504
FNUS55 KMSO 110817
FWFMSO

Fire Weather Planning Forecast for Wrn Montana and N Cntrl Idaho
National Weather Service Missoula MT
217 AM MDT Sun May 11 2025


.DISCUSSION...

Idaho (Zones 102, 103): Showers and thunderstorms today kick off a much
cooler and wetter week. By the end of the week much of the region will
have picked up half an inch to one and a half inches of new rain.

Northwest MT (Zones 104, 105): A cold front moving through today will
cause showers and thunderstorms. This will kick off a much cooler and
wetter week.

West Central MT (Zones 106, 107, 108): A cold front moving through today
will cause showers and thunderstorms. This will kick off a much cooler
and wetter week, falling snow levels tonight and Monday will bring some
snow showers this week, especially above 6,000 feet in the southern
Bitterroot.

Southwest MT (Zones 109, 110, 111): A cold front moving through today
will cause showers and thunderstorms. This will kick off a much cooler
and wetter week, falling snow levels tonight and Monday will bring some
snow showers this week.

View Weather Briefing videos on our YouTube channel
at https://www.youtube.com/NWSMissoula

IDZ102-103-120830-
Palouse/Hells Canyon-Clearwater/Nez Perce-
117 AM PDT Sun May 11 2025

.TODAY...
* Sky/Weather.........Partly cloudy. Chance of rain showers. Slight
  chance of thunderstorms in the afternoon.
* Max Temperature.....75-85 valleys and 60-70 ridges.
* Min Humidity........27-37 percent.
* 20-Foot Winds.......
*     Lower Elevation......Calm to becoming southwest 10-15 mph in the
      afternoon.
*     Ridge Top............Southwest 10-20 mph.
* Mixing Height.......1-2 kft agl until 1000. 10 kft agl after
  1500.
* Transport Winds.....Variable less than 10 mph until 0900, then
  west 10 mph until 1200, then southwest 20 mph.
* Chance Lightning....25 percent.
* CWR (> 0.10 Inch)...20 percent in the Palouse/Hells Canyon...and
  0 percent in the Clearwater/Nez Perce.

.TONIGHT...
* Sky/Weather.........Mostly cloudy. Rain showers in the evening.
  Chance of thunderstorms. Rain after midnight.
* Min Temperature.....45-50 valleys and 35-40 ridges.
* Max Humidity........80-90 percent valleys and 87-97 percent
  ridges.
* 20-Foot Winds.......
*     Lower Elevation......West 10-15 mph.
*     Ridge Top............West 10-15 mph.
* Mixing Height.......9 kft agl until 1900. 1-2 kft agl after 2000.
* Transport Winds.....West 20 mph until 2100, then 10 mph.
* Chance Lightning....30 percent in the Palouse/Hells Canyon...and
  40 percent in the Clearwater/Nez Perce.
* CWR (> 0.10 Inch)...80 percent in the Palouse/Hells Canyon...and
  50 percent in the Clearwater/Nez Perce.

.MONDAY...
* Sky/Weather.........Mostly cloudy. Rain in the morning, then rain
  showers and slight chance of thunderstorms in the afternoon. Snow
  level 6000 feet.
* Max Temperature.....60-65 valleys and 45-55 ridges.
* Min Humidity........43-53 percent.
* 20-Foot Winds.......
*     Lower Elevation......West 5-15 mph.
*     Ridge Top............West 10-20 mph.
* Mixing Height.......3 kft agl until 1000, then 5 kft agl until
  1200, then 7 kft agl until 1700, then 5 kft agl.
* Transport Winds.....West 15 mph.
* Chance Lightning....20 percent.
* CWR (> 0.10 Inch)...70 percent.

.TUESDAY...Mostly cloudy with chance of rain showers, snow and slight
chance of thunderstorms. Chance of precipitation 50 percent. Lows
40-50. Highs 50-60. Min humidities 45-55 percent. West winds 10-15 mph.
.WEDNESDAY...Mostly cloudy with chance of rain. Chance of rain
30 percent. Lows 40-50. Highs 50-60. Min humidities 40-50 percent. West
winds 10-15 mph.
.THURSDAY...Partly cloudy with slight chance of rain. Chance of rain
20 percent. Lows 40-50. Highs 55-65. West winds 10-15 mph.
.FRIDAY...Mostly cloudy with chance of rain. Chance of rain 40 percent.
Lows 40-50. Highs 55-65.
.SATURDAY...Mostly cloudy with chance of rain showers and slight chance
of thunderstorms. Chance of precipitation 50 percent. Lows 40-50. Highs
55-65.

$$

MTZ104-105-120830-
Kootenai-Flathead/Glacier Park-
217 AM MDT Sun May 11 2025

.TODAY...
* Sky/Weather.........Mostly cloudy. Chance of rain in the morning,
  then chance of rain showers and slight chance of thunderstorms in
  the afternoon.
* Max Temperature.....70-75 valleys and 53-63 ridges.
* Min Humidity........27-37 percent valleys and 41-51 percent
  ridges.
* 20-Foot Winds.......
*     Lower Elevation......Calm to variable less than 7 mph.
*     Ridge Top............West 10-15 mph.
* Mixing Height.......1-2 kft agl until 0900. 8 kft agl after 1400.
* Transport Winds.....Variable less than 10 mph until 0800. 15 mph
  after 1200.
* Chance Lightning....25 percent in the Kootenai...and 30 percent
  in the Flathead/Glacier Park.
* CWR (> 0.10 Inch)...30 percent.

.TONIGHT...
* Sky/Weather.........Mostly cloudy. Rain showers and chance of
  thunderstorms.
* Min Temperature.....35-45.
* Max Humidity........91-100 percent valleys and 82-92 percent
  ridges.
* 20-Foot Winds.......
*     Lower Elevation......Variable less than 5 mph.
*     Ridge Top............West 5-15 mph.
* Mixing Height.......7 kft agl until 1900. 1-2 kft agl after 2000.
* Transport Winds.....West 15 mph until 2100, then northwest 10 mph
  until 0200, then southwest 15 mph.
* Chance Lightning....30 percent in the Kootenai...and 40 percent
  in the Flathead/Glacier Park.
* CWR (> 0.10 Inch)...90 percent.

.MONDAY...
* Sky/Weather.........Mostly cloudy. Rain in the morning, then rain
  showers likely and slight chance of thunderstorms in the
  afternoon. Snow level 6500 feet.
* Max Temperature.....60-65 valleys and 40-50 ridges.
* Min Humidity........35-45 percent valleys and 55-65 percent
  ridges.
* 20-Foot Winds.......
*     Lower Elevation......Southwest 10-20 mph.
*     Ridge Top............Southwest 10-20 mph.
* Mixing Height.......3 kft agl until 0900. 7 kft agl after 1300.
* Transport Winds.....Southwest 20 mph until 1200, then 25 mph.
* Chance Lightning....20 percent in the Kootenai...and 25 percent
  in the Flathead/Glacier Park.
* CWR (> 0.10 Inch)...20 percent in the Kootenai...and 40 percent
  in the Flathead/Glacier Park.

.TUESDAY...Mostly cloudy with chance of rain and snow. Chance of
precipitation 30 percent. Lows 35-45. Highs 50-60. Min humidities
45-55 percent. West winds 10-20 mph.
.WEDNESDAY...Mostly cloudy with chance of rain. Chance of rain
30 percent. Lows 35-45. Highs 55-65. Min humidities 45-55 percent.
Southwest winds 10-15 mph.
.THURSDAY...Mostly cloudy with chance of rain. Chance of rain
40 percent. Lows 40-50. Highs 50-60. Southwest winds 10-15 mph.
.FRIDAY...Mostly cloudy with chance of rain. Chance of rain 30 percent.
Lows 40-50. Highs 50-60.
.SATURDAY...Mostly cloudy with chance of rain. Chance of rain
40 percent. Lows 40-50. Highs 55-65.

$$

MTZ106-108-120830-
West Lolo-East Lolo-
217 AM MDT Sun May 11 2025

.TODAY...
* Sky/Weather.........Mostly cloudy. Slight chance of rain in the
  morning. Chance of thunderstorms in the afternoon.
* Max Temperature.....63-73.
* Min Humidity........23-33 percent valleys and 31-41 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. 11 kft agl after
  1500.
* Transport Winds.....Variable less than 10 mph until 0900, then
  southwest 15 mph until 1300, then 25 mph.
* Chance Lightning....30 percent.
* CWR (> 0.10 Inch)...10 percent.

.TONIGHT...
* Sky/Weather.........Mostly cloudy. Rain showers and chance of
  thunderstorms.
* Min Temperature.....40-45.
* Max Humidity........87-97 percent valleys and 75-85 percent
  ridges.
* 20-Foot Winds.......
*     Lower Elevation......West 10-15 mph.
*     Ridge Top............West 10-15 mph.
* Mixing Height.......9 kft agl until 1900. Below 500 ft to 1 kft
  agl after 2000.
* Transport Winds.....Southwest 20 mph until 2000, then west 15
  mph.
* Chance Lightning....40 percent in the West Lolo...and 30 percent
  in the East Lolo.
* CWR (> 0.10 Inch)...80 percent in the West Lolo...and 10 percent
  in the East Lolo.

.MONDAY...
* Sky/Weather.........Mostly cloudy. Rain likely in the morning,
  then rain showers likely and slight chance of thunderstorms in
  the afternoon. Snow level 6500 feet.
* Max Temperature.....50-60.
* Min Humidity........36-46 percent valleys and 45-55 percent
  ridges.
* 20-Foot Winds.......
*     Lower Elevation......West 5-15 mph.
*     Ridge Top............West 10-20 mph.
* Mixing Height.......2 kft agl until 0800, then 3 kft agl until
  0900, then 5 kft agl until 1000, then 6 kft agl until 1100, then
  8 kft agl until 1200, then 9 kft agl until 1600, then 8 kft agl.
* Transport Winds.....West 15 mph until 0900, then southwest 25
  mph.
* Chance Lightning....20 percent.
* CWR (> 0.10 Inch)...40 percent in the West Lolo...and 10 percent
  in the East Lolo.

.TUESDAY...Mostly cloudy with rain showers with possible snow and
thunderstorms. Chance of precipitation 80 percent. Lows 40-50. Highs
50-60. Min humidities 40-50 percent. West winds 10-15 mph.
.WEDNESDAY...Mostly cloudy with chance of rain. Chance of rain
30 percent. Lows 40-50. Highs 50-60. Min humidities 40-50 percent. West
winds 10-15 mph.
.THURSDAY...Mostly cloudy with chance of rain. Chance of rain
30 percent. Lows 40-50. Highs 55-65. West winds 10-20 mph.
.FRIDAY...Mostly cloudy with chance of rain. Chance of rain 30 percent.
Lows 40-50. Highs 55-65.
.SATURDAY...Mostly cloudy with chance of rain. Chance of rain
40 percent. Lows 40-50. Highs 55-65.

$$

MTZ107-120830-
Flathead Reservation-
217 AM MDT Sun May 11 2025

.TODAY...
* Sky/Weather.........Mostly cloudy. Slight chance of rain in the
  morning, then chance of rain showers and thunderstorms in the
  afternoon.
* Max Temperature.....75-80 valleys and 55-60 ridges.
* Min Humidity........24-34 percent valleys and 34-44 percent
  ridges.
* 20-Foot Winds.......
*     Lower Elevation......Calm to becoming upslope/upvalley 4-8 mph in
      the afternoon.
*     Ridge Top............Southwest 5-15 mph.
* Mixing Height.......1-2 kft agl until 1000, then 3 kft agl until
  1100, then 6 kft agl until 1300, then 7 kft agl until 1400, then
  10 kft agl until 1700, then 8 kft agl.
* Transport Winds.....Variable less than 10 mph until 1200, then
  southwest 15 mph.
* Chance Lightning....30 percent.
* CWR (> 0.10 Inch)...20 percent.

.TONIGHT...
* Sky/Weather.........Mostly cloudy. Rain showers and chance of
  thunderstorms.
* Min Temperature.....45-50 valleys and 35-40 ridges.
* Max Humidity........78-88 percent valleys and 89-99 percent
  ridges.
* 20-Foot Winds.......
*     Lower Elevation......Variable less than 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.....Southwest 15 mph until 2000, then west 10 mph
  until 2100, then north 10 mph until 2400, then west 15 mph until
  0400, then southwest 10 mph.
* Chance Lightning....30 percent.
* CWR (> 0.10 Inch)...70 percent.

.MONDAY...
* Sky/Weather.........Mostly cloudy. Rain in the morning, then rain
  showers likely and slight chance of thunderstorms in the
  afternoon. Snow level 6500 feet.
* Max Temperature.....65-70 valleys and 40-45 ridges.
* Min Humidity........34-44 percent valleys and 59-69 percent
  ridges.
* 20-Foot Winds.......
*     Lower Elevation......Southwest 5-15 mph.
*     Ridge Top............Southwest 10-20 mph.
* Mixing Height.......1-2 kft agl until 0800. 7 kft agl after 1300.
* Transport Winds.....Southwest 15 mph until 1100, then west 20
  mph.
* Chance Lightning....25 percent.
* CWR (> 0.10 Inch)...30 percent in areas west of Highway 93...and
  50 percent in the Mission Mtns and areas east of Highway 93.

.TUESDAY...Mostly cloudy with rain showers likely and slight chance of
thunderstorms. Chance of precipitation 70 percent. Lows 40-50. Highs
55-65. Min humidities 40-50 percent. West winds 10-15 mph.
.WEDNESDAY...Mostly cloudy with slight chance of rain. Chance of rain
20 percent. Lows 40-50. Highs 55-65. Min humidities 40-50 percent. West
winds 10-20 mph.
.THURSDAY...Mostly cloudy with chance of rain. Chance of rain
30 percent. Lows 45-55. Highs 60-70. Southwest winds 10-20 mph.
.FRIDAY...Mostly cloudy with chance of rain. Chance of rain 30 percent.
Lows 40-50. Highs 60-70.
.SATURDAY...Mostly cloudy with chance of rain. Chance of rain
30 percent. Lows 40-50. Highs 60-70.

$$

MTZ109-120830-
Bitterroot-
217 AM MDT Sun May 11 2025

.TODAY...
* Sky/Weather.........Partly cloudy. Slight chance of rain in the
  morning. Slight chance of thunderstorms in the afternoon.
* Max Temperature.....75-80 valleys and 65-70 ridges.
* Min Humidity........15-25 percent valleys and 24-34 percent
  ridges.
* 20-Foot Winds.......
*     Lower Elevation......Southwest 10-20 mph.
*     Ridge Top............Southwest 15-25 mph.
* Mixing Height.......3 kft agl until 1000. Greater than 12 kft agl
  after 1500.
* Transport Winds.....South 15 mph until 1000. Southwest 35 mph
  after 1200.
* 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.

.TONIGHT...
* Sky/Weather.........Partly cloudy. Chance of rain showers and
  slight chance of thunderstorms.
* Min Temperature.....40-50 valleys and 35-40 ridges.
* Max Humidity........61-71 percent.
* 20-Foot Winds.......
*     Lower Elevation......South 5-15 mph becoming variable less than 5
      mph after midnight.
*     Ridge Top............Southwest 15-25 mph decreasing to 5-15 mph
      after midnight.
* Mixing Height.......11 kft agl until 1900. 1-2 kft agl after
  2000.
* Transport Winds.....Southwest 30 mph until 2000, then 15 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.

.MONDAY...
* Sky/Weather.........Mostly cloudy. Chance of snow in the morning.
  Chance of rain. Snow level 7000 feet.
* Max Temperature.....65-70 valleys and 50-55 ridges.
* Min Humidity........27-37 percent valleys and 34-44 percent
  ridges.
* 20-Foot Winds.......
*     Lower Elevation......Southwest 10-20 mph.
*     Ridge Top............Southwest 15-25 mph.
* Mixing Height.......1-2 kft agl until 0800, then 4 kft agl until
  0900, then 6 kft agl until 1000, then 8 kft agl until 1100, then
  10 kft agl until 1700, then 9 kft agl.
* Transport Winds.....Southwest 15 mph until 0900, then 30 mph
  until 1300, then 35 mph until 1700, then 25 mph.
* Chance Lightning....Near 0 percent in the Darby, Sula, and West
  Fork Districts...and 20 percent in areas north of Hamilton.
* CWR (> 0.10 Inch)...0 percent in the Darby, Sula, and West Fork
  Districts...and 20 percent in areas north of Hamilton.

.TUESDAY...Cooler. Mostly cloudy with snow likely with possible rain
showers and thunderstorms. Chance of precipitation 90 percent. Lows
35-45. Highs 45-55. Min humidities 40-50 percent. Northwest winds
10-15 mph.
.WEDNESDAY...Mostly cloudy with rain showers likely with possible snow
and thunderstorms. Chance of precipitation 70 percent. Lows 35-45.
Highs 50-60. Min humidities 40-50 percent. Northwest winds 10-20 mph.
.THURSDAY...Mostly cloudy with chance of rain and snow. Chance of
precipitation 30 percent. Lows 35-45. Highs 50-60. West winds
10-20 mph.
.FRIDAY...Mostly cloudy with slight chance of rain and snow. Chance of
precipitation 20 percent. Lows 35-45. Highs 50-60.
.SATURDAY...Mostly cloudy with rain showers likely with possible snow
and thunderstorms. Chance of precipitation 70 percent. Lows 35-45.
Highs 50-60.

$$

MTZ110-111-120830-
Deerlodge/West Beaverhead-East Beaverhead-
217 AM MDT Sun May 11 2025

.TODAY...
* Sky/Weather.........Partly cloudy. Chance of rain showers and
  thunderstorms.
* Max Temperature.....70-75 valleys and 60-65 ridges.
* Min Humidity........12-22 percent valleys and 19-29 percent
  ridges.
* 20-Foot Winds.......
*     Lower Elevation......Southwest 25-35 mph.
*     Ridge Top............Southwest 25-35 mph.
* Mixing Height.......1-2 kft agl until 0900. Greater than 12 kft
  agl after 1300.
* Transport Winds.....South 20 mph until 1000. Southwest 35 mph
  after 1200.
* Chance Lightning....30 percent in the Deerlodge/West
  Beaverhead...and 40 percent in the East Beaverhead.
* CWR (> 0.10 Inch)...10 percent.

.TONIGHT...
* Sky/Weather.........Partly cloudy. Chance of rain and slight
  chance of thunderstorms.
* Min Temperature.....40-45.
* Max Humidity........51-61 percent.
* 20-Foot Winds.......
*     Lower Elevation......South 20-30 mph decreasing to 10-20 mph
      after midnight.
*     Ridge Top............South 20-30 mph decreasing to 10-20 mph
      after midnight.
* Mixing Height.......10 kft agl until 1900. Below 500 ft to 1 kft
  agl after 2100.
* Transport Winds.....Southwest 30 mph until 2000, then south 20
  mph.
* Chance Lightning....20 percent in the Deerlodge/West
  Beaverhead...and 25 percent in the East Beaverhead.
* CWR (> 0.10 Inch)...10 percent.

.MONDAY...
* Sky/Weather.........Partly cloudy. Chance of rain.
* Max Temperature.....60-70 valleys and 55-60 ridges.
* Min Humidity........17-27 percent.
* 20-Foot Winds.......
*     Lower Elevation......Southwest 25-35 mph.
*     Ridge Top............Southwest 25-35 mph.
* Mixing Height.......1-2 kft agl until 0800, then 4 kft agl until
  0900, then 6 kft agl until 1000, then 7 kft agl until 1100, then
  9 kft agl until 1200, then 10 kft agl until 1700, then 9 kft agl.
* Transport Winds.....Southwest 20 mph until 0900. 35 mph after
  1100.
* Chance Lightning....Near 0 percent.
* CWR (> 0.10 Inch)...0 percent.

.TUESDAY...Cooler. Cloudy with rain showers, snow showers likely and
slight chance of thunderstorms. Chance of precipitation 70 percent.
Lows 35-45. Highs 45-55. Min humidities 45-55 percent. Northwest winds
15-25 mph.
.WEDNESDAY...Mostly cloudy with rain showers, snow showers likely and
slight chance of thunderstorms. Chance of precipitation 70 percent.
Lows 35-45. Highs 45-55. Min humidities 35-45 percent. Northwest winds
10-20 mph.
.THURSDAY...Mostly cloudy with chance of rain showers, snow showers and
slight chance of thunderstorms. Chance of precipitation 30 percent.
Lows 35-45. Highs 50-60. West winds 10-20 mph.
.FRIDAY...Mostly cloudy with chance of rain showers and slight chance
of thunderstorms. Chance of precipitation 30 percent. Lows 35-45. Highs
55-65.
.SATURDAY...Mostly cloudy with chance of rain showers, snow showers and
slight chance of thunderstorms. Chance of precipitation 30 percent.
Lows 35-45. Highs 55-65.

$$