Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Missoula, MT
Issued by NWS Missoula, MT
920
FNUS55 KMSO 162004
FWFMSO
Fire Weather Planning Forecast for Wrn Montana and N Cntrl Idaho
National Weather Service Missoula MT
204 PM MDT Tue Sep 16 2025
.DISCUSSION...
Idaho (Zones 102 and 103): A warming and drying trend is expected
through Friday under high pressure. Relatively light winds for much of
this week, with easterly winds continuing into Wednesday with some gusty
winds on the ridgetops. Thermal belts return late this week.
Northwest MT (Zones 104 and 105): A warming and drying trend is
expected through Friday under high pressure. Relatively light winds for
much of this week, with easterly winds continuing into Wednesday with
some gusty winds on the ridgetops. Thermal belts return late this week.
West Central MT (Zones 106, 107 and 108): A warming and drying trend is
expected through Friday under high pressure. Relatively light winds for
much of this week, with easterly winds continuing into Wednesday with
some gusty winds on the ridgetops. Thermal belts return late this week.
Southwest MT (Zones 109, 110 and 111): Showers will linger into the
evening and an isolated thunderstorm cannot be ruled out. A warming and
drying trend is expected through Friday under high pressure. Relatively
light winds for much of this week, with easterly winds continuing into
Wednesday with some gusty winds on the ridgetops. Thermal belts return
late this week.
IDZ102-103-172015-
Palouse/Hells Canyon-Clearwater/Nez Perce-
104 PM PDT Tue Sep 16 2025
.TONIGHT...
* Sky/Weather.........Mostly clear.
* Min Temperature.....45-55.
* Max Humidity........75-85 percent valleys and 69-79 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......East 5-10 mph.
* Ridge Top............East 5-10 mph.
* Mixing Height.......5 kft agl until 1900, then below 500 ft to 1
kft agl.
* Transport Winds.....East 10 mph.
* Chance Lightning....0 percent.
* CWR (> 0.10 Inch)...0 percent.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny.
* Max Temperature.....83-93 valleys and 70-75 ridges.
* Min Humidity........23-33 percent.
* 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 1100. 7 kft agl after 1500.
* Transport Winds.....Southeast 10 mph.
* Chance Lightning....0 percent.
* CWR (> 0.10 Inch)...0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather.........Clear.
* Min Temperature.....45-55.
* Max Humidity........55-65 percent.
* 20-Foot Winds.......
* Lower Elevation......Downslope/downvalley 2-5 mph.
* Ridge Top............Northeast up to 5 mph becoming southeast
5-10 mph after midnight.
* Mixing Height.......4 kft agl until 2000, then below 500 ft to 1
kft agl.
* Transport Winds.....Variable less than 10 mph.
* Chance Lightning....0 percent.
* CWR (> 0.10 Inch)...0 percent.
.THURSDAY...
* Sky/Weather.........Mostly sunny.
* Max Temperature.....85-95 valleys and 70-80 ridges.
* Min Humidity........20-30 percent.
* 20-Foot Winds.......
* Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in
the afternoon.
* Ridge Top............Southeast 5-10 mph becoming southwest up to
5 mph in the afternoon.
* Mixing Height.......2 kft agl until 1100. 8 kft agl after 1300.
* Transport Winds.....Variable less than 10 mph.
* Chance Lightning....0 percent.
* CWR (> 0.10 Inch)...0 percent.
.FRIDAY...Mostly clear. Lows 55-65. Highs 80-90. Min humidities
20-30 percent. Diurnal terrain winds to 10 mph.
.SATURDAY...Partly cloudy. Lows 55-65. Highs 75-85. Min humidities
25-35 percent. South winds 5-10 mph.
.SUNDAY...Cooler. Partly cloudy with slight chance of rain. Chance of
rain 20 percent. Lows 50-60. Highs 65-75. Southwest winds 5-10 mph.
.MONDAY...Partly cloudy with slight chance of rain. Chance of rain
20 percent. Lows 45-55. Highs 70-80.
.TUESDAY...Mostly clear. Lows 45-55.
$$
MTZ104-105-172015-
Kootenai-Flathead/Glacier Park-
204 PM MDT Tue Sep 16 2025
.TONIGHT...
* Sky/Weather.........Mostly clear.
* Min Temperature.....45-50.
* Max Humidity........90-100 percent valleys and 66-76 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......East 5-10 mph.
* Ridge Top............East 5-10 mph.
* Mixing Height.......6 kft agl until 1900, then below 500 ft to 1
kft agl.
* Transport Winds.....East 10 mph.
* Chance Lightning....0 percent in the Kootenai...and near 0
percent in the Flathead/Glacier Park.
* CWR (> 0.10 Inch)...0 percent.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny.
* Max Temperature.....80-90 valleys and 65-75 ridges.
* Min Humidity........22-32 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............Southeast 5-10 mph.
* Mixing Height.......2 kft agl until 1100. 6 kft agl after 1300.
* Transport Winds.....Variable less than 10 mph.
* Chance Lightning....0 percent.
* CWR (> 0.10 Inch)...0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather.........Mostly clear.
* Min Temperature.....45-55.
* Max Humidity........81-91 percent valleys and 53-63 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Downslope/downvalley 1-3 mph.
* Ridge Top............Southeast 5-10 mph.
* Mixing Height.......4 kft agl until 2000, then below 500 ft to 1
kft agl.
* Transport Winds.....Variable less than 10 mph.
* Chance Lightning....0 percent.
* CWR (> 0.10 Inch)...0 percent.
.THURSDAY...
* Sky/Weather.........Mostly sunny.
* Max Temperature.....80-90 valleys and 65-75 ridges.
* Min Humidity........19-29 percent valleys and 26-36 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in
the afternoon.
* Ridge Top............East 5-10 mph becoming south up to 5 mph in
the afternoon.
* Mixing Height.......2 kft agl until 1100. 8 kft agl after 1600.
* Transport Winds.....Variable less than 10 mph.
* Chance Lightning....0 percent.
* CWR (> 0.10 Inch)...0 percent.
.FRIDAY...Mostly clear. Lows 50-60. Highs 75-85. Min humidities
15-25 percent. East winds 5-10 mph.
.SATURDAY...Partly cloudy. Lows 50-60. Highs 70-80. Min humidities
20-30 percent. Southwest winds 10-15 mph.
.SUNDAY...Cooler. Partly cloudy with slight chance of rain. Chance of
rain 20 percent. Lows 50-60. Highs 60-70. Southwest winds 10-20 mph.
.MONDAY...Partly cloudy with slight chance of rain. Chance of rain
20 percent. Lows 45-55. Highs 60-70.
.TUESDAY...Partly cloudy with slight chance of rain. Chance of rain
20 percent. Lows 45-55.
$$
MTZ106-108-172015-
West Lolo-East Lolo-
204 PM MDT Tue Sep 16 2025
.TONIGHT...
* Sky/Weather.........Mostly clear.
* Min Temperature.....40-50.
* Max Humidity........79-89 percent valleys and 70-80 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......East 5-10 mph.
* Ridge Top............East 10-15 mph.
* Mixing Height.......6 kft agl until 1900, then below 500 ft to 1
kft agl.
* Transport Winds.....East 10 mph.
* Chance Lightning....0 percent in the West Lolo...and near 0
percent in the East Lolo.
* CWR (> 0.10 Inch)...0 percent.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny.
* Max Temperature.....80-85 valleys and 68-78 ridges.
* Min Humidity........20-30 percent valleys and 28-38 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Calm to variable less than 7 mph.
* Ridge Top............Southeast up to 5 mph.
* Mixing Height.......2 kft agl until 1100. 6 kft agl after 1300.
* Transport Winds.....Southeast 10 mph.
* Chance Lightning....0 percent in the West Lolo...and near 0
percent in the East Lolo.
* CWR (> 0.10 Inch)...0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather.........Clear.
* Min Temperature.....43-53.
* Max Humidity........69-79 percent valleys and 55-65 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Downslope/downvalley 1-3 mph.
* Ridge Top............East 5-10 mph.
* Mixing Height.......4 kft agl until 2000, then below 500 ft to 1
kft agl.
* Transport Winds.....Variable less than 10 mph.
* Chance Lightning....0 percent.
* CWR (> 0.10 Inch)...0 percent.
.THURSDAY...
* Sky/Weather.........Sunny.
* Max Temperature.....80-90 valleys and 70-80 ridges.
* Min Humidity........19-29 percent.
* 20-Foot Winds.......
* Lower Elevation......Calm to variable less than 7 mph.
* Ridge Top............East up to 5 mph.
* Mixing Height.......2 kft agl until 1100. 7 kft agl after 1600.
* Transport Winds.....Variable less than 10 mph.
* Chance Lightning....0 percent.
* CWR (> 0.10 Inch)...0 percent.
.FRIDAY...Mostly clear. Lows 50-60. Highs 75-85. Min humidities
15-25 percent. Diurnal terrain winds to 10 mph.
.SATURDAY...Partly cloudy. Lows 50-60. Highs 75-85. Min humidities
20-30 percent. Southwest winds 5-10 mph.
.SUNDAY...Cooler. Partly cloudy with slight chance of rain. Chance of
rain 20 percent. Lows 50-60. Highs 65-75. Southwest winds 10-15 mph.
.MONDAY...Partly cloudy with slight chance of rain. Chance of rain
20 percent. Lows 45-55. Highs 65-75.
.TUESDAY...Partly cloudy. Lows 45-55.
$$
MTZ107-172015-
Flathead Reservation-
204 PM MDT Tue Sep 16 2025
.TONIGHT...
* Sky/Weather.........Mostly clear.
* Min Temperature.....45-55.
* Max Humidity........84-94 percent valleys and 73-83 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Northeast 5-10 mph.
* Ridge Top............East 10-15 mph.
* Mixing Height.......5 kft agl until 1900, then below 500 ft to 1
kft agl.
* Transport Winds.....East 10 mph.
* Chance Lightning....0 percent.
* CWR (> 0.10 Inch)...0 percent.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny.
* Max Temperature.....80-85 valleys and 60-65 ridges.
* Min Humidity........30-40 percent valleys and 39-49 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in
the afternoon.
* Ridge Top............Southeast 5-15 mph.
* Mixing Height.......1-2 kft agl until 1100. 6 kft agl after 1300.
* Transport Winds.....Variable less than 10 mph.
* Chance Lightning....0 percent.
* CWR (> 0.10 Inch)...0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather.........Clear.
* Min Temperature.....45-55.
* Max Humidity........72-82 percent valleys and 60-70 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Downslope/downvalley 1-3 mph.
* Ridge Top............Southeast 5-10 mph.
* Mixing Height.......4 kft agl until 2000, then below 500 ft to 1
kft agl.
* Transport Winds.....Variable less than 10 mph.
* Chance Lightning....0 percent.
* CWR (> 0.10 Inch)...0 percent.
.THURSDAY...
* Sky/Weather.........Mostly sunny.
* Max Temperature.....85-90 valleys and 60-65 ridges.
* Min Humidity........25-35 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............Southeast 5-10 mph becoming southwest up to
5 mph in the afternoon.
* Mixing Height.......1-2 kft agl until 1100. 6 kft agl after 1300.
* Transport Winds.....Variable less than 10 mph.
* Chance Lightning....0 percent.
* CWR (> 0.10 Inch)...0 percent.
.FRIDAY...Mostly clear. Lows 50-60. Highs 80-90. Min humidities
20-30 percent. East winds 5-10 mph.
.SATURDAY...Partly cloudy. Lows 55-65. Highs 75-85. Min humidities
25-35 percent. South winds 5-10 mph.
.SUNDAY...Cooler. Partly cloudy with slight chance of rain. Chance of
rain 20 percent. Lows 50-60. Highs 65-75. Southwest winds 5-15 mph.
.MONDAY...Partly cloudy with slight chance of rain. Chance of rain
20 percent. Lows 45-55. Highs 70-80.
.TUESDAY...Partly cloudy. Lows 45-55.
$$
MTZ109-172015-
Bitterroot-
204 PM MDT Tue Sep 16 2025
.TONIGHT...
* Sky/Weather.........Partly cloudy.
* Min Temperature.....35-45 valleys and 45-50 ridges.
* Max Humidity........87-97 percent valleys and 70-80 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......East 5-10 mph.
* Ridge Top............East 5-10 mph.
* Mixing Height.......6 kft agl until 1900, then 1-2 kft agl.
* Transport Winds.....East 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny.
* Max Temperature.....80-85 valleys and 65-70 ridges.
* Min Humidity........27-37 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. 7 kft agl after 1300.
* Transport Winds.....Variable less than 10 mph.
* Chance Lightning....0 percent.
* CWR (> 0.10 Inch)...0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather.........Mostly clear.
* Min Temperature.....45-50.
* Max Humidity........76-86 percent valleys and 55-65 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Downslope/downvalley 2-5 mph.
* Ridge Top............Northeast up to 5 mph becoming southeast
5-10 mph after midnight.
* Mixing Height.......4 kft agl until 2000, then below 500 ft to 1
kft agl.
* Transport Winds.....Variable less than 10 mph.
* Chance Lightning....0 percent.
* CWR (> 0.10 Inch)...0 percent.
.THURSDAY...
* Sky/Weather.........Sunny.
* Max Temperature.....85-90 valleys and 70-75 ridges.
* Min Humidity........20-30 percent.
* 20-Foot Winds.......
* Lower Elevation......Calm to variable less than 7 mph.
* Ridge Top............Southeast 5-10 mph becoming southwest up to
5 mph in the afternoon.
* Mixing Height.......2 kft agl until 1100. 7 kft agl after 1300.
* Transport Winds.....Variable less than 10 mph.
* Chance Lightning....0 percent.
* CWR (> 0.10 Inch)...0 percent.
.FRIDAY...Mostly clear. Lows 50-60. Highs 75-85. Min humidities
15-25 percent. Southeast winds 5-10 mph.
.SATURDAY...Partly cloudy. Lows 50-60. Highs 70-80. Min humidities
25-35 percent. Southwest winds 5-10 mph.
.SUNDAY...Cooler. Partly cloudy with slight chance of rain. Chance of
rain 20 percent. Lows 45-55. Highs 60-70. West winds 10-15 mph.
.MONDAY...Partly cloudy with slight chance of rain. Chance of rain
20 percent. Lows 40-50. Highs 65-75.
.TUESDAY...Mostly clear. Lows 45-55.
$$
MTZ110-111-172015-
Deerlodge/West Beaverhead-East Beaverhead-
204 PM MDT Tue Sep 16 2025
.TONIGHT...
* Sky/Weather.........Partly cloudy.
* Min Temperature.....28-38 valleys and 40-45 ridges.
* Max Humidity........98-100 percent valleys and 80-90 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......Northeast 5-15 mph in the evening becoming
downslope/downvalley 2-5 mph.
* Ridge Top............Northeast 5-15 mph.
* Mixing Height.......5 kft agl until 1900, then below 500 ft to 1
kft agl.
* Transport Winds.....Northeast 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny.
* Max Temperature.....70-75 valleys and 58-68 ridges.
* Min Humidity........26-36 percent.
* 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. 7 kft agl after 1300.
* Transport Winds.....East 10 mph.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.
.WEDNESDAY NIGHT...
* Sky/Weather.........Mostly clear.
* Min Temperature.....28-38 valleys and 40-45 ridges.
* Max Humidity........82-92 percent valleys and 61-71 percent
ridges.
* 20-Foot Winds.......
* Lower Elevation......East 5-10 mph in the evening becoming
downslope/downvalley 2-5 mph.
* Ridge Top............Northeast 5-10 mph becoming southeast after
midnight.
* Mixing Height.......4 kft agl until 2000. Below 500 ft to 1 kft
agl after 2200.
* Transport Winds.....East 10 mph until 0200, then variable less
than 10 mph.
* Chance Lightning....0 percent in the Deerlodge/West
Beaverhead...and near 0 percent in the East Beaverhead.
* CWR (> 0.10 Inch)...0 percent.
.THURSDAY...
* Sky/Weather.........Mostly sunny.
* Max Temperature.....75-80 valleys and 60-70 ridges.
* Min Humidity........18-28 percent.
* 20-Foot Winds.......
* Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in
the afternoon.
* Ridge Top............South 5-10 mph becoming west in the
afternoon.
* Mixing Height.......2 kft agl until 1100. 8 kft agl after 1600.
* Transport Winds.....Variable less than 10 mph until 1400, then
north 10 mph.
* Chance Lightning....0 percent in the Deerlodge/West
Beaverhead...and near 0 percent in the East Beaverhead.
* CWR (> 0.10 Inch)...0 percent.
.FRIDAY...Mostly clear. Lows 45-55. Highs 70-80. Min humidities
10-20 percent. South winds 5-10 mph.
.SATURDAY...Partly cloudy. Lows 45-55. Highs 70-80. Min humidities
20-30 percent. Southwest winds 10-15 mph.
.SUNDAY...Partly cloudy with slight chance of rain. Chance of rain
20 percent. Lows 45-55. Highs 65-75. Southwest winds 10-20 mph.
.MONDAY...Mostly clear. Lows 40-50. Highs 65-75.
.TUESDAY...Mostly clear. Lows 40-50.
$$