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

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Hazardous Weather Conditions

Current conditions at

Geyser (MTGYS)

Lat: 47.25°NLon: 110.48°WElev: 4221.0ft.

NA

33°F

1°C

Humidity 90%
Wind Speed NE 7 MPH
Barometer NA
Dewpoint 30°F (-1°C)
Visibility NA
Wind Chill27°F (-3°C)
Last update 25 Dec 03:30 AM MST
Extended Forecast for

Geraldine MT

Dense Fog Advisory December 25, 03:46am until December 25, 09:00am
Winter Weather Advisory December 25, 03:46am until December 25, 05:00am
Click here for hazard details and duration
Dense Fog Advisory
Winter Weather Advisory
  •  
    Dense Fog Advisory December 25, 03:46am until December 25, 09:00am
    Winter Weather Advisory December 25, 03:46am until December 25, 05:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Overnight

    Low: 23 °F

    Rain/Snow
    Likely and
    Patchy Dense
    Fog

  • Christmas Day

    Christmas Day: A 10 percent chance of rain before 7am. Patchy fog before 11am. Otherwise, mostly sunny, with a high near 47. South southeast wind around 6 mph.

    High: 47 °F

    Slight Chance
    Rain and
    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 31. South wind 6 to 9 mph.

    Low: 31 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 52. South wind 8 to 14 mph, with gusts as high as 21 mph.

    High: 52 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 20 percent chance of snow after 11pm. Partly cloudy, with a low around 8. West southwest wind 13 to 15 mph, with gusts as high as 22 mph.

    Low: 8 °F

    Slight Chance
    Snow

  • Saturday

    Saturday: A 50 percent chance of snow. Mostly cloudy, with a high near 31. Blustery, with a northwest wind 18 to 22 mph, with gusts as high as 31 mph. New snow accumulation of less than a half inch possible.

    High: 31 °F

    Chance Snow
    and Blustery

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 0. West wind 9 to 18 mph, with gusts as high as 25 mph.

    Low: 0 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 26. South wind 3 to 5 mph.

    High: 26 °F

    Sunny

Detailed Forecast

Overnight
Rain and snow likely, mainly before 4am. Patchy dense fog. Otherwise, mostly cloudy, with a low around 23. Northwest wind around 6 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Christmas Day
A 10 percent chance of rain before 7am. Patchy fog before 11am. Otherwise, mostly sunny, with a high near 47. South southeast wind around 6 mph.
Thursday Night
Partly cloudy, with a low around 31. South wind 6 to 9 mph.
Friday
Mostly sunny, with a high near 52. South wind 8 to 14 mph, with gusts as high as 21 mph.
Friday Night
A 20 percent chance of snow after 11pm. Partly cloudy, with a low around 8. West southwest wind 13 to 15 mph, with gusts as high as 22 mph.
Saturday
A 50 percent chance of snow. Mostly cloudy, with a high near 31. Blustery, with a northwest wind 18 to 22 mph, with gusts as high as 31 mph. New snow accumulation of less than a half inch possible.
Saturday Night
Partly cloudy, with a low around 0. West wind 9 to 18 mph, with gusts as high as 25 mph.
Sunday
Sunny, with a high near 26. South wind 3 to 5 mph.
Sunday Night
Partly cloudy, with a low around 16.
Monday
Mostly sunny, with a high near 43.
Monday Night
Mostly cloudy, with a low around 28.
Tuesday
Partly sunny, with a high near 48.
Tuesday Night
Mostly cloudy, with a low around 27.
Wednesday
A slight chance of rain and snow. Partly sunny, with a high near 43.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Geraldine MT
 47.6°N 110.26°W (Elev. 3192 ft)
Last Update:
2:11 am MST Dec 25, 2025
Forecast Valid:
3am MST Dec 25, 2025-6pm MST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation