Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds from the Upper Midwest into the Northeast

A prolonged atmospheric river will continue to impact the Pacific Northwest into the Northern Rockies with heavy rainfall, areas of urban and river flooding, landslides, heavy mountain snow, and gusty winds into Thursday. A strong clipper system will bring the threat of heavy snow and high winds across the Upper Midwest/Great Lakes as well as portions of the interior Northeast and Appalachians. Read More >

Hazardous Weather Conditions

Current conditions at

Riverton Regional Airport (KRIW)

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

Overcast

36°F

2°C

Humidity 86%
Wind Speed S 5 MPH
Barometer 30.1 in (1019.3 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 09 Dec 09:00 PM MST
Extended Forecast for

Riverton WY

  • Tonight

    Tonight: Mostly cloudy, with a low around 27. Northwest wind 6 to 9 mph becoming south southeast after midnight.

    Low: 27 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 51. West southwest wind 6 to 8 mph.

    High: 51 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 31. Southwest wind around 9 mph.

    Low: 31 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 55. South southwest wind 6 to 8 mph.

    High: 55 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 29. Southwest wind 6 to 8 mph.

    Low: 29 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 54. Southwest wind 5 to 8 mph.

    High: 54 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 29. Southwest wind around 8 mph.

    Low: 29 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 48.

    High: 48 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 27. Northwest wind 6 to 9 mph becoming south southeast after midnight.
Wednesday
Partly sunny, with a high near 51. West southwest wind 6 to 8 mph.
Wednesday Night
Partly cloudy, with a low around 31. Southwest wind around 9 mph.
Thursday
Mostly sunny, with a high near 55. South southwest wind 6 to 8 mph.
Thursday Night
Partly cloudy, with a low around 29. Southwest wind 6 to 8 mph.
Friday
Mostly sunny, with a high near 54. Southwest wind 5 to 8 mph.
Friday Night
Partly cloudy, with a low around 29. Southwest wind around 8 mph.
Saturday
Mostly sunny, with a high near 48.
Saturday Night
Partly cloudy, with a low around 23.
Sunday
Mostly sunny, with a high near 50.
Sunday Night
Partly cloudy, with a low around 25.
Monday
Mostly sunny, with a high near 49.
Monday Night
Partly cloudy, with a low around 27.
Tuesday
Mostly sunny, with a high near 51.
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ABOUT THIS FORECAST

 
Point Forecast:
Riverton WY
 43.04°N 108.41°W (Elev. 5046 ft)
7:47 pm MST Dec 9, 2025
9pm MST Dec 9, 2025-6pm MST Dec 16, 2025
 
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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