Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Missoula, MT
Issued by NWS Missoula, MT
082
FNUS55 KMSO 171055
FWFMSO
Fire Weather Planning Forecast for Wrn Montana and N Cntrl Idaho
National Weather Service Missoula MT
455 AM MDT Sun Aug 17 2025
.DISCUSSION...
Idaho (Zones 102 and 103): A few showers and thunderstorms will continue
to move through this morning, mainly southern zone 103. A few more
storms will develop this afternoon, then another round of nocturnal
showers tonight into Monday morning. Temperatures will be steadily
warming over the next couple days with the potential of afternoon
convection. A disturbance Wednesday into Thursday will cause
temperatures to cool with increased westerly winds.
Northwest MT (Zones 104 and 105): Patchy fog this morning followed by
slightly warmer temperatures this afternoon. Scattered showers and
thunderstorms are expected to move into the region Monday morning.
Temperatures will be steadily warming over the next couple days with
the potential of afternoon convection. A disturbance Wednesday into
Thursday will cause temperatures to cool with increased westerly winds.
West Central MT (Zones 106, 107 and 108): A few showers and
thunderstorms will continue to move through this morning, mainly
zone 108. A few more storms will develop this afternoon, then another
round of nocturnal showers tonight into Monday morning. Temperatures
will be steadily warming over the next couple days with the potential of
afternoon convection. A disturbance Wednesday into Thursday will cause
temperatures to cool with increased westerly winds.
Southwest MT (Zones 109, 110 and 111): Scattered showers and
thunderstorms will be moving through early this morning. Then this
afternoon stronger storms are expected to develop causing gusty erratic
winds along with heavy rainfall. Temperatures will
be steadily warming over the next couple days with the potential of
afternoon convection. A disturbance Wednesday into Thursday will cause
temperatures to cool with increased westerly winds.
View Weather Briefing videos on our YouTube channel
at https://www.youtube.com/NWSMissoula
IDZ102-103-181100-
Palouse/Hells Canyon-Clearwater/Nez Perce-
355 AM PDT Sun Aug 17 2025
.TODAY...
* Sky/Weather.........Partly cloudy. Slight chance of rain. Chance of
thunderstorms in the afternoon.
* Max Temperature.....83-93 valleys and 65-75 ridges.
* Min Humidity........31-41 percent valleys and 42-52 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in
the afternoon.
* Ridge Top............Southwest up to 5 mph.
* Mixing Height.......3 kft agl until 1100. 7 kft agl after 1300.
* Transport Winds.....Variable less than 10 mph until 1100, then
west 10 mph.
* Chance Lightning....25 percent in the Palouse/Hells Canyon...and
50 percent in the Clearwater/Nez Perce.
* CWR (> 0.10 Inch)...0 percent in the Palouse/Hells Canyon...and
20 percent in the Clearwater/Nez Perce.
.TONIGHT...
* Sky/Weather.........Partly cloudy. Slight chance of rain showers
and thunderstorms.
* Min Temperature.....50-60.
* Max Humidity........60-70 percent.
* 20-Foot Winds.......
* Lower Elevation......Downslope/downvalley 2-5 mph.
* Ridge Top............Northwest up to 5 mph becoming southeast
5-10 mph after midnight.
* Mixing Height.......5 kft agl until 2000, then below 500 ft to 1
kft agl.
* Transport Winds.....Variable less than 10 mph.
* Chance Lightning....20 percent.
* CWR (> 0.10 Inch)...0 percent.
.MONDAY...
* Sky/Weather.........Partly cloudy. Slight chance of thunderstorms
in the afternoon.
* Max Temperature.....90-100 valleys and 75-80 ridges.
* Min Humidity........23-33 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.......1-2 kft agl until 1000. 9 kft agl after 1400.
* Transport Winds.....Variable less than 10 mph until 0900, then
southwest 10 mph until 1300, then 15 mph.
* Chance Lightning....Near 0 percent in the Palouse/Hells
Canyon...and 20 percent in the Clearwater/Nez Perce.
* CWR (> 0.10 Inch)...0 percent.
.TUESDAY...Mostly clear. Lows 55-65. Highs 85-95. Min humidities
15-25 percent. Northwest winds 5-10 mph.
.WEDNESDAY...Mostly clear. Lows 55-65. Highs 80-90. Min humidities
15-25 percent. Northwest winds 5-10 mph.
.THURSDAY...Clear. Lows 55-65. Highs 80-90. Northwest winds 5-10 mph.
.FRIDAY...Clear. Lows 55-65. Highs 85-95.
.SATURDAY...Mostly clear. Lows 55-65. Highs 90-100.
$$
MTZ104-105-181100-
Kootenai-Flathead/Glacier Park-
455 AM MDT Sun Aug 17 2025
.TODAY...
* Sky/Weather.........Partly cloudy.
* Max Temperature.....80-85 valleys and 60-70 ridges.
* Min Humidity........21-31 percent valleys and 34-44 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Southwest 10-15 mph.
* Ridge Top............Southwest 10-15 mph.
* Mixing Height.......3 kft agl until 1000. 8 kft agl after 1500.
* Transport Winds.....Southwest 10 mph until 1300, then west 15
mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.TONIGHT...
* Sky/Weather.........Partly cloudy.
* Min Temperature.....50-55.
* Max Humidity........80-90 percent valleys and 60-70 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Downslope/downvalley 1-3 mph.
* Ridge Top............Southwest 5-15 mph.
* Mixing Height.......6 kft agl until 2000, then below 500 ft to 1
kft agl.
* Transport Winds.....West 15 mph until 2000, then variable less
than 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.MONDAY...
* Sky/Weather.........Partly cloudy. Slight chance of thunderstorms
in the afternoon.
* Max Temperature.....80-90 valleys and 65-75 ridges.
* Min Humidity........23-33 percent valleys and 34-44 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in
the afternoon.
* Ridge Top............Southwest 5-15 mph.
* Mixing Height.......3 kft agl until 1100. 8 kft agl after 1500.
* Transport Winds.....South 10 mph until 1300, then southwest 15
mph.
* Chance Lightning....15 percent.
* CWR (> 0.10 Inch)...0 percent.
.TUESDAY...Mostly clear. Lows 55-65. Highs 80-90. Min humidities
15-25 percent. Southwest winds 5-10 mph.
.WEDNESDAY...Mostly clear. Lows 55-65. Highs 80-90. Min humidities
15-25 percent. Southwest winds 10-15 mph.
.THURSDAY...Mostly clear. Lows 50-60. Highs 75-85. West winds
10-15 mph.
.FRIDAY...Mostly clear. Lows 50-60. Highs 75-85.
.SATURDAY...Mostly clear. Lows 50-60. Highs 80-90.
$$
MTZ106-108-181100-
West Lolo-East Lolo-
455 AM MDT Sun Aug 17 2025
.TODAY...
* Sky/Weather.........Partly cloudy. Slight chance of rain. Chance of
thunderstorms in the afternoon.
* Max Temperature.....75-85 valleys and 68-78 ridges.
* Min Humidity........27-37 percent valleys and 37-47 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 1000. 8 kft agl after 1400.
* Transport Winds.....West 10 mph until 1400, then 15 mph.
* Chance Lightning....25 percent in the West Lolo...and 40 percent
in the East Lolo.
* CWR (> 0.10 Inch)...0 percent.
.TONIGHT...
* Sky/Weather.........Partly cloudy.
* Min Temperature.....50-55.
* Max Humidity........71-81 percent valleys and 64-74 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Downslope/downvalley 1-3 mph.
* Ridge Top............Southwest 5-10 mph becoming south after
midnight.
* Mixing Height.......6 kft agl until 2000, then below 500 ft to 1
kft agl.
* Transport Winds.....Southwest 10 mph until 2400, then variable
less than 10 mph.
* Chance Lightning....Near 0 percent in the West Lolo...and 20
percent in the East Lolo.
* CWR (> 0.10 Inch)...0 percent.
.MONDAY...
* Sky/Weather.........Partly cloudy. Slight chance of thunderstorms
in the afternoon.
* Max Temperature.....80-90 valleys and 73-83 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 5-10 mph.
* Mixing Height.......3 kft agl until 1100, then 10 kft agl after 1300.
* Transport Winds.....South 10 mph until 1200, then southwest 20
mph.
* Chance Lightning....15 percent in the West Lolo...and 20 percent
in the East Lolo.
* CWR (> 0.10 Inch)...0 percent.
.TUESDAY...Mostly clear. Lows 55-65. Highs 85-95. Min humidities
10-20 percent. West winds 5-10 mph.
.WEDNESDAY...Mostly clear. Lows 55-65. Highs 80-90. Min humidities
10-20 percent. West winds 5-10 mph.
.THURSDAY...Mostly clear. Lows 55-65. Highs 80-90. West winds
10-15 mph.
.FRIDAY...Mostly clear. Lows 50-60. Highs 80-90.
.SATURDAY...Mostly clear. Lows 50-60. Highs 85-95.
$$
MTZ107-181100-
Flathead Reservation-
455 AM MDT Sun Aug 17 2025
.TODAY...
* Sky/Weather.........Partly cloudy. Slight chance of rain.
* Max Temperature.....85-90 valleys and 60-65 ridges.
* Min Humidity........22-32 percent valleys and 39-49 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Calm to variable less than 7 mph.
* Ridge Top............Southwest 5-10 mph.
* Mixing Height.......1-2 kft agl until 1000. 9 kft agl after 1400.
* Transport Winds.....Southwest 10 mph.
* Chance Lightning....Near 0 percent in areas west of Highway
93...and 20 percent in the Mission Mtns and areas east of Highway
93.
* CWR (> 0.10 Inch)...0 percent.
.TONIGHT...
* Sky/Weather.........Partly cloudy.
* Min Temperature.....50-60.
* Max Humidity........71-81 percent valleys and 65-75 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Downslope/downvalley 1-3 mph.
* Ridge Top............South 5-10 mph.
* Mixing Height.......7 kft agl until 2000, then below 500 ft to 1
kft agl.
* Transport Winds.....Southwest 10 mph until 2100, then variable
less than 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.MONDAY...
* Sky/Weather.........Partly cloudy. Slight chance of thunderstorms
in the afternoon.
* Max Temperature.....90-95 valleys and 65-70 ridges.
* Min Humidity........21-31 percent valleys and 32-42 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.......1-2 kft agl until 1000. 9 kft agl after 1400.
* Transport Winds.....Variable less than 10 mph until 1000, then
south 10 mph until 1400, then southwest 15 mph.
* Chance Lightning....15 percent in areas west of Highway 93...and
20 percent in the Mission Mtns and areas east of Highway 93.
* CWR (> 0.10 Inch)...0 percent.
.TUESDAY...Mostly clear. Lows 60-70. Highs 90-100. Min humidities
10-20 percent. West winds 5-10 mph.
.WEDNESDAY...Mostly clear. Lows 60-70. Highs 85-95. Min humidities
10-20 percent. West winds 5-10 mph.
.THURSDAY...Mostly clear. Lows 55-65. Highs 80-90. West winds
10-15 mph.
.FRIDAY...Mostly clear. Lows 55-65. Highs 80-90.
.SATURDAY...Mostly clear. Lows 55-65. Highs 85-95.
$$
MTZ109-181100-
Bitterroot-
455 AM MDT Sun Aug 17 2025
.TODAY...
* Sky/Weather.........Mostly cloudy. Rain showers likely and chance
of thunderstorms.
* Max Temperature.....80-85 valleys and 65-75 ridges.
* Min Humidity........34-44 percent valleys and 41-51 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Calm to variable less than 7 mph.
* Ridge Top............Southwest 5-10 mph.
* Mixing Height.......3 kft agl until 1100. 7 kft agl after 1300.
* Transport Winds.....Southwest 10 mph until 1300, then 15 mph.
* Chance Lightning....50 percent in the Darby, Sula, and West Fork
Districts...and 40 percent in areas north of Hamilton.
* CWR (> 0.10 Inch)...40 percent in the Darby, Sula, and West Fork
Districts...and 20 percent in areas north of Hamilton.
.TONIGHT...
* Sky/Weather.........Mostly cloudy then becoming partly cloudy.
Haze. Chance of rain showers and slight chance of thunderstorms.
* Min Temperature.....50-55.
* Max Humidity........82-92 percent valleys and 66-76 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Northeast 5-10 mph in the evening becoming
downslope/downvalley 2-5 mph.
* Ridge Top............North up to 5 mph becoming south 5-10 mph
after midnight.
* Mixing Height.......4 kft agl until 2000, then 1-2 kft agl.
* Transport Winds.....West 10 mph until 2100, then variable less
than 10 mph.
* Chance Lightning....20 percent in the Darby, Sula, and West Fork
Districts...and 15 percent in areas north of Hamilton.
* CWR (> 0.10 Inch)...0 percent.
.MONDAY...
* Sky/Weather.........Partly cloudy. Slight chance of thunderstorms
in the afternoon.
* Max Temperature.....85-90 valleys and 75-80 ridges.
* Min Humidity........24-34 percent.
* 20-Foot Winds.......
* Lower Elevation......Calm to variable less than 7 mph.
* Ridge Top............Southwest 5-10 mph.
* Mixing Height.......2 kft agl until 1000. 10 kft agl after 1200.
* Transport Winds.....South 10 mph until 1100, then southwest 20
mph.
* Chance Lightning....20 percent.
* CWR (> 0.10 Inch)...0 percent.
.TUESDAY...Mostly clear. Lows 55-65. Highs 85-95. Min humidities
10-20 percent. Southwest winds 5-10 mph.
.WEDNESDAY...Partly cloudy. Lows 55-65. Highs 80-90. Min humidities
15-25 percent. West winds 5-10 mph.
.THURSDAY...Mostly clear. Lows 50-60. Highs 80-90. West winds 5-10 mph.
.FRIDAY...Mostly clear. Lows 50-60. Highs 80-90.
.SATURDAY...Mostly clear. Lows 50-60. Highs 80-90.
$$
MTZ110-111-181100-
Deerlodge/West Beaverhead-East Beaverhead-
455 AM MDT Sun Aug 17 2025
.TODAY...
* Sky/Weather.........Partly cloudy. Slight chance of rain in the
morning. Chance of thunderstorms in the afternoon.
* Max Temperature.....75-85 valleys and 65-75 ridges.
* Min Humidity........24-34 percent.
* 20-Foot Winds.......
* Lower Elevation......Calm to becoming west 10-20 mph in the
afternoon.
* Ridge Top............Southwest 5-10 mph increasing to 10-20 mph
in the afternoon.
* Mixing Height.......1-2 kft agl until 1000, then 9 kft agl after 1300.
* Transport Winds.....Southwest 10 mph until 1200, then 15 mph.
* Chance Lightning....50 percent.
* CWR (> 0.10 Inch)...50 percent.
.TONIGHT...
* Sky/Weather.........Partly cloudy. Chance of rain showers and
thunderstorms.
* Min Temperature.....38-48 valleys and 45-50 ridges.
* Max Humidity........88-98 percent valleys and 68-78 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......South 5-10 mph.
* Ridge Top............South 5-10 mph.
* Mixing Height.......3 kft agl until 2000, then below 500 ft to 1
kft agl.
* Transport Winds.....West 15 mph until 2000, then variable less
than 10 mph.
* Chance Lightning....30 percent in the Deerlodge/West
Beaverhead...and 50 percent in the East Beaverhead.
* CWR (> 0.10 Inch)...10 percent.
.MONDAY...
* Sky/Weather.........Partly cloudy. Slight chance of thunderstorms
in the afternoon.
* Max Temperature.....80-90 valleys and 70-75 ridges.
* Min Humidity........15-25 percent.
* 20-Foot Winds.......
* Lower Elevation......Southwest 5-15 mph.
* Ridge Top............Southwest 10-20 mph.
* Mixing Height.......1-2 kft agl until 1000. 12 kft agl after
1400.
* Transport Winds.....South 10 mph until 1100, then southwest 20
mph.
* Chance Lightning....20 percent.
* CWR (> 0.10 Inch)...10 percent.
.TUESDAY...Mostly clear. Lows 50-60. Highs 85-95. Min humidities
10-20 percent. South winds 10-15 mph.
.WEDNESDAY...Mostly clear. Lows 55-65. Highs 80-90. Min humidities
15-25 percent. Southwest winds 10-15 mph.
.THURSDAY...Mostly clear. Lows 50-60. Highs 80-90. Northwest winds
10-15 mph.
.FRIDAY...Mostly clear. Lows 50-60. Highs 80-90.
.SATURDAY...Mostly clear. Lows 50-60. Highs 80-90.
$$