345
FNUS55 KMSO 192034
FWFMSO
FIRE WEATHER PLANNING FORECAST FOR WRN MONTANA AND N CNTRL IDAHO
NATIONAL WEATHER SERVICE MISSOULA MT
234 PM MDT TUE AUG 19 2025
...RED FLAG WARNING IN EFFECT FROM 1 PM TO 10 PM MDT WEDNESDAY FOR EAST
BEAVERHEAD...
DISCUSSION
IDAHO (ZONES 102 AND 103): A DRY COLD FRONT WILL PASS THROUGH ON
WEDNESDAY COOLING TEMPERATURES A FEW DEGREES, BUT ALSO INCREASING
WESTERLY TO NORTHWESTERLY WINDS. VERY DRY AIR WILL FILTER IN BEHIND THE
FRONT ON THURSDAY, DESPITE TEMPERATURES REMAINING SLIGHTLY COOLER.
WARMING TREND WILL OCCUR FRIDAY INTO THE WEEKEND AS HIGH PRESSURE
STRENGTHENS. NORTHEASTERLY WINDS WILL DEVELOP ON FRIDAY AND MAY LAST
INTO THE WEEKEND.
NORTHWEST MT (ZONES 104 AND 105): A DRY COLD FRONT WILL PASS THROUGH ON
WEDNESDAY COOLING TEMPERATURES A FEW DEGREES, BUT ALSO INCREASING
WESTERLY TO NORTHWESTERLY WINDS. VERY DRY AIR WILL FILTER IN BEHIND THE
FRONT ON THURSDAY, DESPITE TEMPERATURES REMAINING SLIGHTLY COOLER.
WARMING TREND WILL OCCUR FRIDAY INTO THE WEEKEND AS HIGH PRESSURE
STRENGTHENS. NORTHEASTERLY WINDS WILL DEVELOP ON FRIDAY AND MAY LAST
INTO THE WEEKEND.
WEST CENTRAL MT (ZONES 106, 107 AND 108): THUNDERSTORM OUTFLOW WINDS 40
TO 50 MPH ARE POSSIBLE THIS EVENING WITH STRONGER STORMS. A DRY COLD
FRONT WILL PASS THROUGH ON WEDNESDAY COOLING TEMPERATURES A FEW DEGREES,
BUT ALSO INCREASING WESTERLY TO NORTHWESTERLY WINDS. ELEVATED FIRE
WEATHER CONDITIONS DUE TO DRY, BREEZY AND UNSTABLE CONDITIONS ARE
ANTICIPATED. VERY DRY AIR WILL FILTER IN BEHIND THE FRONT ON THURSDAY,
DESPITE TEMPERATURES REMAINING SLIGHTLY COOLER. WARMING TREND WILL OCCUR
FRIDAY INTO THE WEEKEND AS HIGH PRESSURE STRENGTHENS. NORTHEASTERLY
WINDS WILL DEVELOP ON FRIDAY AND MAY LAST INTO THE WEEKEND.
BITTERROOT NF (ZONE 109): THUNDERSTORM OUTFLOW WINDS 40 TO 50 MPH ARE
POSSIBLE THIS EVENING WITH STRONGER STORMS. A DRY COLD FRONT WILL PASS
THROUGH ON WEDNESDAY COOLING TEMPERATURES A FEW DEGREES, BUT ALSO
INCREASING WESTERLY TO NORTHWESTERLY WINDS. ELEVATED FIRE WEATHER
CONDITIONS DUE TO DRY, BREEZY AND UNSTABLE CONDITIONS ARE ANTICIPATED.
VERY DRY AIR WILL FILTER IN BEHIND THE FRONT ON THURSDAY, DESPITE
TEMPERATURES REMAINING SLIGHTLY COOLER. WARMING TREND WILL OCCUR FRIDAY
INTO THE WEEKEND AS HIGH PRESSURE STRENGTHENS. NORTHEASTERLY WINDS WILL
DEVELOP ON FRIDAY AND MAY LAST INTO THE WEEKEND.
SOUTHWEST MT (ZONES 109, 110 AND 111): CRITICAL FIRE WEATHER CONDITIONS
ARE ANTICIPATED FOR WEDNESDAY DUE TO DRY, BREEZY AND VERY UNSTABLE
CONDITIONS WITH A PASSING COLD FRONT. THE MOST CRITICAL CONDITIONS ARE
ANTICIPATED IN SOUTHERN PORTIONS OF THE EAST BEAVERHEAD, WHERE A RED
FLAG WARNING HAS BEEN ISSUED. ISOLATED TO SCATTERED THUNDERSTORMS ARE
ALSO ANTICIPATED, WHICH WILL BE CAPABLE OF STRONG OUTFLOW WINDS.
WARMING TREND WILL OCCUR FRIDAY INTO THE WEEKEND AS HIGH PRESSURE
STRENGTHENS. NORTHEASTERLY WINDS WILL DEVELOP ON FRIDAY AND MAY LAST
INTO THE WEEKEND.
IDZ102-103-202045-
PALOUSE/HELLS CANYON-CLEARWATER/NEZ PERCE-
134 PM PDT TUE AUG 19 2025
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS.
* MIN TEMPERATURE.....50-60.
* MAX HUMIDITY........49-59 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......NORTHWEST 5-10 MPH.
* RIDGE TOP............NORTHWEST 5-10 MPH.
* MIXING HEIGHT.......4 KFT AGL UNTIL 2000, THEN BELOW 500 FT TO 1
KFT AGL.
* TRANSPORT WINDS.....NORTHWEST 10 MPH.
* CHANCE LIGHTNING....20 PERCENT IN THE PALOUSE/HELLS CANYON...AND
25 PERCENT IN THE CLEARWATER/NEZ PERCE.
* CWR (> 0.10 INCH)...10 PERCENT.
WEDNESDAY
* 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 VARIABLE LESS THAN 7 MPH.
* RIDGE TOP............NORTHWEST UP TO 5 MPH INCREASING TO 5-15 MPH
IN THE AFTERNOON.
* MIXING HEIGHT.......3 KFT AGL UNTIL 1100. 8 KFT AGL AFTER 1600.
* TRANSPORT WINDS.....NORTHWEST 10 MPH UNTIL 1600, THEN WEST 15
MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....48-58.
* MAX HUMIDITY........59-69 PERCENT VALLEYS AND 53-63 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.
* MIXING HEIGHT.......7 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....NORTHWEST 15 MPH UNTIL 2300, THEN VARIABLE
LESS THAN 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....90-95 VALLEYS AND 70-80 RIDGES.
* MIN HUMIDITY........12-22 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM BECOMING UPSLOPE/UPVALLEY 4-8 MPH IN
THE AFTERNOON.
* RIDGE TOP............NORTHEAST UP TO 5 MPH BECOMING NORTHWEST
5-10 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 1000. 8 KFT AGL AFTER 1500.
* TRANSPORT WINDS.....VARIABLE LESS THAN 10 MPH.
* CHANCE LIGHTNING....0 PERCENT IN THE PALOUSE/HELLS CANYON...AND
NEAR 0 PERCENT IN THE CLEARWATER/NEZ PERCE.
* CWR (> 0.10 INCH)...0 PERCENT.
FRIDAY
CLEAR. LOWS 55-65. HIGHS 85-95. MIN HUMIDITIES 15-25 PERCENT.
NORTHEAST WINDS 5-10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 55-65. HIGHS 90-100. MIN HUMIDITIES
10-20 PERCENT. NORTHEAST WINDS 5-10 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 60-70. HIGHS 90-100. NORTHEAST WINDS
5-10 MPH.
MONDAY
MOSTLY CLEAR. LOWS 60-70. HIGHS 85-95.
TUESDAY
MOSTLY CLEAR. LOWS 60-70. HIGHS 85-95.
MTZ104-105-202045-
KOOTENAI-FLATHEAD/GLACIER PARK-
234 PM MDT TUE AUG 19 2025
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
THUNDERSTORMS IN ZONES 105.
* MIN TEMPERATURE.....50-60.
* MAX HUMIDITY........75-85 PERCENT VALLEYS AND 52-62 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......DOWNSLOPE/DOWNVALLEY 1-3 MPH.
* RIDGE TOP............WEST 5-10 MPH.
* MIXING HEIGHT.......8 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....SOUTHWEST 15 MPH UNTIL 2000, THEN WEST 10
MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT IN THE KOOTENAI...AND 30
PERCENT IN THE FLATHEAD/GLACIER PARK.
* CWR (> 0.10 INCH)...0 PERCENT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....85-90 VALLEYS AND 65-75 RIDGES.
* MIN HUMIDITY........18-28 PERCENT VALLEYS AND 27-37 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO VARIABLE LESS THAN 7 MPH.
* RIDGE TOP............WEST 5-15 MPH INCREASING TO 10-20 MPH IN THE
AFTERNOON.
* MIXING HEIGHT.......2 KFT AGL UNTIL 1000. 9 KFT AGL AFTER 1400.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH UNTIL 1100. WEST 25 MPH
AFTER 1500.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
WEDNESDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....45-55.
* MAX HUMIDITY........71-81 PERCENT VALLEYS AND 56-66 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 5-10 MPH IN THE EVENING BECOMING
DOWNSLOPE/DOWNVALLEY 2-5 MPH.
* RIDGE TOP............WEST 10-20 MPH DECREASING TO 5-10 MPH AFTER
MIDNIGHT.
* MIXING HEIGHT.......8 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....WEST 20 MPH UNTIL 2200, THEN NORTHWEST 10
MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....80-90 VALLEYS AND 65-75 RIDGES.
* MIN HUMIDITY........9-19 PERCENT VALLEYS AND 15-25 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM BECOMING UPSLOPE/UPVALLEY 4-8 MPH IN
THE AFTERNOON.
* RIDGE TOP............WEST 5-10 MPH.
* MIXING HEIGHT.......3 KFT AGL UNTIL 1000. 9 KFT AGL AFTER 1500.
* TRANSPORT WINDS.....WEST 10 MPH.
* CHANCE LIGHTNING....0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
FRIDAY
MOSTLY CLEAR. LOWS 45-55. HIGHS 75-85. MIN HUMIDITIES
15-25 PERCENT. NORTHEAST WINDS 10-15 MPH.
SATURDAY
CLEAR. LOWS 50-60. HIGHS 80-90. MIN HUMIDITIES
10-20 PERCENT. NORTHEAST WINDS 10-15 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 80-90. NORTHEAST WINDS
10-15 MPH.
MONDAY
MOSTLY CLEAR. LOWS 55-65. HIGHS 80-90.
TUESDAY
MOSTLY CLEAR. LOWS 55-65. HIGHS 80-90.
MTZ106-108-202045-
WEST LOLO-EAST LOLO-
234 PM MDT TUE AUG 19 2025
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS.
* MIN TEMPERATURE.....50-60.
* MAX HUMIDITY........63-73 PERCENT VALLEYS AND 56-66 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 5-10 MPH.
* RIDGE TOP............NORTHWEST 5-10 MPH.
* MIXING HEIGHT.......8 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....WEST 10 MPH UNTIL 2100, THEN NORTHWEST 10
MPH.
* CHANCE LIGHTNING....25 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* MAX TEMPERATURE.....80-90 VALLEYS AND 73-83 RIDGES.
* MIN HUMIDITY........13-23 PERCENT VALLEYS AND 22-32 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO VARIABLE LESS THAN 7 MPH.
* RIDGE TOP............WEST 10-15 MPH.
* MIXING HEIGHT.......2 KFT AGL UNTIL 1000. 10 KFT AGL AFTER 1400.
* TRANSPORT WINDS.....WEST 10 MPH UNTIL 1300, THEN 20 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT IN THE WEST LOLO...AND 20
PERCENT IN THE EAST LOLO.
* CWR (> 0.10 INCH)...0 PERCENT.
WEDNESDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....45-55.
* MAX HUMIDITY........58-68 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 5-15 MPH.
* MIXING HEIGHT.......8 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....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....80-90 VALLEYS AND 73-83 RIDGES.
* MIN HUMIDITY........11-21 PERCENT.
* 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. 9 KFT AGL AFTER 1300.
* TRANSPORT WINDS.....WEST 10 MPH.
* CHANCE LIGHTNING....0 PERCENT IN THE WEST LOLO...AND NEAR 0
PERCENT IN THE EAST LOLO.
* CWR (> 0.10 INCH)...0 PERCENT.
FRIDAY
CLEAR. LOWS 50-60. HIGHS 80-90. MIN HUMIDITIES 10-20 PERCENT.
NORTHEAST WINDS 5-10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 80-90. MIN HUMIDITIES
15-25 PERCENT. EAST WINDS 5-10 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 85-95. EAST WINDS 5-10 MPH.
MONDAY
MOSTLY CLEAR. LOWS 55-65. HIGHS 85-95.
TUESDAY
MOSTLY CLEAR. LOWS 55-65. HIGHS 80-90.
MTZ107-202045-
FLATHEAD RESERVATION-
234 PM MDT TUE AUG 19 2025
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING.
* MIN TEMPERATURE.....55-60.
* MAX HUMIDITY........57-67 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 5-10 MPH.
* RIDGE TOP............WEST 5-10 MPH.
* MIXING HEIGHT.......9 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH UNTIL 2000, THEN WEST 10
MPH.
* CHANCE LIGHTNING....25 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
WEDNESDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....90-95 VALLEYS AND 65-70 RIDGES.
* MIN HUMIDITY........14-24 PERCENT VALLEYS AND 25-35 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM BECOMING WEST 5-15 MPH IN THE
AFTERNOON.
* RIDGE TOP............WEST 5-10 MPH INCREASING TO 10-20 MPH IN THE
AFTERNOON.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 1000. 10 KFT AGL AFTER
1400.
* TRANSPORT WINDS.....WEST 10 MPH UNTIL 1400, THEN 20 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLEAR.
* MIN TEMPERATURE.....50-55.
* MAX HUMIDITY........50-60 PERCENT.
* 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.......9 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....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....85-90 VALLEYS AND 65-70 RIDGES.
* MIN HUMIDITY........7-17 PERCENT VALLEYS AND 13-23 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM BECOMING UPSLOPE/UPVALLEY 4-8 MPH IN
THE AFTERNOON.
* RIDGE TOP............SOUTHWEST 5-10 MPH BECOMING NORTHWEST IN THE
AFTERNOON.
* MIXING HEIGHT.......2 KFT AGL UNTIL 1000. 10 KFT AGL AFTER 1400.
* TRANSPORT WINDS.....WEST 10 MPH.
* CHANCE LIGHTNING....0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
FRIDAY
CLEAR. LOWS 50-60. HIGHS 80-90. MIN HUMIDITIES 10-20 PERCENT.
NORTHEAST WINDS 10-15 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 85-95. MIN HUMIDITIES
10-20 PERCENT. NORTHEAST WINDS 10-15 MPH.
SUNDAY
MOSTLY CLEAR. LOWS 55-65. HIGHS 85-95. NORTHEAST WINDS
10-15 MPH.
MONDAY
MOSTLY CLEAR. LOWS 60-70. HIGHS 85-95.
TUESDAY
MOSTLY CLEAR. LOWS 55-65. HIGHS 85-95.
MTZ109-202045-
BITTERROOT-
234 PM MDT TUE AUG 19 2025
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS. SLIGHT CHANCE OF RAIN AFTER
MIDNIGHT.
* MIN TEMPERATURE.....50-60.
* MAX HUMIDITY........72-82 PERCENT VALLEYS AND 57-67 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......NORTHWEST 5-10 MPH.
* RIDGE TOP............NORTHWEST 5-10 MPH.
* MIXING HEIGHT.......8 KFT AGL UNTIL 1900. 1-2 KFT AGL AFTER 2000.
* TRANSPORT WINDS.....WEST 10 MPH UNTIL 1900, THEN NORTHWEST 10
MPH.
* CHANCE LIGHTNING....20 PERCENT IN THE DARBY, SULA, AND WEST FORK
DISTRICTS...AND 25 PERCENT IN AREAS NORTH OF HAMILTON.
* CWR (> 0.10 INCH)...10 PERCENT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS
IN THE AFTERNOON.
* MAX TEMPERATURE.....85-90 VALLEYS AND 75-80 RIDGES.
* MIN HUMIDITY........22-32 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM BECOMING NORTHWEST 5-15 MPH IN THE
AFTERNOON.
* RIDGE TOP............NORTHWEST UP TO 5 MPH BECOMING WEST 5-15 MPH
IN THE AFTERNOON.
* MIXING HEIGHT.......3 KFT AGL UNTIL 1100. 10 KFT AGL AFTER 1400.
* TRANSPORT WINDS.....NORTHWEST 10 MPH UNTIL 1300, THEN WEST 15
MPH.
* CHANCE LIGHTNING....20 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLEAR. SLIGHT CHANCE OF RAIN.
* MIN TEMPERATURE.....45-55.
* MAX HUMIDITY........70-80 PERCENT VALLEYS AND 55-65 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......NORTHWEST 5-15 MPH IN THE EVENING BECOMING
DOWNSLOPE/DOWNVALLEY 2-5 MPH.
* RIDGE TOP............NORTHWEST 5-15 MPH.
* MIXING HEIGHT.......8 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....NORTHWEST 15 MPH UNTIL 2400, THEN VARIABLE
LESS THAN 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....85-90 VALLEYS AND 70-75 RIDGES.
* MIN HUMIDITY........15-25 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM BECOMING UPSLOPE/UPVALLEY 4-8 MPH IN
THE AFTERNOON.
* RIDGE TOP............NORTH 5-10 MPH.
* MIXING HEIGHT.......3 KFT AGL UNTIL 1000. 9 KFT AGL AFTER 1400.
* TRANSPORT WINDS.....VARIABLE LESS THAN 10 MPH UNTIL 1100, THEN
WEST 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
FRIDAY
CLEAR. LOWS 50-60. HIGHS 80-90. MIN HUMIDITIES 15-25 PERCENT.
NORTHEAST WINDS 5-10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 80-90. MIN HUMIDITIES
15-25 PERCENT. NORTHEAST WINDS 5-10 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 55-65. HIGHS 80-90. NORTHEAST WINDS
5-10 MPH.
MONDAY
PARTLY CLOUDY. LOWS 55-65. HIGHS 80-90.
TUESDAY
PARTLY CLOUDY. LOWS 55-65. HIGHS 80-90.
MTZ111-202045-
EAST BEAVERHEAD-
234 PM MDT TUE AUG 19 2025
..RED FLAG WARNING IN EFFECT FROM 1 PM TO 10 PM MDT WEDNESDAY
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY.
* MIN TEMPERATURE.....50-55 VALLEYS AND 55-65 RIDGES.
* MAX HUMIDITY........39-49 PERCENT VALLEYS AND 17-27 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 10-20 MPH.
* RIDGE TOP............SOUTH 10-20 MPH.
* MIXING HEIGHT.......GREATER THAN 12 KFT AGL UNTIL 1900. BELOW 500
FT TO 1 KFT AGL AFTER 2000.
* TRANSPORT WINDS.....SOUTH 15 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS
IN THE AFTERNOON.
* MAX TEMPERATURE.....90-95 VALLEYS AND 75-80 RIDGES.
* MIN HUMIDITY........11-20 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTHWEST 5-15 MPH.
* RIDGE TOP............SOUTHWEST 10-20 MPH.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 1000, THEN 3 KFT AGL UNTIL
1100, THEN 7 KFT AGL UNTIL 1200, THEN GREATER THAN 12 KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 10 MPH UNTIL 1100, THEN 20 MPH.
* CHANCE LIGHTNING....15 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
WEDNESDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS
AND THUNDERSTORMS.
* MIN TEMPERATURE.....50-55.
* MAX HUMIDITY........75-85 PERCENT VALLEYS AND 55-65 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......NORTHWEST 5-15 MPH.
* RIDGE TOP............NORTHWEST 5-15 MPH.
* MIXING HEIGHT.......11 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....WEST 15 MPH UNTIL 2000, THEN NORTH 10 MPH.
* CHANCE LIGHTNING....15 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....85-90 VALLEYS AND 70-75 RIDGES.
* MIN HUMIDITY........12-22 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO VARIABLE LESS THAN 7 MPH.
* RIDGE TOP............NORTH 5-15 MPH.
* MIXING HEIGHT.......3 KFT AGL UNTIL 1000. 12 KFT AGL AFTER 1600.
* TRANSPORT WINDS.....VARIABLE LESS THAN 10 MPH UNTIL 1100, THEN
WEST 15 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
FRIDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 75-85. MIN HUMIDITIES
15-25 PERCENT. NORTH WINDS 10-15 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 50-60. HIGHS 80-90. MIN HUMIDITIES
15-25 PERCENT. NORTHEAST WINDS 10-15 MPH.
SUNDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS AND
THUNDERSTORMS. CHANCE OF PRECIPITATION 20 PERCENT. LOWS 50-60. HIGHS
80-90. NORTHEAST WINDS 10-15 MPH.
MONDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS AND
THUNDERSTORMS. CHANCE OF PRECIPITATION 20 PERCENT. LOWS 50-60. HIGHS
75-85.
TUESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS AND
THUNDERSTORMS. CHANCE OF PRECIPITATION 20 PERCENT. LOWS 50-60. HIGHS
75-85.
MTZ110-202045-
DEERLODGE/WEST BEAVERHEAD-
234 PM MDT TUE AUG 19 2025
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN AND SLIGHT
CHANCE OF THUNDERSTORMS.
* MIN TEMPERATURE.....40-50 VALLEYS AND 50-55 RIDGES.
* MAX HUMIDITY........65-75 PERCENT VALLEYS AND 43-53 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 5-15 MPH.
* RIDGE TOP............WEST 5-15 MPH.
* MIXING HEIGHT.......GREATER THAN 12 KFT AGL UNTIL 1900. BELOW 500
FT TO 1 KFT AGL AFTER 2000.
* TRANSPORT WINDS.....SOUTHWEST 15 MPH UNTIL 2000, THEN NORTHWEST
10 MPH.
* CHANCE LIGHTNING....20 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY. HAZE IN THE MORNING. SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.....73-83.
* MIN HUMIDITY........13-23 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM BECOMING WEST 5-15 MPH IN THE AFTERNOON.
* RIDGE TOP............WEST 5-15 MPH.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 1000. GREATER THAN 12 KFT
AGL AFTER 1400.
* TRANSPORT WINDS.....WEST 10 MPH UNTIL 1200, THEN 20 MPH.
* CHANCE LIGHTNING....25 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
WEDNESDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS
AND THUNDERSTORMS.
* MIN TEMPERATURE.....35-45 VALLEYS AND 45-50 RIDGES.
* MAX HUMIDITY........79-89 PERCENT VALLEYS AND 61-71 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......NORTHWEST 5-15 MPH IN THE EVENING BECOMING
DOWNSLOPE/DOWNVALLEY 2-5 MPH.
* RIDGE TOP............NORTHWEST 5-15 MPH.
* MIXING HEIGHT.......10 KFT AGL UNTIL 1900. BELOW 500 FT TO 1 KFT
AGL AFTER 2000.
* TRANSPORT WINDS.....NORTHWEST 15 MPH UNTIL 0300, THEN VARIABLE
LESS THAN 10 MPH.
* CHANCE LIGHTNING....20 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* MAX TEMPERATURE.....80-85 VALLEYS AND 70-75 RIDGES.
* MIN HUMIDITY........14-24 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......CALM TO VARIABLE LESS THAN 7 MPH.
* RIDGE TOP............NORTHWEST 5-10 MPH.
* MIXING HEIGHT.......2 KFT AGL UNTIL 1000. 10 KFT AGL AFTER 1500.
* TRANSPORT WINDS.....VARIABLE LESS THAN 10 MPH UNTIL 1100, THEN
WEST 10 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
FRIDAY
MOSTLY CLEAR. LOWS 45-55. HIGHS 75-85. MIN HUMIDITIES
15-25 PERCENT. NORTHEAST WINDS 5-10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 45-55. HIGHS 80-90. MIN HUMIDITIES
10-20 PERCENT. NORTHEAST WINDS 5-10 MPH.
SUNDAY
PARTLY CLOUDY. LOWS 50-60. HIGHS 75-85. NORTHEAST WINDS
10-15 MPH.
MONDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS AND
THUNDERSTORMS. CHANCE OF PRECIPITATION 20 PERCENT. LOWS 50-60. HIGHS
75-85.
TUESDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN SHOWERS AND
THUNDERSTORMS. CHANCE OF PRECIPITATION 20 PERCENT. LOWS 50-60. HIGHS
75-85.
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