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

South Big Horn County Airport (KGEY)

Lat: 44.5174°NLon: 108.0752°WElev: 3934.0ft.

Clear

58°F

14°C

Humidity 47%
Wind Speed SE 19 MPH
Barometer 29.7 in (1005.76 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 25 Dec 03:53 AM MST
Extended Forecast for

10 Miles ENE Shell WY

  • Overnight

    Overnight: A 10 percent chance of rain after 5am. Mostly cloudy, with a steady temperature around 44. Breezy, with a south southeast wind around 21 mph, with gusts as high as 31 mph.

    Low: 44 °F

    Slight Chance
    Rain and
    Breezy

  • Christmas Day

    Christmas Day: A chance of rain and snow before 11am, then a slight chance of rain between 11am and 2pm. Snow level 9000 feet lowering to 7000 feet in the afternoon . Cloudy, then gradually becoming mostly sunny, with a high near 49. Breezy, with a south wind 13 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    High: 49 °F

    Breezy.
    Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 32. South wind 11 to 14 mph, with gusts as high as 21 mph.

    Low: 32 °F

    Partly Cloudy

  • Friday

    Friday: A chance of snow after 11am, mixing with rain after 2pm. Partly sunny, with a high near 41. Breezy, with a south wind 14 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.

    High: 41 °F

    Breezy.
    Chance Snow
    then Chance
    Rain/Snow

  • Friday Night

    Friday Night: A 20 percent chance of snow before 11pm. Mostly cloudy, with a low around 24. South southwest wind 11 to 14 mph, with gusts as high as 21 mph.

    Low: 24 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Saturday

    Saturday: Snow likely, mainly after 11am. Partly sunny, with a high near 32. South southwest wind 11 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 60%.

    High: 32 °F

    Snow Likely

  • Saturday Night

    Saturday Night: Snow likely, mainly before 11pm. Partly cloudy, with a low around 5. Northwest wind 6 to 10 mph. Chance of precipitation is 60%.

    Low: 5 °F

    Snow Likely
    then Slight
    Chance Snow

  • Sunday

    Sunday: Sunny, with a high near 19.

    High: 19 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 10.

    Low: 10 °F

    Mostly Clear

Detailed Forecast

Overnight
A 10 percent chance of rain after 5am. Mostly cloudy, with a steady temperature around 44. Breezy, with a south southeast wind around 21 mph, with gusts as high as 31 mph.
Christmas Day
A chance of rain and snow before 11am, then a slight chance of rain between 11am and 2pm. Snow level 9000 feet lowering to 7000 feet in the afternoon . Cloudy, then gradually becoming mostly sunny, with a high near 49. Breezy, with a south wind 13 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Thursday Night
Partly cloudy, with a low around 32. South wind 11 to 14 mph, with gusts as high as 21 mph.
Friday
A chance of snow after 11am, mixing with rain after 2pm. Partly sunny, with a high near 41. Breezy, with a south wind 14 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Friday Night
A 20 percent chance of snow before 11pm. Mostly cloudy, with a low around 24. South southwest wind 11 to 14 mph, with gusts as high as 21 mph.
Saturday
Snow likely, mainly after 11am. Partly sunny, with a high near 32. South southwest wind 11 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 60%.
Saturday Night
Snow likely, mainly before 11pm. Partly cloudy, with a low around 5. Northwest wind 6 to 10 mph. Chance of precipitation is 60%.
Sunday
Sunny, with a high near 19.
Sunday Night
Mostly clear, with a low around 10.
Monday
Sunny, with a high near 33.
Monday Night
Mostly cloudy, with a low around 23.
Tuesday
Partly sunny, with a high near 40.
Tuesday Night
Mostly cloudy, with a low around 26.
Wednesday
Partly sunny, with a high near 41.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
10 Miles ENE Shell WY
 44.59°N 107.6°W (Elev. 6532 ft)
Last Update:
2:32 am MST Dec 25, 2025
Forecast Valid:
4am MST Dec 25, 2025-6pm MST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation