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

Strong Atmospheric River Bringing Heavy Rain to the Pacific Northwest; Areas of Snow in the North-Central and Eastern U.S.

A strong atmospheric river will bring prolonged heavy rainfall along with gusty winds to the Pacific Northwest through much of this week. The heavy rainfall may lead to widespread urban and river flooding. Accumulating snow is expected over parts of the central Appalachians and Mid-Atlantic today as well as the Upper Midwest and the Upper Great Lakes this evening into Tuesday. Read More >

Hazardous Weather Conditions

Current conditions at

South Big Horn County Airport (KGEY)

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

Clear

29°F

-2°C

Humidity 74%
Wind Speed SE 4 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 08 Dec 10:53 AM MST
Extended Forecast for

Greybull WY

  • Today

    Today: Partly sunny, with a high near 43. Southeast wind 3 to 6 mph.

    High: 43 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 29. Southeast wind 6 to 9 mph.

    Low: 29 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Scattered rain showers after 11am, mixing with snow after 5pm. Mostly cloudy, with a high near 47. Breezy, with a southeast wind 5 to 10 mph becoming north northwest 11 to 16 mph in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    High: 47 °F

    Isolated
    Showers then
    Scattered
    Rain/Snow and
    Breezy

  • Tuesday Night

    Tuesday Night: A chance of rain and snow before 11pm, then a chance of snow. Mostly cloudy, with a low around 28. North northwest wind 6 to 8 mph becoming south after midnight. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

    Low: 28 °F

    Chance
    Rain/Snow
    then Chance
    Snow

  • Wednesday

    Wednesday: A chance of rain and snow before 11am, then a chance of rain. Mostly cloudy, with a high near 46. Southeast wind around 6 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    High: 46 °F

    Chance
    Rain/Snow
    then Chance
    Rain

  • Wednesday Night

    Wednesday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 28. East northeast wind around 6 mph becoming northwest after midnight.

    Low: 28 °F

    Chance Rain

  • Thursday

    Thursday: A chance of rain and snow. Mostly cloudy, with a high near 43. West northwest wind around 6 mph. Chance of precipitation is 40%.

    High: 43 °F

    Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: A chance of rain and snow before 11pm, then a chance of snow. Mostly cloudy, with a low around 16. Chance of precipitation is 40%.

    Low: 16 °F

    Chance
    Rain/Snow
    then Chance
    Snow

  • Friday

    Friday: A 20 percent chance of snow before 11am. Mostly cloudy, with a high near 29.

    High: 29 °F

    Slight Chance
    Snow then
    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 43. Southeast wind 3 to 6 mph.
Tonight
Mostly cloudy, with a low around 29. Southeast wind 6 to 9 mph.
Tuesday
Scattered rain showers after 11am, mixing with snow after 5pm. Mostly cloudy, with a high near 47. Breezy, with a southeast wind 5 to 10 mph becoming north northwest 11 to 16 mph in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Tuesday Night
A chance of rain and snow before 11pm, then a chance of snow. Mostly cloudy, with a low around 28. North northwest wind 6 to 8 mph becoming south after midnight. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.
Wednesday
A chance of rain and snow before 11am, then a chance of rain. Mostly cloudy, with a high near 46. Southeast wind around 6 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 28. East northeast wind around 6 mph becoming northwest after midnight.
Thursday
A chance of rain and snow. Mostly cloudy, with a high near 43. West northwest wind around 6 mph. Chance of precipitation is 40%.
Thursday Night
A chance of rain and snow before 11pm, then a chance of snow. Mostly cloudy, with a low around 16. Chance of precipitation is 40%.
Friday
A 20 percent chance of snow before 11am. Mostly cloudy, with a high near 29.
Friday Night
Mostly cloudy, with a low around 15.
Saturday
Partly sunny, with a high near 36.
Saturday Night
Partly cloudy, with a low around 16.
Sunday
Mostly sunny, with a high near 43.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Greybull WY
 44.49°N 108.04°W (Elev. 3973 ft)
Last Update:
11:01 am MST Dec 8, 2025
Forecast Valid:
11am MST Dec 8, 2025-6pm MST Dec 14, 2025
 
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