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 62%
Wind Speed N 10 MPH
Barometer 30.26 in (1024.72 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill13°F (-11°C)
Last update 19 Jan 02:05 AM MST
Extended Forecast for

3 Miles WNW Arapahoe WY

  • Overnight

    Overnight: Partly cloudy, with a low around 16. North wind around 6 mph.

    Low: 16 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 40. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 40 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 20. Light and variable wind becoming west around 5 mph in the evening.

    Low: 20 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 44. Breezy, with a west southwest wind 6 to 16 mph becoming east northeast in the afternoon. Winds could gust as high as 24 mph.

    High: 44 °F

    Partly Sunny
    then Mostly
    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 13. South southeast wind around 6 mph becoming light and variable.

    Low: 13 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 35. Light and variable wind becoming east northeast 5 to 10 mph in the morning.

    High: 35 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 11. North northeast wind around 5 mph becoming calm  in the evening.

    Low: 11 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 38.

    High: 38 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 11.

    Low: 11 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 16. North wind around 6 mph.
M.L.King Day
Sunny, with a high near 40. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 20. Light and variable wind becoming west around 5 mph in the evening.
Tuesday
Mostly sunny, with a high near 44. Breezy, with a west southwest wind 6 to 16 mph becoming east northeast in the afternoon. Winds could gust as high as 24 mph.
Tuesday Night
Mostly clear, with a low around 13. South southeast wind around 6 mph becoming light and variable.
Wednesday
Sunny, with a high near 35. Light and variable wind becoming east northeast 5 to 10 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 11. North northeast wind around 5 mph becoming calm in the evening.
Thursday
Partly sunny, with a high near 38.
Thursday Night
Mostly cloudy, with a low around 11.
Friday
Partly sunny, with a high near 28.
Friday Night
Partly cloudy, with a low around 10.
Saturday
Sunny, with a high near 36.
Saturday Night
Mostly clear, with a low around 13.
Sunday
Sunny, with a high near 42.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Arapahoe WY
 42.99°N 108.56°W (Elev. 5197 ft)
12:47 am MST Jan 19, 2026
2am MST Jan 19, 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