915
FNUS55 KMSO 021720
FWFMSO
FIRE WEATHER PLANNING FORECAST FOR WRN MONTANA AND N CNTRL IDAHO
NATIONAL WEATHER SERVICE MISSOULA MT
1120 AM MDT WED SEP 2 2026
...RED FLAG WARNING IN EFFECT UNTIL 8 PM MDT THURSDAY FOR PORTIONS OF
EAST BEAVERHEAD...
...HIGH WIND WARNING IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR PORTIONS
OF EAST BEAVERHEAD...
...HIGH WIND WATCH IN EFFECT FROM 9 PM MDT THIS EVENING THROUGH
THURSDAY EVENING FOR PORTIONS OF EAST BEAVERHEAD...
DISCUSSION
IDAHO (ZONES 102 AND 103): WIDESPREAD SHOWERS AND THUNDERSTORMS WILL
CONTINUE TO MOVE NORTHEASTWARD THROUGH THE REGION TODAY, BRINGING HIGH
WETTING RAIN POTENTIAL AND GUSTY CONVECTIVE OUTFLOW WINDS OF 30-50 MPH.
A COOL, SHOWERY, AND UNSETTLED PATTERN WILL PERSIST THE REST OF THE WEEK
AND INTO THE WEEKEND UNDER PERSISTENT SOUTHWESTERLY FLOW ALOFT KEEPING
RELATIVE HUMIDITY LEVELS ABOVE CRITICAL THRESHOLDS.
NORTHWEST MT (ZONES 104 AND 105): SHOWERS AND THUNDERSTORMS WILL
DEVELOP THROUGH THE MID AFTERNOON HOURS TODAY CAPABLE OF PRODUCING
WETTING RAINS AND CONVECTIVE OUTFLOW GUSTS OF 30 TO 50 MPH WITH A LESS
THAN 10% CHANCE FOR SEVERE STRENGTH WIND GUSTS (58+ MPH). SEASONABLY
COOL TEMPERATURES AND PERIODIC SHOWER ACTIVITY WILL CONTINUE THROUGH THE
REST OF THE WEEK AND INTO THE WEEKEND UNDER PERSISTENT SOUTHWESTERLY
FLOW ALOFT.
WEST CENTRAL MT (ZONES 106, 107 AND 108): SHOWERS AND THUNDERSTORMS WILL
TRACK NORTHEASTWARD ACROSS THE AREA TODAY BRINGING MODERATE-TO-HIGH
WETTING RAIN POTENTIAL AND OUTFLOW GUSTS GENERALLY 25 TO 45 MPH WITH A
VERY LOW CHANCE FOR WIND GUSTS TO EXCEED 50 MPH THROUGH MID-AFTERNOON.
UNSETTLED AND SEASONABLY COOL CONDITIONS WITH PERIODIC SHOWER CHANCES
CONTINUE UNDER SOUTHWESTERLY FLOW ALOFT THROUGH THE REST OF THE WEEK AND
INTO THE WEEKEND.
SOUTHWEST MT (ZONES 109, 110 AND 111): STRONG SOUTH-SOUTHWEST BACKGROUND
WINDS, CONVECTIVE OUTFLOW FROM THUNDERSTORMS, AND LOW RELATIVE HUMIDITY
WILL SUSTAIN NEAR-CRITICAL TO CRITICAL FIRE WEATHER CONDITIONS THROUGH
THURSDAY EVENING ESPECIALLY IN THE EAST BEAVERHEAD AND SOUTHERN WISDOM
RANGER DISTRICT. SCATTERED THUNDERSTORMS TODAY WILL PRODUCE SPOTTY
WETTING RAIN CHANCES, HAIL, AND GUSTS OF 30 TO 50 MPH WITH A LOW CHANCE
TO SEE SEVERE-STRENGTH WIND GUSTS (58+ MPH). COOL, BREEZY IF NOT WINDY,
AND SHOWERY CONDITIONS PERSIST UNDER SOUTHWESTERLY FLOW ALOFT THROUGH
THE REST OF THE WEEK AND INTO THE WEEKEND.
IDZ102-103-031730-
PALOUSE/HELLS CANYON-CLEARWATER/NEZ PERCE-
1020 AM PDT WED SEP 2 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS.
* MIN TEMPERATURE.....45-50 VALLEYS AND 35-45 RIDGES.
* MAX HUMIDITY........78-88 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTHWEST 10-15 MPH.
* RIDGE TOP............SOUTHWEST 10-20 MPH.
* MIXING HEIGHT.......6 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....SOUTHWEST 15 MPH.
* CHANCE LIGHTNING....15 PERCENT.
* CWR (> 0.10 INCH)...60 PERCENT OVER THE PALOUSE/HELLS
CANYON...AND 10 PERCENT TOWARD THE CLEARWATER/NEZ PERCE.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. RAIN SHOWERS LIKELY. SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....63-73 VALLEYS AND 50-60 RIDGES.
* MIN HUMIDITY........59-69 PERCENT VALLEYS AND 67-77 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 1200, THEN 4 KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH.
* CHANCE LIGHTNING....20 PERCENT OVER THE PALOUSE/HELLS
CANYON...AND 25 PERCENT TOWARD THE CLEARWATER/NEZ PERCE.
* CWR (> 0.10 INCH)...70 PERCENT.
THURSDAY NIGHT
* SKY/WEATHER.........SLIGHT CHANCE OF THUNDERSTORMS IN THE
EVENING. RAIN SHOWERS.
* MIN TEMPERATURE.....45-50 VALLEYS AND 35-45 RIDGES.
* MAX HUMIDITY........79-89 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......VARIABLE LESS THAN 5 MPH IN THE EVENING
BECOMING DOWNSLOPE/DOWNVALLEY 1-3 MPH.
* RIDGE TOP............WEST UP TO 5 MPH.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL.
* TRANSPORT WINDS.....VARIABLE LESS THAN 10 MPH.
* CHANCE LIGHTNING....20 PERCENT.
* CWR (> 0.10 INCH)...90 PERCENT.
FRIDAY
* SKY/WEATHER.........MOSTLY CLOUDY. RAIN LIKELY IN THE MORNING,
THEN RAIN SHOWERS LIKELY AND SLIGHT CHANCE OF THUNDERSTORMS IN
THE AFTERNOON.
* MAX TEMPERATURE.....63-73 VALLEYS AND 50-60 RIDGES.
* MIN HUMIDITY........51-61 PERCENT VALLEYS AND 66-76 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO VARIABLE LESS THAN 7 MPH.
* RIDGE TOP............WEST UP TO 5 MPH.
* MIXING HEIGHT.......3 KFT AGL UNTIL 1200. 5 KFT AGL AFTER 1500.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH.
* CHANCE LIGHTNING....20 PERCENT OVER THE PALOUSE/HELLS
CANYON...AND 25 PERCENT TOWARD THE CLEARWATER/NEZ PERCE.
* CWR (> 0.10 INCH)...30 PERCENT OVER THE PALOUSE/HELLS
CANYON...AND 50 PERCENT TOWARD THE CLEARWATER/NEZ PERCE.
SATURDAY
PARTLY CLOUDY WITH CHANCE OF RAIN. CHANCE OF RAIN
30 PERCENT. LOWS 45-55. HIGHS 65-75. MIN HUMIDITIES 35-45 PERCENT.
VARIABLE WINDS UP TO 10 MPH.
SUNDAY
PARTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. CHANCE OF PRECIPITATION 30 PERCENT. LOWS 45-55. HIGHS
70-80. MIN HUMIDITIES 35-45 PERCENT. DIURNAL TERRAIN WINDS TO 10 MPH.
LABOR DAY
COOLER. MOSTLY CLOUDY WITH RAIN LIKELY AND SLIGHT CHANCE
OF THUNDERSTORMS. CHANCE OF PRECIPITATION 70 PERCENT. LOWS 45-55. HIGHS
60-70. VARIABLE WINDS UP TO 10 MPH.
TUESDAY
PARTLY CLOUDY WITH CHANCE OF RAIN. CHANCE OF RAIN
30 PERCENT. LOWS 45-55. HIGHS 65-75.
WEDNESDAY
PARTLY CLOUDY. LOWS 45-55. HIGHS 70-80.
MTZ104-105-031730-
KOOTENAI-FLATHEAD/GLACIER PARK-
1120 AM MDT WED SEP 2 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN.
* MIN TEMPERATURE.....40-50.
* MAX HUMIDITY........97-100 PERCENT VALLEYS AND 86-96 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 5-10 MPH BECOMING VARIABLE LESS THAN 5
MPH AFTER MIDNIGHT.
* RIDGE TOP............SOUTHWEST 10-20 MPH.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...40 PERCENT.
THURSDAY
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN.
* MAX TEMPERATURE.....60-70 VALLEYS AND 45-55 RIDGES.
* MIN HUMIDITY........41-51 PERCENT VALLEYS AND 62-72 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTHWEST 10-15 MPH.
* RIDGE TOP............SOUTHWEST 10-15 MPH.
* MIXING HEIGHT.......2 KFT AGL UNTIL 1000. 6 KFT AGL AFTER 1300.
* TRANSPORT WINDS.....SOUTHWEST 15 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
THURSDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN.
* MIN TEMPERATURE.....35-45.
* MAX HUMIDITY........90-100 PERCENT VALLEYS AND 82-92 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......VARIABLE LESS THAN 5 MPH IN THE EVENING
BECOMING DOWNSLOPE/DOWNVALLEY 1-3 MPH.
* RIDGE TOP............SOUTHWEST 5-15 MPH BECOMING EAST 5-10 MPH
AFTER MIDNIGHT.
* MIXING HEIGHT.......4 KFT AGL UNTIL 2000, THEN BELOW 500 FT TO 1
KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 15 MPH UNTIL 2000, THEN VARIABLE
LESS THAN 10 MPH UNTIL 2400, THEN WEST 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...20 PERCENT.
FRIDAY
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN.
* MAX TEMPERATURE.....60-70 VALLEYS AND 45-55 RIDGES.
* MIN HUMIDITY........43-53 PERCENT VALLEYS AND 65-75 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO BECOMING UPSLOPE/UPVALLEY 4-8 MPH IN
THE AFTERNOON.
* RIDGE TOP............WEST 5-10 MPH.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL UNTIL 1000. 5 KFT
AGL AFTER 1600.
* TRANSPORT WINDS.....VARIABLE LESS THAN 10 MPH UNTIL 0800, THEN
SOUTHWEST 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...30 PERCENT.
SATURDAY
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. CHANCE OF PRECIPITATION 50 PERCENT. LOWS 40-50. HIGHS
55-65. MIN HUMIDITIES 50-60 PERCENT. NORTH WINDS 5-10 MPH.
SUNDAY
PARTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. CHANCE OF PRECIPITATION 30 PERCENT. LOWS 40-50. HIGHS
60-70. MIN HUMIDITIES 45-55 PERCENT. NORTHEAST WINDS 5-10 MPH.
LABOR DAY
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS. CHANCE OF PRECIPITATION 50 PERCENT. LOWS
45-55. HIGHS 60-70. NORTH WINDS 5-10 MPH.
TUESDAY
MOSTLY CLOUDY WITH CHANCE OF RAIN. CHANCE OF RAIN
40 PERCENT. LOWS 45-55. HIGHS 60-70.
WEDNESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN. CHANCE OF RAIN
20 PERCENT. LOWS 45-55. HIGHS 60-70.
MTZ106-108-031730-
WEST LOLO-EAST LOLO-
1120 AM MDT WED SEP 2 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN.
* MIN TEMPERATURE.....40-45.
* MAX HUMIDITY........88-98 PERCENT VALLEYS AND 80-90 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTHWEST 10-15 MPH.
* RIDGE TOP............SOUTHWEST 10-15 MPH.
* MIXING HEIGHT.......3 KFT AGL UNTIL 2000, THEN BELOW 500 FT TO 1
KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH.
* CHANCE LIGHTNING....20 PERCENT OVER THE WEST LOLO...AND NEAR 0
PERCENT TOWARD THE EAST LOLO.
* CWR (> 0.10 INCH)...50 PERCENT OVER THE WEST LOLO...AND 0 PERCENT
TOWARD THE EAST LOLO.
THURSDAY
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN. SLIGHT CHANCE
OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....53-63.
* MIN HUMIDITY........41-51 PERCENT VALLEYS AND 53-63 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO VARIABLE LESS THAN 7 MPH.
* RIDGE TOP............SOUTHWEST 10-15 MPH.
* MIXING HEIGHT.......2 KFT AGL UNTIL 1000, THEN 5 KFT AGL UNTIL
1200, THEN 6 KFT AGL UNTIL 1700, THEN 5 KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 15 MPH.
* CHANCE LIGHTNING....20 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
THURSDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN.
* MIN TEMPERATURE.....40-45.
* MAX HUMIDITY........82-92 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......VARIABLE LESS THAN 5 MPH.
* RIDGE TOP............NORTHWEST 5-10 MPH.
* MIXING HEIGHT.......3 KFT AGL UNTIL 2000, THEN BELOW 500 FT TO 1
KFT AGL.
* TRANSPORT WINDS.....WEST 10 MPH UNTIL 2100, THEN VARIABLE LESS
THAN 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...80 PERCENT OVER THE WEST LOLO...AND 30
PERCENT TOWARD THE EAST LOLO.
FRIDAY
* SKY/WEATHER.........MOSTLY CLOUDY. PATCHY FOG IN THE MORNING.
RAIN LIKELY IN THE MORNING, THEN RAIN SHOWERS LIKELY AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....58-68 VALLEYS AND 50-60 RIDGES.
* MIN HUMIDITY........41-51 PERCENT VALLEYS AND 59-69 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO VARIABLE LESS THAN 7 MPH.
* RIDGE TOP............WEST 5-10 MPH.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL UNTIL 1000. 5 KFT
AGL AFTER 1200.
* TRANSPORT WINDS.....WEST 10 MPH.
* CHANCE LIGHTNING....15 PERCENT OVER THE WEST LOLO...AND 20
PERCENT TOWARD THE EAST LOLO.
* CWR (> 0.10 INCH)...40 PERCENT.
SATURDAY
MOSTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. CHANCE OF PRECIPITATION 50 PERCENT. LOWS 45-55. HIGHS
60-70. MIN HUMIDITIES 40-50 PERCENT. VARIABLE WINDS UP TO 10 MPH.
SUNDAY
PARTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. CHANCE OF PRECIPITATION 30 PERCENT. LOWS 45-55. HIGHS
65-75. MIN HUMIDITIES 40-50 PERCENT. NORTHEAST WINDS 5-10 MPH.
LABOR DAY
MOSTLY CLOUDY WITH RAIN SHOWERS LIKELY AND SLIGHT CHANCE
OF THUNDERSTORMS. CHANCE OF PRECIPITATION 70 PERCENT. LOWS 45-55. HIGHS
60-70. NORTHWEST WINDS 5-10 MPH.
TUESDAY
MOSTLY CLOUDY WITH CHANCE OF RAIN. CHANCE OF RAIN
40 PERCENT. LOWS 45-55. HIGHS 60-70.
WEDNESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN. CHANCE OF RAIN
20 PERCENT. LOWS 45-55. HIGHS 65-75.
MTZ107-031730-
FLATHEAD RESERVATION-
1120 AM MDT WED SEP 2 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN.
* MIN TEMPERATURE.....45-50 VALLEYS AND 35-40 RIDGES.
* MAX HUMIDITY........80-90 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 10-15 MPH.
* RIDGE TOP............SOUTH 10-15 MPH.
* MIXING HEIGHT.......3 KFT AGL UNTIL 2000, THEN BELOW 500 FT TO 1
KFT AGL.
* TRANSPORT WINDS.....SOUTH 10 MPH UNTIL 2200. SOUTHWEST 10 MPH
AFTER 0300.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...30 PERCENT.
THURSDAY
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN. CHANCE OF RAIN
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....65-70 VALLEYS AND 45-50 RIDGES.
* MIN HUMIDITY........43-53 PERCENT VALLEYS AND 73-83 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. 6 KFT AGL AFTER 1300.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH.
* CHANCE LIGHTNING....20 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT OVER AREAS WEST OF HIGHWAY
93...AND 30 PERCENT TOWARD THE MISSION MTNS AND AREAS EAST OF
HIGHWAY 93.
THURSDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN.
* MIN TEMPERATURE.....45-50 VALLEYS AND 35-40 RIDGES.
* MAX HUMIDITY........83-93 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 SOUTH AFTER
MIDNIGHT.
* MIXING HEIGHT.......4 KFT AGL UNTIL 2000, THEN BELOW 500 FT TO 1
KFT AGL.
* TRANSPORT WINDS.....WEST 10 MPH UNTIL 2100, THEN VARIABLE LESS
THAN 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...50 PERCENT.
FRIDAY
* SKY/WEATHER.........MOSTLY CLOUDY. RAIN LIKELY.
* MAX TEMPERATURE.....65-70 VALLEYS AND 45-50 RIDGES.
* MIN HUMIDITY........43-53 PERCENT VALLEYS AND 74-84 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO BECOMING UPSLOPE/UPVALLEY 4-8 MPH IN
THE AFTERNOON.
* RIDGE TOP............WEST 5-10 MPH.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL UNTIL 1000. 6 KFT
AGL AFTER 1400.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT OVER AREAS WEST OF HIGHWAY
93...AND 15 PERCENT TOWARD THE MISSION MTNS AND AREAS EAST OF
HIGHWAY 93.
* CWR (> 0.10 INCH)...30 PERCENT OVER AREAS WEST OF HIGHWAY
93...AND 50 PERCENT TOWARD THE MISSION MTNS AND AREAS EAST OF
HIGHWAY 93.
SATURDAY
MOSTLY CLOUDY WITH CHANCE OF RAIN. CHANCE OF RAIN
50 PERCENT. LOWS 45-55. HIGHS 65-75. MIN HUMIDITIES 40-50 PERCENT.
VARIABLE WINDS UP TO 10 MPH.
SUNDAY
PARTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. CHANCE OF PRECIPITATION 30 PERCENT. LOWS 45-55. HIGHS
65-75. MIN HUMIDITIES 40-50 PERCENT. NORTH WINDS 5-10 MPH.
LABOR DAY
MOSTLY CLOUDY WITH RAIN SHOWERS LIKELY AND SLIGHT CHANCE
OF THUNDERSTORMS. CHANCE OF PRECIPITATION 60 PERCENT. LOWS 50-60. HIGHS
60-70. NORTHWEST WINDS 5-10 MPH.
TUESDAY
PARTLY CLOUDY WITH CHANCE OF RAIN. CHANCE OF RAIN
40 PERCENT. LOWS 45-55. HIGHS 65-75.
WEDNESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN. CHANCE OF RAIN
20 PERCENT. LOWS 45-55. HIGHS 65-75.
MTZ109-031730-
BITTERROOT-
1120 AM MDT WED SEP 2 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....40-45.
* MAX HUMIDITY........81-91 PERCENT VALLEYS AND 68-78 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 10-15 MPH BECOMING SOUTHEAST 5-10 MPH
AFTER MIDNIGHT.
* RIDGE TOP............SOUTHWEST 5-15 MPH.
* MIXING HEIGHT.......6 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....SOUTHWEST 15 MPH UNTIL 2100, THEN 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
THURSDAY
* SKY/WEATHER.........PARTLY CLOUDY. AND SLIGHT CHANCE OF RAIN.
SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....70-75 VALLEYS AND 50-55 RIDGES.
* MIN HUMIDITY........41-51 PERCENT VALLEYS AND 53-63 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTHWEST 5-15 MPH.
* RIDGE TOP............SOUTHWEST 5-15 MPH.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL UNTIL 0900. 6 KFT
AGL AFTER 1100.
* TRANSPORT WINDS.....SOUTH 15 MPH.
* CHANCE LIGHTNING....20 PERCENT.
* CWR (> 0.10 INCH)...20 PERCENT.
THURSDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN RAIN AFTER
MIDNIGHT.
* MIN TEMPERATURE.....40-45.
* 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............SOUTH 5-10 MPH.
* MIXING HEIGHT.......3 KFT AGL UNTIL 2000, THEN BELOW 500 FT TO 1
KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 15 MPH UNTIL 2000, THEN VARIABLE
LESS THAN 10 MPH UNTIL 2200, THEN SOUTHWEST 10 MPH.
* CHANCE LIGHTNING....20 PERCENT.
* CWR (> 0.10 INCH)...80 PERCENT.
FRIDAY
* SKY/WEATHER.........CLOUDY. RAIN IN THE MORNING, THEN RAIN
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....65-70 VALLEYS AND 50-55 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.......BELOW 500 FT TO 1 KFT AGL UNTIL 1000. 6 KFT
AGL AFTER 1400.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH UNTIL 0700, THEN VARIABLE
LESS THAN 10 MPH UNTIL 0900, THEN SOUTHWEST 15 MPH.
* CHANCE LIGHTNING....25 PERCENT OVER THE DARBY, SULA, AND WEST
FORK DISTRICTS...AND 20 PERCENT TOWARD AREAS NORTH OF HAMILTON.
* CWR (> 0.10 INCH)...60 PERCENT.
SATURDAY
MOSTLY CLOUDY WITH RAIN LIKELY AND SLIGHT CHANCE OF
THUNDERSTORMS. CHANCE OF PRECIPITATION 70 PERCENT. LOWS 40-50. HIGHS
65-75. MIN HUMIDITIES 30-40 PERCENT. VARIABLE WINDS UP TO 10 MPH.
SUNDAY
PARTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. CHANCE OF PRECIPITATION 30 PERCENT. LOWS 45-55. HIGHS
65-75. MIN HUMIDITIES 35-45 PERCENT. VARIABLE WINDS UP TO 10 MPH.
LABOR DAY
MOSTLY CLOUDY WITH RAIN SHOWERS LIKELY AND SLIGHT CHANCE
OF THUNDERSTORMS. CHANCE OF PRECIPITATION 70 PERCENT. LOWS 45-55. HIGHS
60-70. NORTHWEST WINDS 5-10 MPH.
TUESDAY
MOSTLY CLOUDY WITH CHANCE OF RAIN. CHANCE OF RAIN
30 PERCENT. LOWS 45-55. HIGHS 60-70.
WEDNESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN. CHANCE OF RAIN
20 PERCENT. LOWS 45-55. HIGHS 65-75.
MTZ111-031730-
EAST BEAVERHEAD-
1120 AM MDT WED SEP 2 2026
..RED FLAG WARNING IN EFFECT UNTIL 8 PM MDT THURSDAY
..HIGH WIND WARNING IN EFFECT UNTIL 9 PM MDT THIS EVENING
...HIGH WIND WATCH IN EFFECT FROM 9 PM MDT THIS EVENING THROUGH
THURSDAY EVENING...
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....40-45.
* MAX HUMIDITY........71-81 PERCENT VALLEYS AND 50-60 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 25-35 MPH DECREASING TO 15-25 MPH
AFTER MIDNIGHT.
* RIDGE TOP............SOUTHWEST 20-30 MPH.
* MIXING HEIGHT.......9 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....SOUTHWEST 25 MPH UNTIL 2100, THEN 15 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
THURSDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....70-75 VALLEYS AND 55-60 RIDGES.
* MIN HUMIDITY........23-33 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 20-30 MPH.
* RIDGE TOP............SOUTH 20-30 MPH.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL UNTIL 0900. 9 KFT
AGL AFTER 1300.
* TRANSPORT WINDS.....SOUTHWEST 20 MPH UNTIL 1200, THEN 30 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
THURSDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....40-50.
* MAX HUMIDITY........80-90 PERCENT VALLEYS AND 52-62 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 15-25 MPH DECREASING TO 5-15 MPH AFTER
MIDNIGHT.
* RIDGE TOP............SOUTH 15-25 MPH DECREASING TO 5-15 MPH AFTER
MIDNIGHT.
* MIXING HEIGHT.......7 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....SOUTH 30 MPH UNTIL 1900. 10 MPH AFTER 2200.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
FRIDAY
* SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS.
* MAX TEMPERATURE.....75-80 VALLEYS AND 60-65 RIDGES.
* MIN HUMIDITY........21-31 PERCENT VALLEYS AND 27-37 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 10-20 MPH INCREASING TO SOUTHWEST
20-30 MPH IN THE AFTERNOON.
* RIDGE TOP............SOUTH 15-25 MPH.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL UNTIL 0900. 9 KFT
AGL AFTER 1400.
* TRANSPORT WINDS.....SOUTH 15 MPH UNTIL 1100, THEN SOUTHWEST 25
MPH.
* CHANCE LIGHTNING....15 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
SATURDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS. CHANCE OF
SHOWERS 20 PERCENT. LOWS 45-55. HIGHS 65-75. MIN HUMIDITIES
20-30 PERCENT. SOUTH WINDS 15-25 MPH.
SUNDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS. CHANCE OF
SHOWERS 20 PERCENT. LOWS 45-55. HIGHS 70-80. MIN HUMIDITIES
25-35 PERCENT. SOUTHEAST WINDS 10-20 MPH.
LABOR DAY
COOLER. MOSTLY CLOUDY WITH RAIN SHOWERS LIKELY AND SLIGHT
CHANCE OF THUNDERSTORMS. CHANCE OF PRECIPITATION 60 PERCENT. LOWS
45-55. HIGHS 60-70. SOUTH WINDS 10-20 MPH.
TUESDAY
PARTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. CHANCE OF PRECIPITATION 30 PERCENT. LOWS 40-50. HIGHS
60-70.
WEDNESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS. CHANCE
OF SHOWERS 20 PERCENT. LOWS 40-50. HIGHS 65-75.
MTZ110-031730-
DEERLODGE/WEST BEAVERHEAD-
1120 AM MDT WED SEP 2 2026
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....23-33 VALLEYS AND 35-40 RIDGES.
* MAX HUMIDITY........87-97 PERCENT VALLEYS AND 66-76 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTHWEST 10-20 MPH.
* RIDGE TOP............SOUTHWEST 10-20 MPH.
* MIXING HEIGHT.......8 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....SOUTHWEST 20 MPH UNTIL 2000, THEN 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
THURSDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....65-70 VALLEYS AND 55-60 RIDGES.
* MIN HUMIDITY........29-39 PERCENT VALLEYS AND 38-48 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTHWEST 10-20 MPH.
* RIDGE TOP............SOUTHWEST 10-20 MPH.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL UNTIL 0900. 7 KFT
AGL AFTER 1400.
* TRANSPORT WINDS.....SOUTHWEST 15 MPH UNTIL 1200, THEN 20 MPH.
* CHANCE LIGHTNING....15 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
THURSDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN IN THE EVENING.
* MIN TEMPERATURE.....28-38 VALLEYS AND 35-40 RIDGES.
* MAX HUMIDITY........95-100 PERCENT VALLEYS AND 82-92 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 10-15 MPH.
* RIDGE TOP............SOUTH 10-15 MPH.
* MIXING HEIGHT.......5 KFT AGL UNTIL 2000, THEN BELOW 500 FT TO 1
KFT AGL.
* TRANSPORT WINDS.....SOUTH 20 MPH UNTIL 2000, THEN SOUTHWEST 10
MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
FRIDAY
* SKY/WEATHER.........PARTLY CLOUDY. RAIN SHOWERS LIKELY. SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....65-70 VALLEYS AND 55-60 RIDGES.
* MIN HUMIDITY........33-43 PERCENT VALLEYS AND 43-53 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO BECOMING SOUTHWEST 10-15 MPH IN THE
AFTERNOON.
* RIDGE TOP............SOUTHWEST 5-15 MPH.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 1000. 9 KFT AGL AFTER 1300.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH UNTIL 1100, THEN 20 MPH.
* CHANCE LIGHTNING....20 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
SATURDAY
MOSTLY CLOUDY WITH RAIN LIKELY AND SLIGHT CHANCE OF
THUNDERSTORMS. CHANCE OF PRECIPITATION 70 PERCENT. LOWS 40-50. HIGHS
65-75. MIN HUMIDITIES 25-35 PERCENT. SOUTHWEST WINDS 10-15 MPH.
SUNDAY
PARTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. CHANCE OF PRECIPITATION 30 PERCENT. LOWS 40-50. HIGHS
65-75. MIN HUMIDITIES 30-40 PERCENT. NORTHEAST WINDS 5-10 MPH.
LABOR DAY
MOSTLY CLOUDY WITH RAIN SHOWERS LIKELY AND SLIGHT CHANCE
OF THUNDERSTORMS. CHANCE OF PRECIPITATION 70 PERCENT. LOWS 45-55. HIGHS
60-70. WEST WINDS 10-15 MPH.
TUESDAY
PARTLY CLOUDY WITH CHANCE OF RAIN SHOWERS. CHANCE OF SHOWERS
30 PERCENT. LOWS 40-50. HIGHS 60-70.
WEDNESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN. CHANCE OF RAIN
20 PERCENT. LOWS 40-50. HIGHS 65-75.
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