Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Hazardous Weather Conditions

Current conditions at

Riverton Regional Airport (KRIW)

Lat: 43.06219°NLon: 108.44701°WElev: 5443.0ft.

Clear

28°F

-2°C

Humidity 50%
Wind Speed E 3 MPH
Barometer 30.1 in (1019.3 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Last update 21 Jan 12:00 PM MST
Extended Forecast for

3 Miles WNW Arapahoe WY

  • This Afternoon

    This Afternoon: Sunny, with a high near 34. East northeast wind 6 to 8 mph.

    High: 34 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 8. North northeast wind around 5 mph becoming light and variable  in the evening.

    Low: 8 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 29. Light north wind becoming northeast 5 to 9 mph in the morning.

    High: 29 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 6. Wind chill values as low as -5. Northeast wind 7 to 10 mph.

    Low: 6 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 21. Northeast wind 6 to 11 mph.

    High: 21 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around -1. Northeast wind 5 to 9 mph becoming light and variable  after midnight.

    Low: -1 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 28. Calm wind becoming north northeast around 6 mph in the afternoon.

    High: 28 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 2.

    Low: 2 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 34. East northeast wind 6 to 8 mph.
Tonight
Partly cloudy, with a low around 8. North northeast wind around 5 mph becoming light and variable in the evening.
Thursday
Mostly sunny, with a high near 29. Light north wind becoming northeast 5 to 9 mph in the morning.
Thursday Night
Mostly cloudy, with a low around 6. Wind chill values as low as -5. Northeast wind 7 to 10 mph.
Friday
Partly sunny, with a high near 21. Northeast wind 6 to 11 mph.
Friday Night
Partly cloudy, with a low around -1. Northeast wind 5 to 9 mph becoming light and variable after midnight.
Saturday
Sunny, with a high near 28. Calm wind becoming north northeast around 6 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 2.
Sunday
Mostly sunny, with a high near 31.
Sunday Night
Partly cloudy, with a low around 6.
Monday
Mostly sunny, with a high near 41.
Monday Night
Partly cloudy, with a low around 15.
Tuesday
Mostly sunny, with a high near 44.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Arapahoe WY
 42.99°N 108.56°W (Elev. 5197 ft)
12:02 pm MST Jan 21, 2026
12pm MST Jan 21, 2026-6pm MST Jan 27, 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