Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Current conditions at

South Big Horn County Airport (KGEY)

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

Mostly Cloudy

29°F

-2°C

Humidity 50%
Wind Speed WNW 16 MPH
Barometer 30.27 in (1025.06 mb)
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Wind Chill17°F (-8°C)
Last update 18 Jan 08:53 PM MST
Extended Forecast for

20 Miles NNE Greybull/S Big Horn Airport WY

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 9. Wind chill values as low as -5. Blustery, with a north wind 16 to 22 mph, with gusts as high as 37 mph.

    Low: 9 °F

    Decreasing
    Clouds and
    Blustery

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 22. Wind chill values as low as zero. West northwest wind 7 to 10 mph.

    High: 22 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 18. West wind 6 to 8 mph becoming south southeast after midnight.

    Low: 18 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Snow showers likely, mainly after 11am.  Partly sunny, with a high near 24. Blustery, with a west southwest wind 9 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 29 mph.  Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 24 °F

    Snow Showers
    Likely and
    Blustery

  • Tuesday Night

    Tuesday Night: A 20 percent chance of snow showers after 11pm.  Partly cloudy, with a low around 13. Northwest wind 8 to 11 mph.

    Low: 13 °F

    Slight Chance
    Snow Showers

  • Wednesday

    Wednesday: A 30 percent chance of snow showers before 11am.  Mostly sunny, with a high near 18. North northwest wind 8 to 13 mph becoming west southwest in the afternoon. Winds could gust as high as 21 mph.

    High: 18 °F

    Chance Snow
    Showers then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 12. Southwest wind around 7 mph becoming south southeast in the evening.

    Low: 12 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 27.

    High: 27 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of snow showers.  Mostly cloudy, with a low around 12.

    Low: 12 °F

    Slight Chance
    Snow Showers

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 9. Wind chill values as low as -5. Blustery, with a north wind 16 to 22 mph, with gusts as high as 37 mph.
M.L.King Day
Sunny, with a high near 22. Wind chill values as low as zero. West northwest wind 7 to 10 mph.
Monday Night
Partly cloudy, with a low around 18. West wind 6 to 8 mph becoming south southeast after midnight.
Tuesday
Snow showers likely, mainly after 11am. Partly sunny, with a high near 24. Blustery, with a west southwest wind 9 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Tuesday Night
A 20 percent chance of snow showers after 11pm. Partly cloudy, with a low around 13. Northwest wind 8 to 11 mph.
Wednesday
A 30 percent chance of snow showers before 11am. Mostly sunny, with a high near 18. North northwest wind 8 to 13 mph becoming west southwest in the afternoon. Winds could gust as high as 21 mph.
Wednesday Night
Partly cloudy, with a low around 12. Southwest wind around 7 mph becoming south southeast in the evening.
Thursday
Partly sunny, with a high near 27.
Thursday Night
A 20 percent chance of snow showers. Mostly cloudy, with a low around 12.
Friday
A 40 percent chance of snow showers. Mostly cloudy, with a high near 17.
Friday Night
A chance of snow showers. Mostly cloudy, with a low around 6.
Saturday
A chance of snow showers. Partly sunny, with a high near 15.
Saturday Night
A chance of snow showers. Mostly cloudy, with a low around 7.
Sunday
A slight chance of snow showers. Partly sunny, with a high near 20.
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ABOUT THIS FORECAST

 
Point Forecast:
20 Miles NNE Greybull/S Big Horn Airport WY
 44.8°N 107.96°W (Elev. 7539 ft)
9:03 pm MST Jan 18, 2026
9pm MST Jan 18, 2026-6pm MST Jan 25, 2026
 
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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