Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Missoula, MT
Issued by NWS Missoula, MT
849
FNUS55 KMSO 020818
FWFMSO
Fire Weather Planning Forecast for Wrn Montana and N Cntrl Idaho
National Weather Service Missoula MT
218 AM MDT Tue Sep 2 2025
.DISCUSSION...
Idaho (Zones 102 and 103): The dominant ridge of high pressure will
maintain hot and dry conditions through mid-week. The primary concerns
are extreme afternoon heat, poor overnight RH recoveries in thermal
belts, and persistent northeasterly winds. The strong ridge will
suppress convection but a virga shower is possible today. Widespread
smoke from regional fires will continue, with the potential for thicker
smoke to be transported into the area from Canada by Friday. The ridge
will begin to weaken by the weekend, allowing for a return of widespread
showers and thunderstorms.
Northwest MT (Zones 104 and 105): A strong ridge of high pressure will
ensure hot and dry conditions persist through mid-week. The primary
concerns will be poor overnight RH recoveries in thermal belts and
increasingly persistent easterly winds. The chance for any thunderstorm
activity is negligible through at least Thursday. Strengthening easterly
winds on Thursday and Friday will likely transport smoke from Canadian
fires into the region. Widespread showers and thunderstorms are possible
over the weekend as the ridge breaks down.
West Central MT (Zones 106, 107 and 108): Hot and dry conditions under
a strong ridge of high pressure will continue through the workweek. The
chance for any convection is negligible through the end of the week. The
primary concerns will be poor overnight RH recoveries in the thermal
belts, and persistent easterly winds. Increasing easterly winds
strengthen on Thursday and Friday and may bring in additional smoke from
Canada. A pattern shift over the weekend will bring a chance for
widespread showers and thunderstorms.
Southwest MT (Zones 109, 110 and 111): Hot and dry conditions will
persist through mid-week as high pressure remains in control. The threat
for convection is negligible. The main concerns will be poor overnight
RH recoveries in the thermal belts and persistent northeasterly winds.
Regional smoke will continue to cause hazy conditions, with the
potential for thicker smoke to arrive on northeasterly winds late in the
week. The ridge is forecast to weaken by the weekend, allowing
widespread showers and thunderstorms to return to the region.
IDZ102-103-030830-
Palouse/Hells Canyon-Clearwater/Nez Perce-
118 AM PDT Tue Sep 2 2025
.TODAY...
* Sky/Weather.........Partly cloudy. Areas of smoke.
* Max Temperature.....98-108 valleys and 80-90 ridges.
* Min Humidity........8-16 percent.
* 20-Foot Winds.......
* Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in
the afternoon.
* Ridge Top............South 5-10 mph becoming northwest in the
afternoon.
* Mixing Height.......1-2 kft agl until 1100. Greater than 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. Areas of smoke.
* Min Temperature.....55-65.
* Max Humidity........44-54 percent valleys and 36-46 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......East 5-10 mph.
* Ridge Top............Northeast 5-10 mph becoming east after
midnight.
* Mixing Height.......10 kft agl until 1900. Below 500 ft to 1 kft
agl after 2000.
* Transport Winds.....Variable less than 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny. Areas of smoke.
* Max Temperature.....98-108 valleys and 80-90 ridges.
* Min Humidity........8-17 percent.
* 20-Foot Winds.......
* Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in
the afternoon.
* Ridge Top............Southeast 5-10 mph becoming northwest in the
afternoon.
* Mixing Height.......2 kft agl until 1100. Greater than 12 kft agl
after 1500.
* Transport Winds.....Variable less than 10 mph until 1200, then
northwest 10 mph.
* Chance Lightning....0 percent in the Palouse/Hells Canyon...and
near 0 percent in the Clearwater/Nez Perce.
* CWR (> 0.10 Inch)...0 percent.
.THURSDAY...Mostly clear. Areas of smoke. Lows 60-70. Highs 90-100. Min
humidities 15-25 percent. Southeast winds 5-10 mph.
.FRIDAY...Mostly clear. Lows 60-70. Highs 85-95. Min humidities
10-20 percent. East winds 10-15 mph.
.SATURDAY...Partly cloudy with slight chance of rain showers. Chance of
showers 20 percent. Lows 60-70. Highs 80-90. South winds 5-10 mph.
.SUNDAY...Mostly cloudy with chance of rain showers and slight chance
of thunderstorms. Chance of precipitation 30 percent. Lows 55-65. Highs
75-85.
.MONDAY...Partly cloudy with chance of rain showers and slight chance
of thunderstorms. Chance of precipitation 30 percent. Lows 55-65. Highs
75-85.
$$
MTZ104-105-030830-
Kootenai-Flathead/Glacier Park-
218 AM MDT Tue Sep 2 2025
.TODAY...
* Sky/Weather.........Partly cloudy. Areas of smoke.
* Max Temperature.....90-100 valleys and 75-85 ridges.
* Min Humidity........10-19 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 10-15 mph becoming north 5-10 mph in
the afternoon.
* Mixing Height.......3 kft agl until 1200. Greater than 12 kft agl
after 1600.
* Transport Winds.....Variable less than 10 mph until 1200.
Northwest 10 mph after 1400.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.TONIGHT...
* Sky/Weather.........Partly cloudy. Areas of smoke.
* Min Temperature.....50-60.
* Max Humidity........72-82 percent valleys and 53-63 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Northeast 5-15 mph.
* Ridge Top............Northeast 5-15 mph.
* Mixing Height.......10 kft agl until 1900. Below 500 ft to 1 kft
agl after 2000.
* Transport Winds.....North 10 mph until 2000, then east 10 mph
until 0500, then 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny. Areas of smoke.
* Max Temperature.....95-105 valleys and 75-85 ridges.
* Min Humidity........12-17 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 becoming west in the
afternoon.
* Mixing Height.......2 kft agl until 1100. 10 kft agl after 1600.
* Transport Winds.....Variable less than 10 mph until 1000, then
west 10 mph until 1500, then northwest 15 mph.
* Chance Lightning....0 percent in the Kootenai...and near 0
percent in the Flathead/Glacier Park.
* CWR (> 0.10 Inch)...0 percent.
.THURSDAY...Not as warm. Mostly clear. Areas of smoke. Lows 55-65.
Highs 75-85. Min humidities 20-30 percent. Northeast winds 10-20 mph.
.FRIDAY...Mostly clear. Lows 50-60. Highs 80-90. Min humidities
15-25 percent. East winds 10-15 mph.
.SATURDAY...Mostly clear. Lows 55-65. Highs 80-90. Southeast winds
5-10 mph.
.SUNDAY...Mostly cloudy with slight chance of rain showers. Chance of
showers 20 percent. Lows 55-65. Highs 75-85.
.MONDAY...Mostly cloudy with slight chance of rain showers and
thunderstorms. Chance of precipitation 20 percent. Lows 55-65. Highs
70-80.
$$
MTZ106-108-030830-
West Lolo-East Lolo-
218 AM MDT Tue Sep 2 2025
.TODAY...
* Sky/Weather.........Partly cloudy. Areas of smoke.
* Max Temperature.....90-100 valleys and 83-93 ridges.
* Min Humidity........8-18 percent.
* 20-Foot Winds.......
* Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in
the afternoon.
* Ridge Top............Southeast 5-10 mph becoming north in the
afternoon.
* Mixing Height.......3 kft agl until 1200. Greater than 12 kft agl
after 1600.
* Transport Winds.....Variable less than 10 mph until 1300, then
northwest 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.TONIGHT...
* Sky/Weather.........Partly cloudy. Areas of smoke.
* Min Temperature.....53-63.
* Max Humidity........53-63 percent valleys and 40-50 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......East 5-10 mph.
* Ridge Top............East 5-15 mph.
* Mixing Height.......11 kft agl until 1900. Below 500 ft to 1 kft
agl after 2000.
* Transport Winds.....North 10 mph until 2100. Variable less than
10 mph after 0500.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny. Areas of smoke.
* Max Temperature.....90-100 valleys and 83-93 ridges.
* Min Humidity........8-18 percent.
* 20-Foot Winds.......
* Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in
the afternoon.
* Ridge Top............Southeast 5-15 mph becoming northwest 5-10
mph in the afternoon.
* Mixing Height.......2 kft agl until 1100. 12 kft agl after 1500.
* Transport Winds.....Variable less than 10 mph until 1100, then
west 10 mph until 1500, then northwest 15 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.THURSDAY...Not as warm. Mostly clear. Areas of smoke. Lows 60-70.
Highs 80-90. Min humidities 15-25 percent. Northeast winds 10-15 mph.
.FRIDAY...Mostly clear. Lows 50-60. Highs 80-90. Min humidities
15-25 percent. East winds 10-20 mph.
.SATURDAY...Partly cloudy. Lows 55-65. Highs 80-90. East winds
5-10 mph.
.SUNDAY...Mostly cloudy with slight chance of rain showers. Chance of
showers 20 percent. Lows 55-65. Highs 75-85.
.MONDAY...Mostly cloudy with chance of rain showers and slight chance
of thunderstorms. Chance of precipitation 30 percent. Lows 55-65. Highs
70-80.
$$
MTZ107-030830-
Flathead Reservation-
218 AM MDT Tue Sep 2 2025
.TODAY...
* Sky/Weather.........Partly cloudy. Areas of smoke.
* Max Temperature.....95-100 valleys and 75-80 ridges.
* Min Humidity........11-21 percent.
* 20-Foot Winds.......
* Lower Elevation......Calm to variable less than 7 mph.
* Ridge Top............Southeast 5-10 mph becoming northwest in the
afternoon.
* Mixing Height.......3 kft agl until 1200. 12 kft agl after 1600.
* Transport Winds.....Variable less than 10 mph until 1300, then
northwest 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.TONIGHT...
* Sky/Weather.........Mostly clear. Areas of smoke.
* Min Temperature.....55-65.
* Max Humidity........58-68 percent valleys and 47-57 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Northeast 5-15 mph.
* Ridge Top............Northeast 5-15 mph becoming southeast after
midnight.
* Mixing Height.......10 kft agl until 1900. Below 500 ft to 1 kft
agl after 2000.
* Transport Winds.....North 10 mph until 2000, then east 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny. Areas of smoke.
* Max Temperature.....95-100 valleys and 75-80 ridges.
* Min Humidity........11-16 percent valleys and 18-28 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in
the afternoon.
* Ridge Top............Southeast 5-15 mph becoming west 5-10 mph in
the afternoon.
* Mixing Height.......3 kft agl until 1200. 11 kft agl after 1500.
* Transport Winds.....Variable less than 10 mph until 1100, then
northwest 10 mph.
* Chance Lightning....0 percent in areas west of Highway 93...and
near 0 percent in the Mission Mtns and areas east of Highway 93.
* CWR (> 0.10 Inch)...0 percent.
.THURSDAY...Mostly clear. Areas of smoke. Lows 60-70. Highs 85-95. Min
humidities 15-25 percent. Northeast winds 10-15 mph.
.FRIDAY...Mostly clear. Lows 55-65. Highs 80-90. Min humidities
15-25 percent. Northeast winds 10-20 mph.
.SATURDAY...Partly cloudy. Lows 55-65. Highs 80-90. Northeast winds
5-10 mph.
.SUNDAY...Mostly cloudy with slight chance of rain showers. Chance of
showers 20 percent. Lows 55-65. Highs 75-85.
.MONDAY...Mostly cloudy with chance of rain showers and slight chance
of thunderstorms. Chance of precipitation 30 percent. Lows 55-65. Highs
75-85.
$$
MTZ109-030830-
Bitterroot-
218 AM MDT Tue Sep 2 2025
.TODAY...
* Sky/Weather.........Partly cloudy. Areas of smoke in the
afternoon.
* Max Temperature.....90-95 valleys and 80-85 ridges.
* Min Humidity........9-18 percent.
* 20-Foot Winds.......
* Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in
the afternoon.
* Ridge Top............South 5-10 mph becoming northwest in the
afternoon.
* Mixing Height.......2 kft agl until 1100. Greater than 12 kft agl
after 1300.
* Transport Winds.....Variable less than 10 mph until 1100.
Northwest 10 mph after 1200.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.TONIGHT...
* Sky/Weather.........Mostly clear. Areas of smoke.
* Min Temperature.....55-60.
* Max Humidity........51-61 percent valleys and 37-47 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......North 5-10 mph becoming southeast after
midnight.
* Ridge Top............Northeast 5-10 mph becoming east after
midnight.
* Mixing Height.......10 kft agl until 1900. 1-2 kft agl after
2000.
* Transport Winds.....North 10 mph until 2300. Variable less than
10 mph after 0400.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny. Areas of smoke.
* Max Temperature.....95-100 valleys and 80-85 ridges.
* Min Humidity........9-19 percent.
* 20-Foot Winds.......
* Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in
the afternoon.
* Ridge Top............Southeast 5-10 mph becoming northwest in the
afternoon.
* Mixing Height.......3 kft agl until 1100. 11 kft agl after 1500.
* Transport Winds.....Variable less than 10 mph until 1000.
Northwest 10 mph after 1200.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.THURSDAY...Mostly clear. Areas of smoke. Lows 55-65. Highs 80-90. Min
humidities 10-20 percent. West winds 5-10 mph.
.FRIDAY...Mostly clear. Lows 50-60. Highs 75-85. Min humidities
20-30 percent. East winds 10-15 mph.
.SATURDAY...Partly cloudy with chance of rain showers and slight chance
of thunderstorms. Chance of precipitation 30 percent. Lows 55-65. Highs
75-85. South winds 5-10 mph.
.SUNDAY...Cooler. Mostly cloudy with chance of rain showers and slight
chance of thunderstorms. Chance of precipitation 30 percent. Lows
55-65. Highs 65-75.
.MONDAY...Partly cloudy with chance of rain showers and slight chance
of thunderstorms. Chance of precipitation 40 percent. Lows 50-60. Highs
70-80.
$$
MTZ110-111-030830-
Deerlodge/West Beaverhead-East Beaverhead-
218 AM MDT Tue Sep 2 2025
.TODAY...
* Sky/Weather.........Partly cloudy. Areas of smoke in the
afternoon.
* Max Temperature.....85-90 valleys and 70-80 ridges.
* Min Humidity........9-19 percent.
* 20-Foot Winds.......
* Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in
the afternoon.
* Ridge Top............West 5-10 mph becoming north in the
afternoon.
* Mixing Height.......2 kft agl until 1100. Greater than 12 kft agl
after 1500.
* Transport Winds.....Variable less than 10 mph until 1000, then
northwest 10 mph until 1700, then north 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.TONIGHT...
* Sky/Weather.........Partly cloudy. Areas of smoke.
* Min Temperature.....40-50 valleys and 50-55 ridges.
* Max Humidity........56-66 percent valleys and 40-50 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......North 5-10 mph in the evening becoming
downslope/downvalley 2-5 mph.
* Ridge Top............Northeast 5-10 mph.
* Mixing Height.......11 kft agl until 1900. Below 500 ft to 1 kft
agl after 2000.
* Transport Winds.....Northeast 10 mph until 0100, then variable
less than 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny. Areas of smoke.
* 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............West 5-10 mph becoming northwest 5-15 mph in
the afternoon.
* Mixing Height.......Below 500 ft to 1 kft agl until 1000. 12 kft
agl after 1600.
* Transport Winds.....Variable less than 10 mph until 1000, then
northwest 10 mph until 1400, then 15 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.THURSDAY...Mostly clear. Lows 50-60. Highs 75-85. Min humidities
15-25 percent. Northwest winds 10-15 mph.
.FRIDAY...Mostly clear. Lows 45-55. Highs 75-85. Min humidities
20-30 percent. Northeast winds 10-15 mph.
.SATURDAY...Partly cloudy with chance of rain showers. Chance of
showers 40 percent. Lows 50-60. Highs 70-80. South winds 5-10 mph.
.SUNDAY...Mostly cloudy with chance of rain showers and slight chance
of thunderstorms. Chance of precipitation 30 percent. Lows 50-60. Highs
65-75.
.MONDAY...Partly cloudy with chance of rain showers and slight chance
of thunderstorms. Chance of precipitation 30 percent. Lows 45-55. Highs
65-75.
$$