456 FNUS55 KMSO 182030 FWFMSO Fire Weather Planning Forecast for Wrn Montana and N Cntrl Idaho National Weather Service Missoula MT 230 PM MDT Fri Jul 18 2025 ...RED FLAG WARNING IN EFFECT UNTIL 10 PM PDT THIS EVENING for Palouse/Hells Canyon... ...Near critical fire weather conditions on Saturday in southwest Montana due to low RHs and gusty winds... .DISCUSSION... Idaho (Zones 102 and 103): A red flag warning remains in effect for fire zone 102 through this evening, mainly for the lower elevations near Lewiston. Hot, dry and windy conditions are expected as a dry cold front passes through the area. Winds will continue tonight into Saturday morning and expand into fire zone 103. There is an 80 percent probability for gusts 20 to 25 mph tomorrow. Though temperatures will be cooler, elevated fire weather conditions will be possible once again. There is increasing confidence for cooler and showery conditions by Monday, but wetting rain isn't likely. Northwest MT (Zones 104 and 105): A dry cold front passing tonight into Saturday will cool temperatures slightly for Saturday. A few showers or an isolated thunderstorm will be possible near the Canadian border. Breezy west winds will develop with the front later tonight over the terrain and into the valleys by Saturday morning. There is increasing confidence for cooler temperatures and light rainfall by Monday. Wetting rain chances range from 40 to 70 percent, with the higher chances near the Canadian border. West Central MT (Zones 106, 107 and 108): A dry cold front passing Saturday will cool temperatures slightly and bring breezy west winds. There is increasing confidence for cooler temperatures and light rainfall by Monday. Wetting rain chances range from 30 to 50 percent, with the higher chances on the CSKT. Bitterroot NF (Zone 109): A dry cold front passing Saturday will create gusty winds and low RHs. Despite cooler temperatures, a period of elevated fire weather conditions is anticipated. There is increasing confidence for cooler and showery conditions by Monday, but a wetting rain isn't likely. Southwest MT (Zones 110 and 111): Afternoon and early evening thunderstorms today will be capable of gusty and erratic winds, mainly for areas south of Dillon/Ennis. A dry cold front passing Saturday afternoon will create gusty winds and low RHs. Near critical fire weather conditions are possible, especially for southern portions of the Beaverhead/Deerlodge NF. IDZ102-192030- Palouse/Hells Canyon- 130 PM PDT Fri Jul 18 2025 ...RED FLAG WARNING IN EFFECT UNTIL 10 PM PDT THIS EVENING... .TONIGHT... * Sky/Weather.........Becoming partly cloudy. * Min Temperature.....60-65 valleys and 50-55 ridges. * Max Humidity........39-49 percent valleys and 46-56 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 5-15 mph becoming variable less than 5 mph after midnight. * Ridge Top............West 10-20 mph. * Mixing Height.......10 kft agl until 1900. Below 500 ft to 1 kft agl after 2100. * Transport Winds.....West 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .SATURDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....85-95 valleys and 70-75 ridges. * Min Humidity........14-24 percent valleys and 21-31 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 5-15 mph. * Ridge Top............West 5-15 mph. * Mixing Height.......2 kft agl until 0900. 9 kft agl after 1300. * Transport Winds.....West 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .SATURDAY NIGHT... * Sky/Weather.........Partly cloudy. * Min Temperature.....50-60. * Max Humidity........42-52 percent. * 20-Foot Winds....... * Lower Elevation......Northwest 10-15 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 2100. * Transport Winds.....West 15 mph until 2400, then variable less than 10 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....85-95 valleys and 65-70 ridges. * Min Humidity........14-24 percent valleys and 20-30 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm becoming upslope/upvalley 4-8 mph in the afternoon. * Ridge Top............West up to 5 mph increasing to 5-15 mph in the afternoon. * Mixing Height.......2 kft agl until 1000. 7 kft agl after 1600. * Transport Winds.....West 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .MONDAY...Mostly cloudy with slight chance of rain showers. Chance of showers 20 percent. Lows 60-70. Highs 75-85. Min humidities 25-35 percent. Northwest winds 10-15 mph. .TUESDAY...Partly cloudy with slight chance of rain. Chance of rain 20 percent. Lows 55-65. Highs 80-90. Min humidities 20-30 percent. East winds 5-10 mph. .WEDNESDAY...Mostly clear. Lows 55-65. Highs 85-95. Northwest winds 5-10 mph. .THURSDAY...Mostly clear. Lows 60-70. Highs 90-100. .FRIDAY...Mostly clear. Lows 60-70. Highs 85-95. $$ IDZ103-192030- Clearwater/Nez Perce- 130 PM PDT Fri Jul 18 2025 .TONIGHT... * Sky/Weather.........Becoming partly cloudy. * Min Temperature.....55-60 valleys and 45-55 ridges. * Max Humidity........44-54 percent. * 20-Foot Winds....... * Lower Elevation......West 10-15 mph. * Ridge Top............West 10-15 mph. * Mixing Height.......8 kft agl until 2000. 1-2 kft agl after 2100. * Transport Winds.....West 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .SATURDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....80-85 valleys and 65-75 ridges. * Min Humidity........22-32 percent valleys and 30-40 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 10-20 mph. * Ridge Top............West 15-25 mph. * Mixing Height.......3 kft agl until 0900. 8 kft agl after 1300. * Transport Winds.....West 15 mph until 1300, then 20 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .SATURDAY NIGHT... * Sky/Weather.........Partly cloudy. * Min Temperature.....45-55. * Max Humidity........49-59 percent. * 20-Foot Winds....... * Lower Elevation......West 10-15 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 2100. * Transport Winds.....West 15 mph until 2200, then variable less than 10 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....80-85 valleys and 65-75 ridges. * Min Humidity........20-30 percent. * 20-Foot Winds....... * Lower Elevation......Calm becoming upslope/upvalley 4-8 mph in the afternoon. * Ridge Top............West up to 5 mph increasing to 5-15 mph in the afternoon. * Mixing Height.......3 kft agl until 1000. 7 kft agl after 1200. * Transport Winds.....Southwest 10 mph until 1300, then west 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .MONDAY...Mostly cloudy with slight chance of rain. Chance of rain 20 percent. Lows 55-65. Highs 70-80. Min humidities 35-45 percent. Northwest winds 10-15 mph. .TUESDAY...Partly cloudy with slight chance of rain showers and thunderstorms. Chance of precipitation 20 percent. Lows 50-60. Highs 70-80. Min humidities 25-35 percent. Northwest winds 5-10 mph. .WEDNESDAY...Mostly clear. Lows 50-60. Highs 75-85. Southwest winds 5-10 mph. .THURSDAY...Mostly clear. Lows 55-65. Highs 80-90. .FRIDAY...Mostly clear. Lows 55-65. Highs 80-90. $$ MTZ104-105-192030- Kootenai-Flathead/Glacier Park- 230 PM MDT Fri Jul 18 2025 .TONIGHT... * Sky/Weather.........Partly cloudy. Slight chance of a thunderstorm in the Canadian border. * Min Temperature.....50-60. * Max Humidity........66-76 percent valleys and 54-64 percent ridges. * 20-Foot Winds....... * Lower Elevation......Southwest 10-15 mph. * Ridge Top............Southwest 10-20 mph. * Mixing Height.......8 kft agl until 2000. 1-2 kft agl after 2100. * Transport Winds.....Southwest 15 mph. * Chance Lightning....15 percent in the Kootenai...and near 0 percent in the Flathead/Glacier Park. * CWR (> 0.10 Inch)...0 percent. .SATURDAY... * Sky/Weather.........Partly cloudy. Slight chance of thunderstorms in the afternoon, mainly near the Canadian border. * Max Temperature.....75-85 valleys and 60-70 ridges. * Min Humidity........28-38 percent valleys and 45-55 percent ridges. * 20-Foot Winds....... * Lower Elevation......Southwest 15-25 mph. * Ridge Top............Southwest 20-30 mph. * Mixing Height.......3 kft agl until 0900. 8 kft agl after 1400. * Transport Winds.....West 20 mph. * Chance Lightning....25 percent. * CWR (> 0.10 Inch)...0 percent. .SATURDAY NIGHT... * Sky/Weather.........Partly cloudy. Slight chance of rain. * Min Temperature.....45-55. * Max Humidity........80-90 percent valleys and 62-72 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 10-15 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............West 15-25 mph becoming southwest 5-10 mph after midnight. * Mixing Height.......8 kft agl until 1900. Below 500 ft to 1 kft agl after 2100. * Transport Winds.....West 20 mph until 2200, then southwest 10 mph. * Chance Lightning....20 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY... * Sky/Weather.........Partly cloudy. Slight chance of thunderstorms in the afternoon. * Max Temperature.....80-85 valleys and 60-70 ridges. * Min Humidity........23-33 percent valleys and 37-47 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in the afternoon. * Ridge Top............Southwest 5-10 mph becoming west 10-20 mph in the afternoon. * Mixing Height.......3 kft agl until 0900. 9 kft agl after 1300. * Transport Winds.....Southwest 15 mph. * Chance Lightning....15 percent in the Kootenai...and 20 percent in the Flathead/Glacier Park. * CWR (> 0.10 Inch)...0 percent. .MONDAY...Mostly cloudy with slight chance of rain. Chance of rain 20 percent. Lows 50-60. Highs 65-75. Min humidities 35-45 percent. West winds 10-15 mph. .TUESDAY...Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Chance of precipitation 40 percent. Lows 50-60. Highs 65-75. Min humidities 35-45 percent. Northwest winds 5-10 mph. .WEDNESDAY...Partly cloudy. Lows 50-60. Highs 70-80. Southwest winds 10-15 mph. .THURSDAY...Mostly clear. Lows 50-60. Highs 75-85. .FRIDAY...Mostly clear. Lows 55-65. Highs 75-85. $$ MTZ106-108-192030- West Lolo-East Lolo- 230 PM MDT Fri Jul 18 2025 .TONIGHT... * Sky/Weather.........Partly cloudy. * Min Temperature.....50-60. * Max Humidity........42-52 percent. * 20-Foot Winds....... * Lower Elevation......Southwest 5-15 mph. * Ridge Top............Southwest 10-20 mph. * Mixing Height.......9 kft agl until 2000. Below 500 ft to 1 kft agl after 2100. * Transport Winds.....West 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .SATURDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....75-85 valleys and 68-78 ridges. * Min Humidity........20-30 percent valleys and 28-38 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 10-20 mph. * Ridge Top............West 15-25 mph. * Mixing Height.......3 kft agl until 0900. 9 kft agl after 1300. * Transport Winds.....West 20 mph until 1300, then 25 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .SATURDAY NIGHT... * Sky/Weather.........Partly cloudy. * Min Temperature.....45-55. * Max Humidity........55-65 percent valleys and 49-59 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 10-15 mph in the evening becoming downslope/downvalley 5-10 mph. * Ridge Top............West 15-25 mph decreasing to 5-10 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 2200, then 10 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....75-85 valleys and 68-78 ridges. * Min Humidity........14-24 percent valleys and 22-32 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 5-15 mph. * Ridge Top............Southwest 5-10 mph becoming west 10-20 mph in the afternoon. * Mixing Height.......2 kft agl until 0900. 9 kft agl after 1300. * Transport Winds.....Southwest 10 mph until 1100, then west 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .MONDAY...Mostly cloudy with slight chance of rain. Chance of rain 20 percent. Lows 55-65. Highs 70-80. Min humidities 35-45 percent. West winds 10-15 mph. .TUESDAY...Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Chance of precipitation 30 percent. Lows 50-60. Highs 70-80. Min humidities 25-35 percent. West winds 5-10 mph. .WEDNESDAY...Mostly clear. Lows 50-60. Highs 75-85. West winds 5-10 mph. .THURSDAY...Mostly clear. Lows 55-65. Highs 80-90. .FRIDAY...Mostly clear. Lows 55-65. Highs 80-90. $$ MTZ107-192030- Flathead Reservation- 230 PM MDT Fri Jul 18 2025 .TONIGHT... * Sky/Weather.........Partly cloudy. * Min Temperature.....60-65 valleys and 50-55 ridges. * Max Humidity........42-52 percent valleys and 57-67 percent ridges. * 20-Foot Winds....... * Lower Elevation......Southwest 10-15 mph. * Ridge Top............Southwest 10-20 mph. * Mixing Height.......9 kft agl until 2000. Below 500 ft to 1 kft agl after 2100. * Transport Winds.....Southwest 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .SATURDAY... * Sky/Weather.........Mostly cloudy. * Max Temperature.....85-90 valleys and 60-65 ridges. * Min Humidity........18-28 percent valleys and 32-42 percent ridges. * 20-Foot Winds....... * Lower Elevation......Southwest 15-25 mph. * Ridge Top............Southwest 20-30 mph. * Mixing Height.......1-2 kft agl until 0800. 10 kft agl after 1500. * Transport Winds.....Southwest 20 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .SATURDAY NIGHT... * Sky/Weather.........Partly cloudy. * Min Temperature.....50-60. * Max Humidity........47-57 percent. * 20-Foot Winds....... * Lower Elevation......West 5-15 mph in the evening becoming downslope/downvalley 2-5 mph. * Ridge Top............West 20-30 mph becoming southwest 5-15 mph after midnight. * Mixing Height.......10 kft agl until 1900. Below 500 ft to 1 kft agl after 2100. * Transport Winds.....West 20 mph until 2200, then southwest 10 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....85-90 valleys and 60-65 ridges. * Min Humidity........15-25 percent valleys and 25-35 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to becoming 5-15 mph in the afternoon. * Ridge Top............West 10-20 mph. * Mixing Height.......1-2 kft agl until 0900. 11 kft agl after 1400. * Transport Winds.....Southwest 10 mph until 1300, then 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .MONDAY...Mostly cloudy with chance of rain. Chance of rain 30 percent. Lows 55-65. Highs 70-80. Min humidities 30-40 percent. West winds 10-20 mph. .TUESDAY...Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Chance of precipitation 40 percent. Lows 55-65. Highs 75-85. Min humidities 25-35 percent. West winds 5-10 mph. .WEDNESDAY...Mostly clear. Slight chance of rain. Chance of rain 20 percent. Lows 55-65. Highs 80-90. West winds 5-10 mph. .THURSDAY...Mostly clear. Lows 55-65. Highs 85-95. .FRIDAY...Mostly clear. Lows 55-65. Highs 85-95. $$ MTZ109-192030- Bitterroot- 230 PM MDT Fri Jul 18 2025 .TONIGHT... * Sky/Weather.........Partly cloudy. * Min Temperature.....50-60. * Max Humidity........51-61 percent valleys and 44-54 percent ridges. * 20-Foot Winds....... * Lower Elevation......Northwest 10-15 mph becoming variable less than 5 mph after midnight. * Ridge Top............West 10-20 mph. * Mixing Height.......11 kft agl until 1900. 1-2 kft agl after 2100. * Transport Winds.....West 20 mph until 2100, then 10 mph. * Chance Lightning....Near 0 percent in the Darby, Sula, and West Fork Districts...and 0 percent in areas north of Hamilton. * CWR (> 0.10 Inch)...0 percent. .SATURDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....85-90 valleys and 70-75 ridges. * Min Humidity........19-29 percent valleys and 25-35 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 15-25 mph. * Ridge Top............West 15-25 mph. * Mixing Height.......2 kft agl until 0900. 9 kft agl after 1200. * Transport Winds.....West 15 mph until 1100, then 25 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .SATURDAY NIGHT... * Sky/Weather.........Partly cloudy. * Min Temperature.....45-55. * Max Humidity........65-75 percent valleys and 51-61 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 5-15 mph becoming variable less than 5 mph after midnight. * Ridge Top............West 10-20 mph decreasing to 5-10 mph after midnight. * Mixing Height.......9 kft agl until 1900. Below 500 ft to 1 kft agl after 2100. * Transport Winds.....West 20 mph until 2100, then 10 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY... * Sky/Weather.........Mostly cloudy. * Max Temperature.....80-85 valleys and 70-75 ridges. * Min Humidity........20-30 percent. * 20-Foot Winds....... * Lower Elevation......Calm becoming west 5-15 mph in the afternoon. * Ridge Top............West up to 5 mph increasing to 10-20 mph in the afternoon. * Mixing Height.......3 kft agl until 1000. 9 kft agl after 1300. * Transport Winds.....Southwest 10 mph until 1100, then west 20 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .MONDAY...Mostly cloudy with chance of rain. Chance of rain 30 percent. Lows 55-65. Highs 70-80. Min humidities 25-35 percent. Northwest winds 10-15 mph. .TUESDAY...Partly cloudy with slight chance of rain showers and thunderstorms. Chance of precipitation 20 percent. Lows 50-60. Highs 70-80. Min humidities 20-30 percent. Northwest winds 5-10 mph. .WEDNESDAY...Mostly clear. Lows 50-60. Highs 75-85. West winds 10-15 mph. .THURSDAY...Mostly clear. Lows 55-65. Highs 80-90. .FRIDAY...Mostly clear. Lows 55-65. Highs 80-90. $$ MTZ110-111-192030- Deerlodge/West Beaverhead-East Beaverhead- 230 PM MDT Fri Jul 18 2025 .TONIGHT... * Sky/Weather.........Partly cloudy. Areas of smoke in the evening. Slight chance of thunderstorms in the evening, mainly zone 111. * Min Temperature.....40-50 valleys and 50-55 ridges. * Max Humidity........62-72 percent valleys and 50-60 percent ridges. * 20-Foot Winds....... * Lower Elevation......Southwest 5-15 mph. * Ridge Top............Southwest 5-15 mph. * Mixing Height.......10 kft agl until 1900. Below 500 ft to 1 kft agl after 2100. * Transport Winds.....Southwest 20 mph until 2100, then 10 mph. * Chance Lightning....Near 0 percent in the Deerlodge/West Beaverhead...and 25 percent in the East Beaverhead. * CWR (> 0.10 Inch)...0 percent. .SATURDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....78-88 valleys and 70-75 ridges. * Min Humidity........13-23 percent. * 20-Foot Winds....... * Lower Elevation......Southwest 10-20 mph increasing to west 20-30 mph in the afternoon. * Ridge Top............Southwest 15-25 mph. * Mixing Height.......1-2 kft agl until 0900. 12 kft agl after 1400. * Transport Winds.....Southwest 15 mph until 1000. West 30 mph after 1200. * Chance Lightning....20 percent in the Deerlodge/West Beaverhead...and near 0 percent in the East Beaverhead. * CWR (> 0.10 Inch)...0 percent. .SATURDAY NIGHT... * Sky/Weather.........Partly cloudy. Areas of smoke. * Min Temperature.....45-55. * Max Humidity........65-75 percent valleys and 46-56 percent ridges. * 20-Foot Winds....... * Lower Elevation......West 15-25 mph in the evening becoming downslope/downvalley 5-10 mph. * Ridge Top............West 10-20 mph decreasing to 5-10 mph after midnight. * Mixing Height.......10 kft agl until 1900. Below 500 ft to 1 kft agl after 2100. * Transport Winds.....West 25 mph until 2100. Variable less than 10 mph after 0100. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....75-85 valleys and 70-75 ridges. * Min Humidity........14-24 percent. * 20-Foot Winds....... * Lower Elevation......Calm becoming west 10-20 mph in the afternoon. * Ridge Top............Southwest 5-10 mph becoming west 10-20 mph in the afternoon. * Mixing Height.......2 kft agl until 0900. Greater than 12 kft agl after 1400. * Transport Winds.....Southwest 10 mph until 0900. 30 mph after 1100. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .MONDAY...Mostly cloudy with slight chance of rain showers and thunderstorms. Chance of precipitation 20 percent. Lows 50-60. Highs 75-85. Min humidities 10-20 percent. West winds 10-20 mph. .TUESDAY...Partly cloudy with slight chance of rain showers and thunderstorms. Chance of precipitation 20 percent. Lows 45-55. Highs 75-85. Min humidities 15-25 percent. Northwest winds 10-20 mph. .WEDNESDAY...Mostly clear. Lows 50-60. Highs 75-85. West winds 10-15 mph. .THURSDAY...Mostly clear. Lows 50-60. Highs 80-90. .FRIDAY...Mostly clear. Lows 50-60. Highs 80-90. $$