Significant and Catastrophic Flooding in the Pacific Northwest; Very Cold Temperatures in the Northern Plains

The atmospheric river over the Pacific Northwest will begin to subside today, but lingering rainfall will exacerbate ongoing catastrophic major river flooding, and landslides will continue across portions of western Washington and northwest Oregon for several days. Arctic air will plummet southward into the Northern Plains today, bringing cold air in the single digits to the region by Friday. Read More >

Hazardous Weather Conditions

Current conditions at

South Big Horn County Airport (KGEY)

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

Clear

37°F

3°C

Humidity 74%
Wind Speed SE 8 MPH
Barometer 29.81 in (1009.48 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill31°F (-1°C)
Last update 11 Dec 07:20 AM MST
Extended Forecast for

Greybull WY

  • Today

    Today: A 30 percent chance of rain, mainly after 5pm.  Mostly cloudy, with a high near 51. Southeast wind 5 to 7 mph.

    High: 51 °F

    Mostly Cloudy
    then Chance
    Rain

  • Tonight

    Tonight: A chance of rain before 2am, then a slight chance of rain and snow.  Mostly cloudy, with a low around 27. North wind around 6 mph becoming west northwest after midnight.  Chance of precipitation is 30%.

    Low: 27 °F

    Chance Rain
    then Slight
    Chance
    Rain/Snow

  • Friday

    Friday: A 20 percent chance of snow before 11am.  Cloudy, then gradually becoming mostly sunny, with a high near 38. Light northwest wind.

    High: 38 °F

    Slight Chance
    Snow then
    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 22. Calm wind becoming north 5 to 7 mph after midnight.

    Low: 22 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 39. Northwest wind 5 to 7 mph becoming light and variable.

    High: 39 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 21. Southeast wind around 6 mph.

    Low: 21 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 49. South southeast wind around 6 mph.

    High: 49 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

Detailed Forecast

Today
A 30 percent chance of rain, mainly after 5pm. Mostly cloudy, with a high near 51. Southeast wind 5 to 7 mph.
Tonight
A chance of rain before 2am, then a slight chance of rain and snow. Mostly cloudy, with a low around 27. North wind around 6 mph becoming west northwest after midnight. Chance of precipitation is 30%.
Friday
A 20 percent chance of snow before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 38. Light northwest wind.
Friday Night
Mostly cloudy, with a low around 22. Calm wind becoming north 5 to 7 mph after midnight.
Saturday
Partly sunny, with a high near 39. Northwest wind 5 to 7 mph becoming light and variable.
Saturday Night
Partly cloudy, with a low around 21. Southeast wind around 6 mph.
Sunday
Mostly sunny, with a high near 49. South southeast wind around 6 mph.
Sunday Night
Partly cloudy, with a low around 23.
Monday
Mostly sunny, with a high near 49.
Monday Night
Mostly cloudy, with a low around 28.
Tuesday
Mostly sunny, with a high near 53.
Tuesday Night
A slight chance of rain. Mostly cloudy, with a low around 28.
Wednesday
A slight chance of rain and snow. Partly sunny, with a high near 50.
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ABOUT THIS FORECAST

 
Point Forecast:
Greybull WY
 44.49°N 108.04°W (Elev. 3973 ft)
6:33 am MST Dec 11, 2025
7am MST Dec 11, 2025-6pm MST Dec 17, 2025
 
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Additional Resources

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Hourly Weather Forecast

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