899
FNUS55 KMSO 231001
FWFMSO
FIRE WEATHER PLANNING FORECAST FOR WRN MONTANA AND N CNTRL IDAHO
NATIONAL WEATHER SERVICE MISSOULA MT
401 AM MDT SUN AUG 23 2026
...RED FLAG WARNING IN EFFECT UNTIL 6 AM MDT EARLY THIS MORNING FOR
PORTIONS OF KOOTENAI...WEST LOLO...
...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 8 PM MDT THIS
EVENING FOR PORTIONS OF DEERLODGE/WEST BEAVERHEAD...
DISCUSSION
IDAHO (ZONES 102 AND 103): LINGERING MORNING SHOWERS WILL GIVE WAY TO A
SIGNIFICANTLY DRIER AIRMASS TODAY. A COLD FRONT BRINGS COOLER DAYTIME
TEMPERATURES, BUT DEEP BOUNDARY-LAYER MIXING WILL PRODUCE GUSTY WESTERLY
WINDS AMIDST THE DRY AIR, RESULTING IN ELEVATED FIRE WEATHER CONDITIONS.
HIGH PRESSURE REBUILDS EARLY NEXT WEEK, BRINGING TEMPERATURES BACK TO
ABOVE NORMAL, ALONG WITH THE RETURN OF POOR OVERNIGHT MID-SLOPE RELATIVE
HUMIDITY RECOVERIES.
NORTHWEST MT (ZONES 104 AND 105): LINGERING MORNING SHOWERS WILL GIVE
WAY TO A COOLER, SIGNIFICANTLY DRIER AIRMASS TODAY. DEEP BOUNDARY-
LAYER MIXING WILL PRODUCE STRONG, GUSTY WESTERLY WINDS. THIS COMBINATION
OF WIND AND DRY AIR WILL MAINTAIN ELEVATED TO CRITICAL FIRE WEATHER
CONDITIONS. A RIDGE REBUILDS MONDAY, INITIATING A WARMING TREND WITH
TEMPERATURES RETURNING TO ABOVE NORMAL. STABLE CONDITIONS WILL ALSO
ALLOW POOR OVERNIGHT RELATIVE HUMIDITY RECOVERIES TO RETURN ALONG MID-
SLOPES AND RIDGES EARLY NEXT WEEK.
WEST CENTRAL MT (ZONES 106, 107 AND 108): ISOLATED MORNING SHOWERS WILL
RAPIDLY CLEAR AS A COLD FRONT USHERS IN A MUCH DRIER AIRMASS TODAY.
COOLER DAYTIME TEMPERATURES ARE EXPECTED, BUT DEEP BOUNDARY-LAYER MIXING
WILL DRIVE GUSTY WESTERLY WINDS. THE STRONG WINDS AND DRY AIR WILL
RESULT IN ELEVATED TO CRITICAL FIRE WEATHER CONDITIONS TODAY. HIGH
PRESSURE RETURNS EARLY NEXT WEEK, BRINGING ABOVE-NORMAL TEMPERATURES AND
POOR OVERNIGHT RELATIVE HUMIDITY RECOVERIES ACROSS MID-SLOPES AND
RIDGES.
SOUTHWEST MT (ZONES 109, 110 AND 111): A COLD FRONT TODAY BRINGS COOLER
TEMPERATURES, BUT USHERS IN A VERY DRY AIRMASS. DEEP BOUNDARY-LAYER
MIXING WILL PRODUCE STRONG, GUSTY WESTERLY WINDS, RESULTING IN
WIDESPREAD CRITICAL FIRE WEATHER CONDITIONS THIS AFTERNOON AND EVENING.
AFTERNOON SHOWERS AND THUNDERSTORMS REMAIN POSSIBLE THIS AFTERNOON AND
EVENING PARTICULARLY EAST OF I-15 (ZONE 111). HIGH PRESSURE REBUILDS
MONDAY, LEADING TO ABOVE- NORMAL TEMPERATURES AND POOR OVERNIGHT MID-
SLOPE RELATIVE HUMIDITY RECOVERIES. NEAR-DAILY AFTERNOON SHOWERS AND
THUNDERSTORMS REMAIN POSSIBLE EARLY NEXT WEEK.
VIEW WEATHER BRIEFING VIDEOS ON OUR YOUTUBE CHANNEL
AT HTTPS://WWW.YOUTUBE.COM/NWSMISSOULA
IDZ102-103-241015-
PALOUSE/HELLS CANYON-CLEARWATER/NEZ PERCE-
301 AM PDT SUN AUG 23 2026
TODAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....83-93 VALLEYS AND 70-75 RIDGES.
* MIN HUMIDITY........18-28 PERCENT VALLEYS AND 26-36 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 5-15 MPH.
* RIDGE TOP............WEST 5-15 MPH.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 1000. 8 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.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....45-55.
* MAX HUMIDITY........65-75 PERCENT VALLEYS AND 56-66 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......NORTHWEST 5-10 MPH IN THE EVENING BECOMING
DOWNSLOPE/DOWNVALLEY 2-5 MPH.
* RIDGE TOP............NORTHWEST 5-15 MPH BECOMING SOUTHWEST UP TO
5 MPH AFTER MIDNIGHT.
* MIXING HEIGHT.......7 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....NORTHWEST 15 MPH UNTIL 2200, THEN VARIABLE
LESS THAN 10 MPH.
* CHANCE LIGHTNING....0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
MONDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....88-98 VALLEYS AND 75-80 RIDGES.
* MIN HUMIDITY........13-23 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO BECOMING UPSLOPE/UPVALLEY 4-8 MPH IN
THE AFTERNOON.
* RIDGE TOP............SOUTH UP TO 5 MPH BECOMING WEST 5-10 MPH IN
THE AFTERNOON.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL UNTIL 1000. 8 KFT
AGL AFTER 1600.
* TRANSPORT WINDS.....VARIABLE LESS THAN 10 MPH UNTIL 1600, THEN
WEST 10 MPH.
* CHANCE LIGHTNING....0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
TUESDAY
MOSTLY CLEAR. LOWS 55-65. HIGHS 85-95. MIN HUMIDITIES
15-25 PERCENT. EAST WINDS 5-10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 60-70. HIGHS 85-95. MIN HUMIDITIES
10-20 PERCENT. SOUTHEAST WINDS 10-15 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 55-65. HIGHS 80-90. WEST WINDS
10-15 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 80-90.
SATURDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 75-85.
MTZ104-241015-
KOOTENAI-
401 AM MDT SUN AUG 23 2026
..RED FLAG WARNING IN EFFECT UNTIL 6 AM MDT EARLY THIS MORNING
TODAY
* SKY/WEATHER.........PARTLY CLOUDY. PATCHY SMOKE IN THE MORNING.
SLIGHT CHANCE OF RAIN.
* MAX TEMPERATURE.....80-85 VALLEYS AND 58-68 RIDGES.
* MIN HUMIDITY........18-28 PERCENT VALLEYS AND 48-58 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTHWEST 10-20 MPH.
* RIDGE TOP............SOUTHWEST 10-20 MPH.
* 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....NEAR 0 PERCENT OVER THE KOOTENAI...AND 20
PERCENT TOWARD THE FLATHEAD/GLACIER PARK.
* CWR (> 0.10 INCH)...10 PERCENT.
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. PATCHY SMOKE.
* MIN TEMPERATURE.....45-55.
* MAX HUMIDITY........89-99 PERCENT VALLEYS AND 69-79 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTHWEST 5-10 MPH IN THE EVENING BECOMING
DOWNSLOPE/DOWNVALLEY 2-5 MPH.
* RIDGE TOP............WEST 15-25 MPH DECREASING TO 10-15 MPH AFTER
MIDNIGHT.
* MIXING HEIGHT.......6 KFT AGL UNTIL 2000. BELOW 500 FT TO 1 KFT
AGL AFTER 2100.
* TRANSPORT WINDS.....WEST 20 MPH UNTIL 2100, THEN 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
MONDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....85-90 VALLEYS AND 63-73 RIDGES.
* MIN HUMIDITY........14-24 PERCENT VALLEYS AND 36-46 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO VARIABLE LESS THAN 7 MPH.
* RIDGE TOP............WEST UP TO 5 MPH.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 1000. 8 KFT AGL AFTER 1400.
* TRANSPORT WINDS.....WEST 10 MPH.
* CHANCE LIGHTNING....0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
TUESDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 85-95. MIN HUMIDITIES
10-20 PERCENT. NORTHEAST WINDS 5-10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 55-65. HIGHS 85-95. MIN HUMIDITIES
15-25 PERCENT. EAST WINDS 5-10 MPH.
THURSDAY
NOT AS WARM. PARTLY CLOUDY. LOWS 55-65. HIGHS 75-85. SOUTH
WINDS 10-15 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 75-85.
SATURDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 70-80.
MTZ105-241015-
FLATHEAD/GLACIER PARK-
401 AM MDT SUN AUG 23 2026
TODAY
* SKY/WEATHER.........PARTLY CLOUDY. PATCHY SMOKE IN THE AFTERNOON.
* MAX TEMPERATURE.....75-80 VALLEYS AND 60-70 RIDGES.
* MIN HUMIDITY........21-31 PERCENT VALLEYS AND 33-43 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....15 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR. PATCHY SMOKE.
* MIN TEMPERATURE.....45-50.
* MAX HUMIDITY........100 PERCENT VALLEYS AND 61-71 PERCENT RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 5-10 MPH IN THE EVENING BECOMING
DOWNSLOPE/DOWNVALLEY 2-5 MPH.
* RIDGE TOP............WEST 15-25 MPH.
* MIXING HEIGHT.......7 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....WEST 25 MPH UNTIL 2000, THEN 15 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
MONDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....80-85 VALLEYS AND 65-70 RIDGES.
* MIN HUMIDITY........22-32 PERCENT VALLEYS AND 29-39 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 0900. 8 KFT
AGL AFTER 1300.
* TRANSPORT WINDS.....WEST 10 MPH.
* CHANCE LIGHTNING....0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
TUESDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 75-85. MIN HUMIDITIES
15-25 PERCENT. EAST WINDS 5-10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 50-60. HIGHS 80-90. MIN HUMIDITIES
15-25 PERCENT. SOUTHEAST WINDS 10-15 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 55-65. HIGHS 75-85. SOUTH WINDS
10-15 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 70-80.
SATURDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 65-75.
MTZ106-241015-
WEST LOLO-
401 AM MDT SUN AUG 23 2026
..RED FLAG WARNING IN EFFECT UNTIL 6 AM MDT EARLY THIS MORNING
TODAY
* SKY/WEATHER.........PARTLY CLOUDY. PATCHY SMOKE IN THE MORNING.
* MAX TEMPERATURE.....68-78.
* MIN HUMIDITY........23-33 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 5-15 MPH.
* RIDGE TOP............WEST 10-20 MPH.
* MIXING HEIGHT.......BELOW 500 FT TO 1 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.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....45-55.
* MAX HUMIDITY........74-84 PERCENT VALLEYS AND 51-61 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 10-15 MPH IN THE EVENING BECOMING
DOWNSLOPE/DOWNVALLEY 5-10 MPH.
* RIDGE TOP............WEST 10-20 MPH.
* MIXING HEIGHT.......6 KFT AGL UNTIL 2000. BELOW 500 FT TO 1 KFT
AGL AFTER 2100.
* TRANSPORT WINDS.....WEST 20 MPH UNTIL 2100, THEN 10 MPH.
* CHANCE LIGHTNING....0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
MONDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....80-90 VALLEYS AND 73-83 RIDGES.
* MIN HUMIDITY........19-29 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO VARIABLE LESS THAN 7 MPH.
* RIDGE TOP............SOUTHWEST UP TO 5 MPH BECOMING NORTHWEST IN
THE AFTERNOON.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL UNTIL 1000. 9 KFT
AGL AFTER 1600.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH.
* CHANCE LIGHTNING....0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
TUESDAY
MOSTLY CLEAR. LOWS 55-65. HIGHS 80-90. MIN HUMIDITIES
15-25 PERCENT. DIURNAL TERRAIN WINDS TO 10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 60-70. HIGHS 85-95. MIN HUMIDITIES
15-25 PERCENT. DIURNAL TERRAIN WINDS TO 10 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 55-65. HIGHS 80-90. SOUTHWEST WINDS
5-10 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 55-65. HIGHS 75-85.
SATURDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 75-85.
MTZ108-241015-
EAST LOLO-
401 AM MDT SUN AUG 23 2026
TODAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....80-85 VALLEYS AND 70-75 RIDGES.
* MIN HUMIDITY........12-22 PERCENT VALLEYS AND 19-29 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.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR. PATCHY SMOKE.
* MIN TEMPERATURE.....35-45 VALLEYS AND 45-50 RIDGES.
* MAX HUMIDITY........90-100 PERCENT VALLEYS AND 56-66 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 5-15 MPH IN THE EVENING BECOMING
DOWNSLOPE/DOWNVALLEY 2-5 MPH.
* RIDGE TOP............WEST 10-20 MPH.
* MIXING HEIGHT.......7 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....WEST 20 MPH UNTIL 2100, THEN 10 MPH.
* CHANCE LIGHTNING....0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
MONDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....80-85 VALLEYS AND 70-80 RIDGES.
* MIN HUMIDITY........10-20 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............WEST 5-10 MPH.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL UNTIL 1000. 8 KFT
AGL AFTER 1400.
* TRANSPORT WINDS.....WEST 10 MPH UNTIL 1600, THEN 15 MPH.
* CHANCE LIGHTNING....0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
TUESDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 80-90. MIN HUMIDITIES
10-20 PERCENT. NORTHEAST WINDS 5-10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 50-60. HIGHS 80-90. MIN HUMIDITIES
15-25 PERCENT. EAST WINDS 5-10 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 50-60. HIGHS 80-90. SOUTH WINDS
5-10 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 50-60. HIGHS 75-85.
SATURDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 75-85.
MTZ107-241015-
FLATHEAD RESERVATION-
401 AM MDT SUN AUG 23 2026
TODAY
* SKY/WEATHER.........PARTLY CLOUDY. PATCHY SMOKE IN THE MORNING.
* MAX TEMPERATURE.....80-85 VALLEYS AND 60-65 RIDGES.
* MIN HUMIDITY........18-28 PERCENT VALLEYS AND 30-40 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO BECOMING 10-15 MPH IN THE AFTERNOON.
* RIDGE TOP............SOUTHWEST 5-15 MPH INCREASING TO WEST 15-25
MPH IN THE AFTERNOON.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 1000. 9 KFT AGL AFTER 1400.
* TRANSPORT WINDS.....WEST 10 MPH UNTIL 1300, THEN 20 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....45-55.
* MAX HUMIDITY........69-79 PERCENT VALLEYS AND 55-65 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 5-15 MPH IN THE EVENING BECOMING
DOWNSLOPE/DOWNVALLEY 2-5 MPH.
* RIDGE TOP............WEST 15-25 MPH DECREASING TO 5-15 MPH AFTER
MIDNIGHT.
* MIXING HEIGHT.......8 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2100.
* TRANSPORT WINDS.....WEST 20 MPH UNTIL 2100, THEN SOUTHWEST 10
MPH.
* CHANCE LIGHTNING....0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
MONDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....85-90 VALLEYS AND 60-65 RIDGES.
* MIN HUMIDITY........16-26 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............WEST 5-10 MPH.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL UNTIL 1000. 8 KFT
AGL AFTER 1400.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH UNTIL 1500, THEN WEST 10
MPH.
* CHANCE LIGHTNING....0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
TUESDAY
MOSTLY CLEAR. LOWS 55-65. HIGHS 85-95. MIN HUMIDITIES
10-20 PERCENT. NORTHEAST WINDS 5-10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 55-65. HIGHS 85-95. MIN HUMIDITIES
15-25 PERCENT. EAST WINDS 5-10 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 55-65. HIGHS 80-90. SOUTHWEST WINDS
5-10 MPH.
FRIDAY
MOSTLY CLEAR. LOWS 55-65. HIGHS 80-90.
SATURDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 75-85.
MTZ109-241015-
BITTERROOT-
401 AM MDT SUN AUG 23 2026
TODAY
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
* MAX TEMPERATURE.....85-90 VALLEYS AND 65-70 RIDGES.
* MIN HUMIDITY........14-24 PERCENT VALLEYS AND 21-31 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO BECOMING WEST 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. 9 KFT
AGL AFTER 1500.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH UNTIL 1200, THEN 20 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....45-50.
* MAX HUMIDITY........78-88 PERCENT VALLEYS AND 52-62 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......NORTHWEST 10-15 MPH IN THE EVENING BECOMING
DOWNSLOPE/DOWNVALLEY 5-10 MPH.
* RIDGE TOP............NORTHWEST 10-20 MPH BECOMING WEST 5-10 MPH
AFTER MIDNIGHT.
* MIXING HEIGHT.......7 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....WEST 15 MPH UNTIL 2200, THEN VARIABLE LESS
THAN 10 MPH.
* CHANCE LIGHTNING....0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
MONDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....85-90 VALLEYS AND 70-75 RIDGES.
* MIN HUMIDITY........15-25 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO BECOMING UPSLOPE/UPVALLEY 4-8 MPH IN
THE AFTERNOON.
* RIDGE TOP............SOUTHWEST UP TO 5 MPH BECOMING WEST 5-10 MPH
IN THE AFTERNOON.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL UNTIL 1000. 10 KFT
AGL AFTER 1600.
* TRANSPORT WINDS.....VARIABLE LESS THAN 10 MPH UNTIL 1100, THEN
WEST 10 MPH.
* CHANCE LIGHTNING....0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
TUESDAY
PARTLY CLOUDY. LOWS 55-65. HIGHS 80-90. MIN HUMIDITIES
15-25 PERCENT. SOUTH WINDS 5-10 MPH.
WEDNESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS AND
THUNDERSTORMS. CHANCE OF PRECIPITATION 20 PERCENT. LOWS 55-65. HIGHS
80-90. MIN HUMIDITIES 15-25 PERCENT. SOUTH WINDS 5-10 MPH.
THURSDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN. CHANCE OF RAIN
20 PERCENT. LOWS 55-65. HIGHS 80-90. SOUTH WINDS 5-10 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 50-60. HIGHS 75-85.
SATURDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 75-85.
MTZ111-241015-
EAST BEAVERHEAD-
401 AM MDT SUN AUG 23 2026
TODAY
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF THUNDERSTORMS IN THE
AFTERNOON.
* MAX TEMPERATURE.....85-90 VALLEYS AND 70-75 RIDGES.
* MIN HUMIDITY........13-23 PERCENT.
* 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 1300.
* TRANSPORT WINDS.....SOUTH 15 MPH UNTIL 1200, THEN SOUTHWEST 25
MPH.
* CHANCE LIGHTNING....40 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. PATCHY SMOKE AFTER MIDNIGHT.
* MIN TEMPERATURE.....45-50.
* MAX HUMIDITY........73-83 PERCENT VALLEYS AND 45-55 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTHWEST 10-20 MPH IN THE EVENING BECOMING
DOWNSLOPE/DOWNVALLEY 5-10 MPH.
* RIDGE TOP............WEST 10-20 MPH DECREASING TO 5-10 MPH AFTER
MIDNIGHT.
* MIXING HEIGHT.......10 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....WEST 20 MPH UNTIL 2100, THEN NORTHWEST 10
MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
MONDAY
* SKY/WEATHER.........PARTLY CLOUDY. PATCHY SMOKE IN THE MORNING.
* MAX TEMPERATURE.....85-90 VALLEYS AND 70-75 RIDGES.
* MIN HUMIDITY........12-22 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO BECOMING UPSLOPE/UPVALLEY 4-8 MPH IN
THE AFTERNOON.
* RIDGE TOP............SOUTHWEST 5-15 MPH.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL UNTIL 1000. 11 KFT
AGL AFTER 1400.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH UNTIL 1200, THEN WEST 20
MPH.
* CHANCE LIGHTNING....0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
TUESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS. CHANCE OF
SHOWERS 20 PERCENT. LOWS 50-60. HIGHS 75-85. MIN HUMIDITIES
15-25 PERCENT. SOUTHWEST WINDS 5-10 MPH.
WEDNESDAY
PARTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS. CHANCE OF PRECIPITATION 30 PERCENT. LOWS
50-60. HIGHS 80-90. MIN HUMIDITIES 15-25 PERCENT. SOUTH WINDS
10-15 MPH.
THURSDAY
PARTLY CLOUDY WITH CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE
OF THUNDERSTORMS. CHANCE OF PRECIPITATION 30 PERCENT. LOWS 50-60. HIGHS
80-90. SOUTH WINDS 10-15 MPH.
FRIDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS. CHANCE OF
SHOWERS 20 PERCENT. LOWS 50-60. HIGHS 75-85.
SATURDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS. CHANCE OF
SHOWERS 20 PERCENT. LOWS 50-60. HIGHS 75-85.
MTZ110-241015-
DEERLODGE/WEST BEAVERHEAD-
401 AM MDT SUN AUG 23 2026
...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 8 PM MDT THIS
EVENING...
TODAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....75-85 VALLEYS AND 70-75 RIDGES.
* MIN HUMIDITY........11-21 PERCENT VALLEYS AND 17-27 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.......BELOW 500 FT TO 1 KFT AGL UNTIL 1000. 11 KFT
AGL AFTER 1300.
* TRANSPORT WINDS.....SOUTHWEST 15 MPH UNTIL 1200, THEN 25 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR. PATCHY SMOKE.
* MIN TEMPERATURE.....28-38 VALLEYS AND 40-45 RIDGES.
* MAX HUMIDITY........83-93 PERCENT VALLEYS AND 56-66 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 10-20 MPH IN THE EVENING BECOMING
DOWNSLOPE/DOWNVALLEY 5-10 MPH.
* RIDGE TOP............WEST 10-20 MPH DECREASING TO 5-10 MPH AFTER
MIDNIGHT.
* MIXING HEIGHT.......9 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....WEST 20 MPH UNTIL 2100. VARIABLE LESS THAN 10
MPH AFTER 0500.
* CHANCE LIGHTNING....0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
MONDAY
* SKY/WEATHER.........PARTLY CLOUDY. PATCHY SMOKE IN THE MORNING.
* MAX TEMPERATURE.....80-85 VALLEYS AND 70-75 RIDGES.
* MIN HUMIDITY........12-22 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO BECOMING 10-15 MPH IN THE AFTERNOON.
* RIDGE TOP............WEST 5-10 MPH.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 1000. 10 KFT AGL AFTER
1500.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH UNTIL 1300, THEN WEST 15
MPH.
* CHANCE LIGHTNING....0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
TUESDAY
PARTLY CLOUDY. LOWS 50-60. HIGHS 75-85. MIN HUMIDITIES
15-25 PERCENT. WEST WINDS 5-10 MPH.
WEDNESDAY
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 15-25 PERCENT. SOUTH WINDS
10-15 MPH.
THURSDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS AND
THUNDERSTORMS. CHANCE OF PRECIPITATION 20 PERCENT. LOWS 50-60. HIGHS
75-85. SOUTHWEST WINDS 10-15 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 45-55. HIGHS 75-85.
SATURDAY
PARTLY CLOUDY. LOWS 45-55. HIGHS 70-80.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page