


Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Missoula, MT
Issued by NWS Missoula, MT
345 FNUS55 KMSO 192034 FWFMSO Fire Weather Planning Forecast for Wrn Montana and N Cntrl Idaho National Weather Service Missoula MT 234 PM MDT Tue Aug 19 2025 ...RED FLAG WARNING IN EFFECT FROM 1 PM TO 10 PM MDT WEDNESDAY for East Beaverhead... .DISCUSSION... Idaho (Zones 102 and 103): A dry cold front will pass through on Wednesday cooling temperatures a few degrees, but also increasing westerly to northwesterly winds. Very dry air will filter in behind the front on Thursday, despite temperatures remaining slightly cooler. Warming trend will occur Friday into the weekend as high pressure strengthens. Northeasterly winds will develop on Friday and may last into the weekend. Northwest MT (Zones 104 and 105): A dry cold front will pass through on Wednesday cooling temperatures a few degrees, but also increasing westerly to northwesterly winds. Very dry air will filter in behind the front on Thursday, despite temperatures remaining slightly cooler. Warming trend will occur Friday into the weekend as high pressure strengthens. Northeasterly winds will develop on Friday and may last into the weekend. West Central MT (Zones 106, 107 and 108): Thunderstorm outflow winds 40 to 50 mph are possible this evening with stronger storms. A dry cold front will pass through on Wednesday cooling temperatures a few degrees, but also increasing westerly to northwesterly winds. Elevated fire weather conditions due to dry, breezy and unstable conditions are anticipated. Very dry air will filter in behind the front on Thursday, despite temperatures remaining slightly cooler. Warming trend will occur Friday into the weekend as high pressure strengthens. Northeasterly winds will develop on Friday and may last into the weekend. Bitterroot NF (Zone 109): Thunderstorm outflow winds 40 to 50 mph are possible this evening with stronger storms. A dry cold front will pass through on Wednesday cooling temperatures a few degrees, but also increasing westerly to northwesterly winds. Elevated fire weather conditions due to dry, breezy and unstable conditions are anticipated. Very dry air will filter in behind the front on Thursday, despite temperatures remaining slightly cooler. Warming trend will occur Friday into the weekend as high pressure strengthens. Northeasterly winds will develop on Friday and may last into the weekend. Southwest MT (Zones 109, 110 and 111): Critical fire weather conditions are anticipated for Wednesday due to dry, breezy and very unstable conditions with a passing cold front. The most critical conditions are anticipated in southern portions of the east Beaverhead, where a red flag warning has been issued. Isolated to scattered thunderstorms are also anticipated, which will be capable of strong outflow winds. Warming trend will occur Friday into the weekend as high pressure strengthens. Northeasterly winds will develop on Friday and may last into the weekend. IDZ102-103-202045- Palouse/Hells Canyon-Clearwater/Nez Perce- 134 PM PDT Tue Aug 19 2025 .TONIGHT... * Sky/Weather.........Partly cloudy. Chance of rain showers and slight chance of thunderstorms. * Min Temperature.....50-60. * Max Humidity........49-59 percent. * 20-Foot Winds....... * Lower Elevation......Northwest 5-10 mph. * Ridge Top............Northwest 5-10 mph. * Mixing Height.......4 kft agl until 2000, then below 500 ft to 1 kft agl. * Transport Winds.....Northwest 10 mph. * Chance Lightning....20 percent in the Palouse/Hells Canyon...and 25 percent in the Clearwater/Nez Perce. * CWR (> 0.10 Inch)...10 percent. .WEDNESDAY... * Sky/Weather.........Mostly sunny. * Max Temperature.....85-95 valleys and 70-80 ridges. * Min Humidity........20-30 percent. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............Northwest up to 5 mph increasing to 5-15 mph in the afternoon. * Mixing Height.......3 kft agl until 1100. 8 kft agl after 1600. * Transport Winds.....Northwest 10 mph until 1600, then west 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .WEDNESDAY NIGHT... * Sky/Weather.........Mostly clear. * Min Temperature.....48-58. * Max Humidity........59-69 percent valleys and 53-63 percent ridges. * 20-Foot Winds....... * Lower Elevation......Northwest 5-10 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............Northwest 5-15 mph. * Mixing Height.......7 kft agl until 1900. Below 500 ft to 1 kft agl after 2000. * Transport Winds.....Northwest 15 mph until 2300, then variable less than 10 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .THURSDAY... * Sky/Weather.........Mostly sunny. * Max Temperature.....90-95 valleys and 70-80 ridges. * Min Humidity........12-22 percent. * 20-Foot Winds....... * Lower Elevation......Calm becoming upslope/upvalley 4-8 mph in the afternoon. * Ridge Top............Northeast up to 5 mph becoming northwest 5-10 mph in the afternoon. * Mixing Height.......1-2 kft agl until 1000. 8 kft agl after 1500. * Transport Winds.....Variable less than 10 mph. * Chance Lightning....0 percent in the Palouse/Hells Canyon...and near 0 percent in the Clearwater/Nez Perce. * CWR (> 0.10 Inch)...0 percent. .FRIDAY...Clear. Lows 55-65. Highs 85-95. Min humidities 15-25 percent. Northeast winds 5-10 mph. .SATURDAY...Mostly clear. Lows 55-65. Highs 90-100. Min humidities 10-20 percent. Northeast winds 5-10 mph. .SUNDAY...Partly cloudy. Lows 60-70. Highs 90-100. Northeast winds 5-10 mph. .MONDAY...Mostly clear. Lows 60-70. Highs 85-95. .TUESDAY...Mostly clear. Lows 60-70. Highs 85-95. $$ MTZ104-105-202045- Kootenai-Flathead/Glacier Park- 234 PM MDT Tue Aug 19 2025 .TONIGHT... * Sky/Weather.........Partly cloudy. Chance of rain showers and thunderstorms in zones 105. * Min Temperature.....50-60. * Max Humidity........75-85 percent valleys and 52-62 percent ridges. * 20-Foot Winds....... * Lower Elevation......Downslope/downvalley 1-3 mph. * Ridge Top............West 5-10 mph. * Mixing Height.......8 kft agl until 1900. Below 500 ft to 1 kft agl after 2000. * Transport Winds.....Southwest 15 mph until 2000, then west 10 mph. * Chance Lightning....Near 0 percent in the Kootenai...and 30 percent in the Flathead/Glacier Park. * CWR (> 0.10 Inch)...0 percent. .WEDNESDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....85-90 valleys and 65-75 ridges. * Min Humidity........18-28 percent valleys and 27-37 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............West 5-15 mph increasing to 10-20 mph in the afternoon. * Mixing Height.......2 kft agl until 1000. 9 kft agl after 1400. * Transport Winds.....Southwest 10 mph until 1100. West 25 mph after 1500. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .WEDNESDAY NIGHT... * Sky/Weather.........Partly cloudy. * Min Temperature.....45-55. * Max Humidity........71-81 percent valleys and 56-66 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 5-10 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............West 10-20 mph decreasing to 5-10 mph after midnight. * Mixing Height.......8 kft agl until 1900. Below 500 ft to 1 kft agl after 2000. * Transport Winds.....West 20 mph until 2200, then northwest 10 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .THURSDAY... * Sky/Weather.........Mostly sunny. * Max Temperature.....80-90 valleys and 65-75 ridges. * Min Humidity........9-19 percent valleys and 15-25 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm becoming upslope/upvalley 4-8 mph in the afternoon. * Ridge Top............West 5-10 mph. * Mixing Height.......3 kft agl until 1000. 9 kft agl after 1500. * Transport Winds.....West 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .FRIDAY...Mostly clear. Lows 45-55. Highs 75-85. Min humidities 15-25 percent. Northeast winds 10-15 mph. .SATURDAY...Clear. Lows 50-60. Highs 80-90. Min humidities 10-20 percent. Northeast winds 10-15 mph. .SUNDAY...Mostly clear. Lows 50-60. Highs 80-90. Northeast winds 10-15 mph. .MONDAY...Mostly clear. Lows 55-65. Highs 80-90. .TUESDAY...Mostly clear. Lows 55-65. Highs 80-90. $$ MTZ106-108-202045- West Lolo-East Lolo- 234 PM MDT Tue Aug 19 2025 .TONIGHT... * Sky/Weather.........Partly cloudy. Chance of rain showers and slight chance of thunderstorms. * Min Temperature.....50-60. * Max Humidity........63-73 percent valleys and 56-66 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 5-10 mph. * Ridge Top............Northwest 5-10 mph. * Mixing Height.......8 kft agl until 1900. Below 500 ft to 1 kft agl after 2000. * Transport Winds.....West 10 mph until 2100, then northwest 10 mph. * Chance Lightning....25 percent. * CWR (> 0.10 Inch)...10 percent. .WEDNESDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....80-90 valleys and 73-83 ridges. * Min Humidity........13-23 percent valleys and 22-32 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............West 10-15 mph. * Mixing Height.......2 kft agl until 1000. 10 kft agl after 1400. * Transport Winds.....West 10 mph until 1300, then 20 mph. * Chance Lightning....Near 0 percent in the West Lolo...and 20 percent in the East Lolo. * CWR (> 0.10 Inch)...0 percent. .WEDNESDAY NIGHT... * Sky/Weather.........Partly cloudy. * Min Temperature.....45-55. * Max Humidity........58-68 percent valleys and 51-61 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 10-15 mph in the evening becoming downslope/downvalley 5-10 mph. * Ridge Top............West 5-15 mph. * Mixing Height.......8 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....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .THURSDAY... * Sky/Weather.........Mostly sunny. * Max Temperature.....80-90 valleys and 73-83 ridges. * Min Humidity........11-21 percent. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............West 5-10 mph. * Mixing Height.......2 kft agl until 1000. 9 kft agl after 1300. * Transport Winds.....West 10 mph. * Chance Lightning....0 percent in the West Lolo...and near 0 percent in the East Lolo. * CWR (> 0.10 Inch)...0 percent. .FRIDAY...Clear. Lows 50-60. Highs 80-90. Min humidities 10-20 percent. Northeast winds 5-10 mph. .SATURDAY...Mostly clear. Lows 50-60. Highs 80-90. Min humidities 15-25 percent. East winds 5-10 mph. .SUNDAY...Mostly clear. Lows 50-60. Highs 85-95. East winds 5-10 mph. .MONDAY...Mostly clear. Lows 55-65. Highs 85-95. .TUESDAY...Mostly clear. Lows 55-65. Highs 80-90. $$ MTZ107-202045- Flathead Reservation- 234 PM MDT Tue Aug 19 2025 .TONIGHT... * Sky/Weather.........Partly cloudy. Chance of rain showers and slight chance of thunderstorms in the evening. * Min Temperature.....55-60. * Max Humidity........57-67 percent. * 20-Foot Winds....... * Lower Elevation......West 5-10 mph. * Ridge Top............West 5-10 mph. * Mixing Height.......9 kft agl until 1900. Below 500 ft to 1 kft agl after 2000. * Transport Winds.....Southwest 10 mph until 2000, then west 10 mph. * Chance Lightning....25 percent. * CWR (> 0.10 Inch)...10 percent. .WEDNESDAY... * Sky/Weather.........Mostly sunny. * Max Temperature.....90-95 valleys and 65-70 ridges. * Min Humidity........14-24 percent valleys and 25-35 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm becoming west 5-15 mph in the afternoon. * Ridge Top............West 5-10 mph increasing to 10-20 mph in the afternoon. * Mixing Height.......1-2 kft agl until 1000. 10 kft agl after 1400. * Transport Winds.....West 10 mph until 1400, then 20 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .WEDNESDAY NIGHT... * Sky/Weather.........Mostly clear. * Min Temperature.....50-55. * Max Humidity........50-60 percent. * 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.......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....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .THURSDAY... * Sky/Weather.........Mostly sunny. * Max Temperature.....85-90 valleys and 65-70 ridges. * Min Humidity........7-17 percent valleys and 13-23 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm becoming upslope/upvalley 4-8 mph in the afternoon. * Ridge Top............Southwest 5-10 mph becoming northwest in the afternoon. * Mixing Height.......2 kft agl until 1000. 10 kft agl after 1400. * Transport Winds.....West 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .FRIDAY...Clear. Lows 50-60. Highs 80-90. Min humidities 10-20 percent. Northeast winds 10-15 mph. .SATURDAY...Mostly clear. Lows 50-60. Highs 85-95. Min humidities 10-20 percent. Northeast winds 10-15 mph. .SUNDAY...Mostly clear. Lows 55-65. Highs 85-95. Northeast winds 10-15 mph. .MONDAY...Mostly clear. Lows 60-70. Highs 85-95. .TUESDAY...Mostly clear. Lows 55-65. Highs 85-95. $$ MTZ109-202045- Bitterroot- 234 PM MDT Tue Aug 19 2025 .TONIGHT... * Sky/Weather.........Partly cloudy. Chance of rain showers and slight chance of thunderstorms. Slight chance of rain after midnight. * Min Temperature.....50-60. * Max Humidity........72-82 percent valleys and 57-67 percent ridges. * 20-Foot Winds....... * Lower Elevation......Northwest 5-10 mph. * Ridge Top............Northwest 5-10 mph. * Mixing Height.......8 kft agl until 1900. 1-2 kft agl after 2000. * Transport Winds.....West 10 mph until 1900, then northwest 10 mph. * Chance Lightning....20 percent in the Darby, Sula, and West Fork Districts...and 25 percent in areas north of Hamilton. * CWR (> 0.10 Inch)...10 percent. .WEDNESDAY... * Sky/Weather.........Partly cloudy. Slight chance of thunderstorms in the afternoon. * Max Temperature.....85-90 valleys and 75-80 ridges. * Min Humidity........22-32 percent. * 20-Foot Winds....... * Lower Elevation......Calm becoming northwest 5-15 mph in the afternoon. * Ridge Top............Northwest up to 5 mph becoming west 5-15 mph in the afternoon. * Mixing Height.......3 kft agl until 1100. 10 kft agl after 1400. * Transport Winds.....Northwest 10 mph until 1300, then west 15 mph. * Chance Lightning....20 percent. * CWR (> 0.10 Inch)...10 percent. .WEDNESDAY NIGHT... * Sky/Weather.........Mostly clear. Slight chance of rain. * Min Temperature.....45-55. * Max Humidity........70-80 percent valleys and 55-65 percent ridges. * 20-Foot Winds....... * Lower Elevation......Northwest 5-15 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............Northwest 5-15 mph. * Mixing Height.......8 kft agl until 1900. Below 500 ft to 1 kft agl after 2000. * Transport Winds.....Northwest 15 mph until 2400, then variable less than 10 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .THURSDAY... * Sky/Weather.........Mostly sunny. * Max Temperature.....85-90 valleys and 70-75 ridges. * Min Humidity........15-25 percent. * 20-Foot Winds....... * Lower Elevation......Calm becoming upslope/upvalley 4-8 mph in the afternoon. * Ridge Top............North 5-10 mph. * Mixing Height.......3 kft agl until 1000. 9 kft agl after 1400. * Transport Winds.....Variable less than 10 mph until 1100, then west 10 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .FRIDAY...Clear. Lows 50-60. Highs 80-90. Min humidities 15-25 percent. Northeast winds 5-10 mph. .SATURDAY...Mostly clear. Lows 50-60. Highs 80-90. Min humidities 15-25 percent. Northeast winds 5-10 mph. .SUNDAY...Partly cloudy. Lows 55-65. Highs 80-90. Northeast winds 5-10 mph. .MONDAY...Partly cloudy. Lows 55-65. Highs 80-90. .TUESDAY...Partly cloudy. Lows 55-65. Highs 80-90. $$ MTZ111-202045- East Beaverhead- 234 PM MDT Tue Aug 19 2025 ...RED FLAG WARNING IN EFFECT FROM 1 PM TO 10 PM MDT WEDNESDAY... .TONIGHT... * Sky/Weather.........Partly cloudy. * Min Temperature.....50-55 valleys and 55-65 ridges. * Max Humidity........39-49 percent valleys and 17-27 percent ridges. * 20-Foot Winds....... * Lower Elevation......South 10-20 mph. * Ridge Top............South 10-20 mph. * Mixing Height.......Greater than 12 kft agl until 1900. Below 500 ft to 1 kft agl after 2000. * Transport Winds.....South 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .WEDNESDAY... * Sky/Weather.........Partly cloudy. Slight chance of thunderstorms in the afternoon. * Max Temperature.....90-95 valleys and 75-80 ridges. * Min Humidity........11-20 percent. * 20-Foot Winds....... * Lower Elevation......Southwest 5-15 mph. * Ridge Top............Southwest 10-20 mph. * Mixing Height.......1-2 kft agl until 1000, then 3 kft agl until 1100, then 7 kft agl until 1200, then greater than 12 kft agl. * Transport Winds.....Southwest 10 mph until 1100, then 20 mph. * Chance Lightning....15 percent. * CWR (> 0.10 Inch)...10 percent. .WEDNESDAY NIGHT... * Sky/Weather.........Partly cloudy. Slight chance of rain showers and thunderstorms. * Min Temperature.....50-55. * Max Humidity........75-85 percent valleys and 55-65 percent ridges. * 20-Foot Winds....... * Lower Elevation......Northwest 5-15 mph. * Ridge Top............Northwest 5-15 mph. * Mixing Height.......11 kft agl until 1900. Below 500 ft to 1 kft agl after 2000. * Transport Winds.....West 15 mph until 2000, then north 10 mph. * Chance Lightning....15 percent. * CWR (> 0.10 Inch)...0 percent. .THURSDAY... * Sky/Weather.........Mostly sunny. * Max Temperature.....85-90 valleys and 70-75 ridges. * Min Humidity........12-22 percent. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............North 5-15 mph. * Mixing Height.......3 kft agl until 1000. 12 kft agl after 1600. * Transport Winds.....Variable less than 10 mph until 1100, then west 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .FRIDAY...Mostly clear. Lows 50-60. Highs 75-85. Min humidities 15-25 percent. North winds 10-15 mph. .SATURDAY...Mostly clear. Lows 50-60. Highs 80-90. Min humidities 15-25 percent. Northeast winds 10-15 mph. .SUNDAY...Partly cloudy with slight chance of rain showers and thunderstorms. Chance of precipitation 20 percent. Lows 50-60. Highs 80-90. Northeast winds 10-15 mph. .MONDAY...Partly cloudy with slight chance of rain showers and thunderstorms. Chance of precipitation 20 percent. Lows 50-60. Highs 75-85. .TUESDAY...Partly cloudy with slight chance of rain showers and thunderstorms. Chance of precipitation 20 percent. Lows 50-60. Highs 75-85. $$ MTZ110-202045- Deerlodge/West Beaverhead- 234 PM MDT Tue Aug 19 2025 .TONIGHT... * Sky/Weather.........Partly cloudy. Chance of rain and slight chance of thunderstorms. * Min Temperature.....40-50 valleys and 50-55 ridges. * Max Humidity........65-75 percent valleys and 43-53 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 5-15 mph. * Ridge Top............West 5-15 mph. * Mixing Height.......Greater than 12 kft agl until 1900. Below 500 ft to 1 kft agl after 2000. * Transport Winds.....Southwest 15 mph until 2000, then northwest 10 mph. * Chance Lightning....20 percent. * CWR (> 0.10 Inch)...10 percent. .WEDNESDAY... * Sky/Weather.........Partly cloudy. Haze in the morning. Slight chance of thunderstorms in the afternoon. * Max Temperature.....73-83. * Min Humidity........13-23 percent. * 20-Foot Winds....... * Lower Elevation......Calm becoming west 5-15 mph in the afternoon. * Ridge Top............West 5-15 mph. * Mixing Height.......1-2 kft agl until 1000. Greater than 12 kft agl after 1400. * Transport Winds.....West 10 mph until 1200, then 20 mph. * Chance Lightning....25 percent. * CWR (> 0.10 Inch)...10 percent. .WEDNESDAY NIGHT... * Sky/Weather.........Partly cloudy. Slight chance of rain showers and thunderstorms. * Min Temperature.....35-45 valleys and 45-50 ridges. * Max Humidity........79-89 percent valleys and 61-71 percent ridges. * 20-Foot Winds....... * Lower Elevation......Northwest 5-15 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............Northwest 5-15 mph. * Mixing Height.......10 kft agl until 1900. Below 500 ft to 1 kft agl after 2000. * Transport Winds.....Northwest 15 mph until 0300, then variable less than 10 mph. * Chance Lightning....20 percent. * CWR (> 0.10 Inch)...10 percent. .THURSDAY... * Sky/Weather.........Mostly sunny. * Max Temperature.....80-85 valleys and 70-75 ridges. * Min Humidity........14-24 percent. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............Northwest 5-10 mph. * Mixing Height.......2 kft agl until 1000. 10 kft agl after 1500. * Transport Winds.....Variable less than 10 mph until 1100, then west 10 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .FRIDAY...Mostly clear. Lows 45-55. Highs 75-85. Min humidities 15-25 percent. Northeast winds 5-10 mph. .SATURDAY...Mostly clear. Lows 45-55. Highs 80-90. Min humidities 10-20 percent. Northeast winds 5-10 mph. .SUNDAY...Partly cloudy. Lows 50-60. Highs 75-85. Northeast winds 10-15 mph. .MONDAY...Partly cloudy with slight chance of rain showers and thunderstorms. Chance of precipitation 20 percent. Lows 50-60. Highs 75-85. .TUESDAY...Partly cloudy with slight chance of rain showers and thunderstorms. Chance of precipitation 20 percent. Lows 50-60. Highs 75-85. $$