Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Missoula, MT
Issued by NWS Missoula, MT
777
FNUS55 KMSO 310914
FWFMSO
Fire Weather Planning Forecast for Wrn Montana and N Cntrl Idaho
National Weather Service Missoula MT
314 AM MDT Sun Aug 31 2025
.DISCUSSION...
Idaho (Zones 102 and 103): Warming and drying will accelerate through
early next week as a strong ridge of high pressure builds. Expect
nighttime thermal belts to strengthen with poor RH recoveries on
midslopes and ridges. Easterly winds are expected to develop this
evening and will likely persist for much of the week. Smoke from
regional wildfires will gradually increase.
Northwest MT (Zones 104 and 105): Warming and drying will accelerate through
early next week as a strong ridge of high pressure builds. Expect
nighttime thermal belts to strengthen with poor RH recoveries on
midslopes and ridges. Easterly winds are expected to develop this
evening and will likely persist for much of the week. Smoke from
regional wildfires will gradually increase.
West Central MT (Zones 106, 107 and 108): Warming and drying will accelerate through
early next week as a strong ridge of high pressure builds. Expect
nighttime thermal belts to strengthen with poor RH recoveries on
midslopes and ridges. Easterly winds are expected to develop this
evening and will likely persist for much of the week. Smoke from
regional wildfires will gradually increase.
Southwest MT (Zones 109, 110 and 111): Warming and drying will accelerate through
early next week as a strong ridge of high pressure builds. Expect
nighttime thermal belts to strengthen with poor RH recoveries on
midslopes and ridges. Easterly winds are expected to develop this
evening and will likely persist for much of the week. Smoke from
regional wildfires will gradually increase.
View Weather Briefing videos on our YouTube channel
at https://www.youtube.com/NWSMissoula
IDZ102-103-010915-
Palouse/Hells Canyon-Clearwater/Nez Perce-
214 AM PDT Sun Aug 31 2025
.TODAY...
* Sky/Weather.........Partly cloudy. Haze.
* Max Temperature.....93-103 valleys and 75-85 ridges.
* Min Humidity........10-20 percent.
* 20-Foot Winds.......
* Lower Elevation......Calm to variable less than 7 mph.
* Ridge Top............Southeast 5-10 mph.
* Mixing Height.......2 kft agl until 1100. Greater than 12 kft agl
after 1600.
* Transport Winds.....Southeast 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.TONIGHT...
* Sky/Weather.........Partly cloudy.
* Min Temperature.....55-65.
* Max Humidity........45-55 percent valleys and 31-41 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......East 5-15 mph.
* Ridge Top............East 5-15 mph.
* Mixing Height.......10 kft agl until 1900. Below 500 ft to 1 kft
agl after 2100.
* Transport Winds.....Southeast 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.LABOR DAY...
* Sky/Weather.........Partly cloudy.
* Max Temperature.....95-105 valleys and 80-90 ridges.
* Min Humidity........10-20 percent.
* 20-Foot Winds.......
* Lower Elevation......Calm to variable less than 7 mph.
* Ridge Top............Southeast 5-10 mph.
* Mixing Height.......2 kft agl until 1100. Greater than 12 kft agl
after 1500.
* Transport Winds.....Southeast 10 mph until 1500, then south 10
mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.TUESDAY...Mostly clear. Lows 60-70. Highs 90-100. Min humidities
15-25 percent. East winds 5-10 mph.
.WEDNESDAY...Mostly clear. Lows 60-70. Highs 90-100. Min humidities
15-25 percent. East winds 5-10 mph.
.THURSDAY...Mostly clear. Lows 60-70. Highs 85-95. South winds
5-10 mph.
.FRIDAY...Partly cloudy. Lows 60-70. Highs 85-95.
.SATURDAY...Partly cloudy with slight chance of rain. Chance of rain
20 percent. Lows 60-70. Highs 80-90.
$$
MTZ104-105-010915-
Kootenai-Flathead/Glacier Park-
314 AM MDT Sun Aug 31 2025
.TODAY...
* Sky/Weather.........Partly cloudy. Haze.
* Max Temperature.....85-95 valleys and 70-80 ridges.
* Min Humidity........11-19 percent valleys and 22-32 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.......2 kft agl until 1100. 11 kft agl after 1400.
* Transport Winds.....Variable less than 10 mph until 1200, then
west 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.TONIGHT...
* Sky/Weather.........Partly cloudy. Haze. Slight chance of rain.
* Min Temperature.....55-60.
* Max Humidity........61-71 percent valleys and 40-50 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Northeast 5-15 mph.
* Ridge Top............East 5-15 mph.
* Mixing Height.......8 kft agl until 1900. Below 500 ft to 1 kft
agl after 2000.
* Transport Winds.....Variable less than 10 mph until 1900, then
east 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.LABOR DAY...
* Sky/Weather.........Partly cloudy. Haze.
* Max Temperature.....90-100 valleys and 75-85 ridges.
* Min Humidity........11-19 percent valleys and 22-32 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 10 mph until 1400, then variable less
than 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.TUESDAY...Mostly clear. Lows 60-70. Highs 85-95. Min humidities
15-25 percent. Northeast winds 5-10 mph.
.WEDNESDAY...Mostly clear. Lows 55-65. Highs 85-95. Min humidities
15-25 percent. Northeast winds 10-15 mph.
.THURSDAY...Mostly clear. Lows 55-65. Highs 80-90. Northeast winds
5-10 mph.
.FRIDAY...Partly cloudy. Lows 55-65. Highs 80-90.
.SATURDAY...Partly cloudy. Lows 55-65. Highs 75-85.
$$
MTZ106-108-010915-
West Lolo-East Lolo-
314 AM MDT Sun Aug 31 2025
.TODAY...
* Sky/Weather.........Partly cloudy. Haze.
* Max Temperature.....85-95 valleys and 78-88 ridges.
* Min Humidity........10-16 percent valleys and 13-23 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Calm to variable less than 7 mph.
* Ridge Top............South 5-10 mph becoming west in the
afternoon.
* Mixing Height.......2 kft agl until 1100. 12 kft agl after 1400.
* Transport Winds.....Variable less than 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.TONIGHT...
* Sky/Weather.........Partly cloudy. Haze after midnight.
* Min Temperature.....50-60.
* Max Humidity........48-58 percent valleys and 35-45 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......East 5-15 mph.
* Ridge Top............East 5-15 mph.
* Mixing Height.......9 kft agl until 1900. Below 500 ft to 1 kft
agl after 2000.
* Transport Winds.....East 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.LABOR DAY...
* Sky/Weather.........Partly cloudy. Haze.
* Max Temperature.....88-98 valleys and 80-90 ridges.
* Min Humidity........10-16 percent valleys and 13-23 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 until
1200, then 6 kft agl until 1300, then 8 kft agl until 1400, then
10 kft agl until 1500, then greater than 12 kft agl until 1700,
then 11 kft agl.
* Transport Winds.....Southeast 10 mph until 1500, then variable
less than 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.TUESDAY...Mostly clear. Lows 55-65. Highs 85-95. Min humidities
15-25 percent. East winds 5-10 mph.
.WEDNESDAY...Mostly clear. Lows 55-65. Highs 85-95. Min humidities
15-25 percent. East winds 5-10 mph.
.THURSDAY...Mostly clear. Lows 55-65. Highs 85-95. Southwest winds
5-10 mph.
.FRIDAY...Partly cloudy. Lows 55-65. Highs 80-90.
.SATURDAY...Partly cloudy. Lows 55-65. Highs 75-85.
$$
MTZ107-010915-
Flathead Reservation-
314 AM MDT Sun Aug 31 2025
.TODAY...
* Sky/Weather.........Partly cloudy. Haze.
* Max Temperature.....90-95 valleys and 70-75 ridges.
* Min Humidity........11-16 percent valleys and 23-33 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in
the afternoon.
* Ridge Top............South 5-15 mph becoming west up to 5 mph in
the afternoon.
* Mixing Height.......1-2 kft agl until 1100. 11 kft agl after
1400.
* Transport Winds.....Variable less than 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.TONIGHT...
* Sky/Weather.........Partly cloudy. Haze after midnight.
* Min Temperature.....55-65.
* Max Humidity........55-65 percent valleys and 37-47 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Northeast 5-15 mph.
* Ridge Top............Northeast 10-20 mph.
* Mixing Height.......9 kft agl until 1900. Below 500 ft to 1 kft
agl after 2000.
* Transport Winds.....East 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.LABOR DAY...
* Sky/Weather.........Mostly sunny. Haze.
* Max Temperature.....90-95 valleys and 75-80 ridges.
* Min Humidity........11-16 percent valleys and 23-33 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Northeast 10-15 mph.
* Ridge Top............East 10-15 mph.
* Mixing Height.......2 kft agl until 1100. 10 kft agl after 1500.
* Transport Winds.....East 10 mph until 1300, then variable less
than 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.TUESDAY...Mostly clear. Lows 60-70. Highs 90-100. Min humidities
15-25 percent. Northeast winds 5-10 mph.
.WEDNESDAY...Mostly clear. Lows 60-70. Highs 85-95. Min humidities
15-25 percent. Northeast winds 5-10 mph.
.THURSDAY...Mostly clear. Lows 60-70. Highs 85-95. Northeast winds
5-10 mph.
.FRIDAY...Partly cloudy. Lows 60-70. Highs 85-95.
.SATURDAY...Partly cloudy. Lows 55-65. Highs 80-90.
$$
MTZ109-010915-
Bitterroot-
314 AM MDT Sun Aug 31 2025
.TODAY...
* Sky/Weather.........Partly cloudy. Haze.
* Max Temperature.....90-95 valleys and 75-80 ridges.
* Min Humidity........13-23 percent.
* 20-Foot Winds.......
* Lower Elevation......Calm to variable less than 7 mph.
* Ridge Top............Southeast 5-10 mph.
* Mixing Height.......3 kft agl until 1100. 11 kft agl after 1400.
* Transport Winds.....South 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.TONIGHT...
* Sky/Weather.........Partly cloudy. Haze.
* Min Temperature.....45-55 valleys and 55-60 ridges.
* Max Humidity........55-65 percent valleys and 36-46 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Northeast 5-10 mph becoming southeast after
midnight.
* Ridge Top............East 5-15 mph.
* Mixing Height.......10 kft agl until 1900. 1-2 kft agl after
2000.
* Transport Winds.....Variable less than 10 mph until 2000. 10 mph
after 0400.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.LABOR DAY...
* Sky/Weather.........Partly cloudy. Haze.
* Max Temperature.....90-95 valleys and 75-80 ridges.
* Min Humidity........13-23 percent.
* 20-Foot Winds.......
* Lower Elevation......Calm to variable less than 7 mph.
* Ridge Top............Southeast 5-10 mph.
* Mixing Height.......3 kft agl until 1100. 12 kft agl after 1400.
* Transport Winds.....South 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.TUESDAY...Mostly clear. Lows 55-65. Highs 80-90. Min humidities
10-20 percent. East winds 5-10 mph.
.WEDNESDAY...Mostly clear. Lows 55-65. Highs 80-90. Min humidities
10-20 percent. East winds 5-10 mph.
.THURSDAY...Mostly clear. Lows 55-65. Highs 80-90. Southwest winds
5-10 mph.
.FRIDAY...Partly cloudy. Lows 55-65. Highs 75-85.
.SATURDAY...Partly cloudy with slight chance of rain showers and
thunderstorms. Chance of precipitation 20 percent. Lows 55-65. Highs
70-80.
$$
MTZ110-111-010915-
Deerlodge/West Beaverhead-East Beaverhead-
314 AM MDT Sun Aug 31 2025
.TODAY...
* Sky/Weather.........Partly cloudy. Areas of smoke in the morning.
Haze.
* Max Temperature.....80-85 valleys and 70-80 ridges.
* Min Humidity........11-21 percent.
* 20-Foot Winds.......
* Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in
the afternoon.
* Ridge Top............Southwest 5-10 mph.
* Mixing Height.......3 kft agl until 1100. 11 kft agl after 1500.
* Transport Winds.....Variable less than 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.TONIGHT...
* Sky/Weather.........Partly cloudy. Haze.
* Min Temperature.....38-48 valleys and 45-55 ridges.
* Max Humidity........52-62 percent valleys and 40-50 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Northeast 5-10 mph becoming southeast after
midnight.
* Ridge Top............East 10-15 mph.
* Mixing Height.......9 kft agl until 1900. Below 500 ft to 1 kft
agl after 2000.
* Transport Winds.....East 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.LABOR DAY...
* Sky/Weather.........Partly cloudy. Haze in the morning.
* Max Temperature.....85-90 valleys and 70-80 ridges.
* Min Humidity........10-20 percent.
* 20-Foot Winds.......
* Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in
the afternoon.
* Ridge Top............Southeast 5-10 mph.
* Mixing Height.......Below 500 ft to 1 kft agl until 1000. 11 kft
agl after 1500.
* Transport Winds.....Variable less than 10 mph.
* Chance Lightning....Near 0 percent in the Deerlodge/West
Beaverhead...and 0 percent in the East Beaverhead.
* CWR (> 0.10 Inch)...0 percent.
.TUESDAY...Mostly clear. Lows 50-60. Highs 80-90. Min humidities
10-20 percent. East winds 5-10 mph.
.WEDNESDAY...Mostly clear. Lows 50-60. Highs 75-85. Min humidities
10-20 percent. North winds 5-10 mph.
.THURSDAY...Mostly clear. Lows 50-60. Highs 75-85. West winds 5-10 mph.
.FRIDAY...Partly cloudy with slight chance of rain showers. Chance of
showers 20 percent. Lows 50-60. Highs 75-85.
.SATURDAY...Partly cloudy with chance of rain showers. Chance of
showers 30 percent. Lows 50-60. Highs 70-80.
$$