607
FNUS55 KMSO 221523
FWFMSO
FIRE WEATHER PLANNING FORECAST FOR WRN MONTANA AND N CNTRL IDAHO
NATIONAL WEATHER SERVICE MISSOULA MT
923 AM MDT SAT AUG 22 2026
...HEAT ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO 7 PM PDT THIS
EVENING FOR PORTIONS OF PALOUSE/HELLS CANYON...
...RED FLAG WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 6 AM MDT
SUNDAY FOR PORTIONS OF KOOTENAI...WEST LOLO...
...RED FLAG WARNING IN EFFECT FROM 1 PM TO 8 PM MDT SUNDAY FOR PORTIONS
OF DEERLODGE/WEST BEAVERHEAD...
DISCUSSION
IDAHO (ZONES 102 AND 103): NUMEROUS AFTERNOON AND EVENING SHOWERS AND
THUNDERSTORMS WILL FROM AND TRACK FROM SOUTHWEST TO NORTHEAST TODAY. A
MARGINAL RISK FOR SEVERE STRENGTH OUTFLOW WINDS EXISTS ALONGSIDE
FREQUENT LIGHTNING AND LOCALIZED HEAVY RAINFALL. A COLD FRONT TONIGHT
INTO SUNDAY BRINGS COOLER DAYTIME TEMPERATURES BUT DEEP BOUNDARY-LAYER
MIXING PRODUCING STRONG WESTERLY WINDS AMIDST A DRY AIRMASS RESULTING
IN ELEVATED FIRE WEATHER CONDITIONS.
NORTHWEST MT (ZONES 104 AND 105): MORNING LIGHT RAIN SHOWERS WILL GIVE
WAY TO NUMEROUS AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS TRACKING
FROM SOUTHWEST TO NORTHEAST TODAY. A MARGINAL RISK FOR SEVERE STRENGTH
OUTFLOW WINDS EXISTS ALONGSIDE FREQUENT LIGHTNING AND THE POTENTIAL FOR
NEW FIRE STARTS. A COLD FRONT TONIGHT INTO SUNDAY BRINGS COOLER DAYTIME
TEMPERATURES BUT DEEP BOUNDARY-LAYER MIXING PRODUCING STRONG WESTERLY
WINDS AMIDST A DRY AIRMASS RESULTING IN ELEVATED FIRE WEATHER
CONDITIONS.
WEST CENTRAL MT (ZONES 106, 107 AND 108): MORNING LIGHT RAIN SHOWERS
WILL GIVE WAY TO NUMEROUS AFTERNOON AND EVENING SHOWERS AND
THUNDERSTORMS TRACKING FROM SOUTHWEST TO NORTHEAST TODAY. A MARGINAL
RISK FOR SEVERE STRENGTH OUTFLOW WINDS EXISTS ALONGSIDE FREQUENT
LIGHTNING AND LOCALIZED HEAVY RAINFALL. A COLD FRONT TONIGHT INTO SUNDAY
BRINGS COOLER DAYTIME TEMPERATURES BUT DEEP BOUNDARY-LAYER MIXING
PRODUCING STRONG WESTERLY WINDS AMIDST A DRY AIRMASS RESULTING IN
WIDESPREAD ELEVATED FIRE WEATHER CONDITIONS.
SOUTHWEST MT (ZONES 109, 110 AND 111): MORNING LIGHT RAIN SHOWERS WILL
GIVE WAY TO NUMEROUS AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS
TRACKING FROM SOUTHWEST TO NORTHEAST TODAY. A MARGINAL RISK FOR SEVERE
STRENGTH OUTFLOW WINDS EXISTS ALONGSIDE FREQUENT LIGHTNING AND LOCALIZED
HEAVY RAINFALL. A COLD FRONT TONIGHT INTO SUNDAY BRINGS COOLER DAYTIME
TEMPERATURES BUT DEEP BOUNDARY-LAYER MIXING PRODUCING STRONG WESTERLY
WINDS AMIDST A VERY DRY AIRMASS RESULTING IN ELEVATED FIRE WEATHER
CONDITIONS, WITH CRITICAL FIRE WEATHER ACROSS FIRE ZONE 110. SUNDAY
AFTERNOON SHOWERS AND THUNDERSTORMS (SOME OF WHICH MAY BE STRONG TO
MARGINALLY SEVERE) WILL FOCUS IN ZONE 111.
IDZ102-231530-
PALOUSE/HELLS CANYON-
823 AM PDT SAT AUG 22 2026
...HEAT ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO 7 PM PDT THIS
EVENING...
REST OF TODAY
* SKY/WEATHER.........PARTLY CLOUDY. PATCHY SMOKE LATE IN THE
MORNING. SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....95-105 VALLEYS AND 75-80 RIDGES.
* MIN HUMIDITY........12-22 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............SOUTH 5-15 MPH.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 1100. 8 KFT AGL AFTER 1400.
* TRANSPORT WINDS.....VARIABLE LESS THAN 10 MPH UNTIL 1200, THEN
SOUTHWEST 10 MPH.
* CHANCE LIGHTNING....20 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS.
* MIN TEMPERATURE.....50-60.
* MAX HUMIDITY........59-69 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......VARIABLE LESS THAN 5 MPH IN THE EVENING
BECOMING DOWNSLOPE/DOWNVALLEY 2-5 MPH.
* RIDGE TOP............SOUTHWEST 5-10 MPH.
* MIXING HEIGHT.......7 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....WEST 10 MPH UNTIL 2000, THEN 10 MPH.
* CHANCE LIGHTNING....25 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
SUNDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING SUNNY.
* MAX TEMPERATURE.....85-95 VALLEYS AND 65-70 RIDGES.
* MIN HUMIDITY........12-22 PERCENT VALLEYS AND 28-38 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......NORTHWEST 5-15 MPH.
* RIDGE TOP............SOUTHWEST UP TO 5 MPH BECOMING WEST 5-15 MPH
IN THE AFTERNOON.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL UNTIL 0900. 8 KFT
AGL AFTER 1500.
* TRANSPORT WINDS.....WEST 10 MPH UNTIL 1400, THEN 15 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
MONDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 85-95. MIN HUMIDITIES
15-25 PERCENT. NORTHEAST WINDS 10-15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 55-65. HIGHS 90-100. MIN HUMIDITIES
10-20 PERCENT. EAST WINDS 5-10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 60-70. HIGHS 90-100. EAST WINDS
10-15 MPH.
THURSDAY
NOT AS WARM. MOSTLY CLEAR. LOWS 55-65. HIGHS 80-90.
FRIDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 80-90.
IDZ103-231530-
CLEARWATER/NEZ PERCE-
823 AM PDT SAT AUG 22 2026
REST OF TODAY
* SKY/WEATHER.........PARTLY CLOUDY. AND SLIGHT CHANCE OF RAIN.
SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....90-95 VALLEYS AND 80-85 RIDGES.
* MIN HUMIDITY........18-28 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.......2 KFT AGL UNTIL 1100, THEN 4 KFT AGL UNTIL
1200, THEN 8 KFT AGL UNTIL 1400, THEN 9 KFT AGL UNTIL 1700, THEN
6 KFT AGL.
* TRANSPORT WINDS.....SOUTH 10 MPH UNTIL 1300, THEN SOUTHWEST 10
MPH.
* CHANCE LIGHTNING....25 PERCENT OVER THE PALOUSE/HELLS
CANYON...AND 30 PERCENT TOWARD THE CLEARWATER/NEZ PERCE.
* CWR (> 0.10 INCH)...10 PERCENT.
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS.
* MIN TEMPERATURE.....50-60.
* MAX HUMIDITY........66-76 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......VARIABLE LESS THAN 5 MPH IN THE EVENING
BECOMING DOWNSLOPE/DOWNVALLEY 2-5 MPH.
* RIDGE TOP............SOUTH 5-10 MPH BECOMING SOUTHWEST AFTER
MIDNIGHT.
* MIXING HEIGHT.......5 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....SOUTH 10 MPH UNTIL 0100, THEN VARIABLE LESS
THAN 10 MPH.
* CHANCE LIGHTNING....25 PERCENT OVER THE PALOUSE/HELLS
CANYON...AND 30 PERCENT TOWARD THE CLEARWATER/NEZ PERCE.
* CWR (> 0.10 INCH)...10 PERCENT.
SUNDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....80-85 VALLEYS AND 70-75 RIDGES.
* MIN HUMIDITY........17-27 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 5-15 MPH.
* RIDGE TOP............WEST 5-15 MPH.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL UNTIL 1000. 7 KFT
AGL AFTER 1400.
* TRANSPORT WINDS.....WEST 10 MPH UNTIL 1400, THEN 15 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
MONDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 80-90. MIN HUMIDITIES
15-25 PERCENT. WEST WINDS 5-10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 55-65. HIGHS 80-90. MIN HUMIDITIES
15-25 PERCENT. SOUTHEAST WINDS 5-10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 60-70. HIGHS 80-90. SOUTHEAST WINDS
10-15 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 55-65. HIGHS 75-85.
FRIDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 75-85.
MTZ104-231530-
KOOTENAI-
923 AM MDT SAT AUG 22 2026
...RED FLAG WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 6 AM MDT
SUNDAY...
REST OF TODAY
* SKY/WEATHER.........PARTLY CLOUDY. PATCHY SMOKE LATE IN THE
MORNING. SLIGHT CHANCE OF RAIN LATE IN THE MORNING, THEN CHANCE
OF RAIN SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
* MAX TEMPERATURE.....95-100 VALLEYS AND 73-83 RIDGES.
* MIN HUMIDITY........10-20 PERCENT VALLEYS AND 27-37 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO BECOMING UPSLOPE/UPVALLEY 4-8 MPH IN
THE AFTERNOON.
* RIDGE TOP............NORTHEAST 5-10 MPH BECOMING SOUTH IN THE
AFTERNOON.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL UNTIL 1100. 9 KFT
AGL AFTER 1600.
* TRANSPORT WINDS.....NORTH 10 MPH UNTIL 1200, THEN VARIABLE LESS
THAN 10 MPH UNTIL 1300, THEN SOUTH 10 MPH.
* CHANCE LIGHTNING....20 PERCENT OVER THE KOOTENAI...AND 15 PERCENT
TOWARD THE FLATHEAD/GLACIER PARK.
* CWR (> 0.10 INCH)...10 PERCENT.
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. PATCHY SMOKE IN THE EVENING.
RAIN SHOWERS LIKELY AND SLIGHT CHANCE OF THUNDERSTORMS.
* MIN TEMPERATURE.....50-60.
* MAX HUMIDITY........90-100 PERCENT VALLEYS AND 72-82 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTHWEST 5-10 MPH.
* RIDGE TOP............SOUTHWEST 10-15 MPH.
* MIXING HEIGHT.......7 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH UNTIL 2300, THEN NORTHWEST
10 MPH UNTIL 2400, THEN SOUTHWEST 10 MPH.
* CHANCE LIGHTNING....25 PERCENT.
* CWR (> 0.10 INCH)...20 PERCENT OVER THE KOOTENAI...AND 40 PERCENT
TOWARD THE FLATHEAD/GLACIER PARK.
SUNDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....80-85 VALLEYS AND 58-68 RIDGES.
* MIN HUMIDITY........13-23 PERCENT VALLEYS AND 33-43 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTHWEST 10-20 MPH.
* RIDGE TOP............SOUTHWEST 15-25 MPH.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 1000. 8 KFT AGL AFTER 1400.
* TRANSPORT WINDS.....SOUTHWEST 15 MPH UNTIL 1200, THEN 25 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT OVER THE KOOTENAI...AND 20
PERCENT TOWARD THE FLATHEAD/GLACIER PARK.
* CWR (> 0.10 INCH)...0 PERCENT.
MONDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 75-85. MIN HUMIDITIES
15-25 PERCENT. SOUTHWEST WINDS 10-15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 55-65. HIGHS 85-95. MIN HUMIDITIES
10-20 PERCENT. DIURNAL TERRAIN WINDS TO 10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 55-65. HIGHS 85-95. EAST WINDS
5-10 MPH.
THURSDAY
NOT AS WARM. PARTLY CLOUDY. LOWS 55-65. HIGHS 75-85.
FRIDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 70-80.
MTZ105-231530-
FLATHEAD/GLACIER PARK-
923 AM MDT SAT AUG 22 2026
REST OF TODAY
* SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF RAIN. SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....85-95 VALLEYS AND 75-80 RIDGES.
* MIN HUMIDITY........21-31 PERCENT VALLEYS AND 30-40 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 1200. 7 KFT AGL AFTER 1500.
* TRANSPORT WINDS.....WEST 10 MPH UNTIL 1200. SOUTHWEST 10 MPH
AFTER 1700.
* CHANCE LIGHTNING....20 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS. CHANCE OF RAIN AFTER MIDNIGHT.
* MIN TEMPERATURE.....50-60.
* MAX HUMIDITY........99-100 PERCENT VALLEYS AND 65-75 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.
* MIXING HEIGHT.......6 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH.
* CHANCE LIGHTNING....25 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
SUNDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....75-80 VALLEYS AND 60-70 RIDGES.
* MIN HUMIDITY........14-24 PERCENT VALLEYS AND 24-34 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO VARIABLE LESS THAN 7 MPH.
* RIDGE TOP............SOUTHWEST 5-15 MPH INCREASING TO WEST 15-25
MPH IN THE AFTERNOON.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 1000. 8 KFT AGL AFTER 1400.
* TRANSPORT WINDS.....SOUTHWEST 15 MPH UNTIL 1300, THEN 25 MPH.
* CHANCE LIGHTNING....20 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
MONDAY
MOSTLY CLEAR. LOWS 45-55. HIGHS 70-80. MIN HUMIDITIES
20-30 PERCENT. SOUTHWEST WINDS 15-25 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 75-85. MIN HUMIDITIES
15-25 PERCENT. EAST WINDS 5-10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 55-65. HIGHS 80-90. SOUTHEAST WINDS
5-10 MPH.
THURSDAY
NOT AS WARM. PARTLY CLOUDY. LOWS 55-65. HIGHS 70-80.
FRIDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 65-75.
MTZ106-231530-
WEST LOLO-
923 AM MDT SAT AUG 22 2026
...RED FLAG WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 6 AM MDT
SUNDAY...
REST OF TODAY
* SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF RAIN LATE IN
THE MORNING. SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....88-98 VALLEYS AND 78-88 RIDGES.
* MIN HUMIDITY........19-29 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO VARIABLE LESS THAN 7 MPH.
* RIDGE TOP............SOUTHEAST UP TO 5 MPH BECOMING SOUTH 5-10
MPH IN THE AFTERNOON.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL UNTIL 1100. 10 KFT
AGL AFTER 1400.
* TRANSPORT WINDS.....VARIABLE LESS THAN 10 MPH UNTIL 1300, THEN
SOUTH 10 MPH UNTIL 1600, THEN SOUTHWEST 10 MPH.
* CHANCE LIGHTNING....20 PERCENT OVER THE WEST LOLO...AND 25
PERCENT TOWARD THE EAST LOLO.
* CWR (> 0.10 INCH)...10 PERCENT.
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS. SLIGHT CHANCE OF RAIN AFTER
MIDNIGHT.
* MIN TEMPERATURE.....55-60.
* MAX HUMIDITY........78-88 PERCENT VALLEYS AND 67-77 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......VARIABLE LESS THAN 5 MPH IN THE EVENING
BECOMING DOWNSLOPE/DOWNVALLEY 2-5 MPH.
* RIDGE TOP............SOUTHWEST 5-15 MPH.
* MIXING HEIGHT.......5 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH.
* CHANCE LIGHTNING....25 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
SUNDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....75-85 VALLEYS AND 68-78 RIDGES.
* MIN HUMIDITY........14-24 PERCENT VALLEYS AND 21-31 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 5-15 MPH.
* RIDGE TOP............WEST 10-20 MPH.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 1000. 8 KFT AGL AFTER 1400.
* TRANSPORT WINDS.....WEST 15 MPH UNTIL 1400, THEN 20 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
MONDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 80-90. MIN HUMIDITIES
15-25 PERCENT. SOUTHWEST WINDS 10-15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 55-65. HIGHS 85-95. MIN HUMIDITIES
10-20 PERCENT. DIURNAL TERRAIN WINDS TO 10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 60-70. HIGHS 80-90. DIURNAL TERRAIN
WINDS TO 10 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 55-65. HIGHS 75-85.
FRIDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 75-85.
MTZ108-231530-
EAST LOLO-
923 AM MDT SAT AUG 22 2026
REST OF TODAY
* SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN LATE IN
THE MORNING. SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....90-95 VALLEYS AND 75-85 RIDGES.
* MIN HUMIDITY........14-24 PERCENT VALLEYS AND 24-34 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.......2 KFT AGL UNTIL 1200. 9 KFT AGL AFTER 1500.
* TRANSPORT WINDS.....VARIABLE LESS THAN 10 MPH UNTIL 1300, THEN
SOUTHWEST 10 MPH.
* CHANCE LIGHTNING....25 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS.
* MIN TEMPERATURE.....50-55.
* MAX HUMIDITY........100 PERCENT VALLEYS AND 75-85 PERCENT RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......VARIABLE LESS THAN 5 MPH IN THE EVENING
BECOMING DOWNSLOPE/DOWNVALLEY 2-5 MPH.
* RIDGE TOP............SOUTH 5-10 MPH.
* MIXING HEIGHT.......5 KFT AGL UNTIL 1900, THEN BELOW 500 FT TO 1
KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH UNTIL 2200, THEN SOUTH 10
MPH UNTIL 0500, THEN VARIABLE LESS THAN 10 MPH.
* CHANCE LIGHTNING....25 PERCENT OVER THE WEST LOLO...AND 20
PERCENT TOWARD THE EAST LOLO.
* CWR (> 0.10 INCH)...20 PERCENT.
SUNDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....80-85 VALLEYS AND 70-75 RIDGES.
* MIN HUMIDITY........11-21 PERCENT VALLEYS AND 18-28 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO BECOMING 5-15 MPH IN THE AFTERNOON.
* RIDGE TOP............SOUTHWEST 5-10 MPH BECOMING WEST 10-20 MPH
IN THE AFTERNOON.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL UNTIL 1000. 8 KFT
AGL AFTER 1500.
* TRANSPORT WINDS.....WEST 10 MPH UNTIL 1200. 25 MPH AFTER 1600.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
MONDAY
MOSTLY CLEAR. LOWS 45-55. HIGHS 75-85. MIN HUMIDITIES
10-20 PERCENT. WEST WINDS 10-20 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 80-90. MIN HUMIDITIES
10-20 PERCENT. NORTHEAST WINDS 5-10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 55-65. HIGHS 80-90. SOUTHEAST WINDS
5-10 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 50-60. HIGHS 80-90.
FRIDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 75-85.
MTZ107-231530-
FLATHEAD RESERVATION-
923 AM MDT SAT AUG 22 2026
REST OF TODAY
* SKY/WEATHER.........MOSTLY CLOUDY. AND SLIGHT CHANCE OF RAIN.
SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....90-95 VALLEYS AND 70-75 RIDGES.
* MIN HUMIDITY........16-26 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............SOUTHWEST 5-10 MPH.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 1200. 8 KFT AGL AFTER 1500.
* TRANSPORT WINDS.....VARIABLE LESS THAN 10 MPH UNTIL 1200.
SOUTHWEST 10 MPH AFTER 1500.
* CHANCE LIGHTNING....20 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS. SLIGHT CHANCE OF RAIN AFTER
MIDNIGHT.
* MIN TEMPERATURE.....55-60.
* MAX HUMIDITY........83-93 PERCENT VALLEYS AND 73-83 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 5-10 MPH.
* RIDGE TOP............SOUTH 10-15 MPH.
* MIXING HEIGHT.......5 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH.
* CHANCE LIGHTNING....20 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
SUNDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....80-85 VALLEYS AND 60-65 RIDGES.
* MIN HUMIDITY........11-21 PERCENT VALLEYS AND 21-31 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTHWEST 5-15 MPH.
* RIDGE TOP............WEST 5-15 MPH INCREASING TO 20-30 MPH IN THE
AFTERNOON.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 1000. 9 KFT AGL AFTER 1400.
* TRANSPORT WINDS.....WEST 10 MPH UNTIL 1200, THEN 20 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
MONDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 80-90. MIN HUMIDITIES
15-25 PERCENT. SOUTHWEST WINDS 10-20 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 55-65. HIGHS 85-95. MIN HUMIDITIES
10-20 PERCENT. NORTHEAST WINDS 5-10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 60-70. HIGHS 85-95. EAST WINDS
5-10 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 55-65. HIGHS 80-90.
FRIDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 75-85.
MTZ109-231530-
BITTERROOT-
923 AM MDT SAT AUG 22 2026
REST OF TODAY
* SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN LATE IN
THE MORNING. CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....90-95 VALLEYS AND 75-80 RIDGES.
* MIN HUMIDITY........20-30 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO VARIABLE LESS THAN 7 MPH.
* RIDGE TOP............SOUTH 5-10 MPH.
* MIXING HEIGHT.......2 KFT AGL UNTIL 1100, THEN 4 KFT AGL UNTIL
1200, THEN 6 KFT AGL UNTIL 1300, THEN 9 KFT AGL UNTIL 1600, THEN
8 KFT AGL UNTIL 1700, THEN 5 KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH UNTIL 1500, THEN 10 MPH.
* CHANCE LIGHTNING....40 PERCENT OVER THE DARBY, SULA, AND WEST
FORK DISTRICTS...AND 30 PERCENT TOWARD AREAS NORTH OF HAMILTON.
* CWR (> 0.10 INCH)...10 PERCENT.
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS.
* MIN TEMPERATURE.....50-60.
* MAX HUMIDITY........87-97 PERCENT VALLEYS AND 71-81 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 5-10 MPH.
* RIDGE TOP............SOUTH 5-10 MPH.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 2000, THEN BELOW 500 FT TO
1 KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH UNTIL 2000. 10 MPH AFTER
0500.
* CHANCE LIGHTNING....30 PERCENT OVER THE DARBY, SULA, AND WEST
FORK DISTRICTS...AND 25 PERCENT TOWARD AREAS NORTH OF HAMILTON.
* CWR (> 0.10 INCH)...0 PERCENT.
SUNDAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING SUNNY.
* MAX TEMPERATURE.....85-90 VALLEYS AND 65-70 RIDGES.
* MIN HUMIDITY........13-23 PERCENT VALLEYS AND 20-30 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO BECOMING WEST 10-15 MPH IN THE
AFTERNOON.
* RIDGE TOP............SOUTHWEST 5-10 MPH BECOMING WEST 10-20 MPH
IN THE AFTERNOON.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL UNTIL 1000. 9 KFT
AGL AFTER 1400.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH UNTIL 1200, THEN 20 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
MONDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 75-85. MIN HUMIDITIES
10-20 PERCENT. WEST WINDS 10-15 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 55-65. HIGHS 80-90. MIN HUMIDITIES
15-25 PERCENT. SOUTHWEST WINDS 5-10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 55-65. HIGHS 80-90. SOUTH WINDS
5-10 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 55-65. HIGHS 75-85.
FRIDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 75-85.
MTZ111-231530-
EAST BEAVERHEAD-
923 AM MDT SAT AUG 22 2026
REST OF TODAY
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
THUNDERSTORMS.
* MAX TEMPERATURE.....85-90 VALLEYS AND 70-80 RIDGES.
* MIN HUMIDITY........23-33 PERCENT VALLEYS AND 30-40 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 5-15 MPH.
* RIDGE TOP............SOUTH 5-15 MPH.
* MIXING HEIGHT.......2 KFT AGL UNTIL 1100, THEN 4 KFT AGL UNTIL
1200, THEN 7 KFT AGL UNTIL 1400, THEN 8 KFT AGL UNTIL 1700, THEN
6 KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 15 MPH.
* CHANCE LIGHTNING....50 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
THUNDERSTORMS.
* MIN TEMPERATURE.....50-55.
* MAX HUMIDITY........97-100 PERCENT VALLEYS AND 70-80 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 5-10 MPH.
* RIDGE TOP............SOUTH 5-15 MPH.
* MIXING HEIGHT.......5 KFT AGL UNTIL 1900, THEN BELOW 500 FT TO 1
KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 15 MPH UNTIL 2100, THEN SOUTH 10
MPH.
* CHANCE LIGHTNING....50 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
SUNDAY
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
* MAX TEMPERATURE.....85-90 VALLEYS AND 70-75 RIDGES.
* MIN HUMIDITY........11-21 PERCENT VALLEYS AND 17-27 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTHWEST 15-25 MPH.
* RIDGE TOP............SOUTHWEST 15-25 MPH.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL UNTIL 1000. 11 KFT
AGL AFTER 1400.
* TRANSPORT WINDS.....SOUTH 15 MPH UNTIL 1200, THEN SOUTHWEST 25
MPH.
* CHANCE LIGHTNING....40 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
MONDAY
PARTLY CLOUDY. LOWS 50-60. HIGHS 75-85. MIN HUMIDITIES
10-20 PERCENT. SOUTHWEST WINDS 10-20 MPH.
TUESDAY
PARTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. CHANCE OF PRECIPITATION 30 PERCENT. LOWS 50-60. HIGHS
75-85. MIN HUMIDITIES 20-30 PERCENT. SOUTHWEST WINDS 5-10 MPH.
WEDNESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS AND
THUNDERSTORMS. CHANCE OF PRECIPITATION 20 PERCENT. LOWS 50-60. HIGHS
80-90. SOUTH WINDS 10-15 MPH.
THURSDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS. CHANCE OF
SHOWERS 20 PERCENT. LOWS 50-60. HIGHS 80-90.
FRIDAY
PARTLY CLOUDY. LOWS 50-60. HIGHS 75-85.
MTZ110-231530-
DEERLODGE/WEST BEAVERHEAD-
923 AM MDT SAT AUG 22 2026
..RED FLAG WARNING IN EFFECT FROM 1 PM TO 8 PM MDT SUNDAY
REST OF TODAY
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
THUNDERSTORMS.
* MAX TEMPERATURE.....85-90 VALLEYS AND 75-80 RIDGES.
* MIN HUMIDITY........25-35 PERCENT.
* 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, THEN 5 KFT AGL UNTIL
1200, THEN 7 KFT AGL UNTIL 1400, THEN 9 KFT AGL UNTIL 1700, THEN
6 KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 15 MPH.
* CHANCE LIGHTNING....40 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS.
* MIN TEMPERATURE.....40-50 VALLEYS AND 50-55 RIDGES.
* MAX HUMIDITY........96-100 PERCENT VALLEYS AND 73-83 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 5-10 MPH.
* RIDGE TOP............SOUTH 10-15 MPH.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 2000, THEN BELOW 500 FT TO
1 KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH UNTIL 0100, THEN SOUTH 10
MPH.
* CHANCE LIGHTNING....50 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
SUNDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....75-85 VALLEYS AND 70-75 RIDGES.
* MIN HUMIDITY........10-20 PERCENT VALLEYS AND 16-26 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTHWEST 10-15 MPH BECOMING WEST 15-25 MPH
IN THE AFTERNOON.
* RIDGE TOP............SOUTHWEST 15-25 MPH.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 1000. 11 KFT AGL AFTER
1400.
* TRANSPORT WINDS.....SOUTHWEST 15 MPH UNTIL 1200, THEN 25 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
MONDAY
MOSTLY CLEAR. LOWS 45-55. HIGHS 75-85. MIN HUMIDITIES
10-20 PERCENT. WEST WINDS 10-15 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 50-60. HIGHS 75-85. MIN HUMIDITIES
20-30 PERCENT. WEST WINDS 5-10 MPH.
WEDNESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS AND
THUNDERSTORMS. CHANCE OF PRECIPITATION 20 PERCENT. LOWS 50-60. HIGHS
75-85. SOUTH WINDS 10-15 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 50-60. HIGHS 75-85.
FRIDAY
PARTLY CLOUDY. LOWS 45-55. HIGHS 75-85.
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