358
FNUS55 KMSO 150649
FWFMSO
FIRE WEATHER PLANNING FORECAST FOR WRN MONTANA AND N CNTRL IDAHO
NATIONAL WEATHER SERVICE MISSOULA MT
1249 AM MDT MON SEP 15 2025
DISCUSSION
IDAHO (ZONES 102 AND 103): COOL WITH SCATTERED SHOWERS TODAY. WARMING
AND DRYING TUESDAY THROUGH FRIDAY UNDER RIDGING. RELATIVELY LIGHT WINDS
MUCH OF THIS WEEK BUT AN EASTERLY GRADIENT TUESDAY THROUGH THURSDAY.
THERMAL BELTS RETURN LATE THIS WEEK.
NORTHWEST MT (ZONES 104 AND 105): COOL WITH PERIODIC SHOWERS TODAY. WARMING
AND DRYING TUESDAY THROUGH FRIDAY UNDER RIDGING. RELATIVELY LIGHT WINDS
MUCH OF THIS WEEK BUT AN EASTERLY GRADIENT TUESDAY THROUGH THURSDAY. THERMAL
BELTS RETURN LATE THIS WEEK.
WEST CENTRAL MT (ZONES 106, 107 AND 108): COOL WITH PERIODIC SHOWERS
TODAY. WARMING AND DRYING TUESDAY THROUGH FRIDAY UNDER RIDGING.
RELATIVELY LIGHT WINDS MUCH OF THIS WEEK BUT AN EASTERLY GRADIENT
TUESDAY THROUGH THURSDAY. THERMAL BELTS RETURN LATE THIS WEEK.
SOUTHWEST MT (ZONES 109, 110 AND 111): COOL WITH PERIODIC SHOWERS
TODAY. WARMING AND DRYING TUESDAY THROUGH FRIDAY UNDER RIDGING.
RELATIVELY LIGHT WINDS MUCH OF THIS WEEK BUT AN EASTERLY GRADIENT
TUESDAY THROUGH THURSDAY. THERMAL BELTS RETURN LATE THIS WEEK.
IDZ102-103-160700-
PALOUSE/HELLS CANYON-CLEARWATER/NEZ PERCE-
1149 PM PDT SUN SEP 14 2025
TODAY
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN SHOWERS.
* MAX TEMPERATURE.....65-75 VALLEYS AND 50-60 RIDGES.
* MIN HUMIDITY........48-58 PERCENT VALLEYS AND 59-69 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO VARIABLE LESS THAN 7 MPH.
* RIDGE TOP............NORTHWEST 5-10 MPH.
* MIXING HEIGHT.......3 KFT AGL UNTIL 1300, THEN 5 KFT AGL.
* TRANSPORT WINDS.....VARIABLE LESS THAN 10 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 IN THE PALOUSE/HELLS CANYON...AND
40 PERCENT IN THE CLEARWATER/NEZ PERCE.
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....40-50.
* MAX HUMIDITY........74-84 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......DOWNSLOPE/DOWNVALLEY 2-5 MPH.
* RIDGE TOP............NORTH 5-10 MPH BECOMING EAST AFTER MIDNIGHT.
* MIXING HEIGHT.......3 KFT AGL UNTIL 2000, THEN BELOW 500 FT TO 1
KFT AGL.
* TRANSPORT WINDS.....VARIABLE LESS THAN 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
TUESDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....80-90 VALLEYS AND 65-75 RIDGES.
* MIN HUMIDITY........28-38 PERCENT VALLEYS AND 35-45 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. 6 KFT AGL AFTER 1300.
* TRANSPORT WINDS.....EAST 10 MPH.
* CHANCE LIGHTNING....0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
WEDNESDAY
CLEAR. LOWS 50-60. HIGHS 80-90. MIN HUMIDITIES
15-25 PERCENT. EAST WINDS 5-10 MPH.
THURSDAY
CLEAR. LOWS 50-60. HIGHS 80-90. MIN HUMIDITIES
15-25 PERCENT. DIURNAL TERRAIN WINDS TO 10 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 50-60. HIGHS 80-90. DIURNAL TERRAIN WINDS
TO 10 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 55-65. HIGHS 80-90.
SUNDAY
NOT AS WARM. PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN
SHOWERS. CHANCE OF SHOWERS 20 PERCENT. LOWS 55-65. HIGHS 70-80.
MTZ104-105-160700-
KOOTENAI-FLATHEAD/GLACIER PARK-
1249 AM MDT MON SEP 15 2025
TODAY
* SKY/WEATHER.........MOSTLY CLOUDY. RAIN SHOWERS LIKELY. SLIGHT CHANCE
OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....60-70 VALLEYS AND 50-55 RIDGES.
* MIN HUMIDITY........58-68 PERCENT VALLEYS AND 81-91 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO VARIABLE LESS THAN 7 MPH.
* RIDGE TOP............WEST 5-15 MPH.
* MIXING HEIGHT.......3 KFT AGL UNTIL 1400, THEN 4 KFT AGL.
* TRANSPORT WINDS.....WEST 10 MPH.
* CHANCE LIGHTNING....20 PERCENT.
* CWR (> 0.10 INCH)...50 PERCENT.
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN SHOWERS. PATCHY
FOG AFTER MIDNIGHT.
* MIN TEMPERATURE.....40-50.
* MAX HUMIDITY........100 PERCENT VALLEYS AND 82-92 PERCENT RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......DOWNSLOPE/DOWNVALLEY 1-3 MPH.
* RIDGE TOP............NORTHWEST 5-10 MPH BECOMING NORTH UP TO 5
MPH AFTER MIDNIGHT.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 2100, THEN BELOW 500 FT TO
1 KFT AGL.
* TRANSPORT WINDS.....VARIABLE LESS THAN 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT IN THE KOOTENAI...AND 30 PERCENT IN
THE FLATHEAD/GLACIER PARK.
TUESDAY
* SKY/WEATHER.........PARTLY CLOUDY. PATCHY FOG IN THE MORNING.
SLIGHT CHANCE OF RAIN SHOWERS.
* MAX TEMPERATURE.....75-85 VALLEYS AND 60-70 RIDGES.
* MIN HUMIDITY........32-42 PERCENT VALLEYS AND 48-58 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO BECOMING UPSLOPE/UPVALLEY 4-8 MPH IN
THE AFTERNOON.
* RIDGE TOP............EAST UP TO 5 MPH.
* MIXING HEIGHT.......3 KFT AGL UNTIL 1100. 6 KFT AGL AFTER 1300.
* TRANSPORT WINDS.....VARIABLE LESS THAN 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
WEDNESDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 75-85. MIN HUMIDITIES
15-25 PERCENT. EAST WINDS 5-10 MPH.
THURSDAY
CLEAR. LOWS 50-60. HIGHS 75-85. MIN HUMIDITIES
15-25 PERCENT. SOUTHEAST WINDS 5-10 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 50-60. HIGHS 75-85. NORTHEAST WINDS
5-10 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 50-60. HIGHS 75-85.
SUNDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS. CHANCE OF
SHOWERS 20 PERCENT. LOWS 50-60. HIGHS 70-80.
MTZ106-108-160700-
WEST LOLO-EAST LOLO-
1249 AM MDT MON SEP 15 2025
TODAY
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS.
* MAX TEMPERATURE.....60-70 VALLEYS AND 50-60 RIDGES.
* MIN HUMIDITY........48-58 PERCENT VALLEYS AND 60-70 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO VARIABLE LESS THAN 7 MPH.
* RIDGE TOP............WEST 5-10 MPH.
* MIXING HEIGHT.......3 KFT AGL UNTIL 1100, THEN 4 KFT AGL.
* TRANSPORT WINDS.....WEST 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT IN THE WEST LOLO...AND 15
PERCENT IN THE EAST LOLO.
* CWR (> 0.10 INCH)...30 PERCENT.
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS.
PATCHY FOG AFTER MIDNIGHT.
* MIN TEMPERATURE.....40-50.
* MAX HUMIDITY........80-90 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......VARIABLE LESS THAN 5 MPH IN THE EVENING
BECOMING DOWNSLOPE/DOWNVALLEY 1-3 MPH.
* RIDGE TOP............NORTHWEST 5-10 MPH BECOMING NORTHEAST UP TO
5 MPH AFTER MIDNIGHT.
* MIXING HEIGHT.......3 KFT AGL UNTIL 2000, THEN BELOW 500 FT TO 1
KFT AGL.
* TRANSPORT WINDS.....NORTHWEST 10 MPH UNTIL 0200, THEN VARIABLE
LESS THAN 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
TUESDAY
* SKY/WEATHER.........PARTLY CLOUDY. PATCHY FOG IN THE MORNING.
* MAX TEMPERATURE.....70-80 VALLEYS AND 63-73 RIDGES.
* MIN HUMIDITY........28-38 PERCENT VALLEYS AND 41-51 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. 6 KFT AGL AFTER 1600.
* TRANSPORT WINDS.....EAST 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
WEDNESDAY
CLEAR. LOWS 45-55. HIGHS 75-85. MIN HUMIDITIES
10-20 PERCENT. DIURNAL TERRAIN WINDS TO 10 MPH.
THURSDAY
CLEAR. LOWS 50-60. HIGHS 75-85. MIN HUMIDITIES
10-20 PERCENT. DIURNAL TERRAIN WINDS TO 10 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 75-85. DIURNAL TERRAIN WINDS
TO 10 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 50-60. HIGHS 75-85.
SUNDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS. CHANCE OF
SHOWERS 20 PERCENT. LOWS 50-60. HIGHS 70-80.
MTZ107-160700-
FLATHEAD RESERVATION-
1249 AM MDT MON SEP 15 2025
TODAY
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS. SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....65-70 VALLEYS AND 45-50 RIDGES.
* MIN HUMIDITY........61-71 PERCENT VALLEYS AND 76-86 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO VARIABLE LESS THAN 7 MPH.
* RIDGE TOP............WEST 5-10 MPH IN THE MORNING.
* MIXING HEIGHT.......3 KFT AGL UNTIL 1300, THEN 4 KFT AGL.
* TRANSPORT WINDS.....WEST 10 MPH.
* CHANCE LIGHTNING....20 PERCENT IN AREAS WEST OF HIGHWAY 93...AND
15 PERCENT IN THE MISSION MTNS AND AREAS EAST OF HIGHWAY 93.
* CWR (> 0.10 INCH)...30 PERCENT IN AREAS WEST OF HIGHWAY 93...AND
50 PERCENT IN THE MISSION MTNS AND AREAS EAST OF HIGHWAY 93.
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....45-50.
* MAX HUMIDITY........81-91 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......VARIABLE LESS THAN 5 MPH IN THE EVENING
BECOMING DOWNSLOPE/DOWNVALLEY 1-3 MPH.
* RIDGE TOP............NORTHWEST 5-10 MPH BECOMING NORTHEAST UP TO
5 MPH AFTER MIDNIGHT.
* MIXING HEIGHT.......2 KFT AGL UNTIL 2000, THEN BELOW 500 FT TO 1
KFT AGL.
* TRANSPORT WINDS.....VARIABLE LESS THAN 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
TUESDAY
* SKY/WEATHER.........PARTLY CLOUDY. PATCHY FOG IN THE MORNING.
* MAX TEMPERATURE.....75-80 VALLEYS AND 55-60 RIDGES.
* MIN HUMIDITY........43-53 PERCENT VALLEYS AND 57-67 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO BECOMING UPSLOPE/UPVALLEY 4-8 MPH IN
THE AFTERNOON.
* RIDGE TOP............EAST UP TO 5 MPH.
* MIXING HEIGHT.......2 KFT AGL UNTIL 1100. 5 KFT AGL AFTER 1400.
* TRANSPORT WINDS.....VARIABLE LESS THAN 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
WEDNESDAY
CLEAR. LOWS 50-60. HIGHS 75-85. MIN HUMIDITIES
15-25 PERCENT. EAST WINDS 5-10 MPH.
THURSDAY
CLEAR. LOWS 50-60. HIGHS 80-90. MIN HUMIDITIES
20-30 PERCENT. DIURNAL TERRAIN WINDS TO 10 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 75-85. NORTHEAST WINDS
5-10 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 50-60. HIGHS 80-90.
SUNDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS. CHANCE OF
SHOWERS 20 PERCENT. LOWS 55-65. HIGHS 75-85.
MTZ109-160700-
BITTERROOT-
1249 AM MDT MON SEP 15 2025
TODAY
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS. SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....65-70 VALLEYS AND 50-55 RIDGES.
* MIN HUMIDITY........53-63 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO VARIABLE LESS THAN 7 MPH.
* RIDGE TOP............WEST 5-10 MPH.
* MIXING HEIGHT.......3 KFT AGL UNTIL 1200, THEN 5 KFT AGL.
* TRANSPORT WINDS.....WEST 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)...40 PERCENT.
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. PATCHY SMOKE IN THE EVENING.
* MIN TEMPERATURE.....35-45.
* MAX HUMIDITY........93-100 PERCENT VALLEYS AND 82-92 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......NORTH 5-10 MPH IN THE EVENING BECOMING
DOWNSLOPE/DOWNVALLEY 2-5 MPH.
* RIDGE TOP............NORTH 5-10 MPH BECOMING EAST UP TO 5 MPH
AFTER MIDNIGHT.
* MIXING HEIGHT.......3 KFT AGL UNTIL 2000, THEN 1-2 KFT AGL.
* TRANSPORT WINDS.....VARIABLE LESS THAN 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
TUESDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....75-80 VALLEYS AND 60-70 RIDGES.
* MIN HUMIDITY........34-44 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO BECOMING UPSLOPE/UPVALLEY 4-8 MPH IN
THE AFTERNOON.
* RIDGE TOP............EAST 5-10 MPH.
* MIXING HEIGHT.......3 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
MOSTLY CLEAR. LOWS 45-55. HIGHS 70-80. MIN HUMIDITIES
10-20 PERCENT. EAST WINDS 5-10 MPH.
THURSDAY
CLEAR. LOWS 45-55. HIGHS 75-85. MIN HUMIDITIES
15-25 PERCENT. SOUTHEAST WINDS 5-10 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 50-60. HIGHS 75-85. SOUTH WINDS 5-10 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 50-60. HIGHS 75-85.
SUNDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS. CHANCE OF
SHOWERS 20 PERCENT. LOWS 50-60. HIGHS 70-80.
MTZ110-111-160700-
DEERLODGE/WEST BEAVERHEAD-EAST BEAVERHEAD-
1249 AM MDT MON SEP 15 2025
TODAY
* SKY/WEATHER.........PARTLY TO MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS.
SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....55-65 VALLEYS AND 50-55 RIDGES.
* MIN HUMIDITY........47-57 PERCENT VALLEYS AND 53-63 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. 6 KFT AGL AFTER 1200.
* TRANSPORT WINDS.....WEST 10 MPH.
* CHANCE LIGHTNING....20 PERCENT IN THE DEERLODGE/WEST
BEAVERHEAD...AND 40 PERCENT IN THE EAST BEAVERHEAD.
* CWR (> 0.10 INCH)...10 PERCENT.
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS.
* MIN TEMPERATURE.....25-35 VALLEYS AND 35-40 RIDGES.
* MAX HUMIDITY........100 PERCENT VALLEYS AND 86-96 PERCENT RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......NORTHWEST 5-10 MPH BECOMING VARIABLE LESS
THAN 5 MPH AFTER MIDNIGHT.
* RIDGE TOP............NORTH 5-10 MPH.
* MIXING HEIGHT.......5 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2100.
* TRANSPORT WINDS.....NORTH 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT IN THE DEERLODGE/WEST
BEAVERHEAD...AND 20 PERCENT IN THE EAST BEAVERHEAD.
* CWR (> 0.10 INCH)...0 PERCENT.
TUESDAY
* SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS.
* MAX TEMPERATURE.....65-70 VALLEYS AND 53-63 RIDGES.
* MIN HUMIDITY........38-48 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO VARIABLE LESS THAN 7 MPH.
* RIDGE TOP............NORTHEAST 5-15 MPH.
* MIXING HEIGHT.......2 KFT AGL UNTIL 1100. 6 KFT AGL AFTER 1300.
* TRANSPORT WINDS.....NORTHEAST 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT IN THE DEERLODGE/WEST
BEAVERHEAD...AND 15 PERCENT IN THE EAST BEAVERHEAD.
* CWR (> 0.10 INCH)...0 PERCENT.
WEDNESDAY
MOSTLY CLEAR. LOWS 40-50. HIGHS 65-75. MIN HUMIDITIES
10-20 PERCENT. EAST WINDS 10-15 MPH.
THURSDAY
CLEAR. LOWS 40-50. HIGHS 70-80. MIN HUMIDITIES
10-20 PERCENT. SOUTH WINDS 5-10 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 45-55. HIGHS 70-80. SOUTH WINDS 5-10 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 45-55. HIGHS 70-80.
SUNDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS. CHANCE OF
SHOWERS 20 PERCENT. LOWS 45-55. HIGHS 70-80.
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