. Lows 55-65. Highs 75-85. Southwest winds 10-15 mph. .FRIDAY...Mostly clear. Lows 50-60. Highs 70-80. .SATURDAY...Mostly clear. Lows 50-60. Highs 70-80. $$ MTZ105-231930- Flathead/Glacier Park- 122 PM MDT Sat Aug 22 2026 .TONIGHT... * Sky/Weather.........Partly cloudy. Chance of rain showers and slight chance of thunderstorms. * Min Temperature.....50-60. * Max Humidity........99-100 percent valleys and 65-75 percent ridges. * 20-Foot Winds....... * Lower Elevation......Variable less than 5 mph in the evening becoming downslope/downvalley 1-3 mph. * Ridge Top............Southwest 5-15 mph. * Mixing Height.......6 kft agl until 1900. Below 500 ft to 1 kft agl after 2000. * Transport Winds.....Southwest 10 mph. * Chance Lightning....25 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....75-80 valleys and 60-70 ridges. * Min Humidity........21-31 percent valleys and 33-43 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............Southwest 5-15 mph increasing to west 15-25 mph in the afternoon. * Mixing Height.......1-2 kft agl until 1000. 8 kft agl after 1400. * Transport Winds.....Southwest 15 mph until 1300, then 25 mph. * Chance Lightning....15 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY NIGHT... * Sky/Weather.........Partly cloudy. Patchy smoke. * Min Temperature.....45-50. * Max Humidity........100 percent valleys and 60-70 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 5-10 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............West 15-25 mph. * Mixing Height.......6 kft agl until 2000, then below 500 ft to 1 kft agl. * Transport Winds.....West 25 mph until 2100, then 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .MONDAY... * Sky/Weather.........Mostly sunny. * Max Temperature.....80-85 valleys and 65-75 ridges. * Min Humidity........22-32 percent valleys and 28-38 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in the afternoon. * Ridge Top............Southwest 5-10 mph. * Mixing Height.......Below 500 ft to 1 kft agl until 0900. 7 kft agl after 1300. * Transport Winds.....Southwest 10 mph until 0700, then variable less than 10 mph until 0900, then west 10 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .TUESDAY...Mostly clear. Lows 50-60. Highs 75-85. Min humidities 15-25 percent. East winds 5-10 mph. .WEDNESDAY...Partly cloudy. Lows 55-65. Highs 80-90. Min humidities 20-30 percent. Southeast winds 5-10 mph. .THURSDAY...Not as warm. Partly cloudy. Lows 55-65. Highs 70-80. Southwest winds 10-20 mph. .FRIDAY...Mostly clear. Lows 50-60. Highs 70-80. .SATURDAY...Mostly clear. Lows 45-55. Highs 65-75. $$ MTZ106-231930- West Lolo- 122 PM MDT Sat Aug 22 2026 ...RED FLAG WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 6 AM MDT SUNDAY... .TONIGHT... * Sky/Weather.........Partly cloudy. Patchy smoke in the evening. Chance of rain showers and slight chance of thunderstorms. * Min Temperature.....55-60. * Max Humidity........78-88 percent valleys and 67-77 percent ridges. * 20-Foot Winds....... * Lower Elevation......Variable less than 5 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............Southwest 5-15 mph. * Mixing Height.......5 kft agl until 1900. Below 500 ft to 1 kft agl after 2000. * Transport Winds.....Southwest 10 mph. * Chance Lightning....25 percent. * CWR (> 0.10 Inch)...10 percent. .SUNDAY... * Sky/Weather.........Partly cloudy. Patchy smoke in the morning. * Max Temperature.....75-85 valleys and 68-78 ridges. * Min Humidity........23-33 percent. * 20-Foot Winds....... * Lower Elevation......West 5-15 mph. * Ridge Top............West 10-20 mph. * Mixing Height.......1-2 kft agl until 1000. 8 kft agl after 1400. * Transport Winds.....West 15 mph until 1400, then 20 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY NIGHT... * Sky/Weather.........Mostly clear. * Min Temperature.....45-55. * Max Humidity........74-84 percent valleys and 54-64 percent ridges. * 20-Foot Winds....... * Lower Elevation......Southwest 10-15 mph. * Ridge Top............West 10-20 mph becoming southwest 5-10 mph after midnight. * Mixing Height.......6 kft agl until 2000. Below 500 ft to 1 kft agl after 2100. * Transport Winds.....West 20 mph until 2100, then 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .MONDAY... * Sky/Weather.........Partly cloudy then becoming mostly sunny. * Max Temperature.....80-90 valleys and 73-83 ridges. * Min Humidity........19-29 percent. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............Southwest up to 5 mph. * Mixing Height.......Below 500 ft to 1 kft agl until 1000. 8 kft agl after 1500. * Transport Winds.....Southwest 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .TUESDAY...Mostly clear. Lows 55-65. Highs 85-95. Min humidities 10-20 percent. Diurnal terrain winds to 10 mph. .WEDNESDAY...Partly cloudy. Lows 60-70. Highs 80-90. Min humidities 15-25 percent. Diurnal terrain winds to 10 mph. .THURSDAY...Partly cloudy. Lows 55-65. Highs 75-85. Southwest winds 10-15 mph. .FRIDAY...Mostly clear. Lows 50-60. Highs 75-85. .SATURDAY...Mostly clear. Lows 50-60. Highs 70-80. $$ MTZ108-231930- East Lolo- 122 PM MDT Sat Aug 22 2026 .TONIGHT... * Sky/Weather.........Partly cloudy. Chance of rain showers and slight chance of thunderstorms. * Min Temperature.....50-55. * Max Humidity........100 percent valleys and 75-85 percent ridges. * 20-Foot Winds....... * Lower Elevation......Variable less than 5 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............South 5-10 mph. * Mixing Height.......5 kft agl until 1900, then below 500 ft to 1 kft agl. * Transport Winds.....Southwest 10 mph until 2200, then south 10 mph until 0500, then variable less than 10 mph. * Chance Lightning....25 percent over the West Lolo...and 20 percent toward the East Lolo. * CWR (> 0.10 Inch)...20 percent. .SUNDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....80-85 valleys and 70-75 ridges. * Min Humidity........12-22 percent valleys and 19-29 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to becoming 5-15 mph in the afternoon. * Ridge Top............Southwest 5-10 mph becoming west 10-20 mph in the afternoon. * Mixing Height.......Below 500 ft to 1 kft agl until 1000. 8 kft agl after 1500. * Transport Winds.....West 10 mph until 1200. 25 mph after 1600. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY NIGHT... * Sky/Weather.........Mostly clear. Patchy smoke. * Min Temperature.....35-45 valleys and 45-50 ridges. * Max Humidity........92-100 percent valleys and 58-68 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 5-15 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............West 10-20 mph. * Mixing Height.......6 kft agl until 2000, then below 500 ft to 1 kft agl. * Transport Winds.....West 20 mph until 2100, then 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .MONDAY... * Sky/Weather.........Mostly sunny. * Max Temperature.....80-85 valleys and 70-80 ridges. * Min Humidity........11-21 percent valleys and 19-29 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in the afternoon. * Ridge Top............West 5-10 mph. * Mixing Height.......1-2 kft agl until 1000. 8 kft agl after 1400. * Transport Winds.....West 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .TUESDAY...Mostly clear. Lows 50-60. Highs 80-90. Min humidities 10-20 percent. Northeast winds 5-10 mph. .WEDNESDAY...Partly cloudy. Lows 55-65. Highs 80-90. Min humidities 15-25 percent. Southeast winds 5-10 mph. .THURSDAY...Partly cloudy. Lows 50-60. Highs 80-90. Southwest winds 10-15 mph. .FRIDAY...Mostly clear. Lows 50-60. Highs 75-85. .SATURDAY...Mostly clear. Lows 50-60. Highs 75-85. $$ MTZ107-231930- Flathead Reservation- 122 PM MDT Sat Aug 22 2026 .TONIGHT... * Sky/Weather.........Partly cloudy. Chance of rain showers and slight chance of thunderstorms. * Min Temperature.....55-60. * Max Humidity........83-93 percent valleys and 73-83 percent ridges. * 20-Foot Winds....... * Lower Elevation......South 5-10 mph. * Ridge Top............South 10-15 mph. * Mixing Height.......5 kft agl until 1900. Below 500 ft to 1 kft agl after 2000. * Transport Winds.....Southwest 10 mph. * Chance Lightning....20 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY... * Sky/Weather.........Partly cloudy. Patchy smoke in the morning. * Max Temperature.....80-85 valleys and 60-65 ridges. * Min Humidity........18-28 percent valleys and 30-40 percent ridges. * 20-Foot Winds....... * Lower Elevation......Southwest 5-15 mph. * Ridge Top............West 5-15 mph increasing to 20-30 mph in the afternoon. * Mixing Height.......1-2 kft agl until 1000. 9 kft agl after 1400. * Transport Winds.....West 10 mph until 1200, then 20 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY NIGHT... * Sky/Weather.........Mostly clear. * Min Temperature.....45-55. * Max Humidity........70-80 percent valleys and 56-66 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 5-15 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............West 15-25 mph becoming southwest 5-15 mph after midnight. * Mixing Height.......7 kft agl until 2000. Below 500 ft to 1 kft agl after 2100. * Transport Winds.....West 20 mph until 2100, then southwest 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .MONDAY... * Sky/Weather.........Partly cloudy then becoming mostly sunny. * Max Temperature.....85-90 valleys and 60-65 ridges. * Min Humidity........16-26 percent valleys and 26-36 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in the afternoon. * Ridge Top............West 5-10 mph. * Mixing Height.......Below 500 ft to 1 kft agl until 1000. 8 kft agl after 1300. * Transport Winds.....Southwest 10 mph until 1700, then variable less than 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .TUESDAY...Mostly clear. Lows 55-65. Highs 85-95. Min humidities 10-20 percent. Northeast winds 5-10 mph. .WEDNESDAY...Partly cloudy. Lows 60-70. Highs 85-95. Min humidities 15-25 percent. East winds 5-10 mph. .THURSDAY...Partly cloudy. Lows 55-65. Highs 80-90. Southwest winds 10-15 mph. .FRIDAY...Mostly clear. Lows 50-60. Highs 75-85. .SATURDAY...Mostly clear. Lows 50-60. Highs 75-85. $$ MTZ109-231930- Bitterroot- 122 PM MDT Sat Aug 22 2026 .TONIGHT... * Sky/Weather.........Partly cloudy. Slight chance of rain showers and thunderstorms. * Min Temperature.....50-60. * Max Humidity........87-97 percent valleys and 71-81 percent ridges. * 20-Foot Winds....... * Lower Elevation......South 5-10 mph. * Ridge Top............South 5-10 mph. * Mixing Height.......1-2 kft agl until 2000, then below 500 ft to 1 kft agl. * Transport Winds.....Southwest 10 mph until 2000. 10 mph after 0500. * Chance Lightning....30 percent over the Darby, Sula, and West Fork Districts...and 25 percent toward areas north of Hamilton. * CWR (> 0.10 Inch)...0 percent. .SUNDAY... * Sky/Weather.........Partly cloudy then becoming sunny. * Max Temperature.....85-90 valleys and 65-70 ridges. * Min Humidity........14-24 percent valleys and 21-31 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to becoming west 10-15 mph in the afternoon. * Ridge Top............Southwest 5-10 mph becoming west 10-20 mph in the afternoon. * Mixing Height.......Below 500 ft to 1 kft agl until 1000. 9 kft agl after 1400. * Transport Winds.....Southwest 10 mph until 1200, then 20 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY NIGHT... * Sky/Weather.........Mostly clear. * Min Temperature.....45-55. * Max Humidity........81-91 percent valleys and 56-66 percent ridges. * 20-Foot Winds....... * Lower Elevation......Northwest 10-15 mph in the evening becoming downslope/downvalley 5-10 mph. * Ridge Top............West 5-15 mph. * Mixing Height.......6 kft agl until 2000, then below 500 ft to 1 kft agl. * Transport Winds.....West 15 mph until 2200, then variable less than 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .MONDAY... * Sky/Weather.........Mostly sunny. * Max Temperature.....85-90 valleys and 70-75 ridges. * Min Humidity........16-26 percent. * 20-Foot Winds....... * Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in the afternoon. * Ridge Top............Southwest up to 5 mph becoming west 5-10 mph in the afternoon. * Mixing Height.......Below 500 ft to 1 kft agl until 1000. 10 kft agl after 1400. * Transport Winds.....Variable less than 10 mph until 1200, then west 15 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .TUESDAY...Partly cloudy. Lows 55-65. Highs 80-90. Min humidities 15-25 percent. Southwest winds 5-10 mph. .WEDNESDAY...Partly cloudy. Lows 55-65. Highs 80-90. Min humidities 15-25 percent. South winds 5-10 mph. .THURSDAY...Partly cloudy. Lows 55-65. Highs 75-85. Southwest winds 10-15 mph. .FRIDAY...Partly cloudy. Lows 50-60. Highs 75-85. .SATURDAY...Mostly clear. Lows 50-60. Highs 70-80. $$ MTZ111-231930- East Beaverhead- 122 PM MDT Sat Aug 22 2026 .TONIGHT... * Sky/Weather.........Mostly cloudy. Chance of rain showers and thunderstorms. * Min Temperature.....50-55. * Max Humidity........97-100 percent valleys and 70-80 percent ridges. * 20-Foot Winds....... * Lower Elevation......South 5-10 mph. * Ridge Top............South 5-15 mph. * Mixing Height.......5 kft agl until 1900, then below 500 ft to 1 kft agl. * Transport Winds.....Southwest 15 mph until 2100, then south 10 mph. * Chance Lightning....60 percent. * CWR (> 0.10 Inch)...10 percent. .SUNDAY... * Sky/Weather.........Partly cloudy. Slight chance of thunderstorms in the afternoon. * Max Temperature.....85-90 valleys and 70-75 ridges. * Min Humidity........11-21 percent valleys and 17-27 percent ridges. * 20-Foot Winds....... * Lower Elevation......Southwest 15-25 mph. * Ridge Top............Southwest 15-25 mph. * Mixing Height.......Below 500 ft to 1 kft agl until 1000. 11 kft agl after 1400. * Transport Winds.....South 15 mph until 1200, then southwest 25 mph. * Chance Lightning....40 percent. * CWR (> 0.10 Inch)...10 percent. .SUNDAY NIGHT... * Sky/Weather.........Partly cloudy. * Min Temperature.....45-50. * Max Humidity........75-85 percent valleys and 48-58 percent ridges. * 20-Foot Winds....... * Lower Elevation......Southwest 5-15 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............West 10-20 mph becoming southwest 5-10 mph after midnight. * Mixing Height.......9 kft agl until 1900. Below 500 ft to 1 kft agl after 2000. * Transport Winds.....West 20 mph until 2100, then 10 mph. * Chance Lightning....15 percent. * CWR (> 0.10 Inch)...0 percent. .MONDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....85-90 valleys and 70-75 ridges. * Min Humidity........12-19 percent. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............Southwest up to 5 mph becoming west 5-15 mph in the afternoon. * Mixing Height.......Below 500 ft to 1 kft agl until 1000. 11 kft agl after 1500. * Transport Winds.....Southwest 10 mph until 1200, then west 20 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .TUESDAY...Partly cloudy with slight chance of rain showers. Chance of showers 20 percent. Lows 50-60. Highs 75-85. Min humidities 20-30 percent. Southwest winds 5-10 mph. .WEDNESDAY...Partly cloudy with chance of rain showers and slight chance of thunderstorms. Chance of precipitation 30 percent. Lows 50-60. Highs 80-90. Min humidities 15-25 percent. South winds 10-15 mph. .THURSDAY...Partly cloudy with slight chance of rain showers. Chance of showers 20 percent. Lows 50-60. Highs 80-90. South winds 10-20 mph. .FRIDAY...Partly cloudy. Lows 50-60. Highs 75-85. .SATURDAY...Partly cloudy. Lows 50-60. Highs 75-85. $$ MTZ110-231930- Deerlodge/West Beaverhead- 122 PM MDT Sat Aug 22 2026 ...RED FLAG WARNING IN EFFECT FROM 1 PM TO 8 PM MDT SUNDAY... .TONIGHT... * Sky/Weather.........Mostly cloudy. Chance of rain showers and slight chance of thunderstorms. * Min Temperature.....40-50 valleys and 50-55 ridges. * Max Humidity........96-100 percent valleys and 73-83 percent ridges. * 20-Foot Winds....... * Lower Elevation......South 5-10 mph. * Ridge Top............South 10-15 mph. * Mixing Height.......1-2 kft agl until 2000, then below 500 ft to 1 kft agl. * Transport Winds.....Southwest 10 mph until 0100, then south 10 mph. * Chance Lightning....40 percent. * CWR (> 0.10 Inch)...10 percent. .SUNDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....75-85 valleys and 70-75 ridges. * Min Humidity........11-21 percent valleys and 17-27 percent ridges. * 20-Foot Winds....... * Lower Elevation......Southwest 10-15 mph becoming west 15-25 mph in the afternoon. * Ridge Top............Southwest 15-25 mph. * Mixing Height.......1-2 kft agl until 1000. 11 kft agl after 1400. * Transport Winds.....Southwest 15 mph until 1200, then 25 mph. * Chance Lightning....15 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY NIGHT... * Sky/Weather.........Partly cloudy. Patchy smoke after midnight. * Min Temperature.....28-38 valleys and 45-50 ridges. * Max Humidity........85-95 percent valleys and 57-67 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 5-15 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............West 5-15 mph. * Mixing Height.......9 kft agl until 1900. Below 500 ft to 1 kft agl after 2000. * Transport Winds.....West 20 mph until 2100. Variable less than 10 mph after 0400. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .MONDAY... * Sky/Weather.........Mostly sunny. * Max Temperature.....80-85 valleys and 70-75 ridges. * Min Humidity........13-23 percent. * 20-Foot Winds....... * Lower Elevation......Calm to becoming west 10-15 mph in the afternoon. * Ridge Top............West 5-15 mph. * Mixing Height.......1-2 kft agl until 1000. 11 kft agl after 1600. * Transport Winds.....Southwest 10 mph until 1300, then west 15 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .TUESDAY...Partly cloudy. Lows 50-60. Highs 75-85. Min humidities 20-30 percent. West winds 5-10 mph. .WEDNESDAY...Partly cloudy with slight chance of rain showers and thunderstorms. Chance of precipitation 20 percent. Lows 50-60. Highs 75-85. Min humidities 15-25 percent. South winds 10-15 mph. .THURSDAY...Partly cloudy with slight chance of rain showers. Chance of showers 20 percent. Lows 50-60. Highs 75-85. Southwest winds 10-20 mph. .FRIDAY...Partly cloudy. Lows 45-55. Highs 75-85. .SATURDAY...Partly cloudy. Lows 45-55. Highs 70-80. $$