FNUS55 KMSO 151824 FWFMSO Fire Weather Planning Forecast for Wrn Montana and N Cntrl Idaho National Weather Service Missoula MT 1224 PM MDT Thu Oct 15 2026 .DISCUSSION... Idaho (Zones 102 and 103): AUTOMATED INTERIM UPDATE. High pressure building over the region will allow for warming temperatures and drier RHs. A cold front on Saturday will improve mixing and bring gusty afternoon winds. Taking a quick look at the next 48 hours... Tonight's weather, mostly clear. Friday, partly cloudy. Humidities will be lower. Friday Night, partly cloudy. Saturday, mostly sunny. Northwest MT (Zones 104 and 105): AUTOMATED INTERIM UPDATE. High pressure building over the region will allow for warming temperatures and drier RHs. A cold front on Saturday will improve mixing and bring gusty afternoon winds. Taking a quick look at the next 48 hours... Tonight's weather, mostly clear. Widespread frost after midnight. Friday, partly cloudy. Widespread frost in the morning. It'll be not as cool. Humidities will be lower. Friday Night, partly cloudy. Saturday, mostly sunny. West Central MT (Zones 106, 107 and 108): AUTOMATED INTERIM UPDATE. High pressure building over the region will allow for warming temperatures and drier RHs. A cold front on Saturday will improve mixing and bring gusty afternoon winds. Taking a quick look at the next 48 hours... Tonight's weather, mostly clear. Widespread frost after midnight. Friday, partly cloudy. Widespread frost in the morning. It'll be not as cool. Humidities will be lower. Friday Night, partly cloudy. Saturday, partly cloudy. Southwest MT (Zones 109, 110 and 111): AUTOMATED INTERIM UPDATE. High pressure building over the region will allow for warming temperatures and drier RHs. A cold front on Saturday will improve mixing and bring gusty afternoon winds. Taking a quick look at the next 48 hours... Tonight's weather, mostly clear. Friday, mostly sunny. It'll be not as cool. Humidities will be lower. Friday Night, partly cloudy. Saturday, partly cloudy. View Weather Briefing videos on our YouTube channel at https://www.youtube.com/NWSMissoula IDZ102-103-161000- Palouse/Hells Canyon-Clearwater/Nez Perce- 1124 AM PDT Thu Oct 15 2026 .TONIGHT... * Sky/Weather.........Mostly clear. * Min Temperature.....35-40. * Max Humidity........58-68 percent. * 20-Foot Winds....... * Lower Elevation......East 5-15 mph. * Ridge Top............Southeast 10-15 mph becoming south 10-20 mph after midnight. * Mixing Height.......Below 500 ft to 1 kft agl. * Transport Winds.....Southeast 10 mph until 0400, then 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .FRIDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....70-80 valleys and 60-65 ridges. * Min Humidity........17-27 percent. * 20-Foot Winds....... * Lower Elevation......South 5-15 mph. * Ridge Top............South 10-20 mph becoming southwest 10-15 mph in the afternoon. * Mixing Height.......1-2 kft agl until 1300, then 3 kft agl. * Transport Winds.....South 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .FRIDAY NIGHT... * Sky/Weather.........Partly cloudy. * Min Temperature.....40-50 valleys and 33-43 ridges. * Max Humidity........58-68 percent valleys and 51-61 percent ridges. * 20-Foot Winds....... * Lower Elevation......Southeast 5-15 mph. * Ridge Top............Southeast 10-20 mph. * Mixing Height.......Below 500 ft to 1 kft agl. * Transport Winds.....South 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .SATURDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....68-78 valleys and 55-65 ridges. * Min Humidity........22-32 percent. * 20-Foot Winds....... * Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in the afternoon. * Ridge Top............South 10-20 mph becoming west 5-15 mph in the afternoon. * Mixing Height.......Below 500 ft to 1 kft agl until 1100. 6 kft agl after 1500. * Transport Winds.....South 15 mph until 1300, then west 20 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY...Mostly clear. Lows 35-45. Highs 60-70. Min humidities 30-40 percent. Northwest winds 10-15 mph. .MONDAY...Partly cloudy. Lows 40-50. Highs 60-70. Min humidities 35-45 percent. Southeast winds 5-10 mph. .TUESDAY...Mostly cloudy. Lows 40-50. Highs 55-65. Variable winds up to 10 mph. .WEDNESDAY...Partly cloudy with slight chance of rain. Chance of rain 20 percent. Lows 35-45. Highs 55-65. .THURSDAY...Partly cloudy with chance of rain. Chance of rain 30 percent. Lows 40-50. Highs 50-60. $$ MTZ104-105-161000- Kootenai-Flathead/Glacier Park- 1224 PM MDT Thu Oct 15 2026 .TONIGHT... * Sky/Weather.........Partly cloudy. Widespread frost after midnight. * Min Temperature.....30-35. * Max Humidity........90-100 percent valleys and 67-77 percent ridges. * 20-Foot Winds....... * Lower Elevation......South 10-15 mph. * Ridge Top............South 10-15 mph. * Mixing Height.......Below 500 ft to 1 kft agl. * Transport Winds.....South 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .FRIDAY... * Sky/Weather.........Partly cloudy. Widespread frost in the morning. * Max Temperature.....60-70 valleys and 50-55 ridges. * Min Humidity........24-34 percent valleys and 30-40 percent ridges. * 20-Foot Winds....... * Lower Elevation......South 10-15 mph. * Ridge Top............South 10-15 mph. * Mixing Height.......1-2 kft agl until 1400, then 3 kft agl. * Transport Winds.....South 15 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .FRIDAY NIGHT... * Sky/Weather.........Partly cloudy. * Min Temperature.....35-40. * Max Humidity........81-91 percent valleys and 51-61 percent ridges. * 20-Foot Winds....... * Lower Elevation......South 10-20 mph. * Ridge Top............South 10-20 mph. * Mixing Height.......Below 500 ft to 1 kft agl. * Transport Winds.....South 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .SATURDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....65-70 valleys and 45-55 ridges. * Min Humidity........23-33 percent valleys and 31-41 percent ridges. * 20-Foot Winds....... * Lower Elevation......Calm to becoming southwest 10-20 mph in the afternoon. * Ridge Top............Southwest 15-25 mph increasing to 25-35 mph in the afternoon. * Mixing Height.......Below 500 ft to 1 kft agl until 1100. 7 kft agl after 1500. * Transport Winds.....South 15 mph until 1100. Southwest 30 mph after 1300. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY...Cooler. Mostly clear. Lows 35-45. Highs 50-60. Min humidities 35-45 percent. Southwest winds 25-35 mph. .MONDAY...Partly cloudy. Lows 35-45. Highs 55-65. Min humidities 45-55 percent. Diurnal terrain winds to 10 mph. .TUESDAY...Mostly cloudy. Lows 35-45. Highs 50-60. Variable winds up to 10 mph. .WEDNESDAY...Partly cloudy. Lows 35-45. Highs 50-60. .THURSDAY...Partly cloudy with slight chance of rain. Chance of rain 20 percent. Lows 35-45. Highs 50-60. $$ MTZ106-108-161000- West Lolo-East Lolo- 1224 PM MDT Thu Oct 15 2026 .TONIGHT... * Sky/Weather.........Mostly clear. Widespread frost after midnight. * Min Temperature.....30-35. * Max Humidity........71-81 percent. * 20-Foot Winds....... * Lower Elevation......Southeast 5-10 mph. * Ridge Top............South 5-10 mph becoming 5-15 mph after midnight. * Mixing Height.......Below 500 ft to 1 kft agl. * Transport Winds.....Southeast 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .FRIDAY... * Sky/Weather.........Partly cloudy. Widespread frost in the morning. * Max Temperature.....63-73 valleys and 53-63 ridges. * Min Humidity........20-30 percent. * 20-Foot Winds....... * Lower Elevation......Calm to variable less than 7 mph. * Ridge Top............South 5-10 mph. * Mixing Height.......1-2 kft agl until 1300, then 3 kft agl. * Transport Winds.....South 10 mph until 1500, then southwest 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .FRIDAY NIGHT... * Sky/Weather.........Partly cloudy. * Min Temperature.....28-38 valleys and 35-45 ridges. * Max Humidity........65-75 percent valleys and 53-63 percent ridges. * 20-Foot Winds....... * Lower Elevation......South 10-15 mph. * Ridge Top............South 10-15 mph. * Mixing Height.......Below 500 ft to 1 kft agl. * Transport Winds.....South 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .SATURDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....55-65. * Min Humidity........20-30 percent. * 20-Foot Winds....... * Lower Elevation......Calm to becoming southwest 10-20 mph in the afternoon. * Ridge Top............Southwest 15-25 mph. * Mixing Height.......Below 500 ft to 1 kft agl until 1100. 6 kft agl after 1300. * Transport Winds.....Southwest 15 mph until 1200, then west 25 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY...Mostly clear. Lows 35-45. Highs 55-65. Min humidities 35-45 percent. West winds 10-20 mph. .MONDAY...Partly cloudy. Lows 35-45. Highs 60-70. Min humidities 35-45 percent. Diurnal terrain winds to 10 mph. .TUESDAY...Partly cloudy. Lows 40-50. Highs 55-65. Variable winds up to 10 mph. .WEDNESDAY...Partly cloudy with slight chance of rain. Chance of rain 20 percent. Lows 35-45. Highs 50-60. .THURSDAY...Partly cloudy with slight chance of rain. Chance of rain 20 percent. Lows 35-45. Highs 50-60. $$ MTZ107-161000- Flathead Reservation- 1224 PM MDT Thu Oct 15 2026 .TONIGHT... * Sky/Weather.........Mostly clear. Areas of frost after midnight. * Min Temperature.....30-40. * Max Humidity........91-100 percent valleys and 78-88 percent ridges. * 20-Foot Winds....... * Lower Elevation......Southeast 10-15 mph. * Ridge Top............South 10-20 mph in the evening. * Mixing Height.......Below 500 ft to 1 kft agl. * Transport Winds.....Variable less than 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .FRIDAY... * Sky/Weather.........Partly cloudy. Widespread frost in the morning. * Max Temperature.....60-65 valleys and 45-50 ridges. * Min Humidity........22-32 percent. * 20-Foot Winds....... * Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in the afternoon. * Ridge Top............Southwest 10-20 mph decreasing to 5-10 mph in the afternoon. * Mixing Height.......1-2 kft agl until 1400, then 2 kft agl. * Transport Winds.....South 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .FRIDAY NIGHT... * Sky/Weather.........Partly cloudy. * Min Temperature.....33-43. * Max Humidity........76-86 percent valleys and 53-63 percent ridges. * 20-Foot Winds....... * Lower Elevation......Downslope/downvalley 1-3 mph. * Ridge Top............South 15-25 mph. * Mixing Height.......Below 500 ft to 1 kft agl. * Transport Winds.....South 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .SATURDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....70-75 valleys and 50-55 ridges. * Min Humidity........21-31 percent. * 20-Foot Winds....... * Lower Elevation......Calm to becoming southwest 10-20 mph in the afternoon. * Ridge Top............South 20-30 mph becoming west 25-35 mph in the afternoon. * Mixing Height.......Below 500 ft to 1 kft agl until 1100. 7 kft agl after 1500. * Transport Winds.....Southwest 15 mph until 1300, then 25 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY...Cooler. Mostly clear. Lows 35-45. Highs 55-65. Min humidities 40-50 percent. Southwest winds 10-20 mph. .MONDAY...Partly cloudy. Lows 35-45. Highs 60-70. Min humidities 45-55 percent. East winds 5-10 mph. .TUESDAY...Mostly cloudy. Lows 40-50. Highs 55-65. Variable winds up to 10 mph. .WEDNESDAY...Partly cloudy with slight chance of rain. Chance of rain 20 percent. Lows 40-50. Highs 55-65. .THURSDAY...Partly cloudy with slight chance of rain. Chance of rain 20 percent. Lows 40-50. Highs 50-60. $$ MTZ109-161000- Bitterroot- 1224 PM MDT Thu Oct 15 2026 .TONIGHT... * Sky/Weather.........Mostly clear. * Min Temperature.....30-35. * Max Humidity........81-91 percent valleys and 65-75 percent ridges. * 20-Foot Winds....... * Lower Elevation......Southeast 5-15 mph. * Ridge Top............Southeast 5-15 mph. * Mixing Height.......Below 500 ft to 1 kft agl. * Transport Winds.....Variable less than 10 mph until 2200, then south 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .FRIDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....70-75 valleys and 55-60 ridges. * Min Humidity........17-27 percent. * 20-Foot Winds....... * Lower Elevation......South 5-15 mph. * Ridge Top............South 5-15 mph. * Mixing Height.......Below 500 ft to 1 kft agl until 1300, then 3 kft agl. * Transport Winds.....South 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .FRIDAY NIGHT... * Sky/Weather.........Partly cloudy. * Min Temperature.....35-40. * Max Humidity........64-74 percent valleys and 48-58 percent ridges. * 20-Foot Winds....... * Lower Elevation......South 10-20 mph. * Ridge Top............South 10-20 mph. * Mixing Height.......Below 500 ft to 1 kft agl. * Transport Winds.....South 10 mph until 2400, then 15 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .SATURDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....70-75 valleys and 55-60 ridges. * Min Humidity........18-28 percent. * 20-Foot Winds....... * Lower Elevation......Southwest 10-20 mph. * Ridge Top............Southwest 10-20 mph. * Mixing Height.......Below 500 ft to 1 kft agl until 1100, then 3 kft agl until 1300, then 6 kft agl until 1500, then 7 kft agl until 1700, then 4 kft agl. * Transport Winds.....Southwest 20 mph until 1700, then west 15 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY...Cooler. Partly cloudy. Lows 35-45. Highs 55-65. Min humidities 30-40 percent. Southwest winds 5-10 mph. .MONDAY...Mostly clear. Lows 35-45. Highs 60-70. Min humidities 30-40 percent. South winds 10-15 mph. .TUESDAY...Cooler. Partly cloudy with slight chance of rain. Chance of rain 20 percent. Lows 40-50. Highs 50-60. Southeast winds 5-10 mph. .WEDNESDAY...Mostly cloudy with slight chance of rain. Chance of rain 20 percent. Lows 35-45. Highs 50-60. .THURSDAY...Partly cloudy with chance of rain and snow. Chance of precipitation 30 percent. Lows 35-45. Highs 45-55. $$ MTZ110-111-161000- Deerlodge/West Beaverhead-East Beaverhead- 1224 PM MDT Thu Oct 15 2026 .TONIGHT... * Sky/Weather.........Mostly clear. * Min Temperature.....25-30. * Max Humidity........85-95 percent valleys and 68-78 percent ridges. * 20-Foot Winds....... * Lower Elevation......South 5-15 mph. * Ridge Top............South 5-15 mph. * Mixing Height.......Below 500 ft to 1 kft agl. * Transport Winds.....Variable less than 10 mph until 2200, then south 10 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .FRIDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....50-60. * Min Humidity........18-28 percent. * 20-Foot Winds....... * Lower Elevation......South 5-15 mph. * Ridge Top............South 5-15 mph. * Mixing Height.......1-2 kft agl until 1400, then 2 kft agl. * Transport Winds.....Southwest 15 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .FRIDAY NIGHT... * Sky/Weather.........Partly cloudy. * Min Temperature.....23-33 valleys and 30-40 ridges. * Max Humidity........69-79 percent valleys and 54-64 percent ridges. * 20-Foot Winds....... * Lower Elevation......South 15-25 mph. * Ridge Top............South 15-25 mph. * Mixing Height.......Below 500 ft to 1 kft agl. * Transport Winds.....South 15 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .SATURDAY... * Sky/Weather.........Partly cloudy. * Max Temperature.....60-65 valleys and 50-60 ridges. * Min Humidity........11-21 percent valleys and 20-30 percent ridges. * 20-Foot Winds....... * Lower Elevation......South 20-30 mph. * Ridge Top............Southwest 20-30 mph. * Mixing Height.......1-2 kft agl until 1200, then 4 kft agl until 1400, then 5 kft agl until 1700, then 3 kft agl. * Transport Winds.....Southwest 20 mph. * Chance Lightning....0 percent. * CWR (> 0.10 Inch)...0 percent. .SUNDAY...Mostly clear. Lows 30-40. Highs 55-65. Min humidities 30-40 percent. Southwest winds 10-20 mph. .MONDAY...Mostly clear. Lows 35-45. Highs 55-65. Min humidities 30-40 percent. South winds 10-20 mph. .TUESDAY...Partly cloudy with slight chance of rain. Chance of rain 20 percent. Lows 35-45. Highs 50-60. South winds 10-20 mph. .WEDNESDAY...Partly cloudy with chance of rain. Chance of rain 30 percent. Lows 35-45. Highs 50-60. .THURSDAY...Partly cloudy with chance of rain and snow. Chance of precipitation 30 percent. Lows 35-45. Highs 45-55. $$