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

Riverton Regional Airport (KRIW)

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

Clear

23°F

-5°C

Humidity 57%
Wind Speed N 0 MPH
Barometer 30.1 in (1019.3 mb)
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Last update 19 Jan 08:20 PM MST
Extended Forecast for

3 Miles WNW Arapahoe WY

  • Tonight

    Tonight: Mostly clear, with a low around 18. West northwest wind 7 to 14 mph becoming southwest after midnight. Winds could gust as high as 20 mph.

    Low: 18 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly cloudy, then becoming sunny during the afternoon, with a high near 44. Breezy, with a west southwest wind 10 to 18 mph becoming northeast in the afternoon. Winds could gust as high as 28 mph.

    High: 44 °F

    Partly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 12. South southeast wind around 6 mph becoming west southwest after midnight.

    Low: 12 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 36. West wind 6 to 8 mph becoming northeast in the afternoon.

    High: 36 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 10. North wind around 6 mph becoming light and variable  in the evening.

    Low: 10 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 34. Northeast wind 3 to 8 mph.

    High: 34 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 9. Northeast wind around 8 mph.

    Low: 9 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 26.

    High: 26 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 5.

    Low: 5 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 18. West northwest wind 7 to 14 mph becoming southwest after midnight. Winds could gust as high as 20 mph.
Tuesday
Mostly cloudy, then becoming sunny during the afternoon, with a high near 44. Breezy, with a west southwest wind 10 to 18 mph becoming northeast in the afternoon. Winds could gust as high as 28 mph.
Tuesday Night
Mostly clear, with a low around 12. South southeast wind around 6 mph becoming west southwest after midnight.
Wednesday
Sunny, with a high near 36. West wind 6 to 8 mph becoming northeast in the afternoon.
Wednesday Night
Partly cloudy, with a low around 10. North wind around 6 mph becoming light and variable in the evening.
Thursday
Mostly sunny, with a high near 34. Northeast wind 3 to 8 mph.
Thursday Night
Mostly cloudy, with a low around 9. Northeast wind around 8 mph.
Friday
Partly sunny, with a high near 26.
Friday Night
Partly cloudy, with a low around 5.
Saturday
Sunny, with a high near 36.
Saturday Night
Mostly clear, with a low around 10.
Sunday
Mostly sunny, with a high near 42.
Sunday Night
Partly cloudy, with a low around 17.
Monday
Mostly sunny, with a high near 49.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Arapahoe WY
 42.99°N 108.56°W (Elev. 5197 ft)
7:46 pm MST Jan 19, 2026
8pm MST Jan 19, 2026-6pm MST Jan 26, 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