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 >

Hazardous Weather Conditions

Current conditions at

Riverton Regional Airport (KRIW)

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

Clear

15°F

-9°C

Humidity 58%
Wind Speed N 3 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 3°F (-16°C)
Visibility 10.00 mi
Last update 20 Jan 06:53 AM MST
Extended Forecast for

3 Miles WNW Arapahoe WY

  • Today

    Today: Mostly cloudy, then becoming sunny during the afternoon, with a high near 41. Breezy, with a west wind 10 to 17 mph becoming northeast in the afternoon. Winds could gust as high as 26 mph.

    High: 41 °F

    Partly Sunny
    then Sunny
    and Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 11. East wind 6 to 8 mph becoming west southwest after midnight.

    Low: 11 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 36. West northwest wind 6 to 9 mph becoming northeast in the morning.

    High: 36 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 9. Northeast wind around 6 mph becoming light and variable  in the evening.

    Low: 9 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 33. Light and variable wind becoming northeast 5 to 7 mph in the morning.

    High: 33 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 7. North northeast wind 6 to 8 mph.

    Low: 7 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 27. Northeast wind 5 to 8 mph.

    High: 27 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 4.

    Low: 4 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 33.

    High: 33 °F

    Sunny

Detailed Forecast

Today
Mostly cloudy, then becoming sunny during the afternoon, with a high near 41. Breezy, with a west wind 10 to 17 mph becoming northeast in the afternoon. Winds could gust as high as 26 mph.
Tonight
Mostly clear, with a low around 11. East wind 6 to 8 mph becoming west southwest after midnight.
Wednesday
Sunny, with a high near 36. West northwest wind 6 to 9 mph becoming northeast in the morning.
Wednesday Night
Partly cloudy, with a low around 9. Northeast wind around 6 mph becoming light and variable in the evening.
Thursday
Mostly sunny, with a high near 33. Light and variable wind becoming northeast 5 to 7 mph in the morning.
Thursday Night
Mostly cloudy, with a low around 7. North northeast wind 6 to 8 mph.
Friday
Partly sunny, with a high near 27. Northeast wind 5 to 8 mph.
Friday Night
Partly cloudy, with a low around 4.
Saturday
Sunny, with a high near 33.
Saturday Night
Mostly clear, with a low around 9.
Sunday
Sunny, with a high near 40.
Sunday Night
Partly cloudy, with a low around 15.
Monday
Partly sunny, with a high near 45.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Arapahoe WY
 42.99°N 108.56°W (Elev. 5197 ft)
6:33 am MST Jan 20, 2026
7am MST Jan 20, 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