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

36°F

2°C

Humidity 69%
Wind Speed ESE 5 MPH
Barometer 30.03 in (1016.93 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 08 Dec 12:53 PM MST
Extended Forecast for

Greybull/S Big Horn Airport WY

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 43. Southeast wind around 6 mph.

    High: 43 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 29. Southeast wind 7 to 9 mph, with gusts as high as 20 mph.

    Low: 29 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Scattered showers, mainly between 11am and 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%.

    High: 47 °F

    Scattered
    Showers and
    Breezy

  • Tuesday Night

    Tuesday Night: A slight chance of rain and snow showers before 9pm, then a chance of snow showers.  Mostly cloudy, with a low around 25. North northwest wind 6 to 10 mph becoming south southeast after midnight. Winds could gust as high as 20 mph.  Chance of precipitation is 30%.

    Low: 25 °F

    Chance
    Rain/Snow
    then Chance
    Snow Showers

  • Wednesday

    Wednesday: A chance of snow showers before 8am, then a chance of rain and snow showers between 8am and 11am, then a slight chance of rain showers after 11am.  Mostly cloudy, with a high near 45. Southeast wind around 6 mph.  Chance of precipitation is 50%. Little or no snow accumulation expected.

    High: 45 °F

    Chance
    Rain/Snow
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers, mainly after 11pm.  Mostly cloudy, with a low around 31. South southeast wind around 6 mph.

    Low: 31 °F

    Chance
    Showers

  • Thursday

    Thursday: A 40 percent chance of showers.  Mostly cloudy, with a high near 47. Light and variable wind becoming north northwest 5 to 8 mph in the afternoon.

    High: 47 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of rain and snow showers before 11pm, then a chance of snow showers.  Mostly cloudy, with a low around 17. Chance of precipitation is 40%.

    Low: 17 °F

    Chance
    Rain/Snow
    then Chance
    Snow Showers

  • Friday

    Friday: A 20 percent chance of snow showers before 11am.  Mostly cloudy, with a high near 34.

    High: 34 °F

    Slight Chance
    Snow Showers
    then Partly
    Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 43. Southeast wind around 6 mph.
Tonight
Mostly cloudy, with a low around 29. Southeast wind 7 to 9 mph, with gusts as high as 20 mph.
Tuesday
Scattered showers, mainly between 11am and 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%.
Tuesday Night
A slight chance of rain and snow showers before 9pm, then a chance of snow showers. Mostly cloudy, with a low around 25. North northwest wind 6 to 10 mph becoming south southeast after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Wednesday
A chance of snow showers before 8am, then a chance of rain and snow showers between 8am and 11am, then a slight chance of rain showers after 11am. Mostly cloudy, with a high near 45. Southeast wind around 6 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Wednesday Night
A 30 percent chance of showers, mainly after 11pm. Mostly cloudy, with a low around 31. South southeast wind around 6 mph.
Thursday
A 40 percent chance of showers. Mostly cloudy, with a high near 47. Light and variable wind becoming north northwest 5 to 8 mph in the afternoon.
Thursday Night
A chance of rain and snow showers before 11pm, then a chance of snow showers. Mostly cloudy, with a low around 17. Chance of precipitation is 40%.
Friday
A 20 percent chance of snow showers before 11am. Mostly cloudy, with a high near 34.
Friday Night
Mostly cloudy, with a low around 18.
Saturday
Mostly sunny, with a high near 41.
Saturday Night
Partly cloudy, with a low around 18.
Sunday
Partly sunny, with a high near 45.
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ABOUT THIS FORECAST

 
Point Forecast:
Greybull/S Big Horn Airport WY
 44.51°N 108.07°W (Elev. 3799 ft)
12:32 pm MST Dec 8, 2025
1pm MST Dec 8, 2025-6pm MST Dec 14, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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