National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hawaii and Guam Concerns; Severe Weather for the Plains; Heavy Snow for Sierra-Nevada

Heavy rainfall capable of causing flash flooding will continue to impact Hawaii through Monday. Severe thunderstorms and heavy rain are possible in parts of Texas and the southern Plains and the Upper Great Lakes. Heavy mountain snow continues in California's Sierra Nevada and rain with gusty winds to lower elevations. Super Typhoon Sinlaku will impact the Marianas through midweek. Read More >

Current conditions at

LIBBY (LBBM8)

Lat: 48.40361°NLon: 115.53917°WElev: 2070.0ft.

NA

47°F

8°C

Humidity 83%
Wind Speed NW 0 MPH
Barometer NA
Dewpoint 42°F (6°C)
Visibility NA
Last update 12 Apr 11:25 PM MDT
Extended Forecast for

18 Miles SW Fortine MT

  • Tonight

    Tonight: A 20 percent chance of rain before 1am. Snow level 7000 feet lowering to 6200 feet after midnight . Mostly cloudy, with a low around 39. Northeast wind 3 to 5 mph.

    Low: 39 °F

    Slight Chance
    Rain

  • Monday

    Monday: A chance of rain before 3pm, then a chance of showers and thunderstorms between 3pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Snow level 6100 feet rising to 6900 feet in the afternoon. Partly sunny, with a high near 49. Light and variable wind becoming west southwest 6 to 11 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 49 °F

    Slight Chance
    Rain then
    Showers
    Likely

  • Monday Night

    Monday Night: A chance of rain, mixing with snow after 9pm, then gradually ending. Snow level 6700 feet lowering to 5600 feet after midnight . Mostly cloudy, with a low around 36. Southwest wind around 11 mph, with gusts as high as 23 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 36 °F

    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 40. Southwest wind 10 to 15 mph, with gusts as high as 28 mph. Little or no snow accumulation expected.

    High: 40 °F

    Chance Snow

  • Tuesday Night

    Tuesday Night: Snow. Low around 33. South southwest wind 11 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    Low: 33 °F

    Snow

  • Wednesday

    Wednesday: Snow. High near 38. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    High: 38 °F

    Snow

  • Wednesday Night

    Wednesday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 25. New snow accumulation of less than one inch possible.

    Low: 25 °F

    Chance Snow

  • Thursday

    Thursday: Snow likely, mainly after noon. Mostly cloudy, with a high near 36.

    High: 36 °F

    Snow Likely

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of rain before 1am. Snow level 7000 feet lowering to 6200 feet after midnight . Mostly cloudy, with a low around 39. Northeast wind 3 to 5 mph.
Monday
A chance of rain before 3pm, then a chance of showers and thunderstorms between 3pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Snow level 6100 feet rising to 6900 feet in the afternoon. Partly sunny, with a high near 49. Light and variable wind becoming west southwest 6 to 11 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night
A chance of rain, mixing with snow after 9pm, then gradually ending. Snow level 6700 feet lowering to 5600 feet after midnight . Mostly cloudy, with a low around 36. Southwest wind around 11 mph, with gusts as high as 23 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Tuesday
A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 40. Southwest wind 10 to 15 mph, with gusts as high as 28 mph. Little or no snow accumulation expected.
Tuesday Night
Snow. Low around 33. South southwest wind 11 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Wednesday
Snow. High near 38. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Wednesday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 25. New snow accumulation of less than one inch possible.
Thursday
Snow likely, mainly after noon. Mostly cloudy, with a high near 36.
Thursday Night
Partly cloudy, with a low around 25.
Friday
A slight chance of snow after noon. Mostly sunny, with a high near 41.
Friday Night
Partly cloudy, with a low around 27.
Saturday
Mostly sunny, with a high near 47.
Saturday Night
Partly cloudy, with a low around 31.
Sunday
A slight chance of rain and snow. Mostly sunny, with a high near 49.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
18 Miles SW Fortine MT
 48.58°N 115.15°W (Elev. 5600 ft)
Last Update:
2:01 pm MDT Apr 12, 2026
Forecast Valid:
11pm MDT Apr 12, 2026-6pm MDT Apr 19, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation