Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Current conditions at

JETTE (JETM8)

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

NA

34°F

1°C

Humidity 100%
Wind Speed SSE 0 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Last update 24 Dec 01:43 AM MST
Extended Forecast for

5 Miles NE Big Arm MT

  • Overnight

    Overnight: Mostly cloudy, with a low around 35. Calm wind.

    Low: 35 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Rain likely, mainly after 5pm.  Mostly cloudy, with a high near 45. Light and variable wind.  Chance of precipitation is 60%.

    High: 45 °F

    Mostly Cloudy
    then Rain
    Likely

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain, mainly before midnight.  Cloudy, with a low around 37. Light and variable wind.  New precipitation amounts of less than a tenth of an inch possible.

    Low: 37 °F

    Chance Rain

  • Christmas Day

    Christmas Day: A 30 percent chance of rain, mainly after 11am.  Mostly cloudy, with a high near 45. Light south wind.

    High: 45 °F

    Chance Rain

  • Thursday Night

    Thursday Night: Rain likely, mainly after 11pm.  Mostly cloudy, with a low around 37. South wind 3 to 6 mph.  Chance of precipitation is 60%.

    Low: 37 °F

    Rain Likely

  • Friday

    Friday: Rain before 5pm, then rain, possibly mixed with snow.  High near 41. Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 41 °F

    Rain then
    Rain/Snow

  • Friday Night

    Friday Night: Rain, possibly mixed with snow, becoming all snow after 8pm.  Low around 28. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 28 °F

    Rain/Snow
    then Snow
    Likely

  • Saturday

    Saturday: A chance of snow, mainly before 11am.  Mostly sunny, with a high near 35.

    High: 35 °F

    Chance Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 35. Calm wind.
Wednesday
Rain likely, mainly after 5pm. Mostly cloudy, with a high near 45. Light and variable wind. Chance of precipitation is 60%.
Wednesday Night
A 40 percent chance of rain, mainly before midnight. Cloudy, with a low around 37. Light and variable wind. New precipitation amounts of less than a tenth of an inch possible.
Christmas Day
A 30 percent chance of rain, mainly after 11am. Mostly cloudy, with a high near 45. Light south wind.
Thursday Night
Rain likely, mainly after 11pm. Mostly cloudy, with a low around 37. South wind 3 to 6 mph. Chance of precipitation is 60%.
Friday
Rain before 5pm, then rain, possibly mixed with snow. High near 41. Chance of precipitation is 90%. Little or no snow accumulation expected.
Friday Night
Rain, possibly mixed with snow, becoming all snow after 8pm. Low around 28. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Saturday
A chance of snow, mainly before 11am. Mostly sunny, with a high near 35.
Saturday Night
Mostly cloudy, with a low around 23.
Sunday
Mostly cloudy, with a high near 32.
Sunday Night
Mostly cloudy, with a low around 25.
Monday
Mostly cloudy, with a high near 36.
Monday Night
Mostly cloudy, with a low around 28.
Tuesday
Mostly cloudy, with a high near 37.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles NE Big Arm MT
 47.85°N 114.2°W (Elev. 2995 ft)
1:02 am MST Dec 24, 2025
2am MST Dec 24, 2025-6pm MST Dec 30, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database