277
FNUS55 KMSO 162141
FWFMSO
FIRE WEATHER PLANNING FORECAST FOR WRN MONTANA AND N CNTRL IDAHO
NATIONAL WEATHER SERVICE MISSOULA MT
241 PM MST TUE DEC 16 2025
DISCUSSION
IDAHO (ZONES 102 AND 103): ATMOSPHERIC RIVER IMPACTS: AN
ATMOSPHERIC RIVER WILL BRING WIDESPREAD RAIN AND HIGH-ELEVATION
SNOW TODAY THROUGH WEDNESDAY DAY. SATURATED SOILS WILL LIKELY
CAUSE RISES ON STREAMS AND ROCKSLIDES IN STEEP TERRAIN,
PARTICULARLY IN NORTHWEST MONTANA AND NORTH-CENTRAL IDAHO. TAKING
A QUICK LOOK AT THE NEXT 48 HOURS... TONIGHT'S WEATHER, SLIGHT
CHANCE OF RAIN UNTIL MIDNIGHT, THEN RAIN LIKELY AFTER MIDNIGHT.
PATCHY BLOWING SNOW AFTER MIDNIGHT. VISIBILITY ONE QUARTER MILE OR
LESS AT TIMES AFTER MIDNIGHT. WEDNESDAY, RAIN SHOWERS LIKELY WITH
POSSIBLE SNOW AND THUNDERSTORMS IN THE DAY, THEN A CHANCE OF SNOW IN
THE AFTERNOON. BLOWING SNOW IN THE DAY. PATCHY BLOWING SNOW IN THE
AFTERNOON. SOME THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL. SNOW MAY BE
HEAVY AT TIMES IN THE DAY. VISIBILITY ONE QUARTER MILE OR LESS AT
TIMES. SNOW LEVEL 3500 FEET. WEDNESDAY NIGHT, MOSTLY CLOUDY WITH A
50 PERCENT CHANCE OF SNOW. THURSDAY, SNOW LIKELY IN THE DAY, THEN
RAIN AND SNOW LIKELY IN THE AFTERNOON. SNOW LEVEL 3000 FEET.
NORTHWEST MT (ZONES 104 AND 105): ATMOSPHERIC RIVER IMPACTS: AN
ATMOSPHERIC RIVER WILL BRING WIDESPREAD RAIN AND HIGH-ELEVATION
SNOW TODAY THROUGH WEDNESDAY DAY. SATURATED SOILS WILL LIKELY
CAUSE RISES ON STREAMS AND ROCKSLIDES IN STEEP TERRAIN,
PARTICULARLY IN NORTHWEST MONTANA AND NORTH-CENTRAL IDAHO. TAKING
A QUICK LOOK AT THE NEXT 48 HOURS... TONIGHT'S WEATHER, RAIN AND
SNOW LIKELY. PATCHY BLOWING SNOW UNTIL MIDNIGHT. BLOWING SNOW AFTER
MIDNIGHT. SNOW MAY BE HEAVY AT TIMES. VISIBILITY ONE QUARTER MILE OR
LESS AT TIMES. WEDNESDAY, RAIN LIKELY AND A CHANCE OF SNOW IN THE
DAY, THEN A CHANCE OF SNOW IN THE AFTERNOON. BLOWING SNOW IN THE DAY.
PATCHY BLOWING SNOW IN THE AFTERNOON. SNOW MAY BE HEAVY AT TIMES IN
THE DAY. VISIBILITY ONE QUARTER MILE OR LESS AT TIMES. SNOW LEVEL
3000 FEET. WEDNESDAY NIGHT, MOSTLY CLOUDY WITH A 50 PERCENT CHANCE
OF SNOW. PATCHY BLOWING SNOW UNTIL MIDNIGHT. VISIBILITY ONE QUARTER
MILE OR LESS AT TIMES UNTIL MIDNIGHT. THURSDAY, A CHANCE OF SNOW IN
THE DAY, THEN SNOW LIKELY IN THE AFTERNOON.
WEST CENTRAL MT (ZONES 106, 107 AND 108): ATMOSPHERIC RIVER
IMPACTS: AN ATMOSPHERIC RIVER WILL BRING WIDESPREAD RAIN AND
HIGH-ELEVATION SNOW TODAY THROUGH WEDNESDAY DAY. SATURATED SOILS
WILL LIKELY CAUSE RISES ON STREAMS AND ROCKSLIDES IN STEEP
TERRAIN, PARTICULARLY IN NORTHWEST MONTANA AND NORTH-CENTRAL
IDAHO. TAKING A QUICK LOOK AT THE NEXT 48 HOURS... TONIGHT'S
WEATHER, AREAS OF RAIN AND SNOW UNTIL MIDNIGHT, THEN RAIN AND SNOW
LIKELY AFTER MIDNIGHT. PATCHY BLOWING SNOW UNTIL MIDNIGHT, THEN
BLOWING SNOW AFTER MIDNIGHT. VISIBILITY ONE QUARTER MILE OR LESS AT
TIMES. SNOW MAY BE HEAVY AT TIMES. WEDNESDAY, A CHANCE OF SNOW.
BLOWING SNOW IN THE DAY. PATCHY BLOWING SNOW IN THE AFTERNOON. RAIN
LIKELY IN THE DAY. VISIBILITY ONE QUARTER MILE OR LESS AT TIMES. SNOW
LEVEL 3500 FEET. TEMPERATURES STEADY OR FALLING INTO THE UPPER 20S IN
THE AFTERNOON. WEDNESDAY NIGHT, MOSTLY CLOUDY. A 50 PERCENT CHANCE
OF SNOW UNTIL MIDNIGHT. PATCHY BLOWING SNOW UNTIL MIDNIGHT.
VISIBILITY ONE QUARTER MILE OR LESS AT TIMES UNTIL MIDNIGHT.
THURSDAY, SLIGHT CHANCE OF SNOW IN THE DAY, THEN SNOW LIKELY IN THE
AFTERNOON.
SOUTHWEST MT (ZONES 109, 110 AND 111): ATMOSPHERIC RIVER IMPACTS:
AN ATMOSPHERIC RIVER WILL BRING WIDESPREAD RAIN AND HIGH-ELEVATION
SNOW TODAY THROUGH WEDNESDAY DAY. SATURATED SOILS WILL LIKELY
CAUSE RISES ON STREAMS AND ROCKSLIDES IN STEEP TERRAIN,
PARTICULARLY IN NORTHWEST MONTANA AND NORTH-CENTRAL IDAHO. TAKING
A QUICK LOOK AT THE NEXT 48 HOURS... TONIGHT'S WEATHER, MOSTLY
CLOUDY. PATCHY BLOWING SNOW THROUGH THE NIGHT. A 50 PERCENT CHANCE OF
AREAS OF RAIN AND SNOW AFTER MIDNIGHT. VISIBILITY ONE QUARTER MILE OR
LESS AT TIMES. WEDNESDAY, RAIN LIKELY AND A CHANCE OF SNOW IN THE
DAY, THEN A CHANCE OF SNOW IN THE AFTERNOON. BLOWING SNOW IN THE DAY.
PATCHY BLOWING SNOW IN THE AFTERNOON. SNOW MAY BE HEAVY AT TIMES IN
THE DAY. VISIBILITY ONE QUARTER MILE OR LESS AT TIMES. TEMPERATURES
STEADY OR FALLING INTO THE MID 20S IN THE AFTERNOON. WEDNESDAY NIGHT,
MOSTLY CLOUDY. A 20 PERCENT CHANCE OF SNOW UNTIL MIDNIGHT. PATCHY
BLOWING SNOW UNTIL MIDNIGHT. VISIBILITY ONE QUARTER MILE OR LESS AT
TIMES UNTIL MIDNIGHT. THURSDAY, A CHANCE OF SNOW IN THE DAY, THEN
SNOW LIKELY IN THE AFTERNOON. IT'LL BE COLDER.
IDZ102-103-171100-
PALOUSE/HELLS CANYON-CLEARWATER/NEZ PERCE-
141 PM PST TUE DEC 16 2025
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. RAIN. PATCHY BLOWING SNOW
AFTER MIDNIGHT. SNOW LEVEL 7000 FEET.
* MIN TEMPERATURE.....30-40 VALLEYS AND 20-30 RIDGES.
* MAX HUMIDITY........77-87 PERCENT VALLEYS AND 87-96 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 20-30 MPH.
* RIDGE TOP............SOUTHWEST 30-40 MPH.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 20 MPH UNTIL 0400, THEN 25 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...80 PERCENT.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY. BLOWING SNOW IN THE MORNING.
PATCHY BLOWING SNOW IN THE AFTERNOON. RAIN SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE MORNING. CHANCE OF SNOW. SNOW
LEVEL 3500 FEET.
* MAX TEMPERATURE.....48-58 VALLEYS AND 35-40 RIDGES.
* MIN HUMIDITY........55-65 PERCENT VALLEYS AND 69-79 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 25-35 MPH.
* RIDGE TOP............WEST 35-45 MPH DECREASING TO 25-35 MPH IN
THE AFTERNOON.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 0800. 5 KFT AGL AFTER 1200.
* TRANSPORT WINDS.....WEST 35 MPH UNTIL 0800, THEN 40 MPH UNTIL
1600, THEN 30 MPH.
* CHANCE LIGHTNING....15 PERCENT IN THE PALOUSE/HELLS CANYON...AND
20 PERCENT IN THE CLEARWATER/NEZ PERCE.
* CWR (> 0.10 INCH)...70 PERCENT IN THE PALOUSE/HELLS CANYON...AND
100 PERCENT IN THE CLEARWATER/NEZ PERCE.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SNOW.
* MIN TEMPERATURE.....30-35 VALLEYS AND 20-30 RIDGES.
* MAX HUMIDITY........71-81 PERCENT VALLEYS AND 83-93 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTHWEST 5-15 MPH.
* RIDGE TOP............WEST 25-35 MPH BECOMING SOUTHWEST 10-20 MPH
AFTER MIDNIGHT.
* MIXING HEIGHT.......2 KFT AGL UNTIL 2200, THEN 1-2 KFT AGL.
* TRANSPORT WINDS.....WEST 25 MPH UNTIL 2200, THEN SOUTHWEST 15
MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT IN THE PALOUSE/HELLS CANYON...AND
20 PERCENT IN THE CLEARWATER/NEZ PERCE.
THURSDAY
* SKY/WEATHER.........SNOW. RAIN IN THE AFTERNOON. SNOW LEVEL 3000
FEET.
* MAX TEMPERATURE.....43-53 VALLEYS AND 35-40 RIDGES.
* MIN HUMIDITY........68-78 PERCENT VALLEYS AND 80-90 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 5-15 MPH.
* RIDGE TOP............SOUTH 10-20 MPH.
* MIXING HEIGHT.......1-2 KFT AGL.
* TRANSPORT WINDS.....SOUTH 15 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...90 PERCENT.
FRIDAY
RAIN AND SNOW. PATCHY BLOWING SNOW. CHANCE OF PRECIPITATION
NEAR 100 PERCENT. LOWS 35-45. HIGHS 40-50. MIN HUMIDITIES
60-70 PERCENT. SOUTHWEST WINDS 10-20 MPH.
SATURDAY
MOSTLY CLOUDY WITH CHANCE OF SNOW. CHANCE OF SNOW
50 PERCENT. LOWS 25-35. HIGHS 35-45. MIN HUMIDITIES 60-70 PERCENT.
SOUTHWEST WINDS 5-15 MPH.
SUNDAY
MOSTLY CLOUDY WITH CHANCE OF SNOW AND RAIN. CHANCE OF
PRECIPITATION 30 PERCENT. LOWS 25-35. HIGHS 35-45. SOUTH WINDS
10-15 MPH.
MONDAY
MOSTLY CLOUDY WITH RAIN AND SNOW LIKELY. CHANCE OF
PRECIPITATION 70 PERCENT. LOWS 30-40. HIGHS 40-50.
TUESDAY
MOSTLY CLOUDY WITH CHANCE OF RAIN AND SNOW. CHANCE OF
PRECIPITATION 40 PERCENT. LOWS 30-40. HIGHS 40-50.
MTZ104-105-171100-
KOOTENAI-FLATHEAD/GLACIER PARK-
241 PM MST TUE DEC 16 2025
TONIGHT
* SKY/WEATHER.........PATCHY BLOWING SNOW IN THE EVENING. BLOWING
SNOW AFTER MIDNIGHT. RAIN AND SNOW. SNOW LEVEL 5500 FEET.
* MIN TEMPERATURE.....30-35 VALLEYS AND 20-30 RIDGES.
* MAX HUMIDITY........93-100 PERCENT VALLEYS AND 84-94 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 30-40 MPH.
* RIDGE TOP............SOUTH 35-45 MPH.
* MIXING HEIGHT.......1-2 KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 25 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...100 PERCENT.
WEDNESDAY
* SKY/WEATHER.........BLOWING SNOW IN THE MORNING. PATCHY BLOWING
SNOW IN THE AFTERNOON. RAIN IN THE MORNING. CHANCE OF SNOW. SNOW
LEVEL 3000 FEET.
* MAX TEMPERATURE.....40-45 VALLEYS AND 30-40 RIDGES.
* MIN HUMIDITY........54-64 PERCENT VALLEYS AND 66-76 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 35-45 MPH.
* RIDGE TOP............WEST 35-45 MPH.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 0800. 5 KFT AGL AFTER 1100.
* TRANSPORT WINDS.....SOUTHWEST 35 MPH UNTIL 0800, THEN WEST 50 MPH
UNTIL 1600, THEN 40 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...90 PERCENT.
WEDNESDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY. PATCHY BLOWING SNOW IN THE
EVENING. CHANCE OF SNOW.
* MIN TEMPERATURE.....20-30.
* MAX HUMIDITY........85-95 PERCENT VALLEYS AND 79-89 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 5-15 MPH BECOMING VARIABLE LESS THAN 5
MPH AFTER MIDNIGHT.
* RIDGE TOP............WEST 40-50 MPH DECREASING TO 20-30 MPH AFTER
MIDNIGHT.
* MIXING HEIGHT.......3 KFT AGL UNTIL 2000, THEN 1-2 KFT AGL.
* TRANSPORT WINDS.....WEST 35 MPH UNTIL 2000. SOUTHWEST 15 MPH
AFTER 0200.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. SNOW.
* MAX TEMPERATURE.....35-45 VALLEYS AND 30-35 RIDGES.
* MIN HUMIDITY........69-79 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 10-20 MPH.
* RIDGE TOP............SOUTH 10-20 MPH.
* MIXING HEIGHT.......2 KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 20 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...70 PERCENT IN THE KOOTENAI...AND 40 PERCENT
IN THE FLATHEAD/GLACIER PARK.
FRIDAY
SNOW. PATCHY BLOWING SNOW. CHANCE OF SNOW NEAR 100 PERCENT.
LOWS 25-35. HIGHS 35-45. MIN HUMIDITIES 60-70 PERCENT. SOUTHWEST WINDS
25-35 MPH.
SATURDAY
MOSTLY CLOUDY WITH SNOW LIKELY. CHANCE OF SNOW 70 PERCENT.
LOWS 20-30. HIGHS 30-40. MIN HUMIDITIES 65-75 PERCENT. SOUTHWEST WINDS
10-20 MPH.
SUNDAY
MOSTLY CLOUDY WITH CHANCE OF SNOW. CHANCE OF SNOW 50 PERCENT.
LOWS 20-30. HIGHS 30-40. SOUTHWEST WINDS 15-25 MPH.
MONDAY
MOSTLY CLOUDY WITH SNOW AND RAIN LIKELY. CHANCE OF
PRECIPITATION 70 PERCENT. LOWS 25-35. HIGHS 35-45.
TUESDAY
MOSTLY CLOUDY WITH CHANCE OF SNOW AND RAIN. CHANCE OF
PRECIPITATION 50 PERCENT. LOWS 25-35. HIGHS 35-45.
MTZ106-108-171100-
WEST LOLO-EAST LOLO-
241 PM MST TUE DEC 16 2025
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. AND PATCHY BLOWING SNOW. RAIN
AND SNOW. SNOW LEVEL 6000 FEET.
* MIN TEMPERATURE.....30-35 VALLEYS AND 20-30 RIDGES.
* MAX HUMIDITY........92-100 PERCENT VALLEYS AND 85-95 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTHEAST 5-15 MPH INCREASING TO 10-20 MPH
AFTER MIDNIGHT.
* RIDGE TOP............SOUTHWEST 35-45 MPH.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 20 MPH UNTIL 0400, THEN 25 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...100 PERCENT IN THE WEST LOLO...AND 70 PERCENT
IN THE EAST LOLO.
WEDNESDAY
* SKY/WEATHER.........BLOWING SNOW IN THE MORNING. PATCHY BLOWING
SNOW IN THE AFTERNOON. RAIN IN THE MORNING. CHANCE OF SNOW. SNOW
LEVEL 3500 FEET.
* MAX TEMPERATURE.....35-45.
* MIN HUMIDITY........59-69 PERCENT VALLEYS AND 65-75 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 35-45 MPH.
* RIDGE TOP............WEST 35-45 MPH.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 0800. 5 KFT AGL AFTER 1000.
* TRANSPORT WINDS.....SOUTHWEST 35 MPH UNTIL 0800, THEN WEST 50 MPH
UNTIL 1600, THEN 40 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...90 PERCENT.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. PATCHY BLOWING SNOW IN THE
EVENING. CHANCE OF SNOW.
* MIN TEMPERATURE.....20-30.
* MAX HUMIDITY........72-82 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 10-20 MPH.
* RIDGE TOP............WEST 35-45 MPH DECREASING TO 20-30 MPH AFTER
MIDNIGHT.
* MIXING HEIGHT.......3 KFT AGL UNTIL 2200, THEN 1-2 KFT AGL.
* TRANSPORT WINDS.....WEST 35 MPH UNTIL 2100. SOUTHWEST 15 MPH
AFTER 0200.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. SNOW.
* MAX TEMPERATURE.....35-40.
* MIN HUMIDITY........64-74 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 5-15 MPH.
* RIDGE TOP............SOUTH 10-20 MPH.
* MIXING HEIGHT.......1-2 KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 15 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...60 PERCENT IN THE WEST LOLO...AND 20 PERCENT
IN THE EAST LOLO.
FRIDAY
SNOW AND RAIN. PATCHY BLOWING SNOW. CHANCE OF PRECIPITATION
NEAR 100 PERCENT. LOWS 30-40. HIGHS 35-45. MIN HUMIDITIES
60-70 PERCENT. SOUTHWEST WINDS 20-30 MPH.
SATURDAY
MOSTLY CLOUDY WITH CHANCE OF SNOW. CHANCE OF SNOW
50 PERCENT. LOWS 25-35. HIGHS 30-40. MIN HUMIDITIES 55-65 PERCENT.
SOUTHWEST WINDS 10-20 MPH.
SUNDAY
MOSTLY CLOUDY WITH CHANCE OF SNOW. CHANCE OF SNOW 30 PERCENT.
LOWS 20-30. HIGHS 35-45. SOUTHWEST WINDS 10-15 MPH.
MONDAY
MOSTLY CLOUDY WITH SNOW AND RAIN LIKELY. CHANCE OF
PRECIPITATION 70 PERCENT. LOWS 30-40. HIGHS 35-45.
TUESDAY
MOSTLY CLOUDY WITH CHANCE OF SNOW AND RAIN. CHANCE OF
PRECIPITATION 40 PERCENT. LOWS 25-35. HIGHS 35-45.
MTZ107-171100-
FLATHEAD RESERVATION-
241 PM MST TUE DEC 16 2025
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. PATCHY BLOWING SNOW IN THE
EVENING. BLOWING SNOW AFTER MIDNIGHT. RAIN. SNOW LEVEL 6000 FEET.
* MIN TEMPERATURE.....35-40 VALLEYS AND 20-25 RIDGES.
* MAX HUMIDITY........81-91 PERCENT VALLEYS AND 93 PERCENT RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 25-35 MPH.
* RIDGE TOP............SOUTH 35-45 MPH.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 20 MPH UNTIL 0400, THEN 25 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...90 PERCENT.
WEDNESDAY
* SKY/WEATHER.........MOSTLY CLOUDY. BLOWING SNOW IN THE MORNING.
PATCHY BLOWING SNOW IN THE AFTERNOON. RAIN IN THE MORNING. CHANCE
OF SNOW. SNOW LEVEL 3500 FEET.
* MAX TEMPERATURE.....45-50 VALLEYS AND 30-35 RIDGES.
* MIN HUMIDITY........52-62 PERCENT VALLEYS AND 71-81 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 35-45 MPH.
* RIDGE TOP............WEST 40-50 MPH.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL UNTIL 0800. 5 KFT
AGL AFTER 0900.
* TRANSPORT WINDS.....SOUTHWEST 30 MPH UNTIL 0800, THEN WEST 45 MPH
UNTIL 1000, THEN 50 MPH UNTIL 1600, THEN 35 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...80 PERCENT.
WEDNESDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY. PATCHY BLOWING SNOW IN THE
EVENING. SLIGHT CHANCE OF SNOW.
* MIN TEMPERATURE.....30-35 VALLEYS AND 20-25 RIDGES.
* MAX HUMIDITY........70-80 PERCENT VALLEYS AND 84-94 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 15-25 MPH BECOMING SOUTHWEST 10-15 MPH
AFTER MIDNIGHT.
* RIDGE TOP............WEST 35-45 MPH DECREASING TO 20-30 MPH AFTER
MIDNIGHT.
* MIXING HEIGHT.......3 KFT AGL UNTIL 2100, THEN 1-2 KFT AGL.
* TRANSPORT WINDS.....WEST 30 MPH UNTIL 2000. SOUTHWEST 10 MPH
AFTER 0400.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. SNOW. RAIN IN THE AFTERNOON.
* MAX TEMPERATURE.....40-45 VALLEYS AND 30-35 RIDGES.
* MIN HUMIDITY........66-76 PERCENT VALLEYS AND 74-84 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 5-15 MPH.
* RIDGE TOP............SOUTH 15-25 MPH.
* MIXING HEIGHT.......1-2 KFT AGL.
* TRANSPORT WINDS.....SOUTH 15 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
FRIDAY
CLOUDY WITH SNOW AND RAIN. PATCHY BLOWING SNOW. CHANCE OF
PRECIPITATION 90 PERCENT. LOWS 30-40. HIGHS 40-50. MIN HUMIDITIES
60-70 PERCENT. SOUTHWEST WINDS 15-25 MPH.
SATURDAY
MOSTLY CLOUDY WITH CHANCE OF SNOW. CHANCE OF SNOW
40 PERCENT. LOWS 25-35. HIGHS 35-45. MIN HUMIDITIES 55-65 PERCENT.
SOUTHWEST WINDS 10-20 MPH.
SUNDAY
MOSTLY CLOUDY WITH CHANCE OF SNOW. CHANCE OF SNOW 30 PERCENT.
LOWS 25-35. HIGHS 35-45. SOUTH WINDS 5-15 MPH.
MONDAY
MOSTLY CLOUDY WITH SNOW LIKELY AND CHANCE OF RAIN. CHANCE OF
PRECIPITATION 60 PERCENT. LOWS 30-40. HIGHS 40-50.
TUESDAY
MOSTLY CLOUDY WITH CHANCE OF SNOW AND SLIGHT CHANCE OF RAIN.
CHANCE OF PRECIPITATION 30 PERCENT. LOWS 30-40. HIGHS 35-45.
MTZ109-171100-
BITTERROOT-
241 PM MST TUE DEC 16 2025
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING CLOUDY. AND
PATCHY BLOWING SNOW. SNOW LIKELY AFTER MIDNIGHT. SNOW LEVEL 6500
FEET.
* MIN TEMPERATURE.....30-35 VALLEYS AND 20-25 RIDGES.
* MAX HUMIDITY........78-88 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 30-40 MPH.
* RIDGE TOP............SOUTH 35-45 MPH.
* MIXING HEIGHT.......1-2 KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 20 MPH UNTIL 0100, THEN 25 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT IN THE DARBY, SULA, AND WEST
FORK DISTRICTS...AND 0 PERCENT IN AREAS NORTH OF HAMILTON.
* CWR (> 0.10 INCH)...70 PERCENT.
WEDNESDAY
* SKY/WEATHER.........BLOWING SNOW IN THE MORNING. PATCHY BLOWING
SNOW IN THE AFTERNOON. RAIN IN THE MORNING. CHANCE OF SNOW. SNOW
LEVEL 4000 FEET.
* MAX TEMPERATURE.....45-50 VALLEYS AND 35-40 RIDGES.
* MIN HUMIDITY........50-60 PERCENT VALLEYS AND 61-71 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 35-45 MPH.
* RIDGE TOP............WEST 40-50 MPH DECREASING TO 30-40 MPH IN
THE AFTERNOON.
* MIXING HEIGHT.......1-2 KFT AGL UNTIL 0800, THEN 4 KFT AGL UNTIL
1000, THEN 6 KFT AGL UNTIL 1600, THEN 5 KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 30 MPH UNTIL 0800, THEN WEST 45 MPH
UNTIL 1600, THEN 35 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...100 PERCENT.
WEDNESDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SNOW.
* MIN TEMPERATURE.....20-30.
* MAX HUMIDITY........67-77 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 15-25 MPH BECOMING SOUTHWEST 5-10 MPH
AFTER MIDNIGHT.
* RIDGE TOP............WEST 35-45 MPH BECOMING SOUTHWEST 20-30 MPH
AFTER MIDNIGHT.
* MIXING HEIGHT.......3 KFT AGL UNTIL 2400, THEN 1-2 KFT AGL.
* TRANSPORT WINDS.....WEST 30 MPH UNTIL 2200. SOUTHWEST 10 MPH
AFTER 0400.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
THURSDAY
* SKY/WEATHER.........SNOW.
* MAX TEMPERATURE.....45-50 VALLEYS AND 30-35 RIDGES.
* MIN HUMIDITY........65-75 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTH 10-20 MPH.
* RIDGE TOP............SOUTH 10-20 MPH.
* MIXING HEIGHT.......1-2 KFT AGL.
* TRANSPORT WINDS.....SOUTH 15 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...90 PERCENT IN THE DARBY, SULA, AND WEST FORK
DISTRICTS...AND 40 PERCENT IN AREAS NORTH OF HAMILTON.
FRIDAY
SNOW AND RAIN. PATCHY BLOWING SNOW. CHANCE OF PRECIPITATION
NEAR 100 PERCENT. LOWS 30-40. HIGHS 35-45. MIN HUMIDITIES
50-60 PERCENT. SOUTHWEST WINDS 20-30 MPH.
SATURDAY
MOSTLY CLOUDY WITH CHANCE OF SNOW. CHANCE OF SNOW
50 PERCENT. LOWS 20-30. HIGHS 30-40. MIN HUMIDITIES 55-65 PERCENT.
SOUTHWEST WINDS 15-25 MPH.
SUNDAY
MOSTLY CLOUDY WITH CHANCE OF SNOW. CHANCE OF SNOW 30 PERCENT.
LOWS 20-30. HIGHS 35-45. SOUTH WINDS 10-20 MPH.
MONDAY
MOSTLY CLOUDY WITH SNOW AND RAIN LIKELY. CHANCE OF
PRECIPITATION 70 PERCENT. LOWS 30-40. HIGHS 35-45.
TUESDAY
MOSTLY CLOUDY WITH CHANCE OF SNOW AND RAIN. CHANCE OF
PRECIPITATION 30 PERCENT. LOWS 25-35. HIGHS 40-50.
MTZ110-111-171100-
DEERLODGE/WEST BEAVERHEAD-EAST BEAVERHEAD-
241 PM MST TUE DEC 16 2025
TONIGHT
* SKY/WEATHER.........PARTLY CLOUDY. AND PATCHY BLOWING SNOW.
CHANCE OF SNOW AFTER MIDNIGHT. SNOW LEVEL 6500 FEET.
* MIN TEMPERATURE.....28-38 VALLEYS AND 20-30 RIDGES.
* MAX HUMIDITY........71-81 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTHWEST 25-35 MPH.
* RIDGE TOP............SOUTHWEST 25-35 MPH INCREASING TO 35-45 MPH
AFTER MIDNIGHT.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 25 MPH UNTIL 0300, THEN 30 MPH.
* CHANCE LIGHTNING....0 PERCENT.
* CWR (> 0.10 INCH)...40 PERCENT IN THE DEERLODGE/WEST
BEAVERHEAD...AND 10 PERCENT IN THE EAST BEAVERHEAD.
WEDNESDAY
* SKY/WEATHER.........PARTLY CLOUDY. BLOWING SNOW IN THE MORNING.
PATCHY BLOWING SNOW IN THE AFTERNOON. SNOW AND CHANCE OF RAIN.
* MAX TEMPERATURE.....45-50 VALLEYS AND 30-40 RIDGES.
* MIN HUMIDITY........41-51 PERCENT VALLEYS AND 49-59 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 45-55 MPH.
* RIDGE TOP............WEST 45-55 MPH.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL UNTIL 0900. 6 KFT
AGL AFTER 1100.
* TRANSPORT WINDS.....SOUTHWEST 35 MPH UNTIL 1000, THEN WEST 50 MPH
UNTIL 1600, THEN 40 MPH.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...90 PERCENT IN THE DEERLODGE/WEST
BEAVERHEAD...AND 70 PERCENT IN THE EAST BEAVERHEAD.
WEDNESDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY. PATCHY BLOWING SNOW IN THE
EVENING.
* MIN TEMPERATURE.....15-25.
* MAX HUMIDITY........58-68 PERCENT.
* 20-FOOT WINDS.......
* LOWER ELEVATION......WEST 30-40 MPH DECREASING TO 15-25 MPH AFTER
MIDNIGHT.
* RIDGE TOP............WEST 35-45 MPH DECREASING TO 25-35 MPH AFTER
MIDNIGHT.
* MIXING HEIGHT.......3 KFT AGL UNTIL 2100, THEN BELOW 500 FT TO 1
KFT AGL.
* TRANSPORT WINDS.....WEST 40 MPH UNTIL 2200. 20 MPH AFTER 0200.
* CHANCE LIGHTNING....NEAR 0 PERCENT.
* CWR (> 0.10 INCH)...0 PERCENT.
THURSDAY
* SKY/WEATHER.........MOSTLY CLOUDY. SNOW.
* MAX TEMPERATURE.....40-45 VALLEYS AND 25-35 RIDGES.
* MIN HUMIDITY........48-58 PERCENT VALLEYS AND 59-69 PERCENT
RIDGES.
* 20-FOOT WINDS.......
* LOWER ELEVATION......SOUTHWEST 10-20 MPH INCREASING TO SOUTH
20-30 MPH IN THE AFTERNOON.
* RIDGE TOP............SOUTH 15-25 MPH.
* MIXING HEIGHT.......BELOW 500 FT TO 1 KFT AGL.
* TRANSPORT WINDS.....SOUTHWEST 20 MPH UNTIL 1200, THEN 25 MPH.
* CHANCE LIGHTNING....0 PERCENT.
* CWR (> 0.10 INCH)...10 PERCENT.
FRIDAY
MOSTLY CLOUDY WITH SNOW WITH RAIN LIKELY. CHANCE OF
PRECIPITATION 90 PERCENT. LOWS 30-40. HIGHS 40-50. MIN HUMIDITIES
45-55 PERCENT. SOUTHWEST WINDS 20-30 MPH.
SATURDAY
COLDER. PARTLY CLOUDY WITH CHANCE OF SNOW. CHANCE OF SNOW
30 PERCENT. LOWS 20-30. HIGHS 30-40. MIN HUMIDITIES 40-50 PERCENT. WEST
WINDS 15-25 MPH.
SUNDAY
PARTLY CLOUDY WITH SLIGHT CHANCE OF SNOW. CHANCE OF SNOW
20 PERCENT. LOWS 15-25. HIGHS 35-45. SOUTHWEST WINDS 10-20 MPH.
MONDAY
MOSTLY CLOUDY WITH CHANCE OF SNOW AND RAIN. CHANCE OF
PRECIPITATION 30 PERCENT. LOWS 25-35. HIGHS 40-50.
TUESDAY
MOSTLY CLOUDY WITH SLIGHT CHANCE OF SNOW. CHANCE OF SNOW
20 PERCENT. LOWS 30-40. HIGHS 40-50.
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