843 FNUS55 KMSO 270743 FWFMSO Fire Weather Planning Forecast for Wrn Montana and N Cntrl Idaho National Weather Service Missoula MT 143 AM MDT Wed Aug 27 2025 .DISCUSSION... Idaho (Zones 102 and 103): Humidity will trend higher today and Thursday as monsoon moisture moves in, with increasing chances for showers and thunderstorms capable of producing wetting rains. Watch for gusty outflow winds near any thunderstorms today. Thunderstorms will be slow moving and heavy at times with a potential for debris flows near burn scars. Northwest MT (Zones 104 and 105): Hot and dry through today with easterly winds. Thermal belts with poor overnight Rh recoveries on the terrain through tomorrow morning. Isolated storm chances begin Wednesday afternoon but more likely tomorrow and Friday. Higher humidity and wetting rain chances Thursday into Friday. West Central MT (Zones 106, 107 and 108): Higher humidity and wetting rain chances later today into Thursday as monsoon moisture slowly spreads northward. Watch for gusty outflow winds with thunderstorms late today. Thunderstorms will be slow moving and heavy at times with a potential for debris flows near burn scars. Southwest MT (Zones 109, 110 and 111): Watch for gusty outflow winds near thunderstorms today. Thunderstorms will also be slow moving and heavy at times with a potential for debris flows near burn scars today and tomorrow. IDZ102-103-280745- Palouse/Hells Canyon-Clearwater/Nez Perce- 1243 AM PDT Wed Aug 27 2025 .TODAY... * Sky/Weather.........Mostly cloudy. Haze in the morning. Areas of smoke. Rain showers and chance of thunderstorms. * Max Temperature.....75-85 valleys and 65-75 ridges. * Min Humidity........43-53 percent. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............Southeast up to 5 mph. * Mixing Height.......3 kft agl until 1200, then 4 kft agl. * Transport Winds.....Southeast 10 mph until 1400, then northeast 10 mph. * Chance Lightning....30 percent in the Palouse/Hells Canyon...and 40 percent in the Clearwater/Nez Perce. * CWR (> 0.10 Inch)...30 percent in the Palouse/Hells Canyon...and 70 percent in the Clearwater/Nez Perce. .TONIGHT... * Sky/Weather.........Mostly cloudy. Areas of smoke. Slight chance of thunderstorms in the evening. Rain showers. * Min Temperature.....55-60 valleys and 48-58 ridges. * Max Humidity........72-82 percent. * 20-Foot Winds....... * Lower Elevation......Variable less than 5 mph. * Ridge Top............South up to 5 mph. * Mixing Height.......Below 500 ft to 1 kft agl. * Transport Winds.....North 10 mph until 2200, then variable less than 10 mph. * Chance Lightning....25 percent in the Palouse/Hells Canyon...and 30 percent in the Clearwater/Nez Perce. * CWR (> 0.10 Inch)...40 percent in the Palouse/Hells Canyon...and 60 percent in the Clearwater/Nez Perce. .THURSDAY... * Sky/Weather.........Mostly cloudy. Rain showers likely. Chance of thunderstorms in the afternoon. * Max Temperature.....78-88 valleys and 60-70 ridges. * Min Humidity........42-52 percent valleys and 55-65 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............West 5-10 mph. * Mixing Height.......2 kft agl until 1100. 7 kft agl after 1600. * Transport Winds.....West 10 mph until 1700, then 10 mph. * Chance Lightning....25 percent in the Palouse/Hells Canyon...and 30 percent in the Clearwater/Nez Perce. * CWR (> 0.10 Inch)...20 percent in the Palouse/Hells Canyon...and 50 percent in the Clearwater/Nez Perce. .FRIDAY...Partly cloudy with slight chance of rain. Chance of rain 20 percent. Lows 55-65. Highs 80-90. Min humidities 20-30 percent. Diurnal terrain winds to 10 mph. .SATURDAY...Mostly clear. Lows 55-65. Highs 85-95. Min humidities 10-20 percent. Southeast winds 5-10 mph. .SUNDAY...Mostly clear. Lows 55-65. Highs 80-90. Southeast winds 5-10 mph. .LABOR DAY...Partly cloudy. Lows 55-65. Highs 80-90. .TUESDAY...Partly cloudy. Lows 55-65. Highs 80-90. $$ MTZ104-105-280745- Kootenai-Flathead/Glacier Park- 143 AM MDT Wed Aug 27 2025 .TODAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....90-95 valleys and 70-80 ridges. * Min Humidity........9-19 percent valleys and 20-30 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in the afternoon. * Ridge Top............East 5-15 mph. * Mixing Height.......3 kft agl until 1100. 11 kft agl after 1500. * Transport Winds.....East 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .TONIGHT... * Sky/Weather.........Mostly cloudy. Slight chance of rain. * Min Temperature.....50-60. * Max Humidity........64-74 percent valleys and 45-55 percent ridges. * 20-Foot Winds....... * Lower Elevation......East 5-10 mph. * Ridge Top............East 10-15 mph. * Mixing Height.......8 kft agl until 1900. 1-2 kft agl after 2000. * Transport Winds.....Southeast 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...0 percent. .THURSDAY... * Sky/Weather.........Mostly cloudy. Chance of rain. * Max Temperature.....75-85 valleys and 60-70 ridges. * Min Humidity........35-45 percent valleys and 42-52 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............Southeast 5-10 mph becoming southwest in the afternoon. * Mixing Height.......3 kft agl until 1200, then 4 kft agl. * Transport Winds.....Variable less than 10 mph. * Chance Lightning....20 percent in the Kootenai...and near 0 percent in the Flathead/Glacier Park. * CWR (> 0.10 Inch)...10 percent. .FRIDAY...Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Chance of precipitation 30 percent. Lows 55-65. Highs 70-80. Min humidities 30-40 percent. Southwest winds 5-10 mph. .SATURDAY...Partly cloudy. Lows 50-60. Highs 75-85. Min humidities 15-25 percent. South winds 5-10 mph. .SUNDAY...Partly cloudy. Lows 55-65. Highs 80-90. South winds 5-10 mph. .LABOR DAY...Partly cloudy with slight chance of rain. Chance of rain 20 percent. Lows 55-65. Highs 75-85. .TUESDAY...Partly cloudy with slight chance of rain. Chance of rain 20 percent. Lows 50-60. Highs 75-85. $$ MTZ106-108-280745- West Lolo-East Lolo- 143 AM MDT Wed Aug 27 2025 .TODAY... * Sky/Weather.........Mostly cloudy. Areas of smoke in the morning. Chance of rain. * Max Temperature.....83-93 valleys and 70-80 ridges. * Min Humidity........17-27 percent valleys and 29-39 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............Southeast 5-10 mph. * Mixing Height.......1-2 kft agl until 1000, then 3 kft agl until 1100, then 5 kft agl until 1200, then 6 kft agl until 1300, then 9 kft agl until 1700, then 8 kft agl. * Transport Winds.....East 10 mph until 1200, then southeast 15 mph. * Chance Lightning....15 percent in the West Lolo...and 20 percent in the East Lolo. * CWR (> 0.10 Inch)...10 percent. .TONIGHT... * Sky/Weather.........Mostly cloudy. Chance of rain. * Min Temperature.....50-60. * Max Humidity........67-77 percent. * 20-Foot Winds....... * Lower Elevation......Southeast 5-10 mph. * Ridge Top............Southeast 5-10 mph. * Mixing Height.......6 kft agl until 1900. Below 500 ft to 1 kft agl after 2000. * Transport Winds.....Southeast 15 mph until 0200, then variable less than 10 mph. * Chance Lightning....15 percent in the West Lolo...and 20 percent in the East Lolo. * CWR (> 0.10 Inch)...20 percent. .THURSDAY... * Sky/Weather.........Mostly cloudy. Chance of rain in the morning, then rain showers likely and slight chance of thunderstorms in the afternoon. * Max Temperature.....70-80 valleys and 63-73 ridges. * Min Humidity........45-55 percent valleys and 57-67 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............Southwest up to 5 mph. * Mixing Height.......3 kft agl until 1200. 5 kft agl after 1500. * Transport Winds.....Variable less than 10 mph until 1100, then west 10 mph. * Chance Lightning....25 percent in the West Lolo...and 30 percent in the East Lolo. * CWR (> 0.10 Inch)...50 percent. .FRIDAY...Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Chance of precipitation 30 percent. Lows 55-65. Highs 70-80. Min humidities 30-40 percent. Variable winds up to 10 mph. .SATURDAY...Partly cloudy. Lows 50-60. Highs 80-90. Min humidities 15-25 percent. Diurnal terrain winds to 10 mph. .SUNDAY...Mostly clear. Lows 55-65. Highs 80-90. South winds 5-10 mph. .LABOR DAY...Partly cloudy. Lows 55-65. Highs 80-90. .TUESDAY...Partly cloudy. Lows 50-60. Highs 75-85. $$ MTZ107-280745- Flathead Reservation- 143 AM MDT Wed Aug 27 2025 .TODAY... * Sky/Weather.........Mostly cloudy. Areas of smoke in the morning. * Max Temperature.....90-95 valleys and 65-70 ridges. * Min Humidity........18-28 percent valleys and 24-34 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............Southeast 5-15 mph. * Mixing Height.......2 kft agl until 1100. 10 kft agl after 1500. * Transport Winds.....Variable less than 10 mph until 1100, then southeast 15 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...10 percent. .TONIGHT... * Sky/Weather.........Mostly cloudy. Slight chance of rain. * Min Temperature.....55-60. * Max Humidity........63-73 percent valleys and 87-97 percent ridges. * 20-Foot Winds....... * Lower Elevation......South 5-10 mph becoming variable less than 5 mph after midnight. * Ridge Top............Southeast 5-15 mph. * Mixing Height.......7 kft agl until 1900. Below 500 ft to 1 kft agl after 2000. * Transport Winds.....Southeast 15 mph until 0300, then variable less than 10 mph. * Chance Lightning....Near 0 percent. * CWR (> 0.10 Inch)...10 percent. .THURSDAY... * Sky/Weather.........Mostly cloudy. Chance of rain in the morning, then chance of rain showers and slight chance of thunderstorms in the afternoon. * Max Temperature.....75-80 valleys and 55-60 ridges. * Min Humidity........50-60 percent valleys and 66-76 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............South 5-10 mph becoming west up to 5 mph in the afternoon. * Mixing Height.......2 kft agl until 1200, then 4 kft agl. * Transport Winds.....Variable less than 10 mph. * Chance Lightning....20 percent. * CWR (> 0.10 Inch)...30 percent. .FRIDAY...Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Chance of precipitation 30 percent. Lows 55-65. Highs 75-85. Min humidities 35-45 percent. Variable winds up to 10 mph. .SATURDAY...Partly cloudy. Lows 55-65. Highs 80-90. Min humidities 15-25 percent. Southeast winds 5-10 mph. .SUNDAY...Mostly clear. Lows 55-65. Highs 85-95. East winds 5-10 mph. .LABOR DAY...Partly cloudy with slight chance of rain. Chance of rain 20 percent. Lows 55-65. Highs 80-90. .TUESDAY...Partly cloudy. Lows 55-65. Highs 80-90. $$ MTZ109-280745- Bitterroot- 143 AM MDT Wed Aug 27 2025 .TODAY... * Sky/Weather.........Cloudy. Rain showers and chance of thunderstorms. * Max Temperature.....70-80 valleys and 60-65 ridges. * Min Humidity........55-65 percent valleys and 63-73 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............East 5-10 mph. * Mixing Height.......3 kft agl until 1200, then 4 kft agl. * Transport Winds.....Southeast 10 mph until 1200, then east 15 mph. * Chance Lightning....40 percent in the Darby, Sula, and West Fork Districts...and 25 percent in areas north of Hamilton. * CWR (> 0.10 Inch)...80 percent in the Darby, Sula, and West Fork Districts...and 30 percent in areas north of Hamilton. .TONIGHT... * Sky/Weather.........Mostly cloudy. Areas of smoke. Rain showers likely and slight chance of thunderstorms in the evening. Rain likely after midnight. * Min Temperature.....50-55. * Max Humidity........89-99 percent valleys and 87-93 percent ridges. * 20-Foot Winds....... * Lower Elevation......Variable less than 5 mph. * Ridge Top............East 5-10 mph becoming south after midnight. * Mixing Height.......1-2 kft agl. * Transport Winds.....Southeast 10 mph until 2400. Variable less than 10 mph after 0500. * Chance Lightning....30 percent in the Darby, Sula, and West Fork Districts...and 20 percent in areas north of Hamilton. * CWR (> 0.10 Inch)...60 percent in the Darby, Sula, and West Fork Districts...and 30 percent in areas north of Hamilton. .THURSDAY... * Sky/Weather.........Mostly cloudy. Rain showers likely and chance of thunderstorms. * Max Temperature.....75-80 valleys and 60-65 ridges. * Min Humidity........52-62 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. 6 kft agl after 1300. * Transport Winds.....Southwest 10 mph until 1300, then west 15 mph. * Chance Lightning....40 percent in the Darby, Sula, and West Fork Districts...and 30 percent in areas north of Hamilton. * CWR (> 0.10 Inch)...60 percent. .FRIDAY...Partly cloudy with chance of rain and slight chance of thunderstorms. Chance of precipitation 30 percent. Lows 50-60. Highs 70-80. Min humidities 25-35 percent. Southwest winds 5-10 mph. .SATURDAY...Mostly clear. Lows 50-60. Highs 75-85. Min humidities 15-25 percent. Southwest winds 5-10 mph. .SUNDAY...Mostly clear. Lows 50-60. Highs 75-85. South winds 5-10 mph. .LABOR DAY...Partly cloudy with slight chance of rain. Chance of rain 20 percent. Lows 50-60. Highs 75-85. .TUESDAY...Partly cloudy with slight chance of rain. Chance of rain 20 percent. Lows 50-60. Highs 75-85. $$ MTZ110-111-280745- Deerlodge/West Beaverhead-East Beaverhead- 143 AM MDT Wed Aug 27 2025 .TODAY... * Sky/Weather.........Mostly cloudy. Rain showers. Slight chance of thunderstorms in the afternoon. * Max Temperature.....65-70 valleys and 55-65 ridges. * Min Humidity........53-63 percent valleys and 60-70 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............East 5-10 mph. * Mixing Height.......2 kft agl until 1100, then 4 kft agl. * Transport Winds.....East 10 mph until 1100, then 15 mph. * Chance Lightning....25 percent in the Deerlodge/West Beaverhead...and 40 percent in the East Beaverhead. * CWR (> 0.10 Inch)...50 percent in the Deerlodge/West Beaverhead...and 70 percent in the East Beaverhead. .TONIGHT... * Sky/Weather.........Mostly cloudy. Haze in the evening. Rain showers and slight chance of thunderstorms. * Min Temperature.....45-55. * Max Humidity........100 percent valleys and 86-96 percent ridges. * 20-Foot Winds....... * Lower Elevation......Northeast 5-10 mph becoming variable less than 5 mph after midnight. * Ridge Top............East 5-10 mph becoming south after midnight. * Mixing Height.......Below 500 ft to 1 kft agl. * Transport Winds.....Southeast 10 mph until 0200, then variable less than 10 mph. * Chance Lightning....25 percent in the Deerlodge/West Beaverhead...and 40 percent in the East Beaverhead. * CWR (> 0.10 Inch)...50 percent. .THURSDAY... * Sky/Weather.........Mostly cloudy. Rain showers and chance of thunderstorms. * Max Temperature.....65-70 valleys and 55-65 ridges. * Min Humidity........49-59 percent valleys and 57-67 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............West 5-10 mph. * Mixing Height.......3 kft agl until 1100. 7 kft agl after 1300. * Transport Winds.....Southwest 10 mph until 1300, then west 15 mph. * Chance Lightning....40 percent in the Deerlodge/West Beaverhead...and 25 percent in the East Beaverhead. * CWR (> 0.10 Inch)...70 percent. .FRIDAY...Partly cloudy with chance of rain showers and slight chance of thunderstorms. Chance of precipitation 30 percent. Lows 45-55. Highs 65-75. Min humidities 30-40 percent. West winds 5-10 mph. .SATURDAY...Partly cloudy with slight chance of rain showers and thunderstorms. Chance of precipitation 20 percent. Lows 45-55. Highs 70-80. Min humidities 15-25 percent. West winds 5-10 mph. .SUNDAY...Mostly clear. Lows 50-60. Highs 75-85. South winds 5-10 mph. .LABOR DAY...Partly cloudy with slight chance of rain showers. Chance of showers 20 percent. Lows 50-60. Highs 75-85. .TUESDAY...Partly cloudy with chance of rain showers. Chance of showers 30 percent. Lows 50-60. Highs 70-80. $$