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

Strong Storm System Brings Heavy Mountain Snow to the Sierra Nevada and Critical Fire Weather Conditions to the Plains

A Pacific storm system will continue to bring low elevation rain and mountain snow to much of the West through Wednesday, with heavy mountain snow expected in the higher elevations of the Sierra Nevada. This system will also bring strong winds to the Intermountain West, Rockies, and Plains, which will create Critical fire weather conditions for the High Plains. Read More >

Current conditions at

JETTE (JETM8)

Lat: 47.76706°NLon: 114.23378°WElev: 3593.0ft.

NA

74°F

23°C

Humidity 28%
Wind Speed NNW 2 MPH
Barometer NA
Dewpoint 39°F (4°C)
Visibility NA
Last update 21 Apr 03:43 PM MDT
Extended Forecast for

3 Miles NW Big Arm MT

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 45. Calm wind.

    Low: 45 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Rain and thunderstorms likely before 1pm, then showers and possibly a thunderstorm between 1pm and 3pm, then rain after 3pm. High near 60. Calm wind becoming southwest 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 60 °F

    Chance
    Showers then
    Showers

  • Wednesday Night

    Wednesday Night: Rain before 3am, then rain, possibly mixed with snow. Low around 36. Southwest wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 100%. Little or no snow accumulation expected.

    Low: 36 °F

    Rain then
    Rain/Snow

  • Thursday

    Thursday: Rain, possibly mixed with snow. High near 46. Light and variable wind becoming north around 6 mph in the morning. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 46 °F

    Rain/Snow

  • Thursday Night

    Thursday Night: A chance of rain and snow before 9pm, then a chance of rain between 9pm and midnight, then a slight chance of snow after midnight. Mostly cloudy, with a low around 29. North wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 29 °F

    Chance
    Rain/Snow
    then Slight
    Chance Snow

  • Friday

    Friday: A 40 percent chance of snow, mainly after noon. Partly sunny, with a high near 45. Little or no snow accumulation expected.

    High: 45 °F

    Chance Snow

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 48.

    High: 48 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 45. Calm wind.
Wednesday
Rain and thunderstorms likely before 1pm, then showers and possibly a thunderstorm between 1pm and 3pm, then rain after 3pm. High near 60. Calm wind becoming southwest 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Rain before 3am, then rain, possibly mixed with snow. Low around 36. Southwest wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 100%. Little or no snow accumulation expected.
Thursday
Rain, possibly mixed with snow. High near 46. Light and variable wind becoming north around 6 mph in the morning. Chance of precipitation is 80%. Little or no snow accumulation expected.
Thursday Night
A chance of rain and snow before 9pm, then a chance of rain between 9pm and midnight, then a slight chance of snow after midnight. Mostly cloudy, with a low around 29. North wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%. Little or no snow accumulation expected.
Friday
A 40 percent chance of snow, mainly after noon. Partly sunny, with a high near 45. Little or no snow accumulation expected.
Friday Night
Mostly cloudy, with a low around 27.
Saturday
Mostly sunny, with a high near 48.
Saturday Night
Mostly cloudy, with a low around 27.
Sunday
Mostly sunny, with a high near 50.
Sunday Night
Partly cloudy, with a low around 30.
Monday
A slight chance of rain. Mostly sunny, with a high near 54.
Monday Night
Partly cloudy, with a low around 33.
Tuesday
A slight chance of rain. Mostly sunny, with a high near 60.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NW Big Arm MT
 47.84°N 114.32°W (Elev. 2940 ft)
Last Update:
2:00 pm MDT Apr 21, 2026
Forecast Valid:
4pm MDT Apr 21, 2026-6pm MDT Apr 28, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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