Strong Atmospheric River Bringing Heavy Rain to the Pacific Northwest; Areas of Snow in the North-Central and Eastern U.S.

A strong atmospheric river will bring prolonged heavy rainfall along with gusty winds to the Pacific Northwest through much of this week. The heavy rainfall may lead to widespread urban and river flooding. Accumulating snow is expected over parts of the central Appalachians and Mid-Atlantic today as well as the Upper Midwest and the Upper Great Lakes this evening into Tuesday. Read More >

Hazardous Weather Conditions

Current conditions at

Riverton Regional Airport (KRIW)

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

Partly Cloudy

46°F

8°C

Humidity 31%
Wind Speed WNW 20 MPH
Barometer 30.03 in (1016.93 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 08 Dec 03:35 PM MST
Extended Forecast for

Riverton Regional Airport WY

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 43. West southwest wind around 8 mph.

    High: 43 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 29. West wind 7 to 14 mph becoming south after midnight. Winds could gust as high as 22 mph.

    Low: 29 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 50. Light and variable wind becoming north 8 to 13 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 50 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of rain and snow showers after 11pm.  Mostly cloudy, with a low around 25. North wind 7 to 10 mph becoming south after midnight.  Chance of precipitation is 20%.

    Low: 25 °F

    Slight Chance
    Rain/Snow

  • Wednesday

    Wednesday: A slight chance of rain and snow showers before 8am, then a slight chance of rain showers between 8am and 11am.  Partly sunny, with a high near 52. Southwest wind 6 to 9 mph.  Chance of precipitation is 20%.

    High: 52 °F

    Slight Chance
    Rain/Snow
    then Partly
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 33. Southwest wind around 10 mph.

    Low: 33 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 55. Southwest wind 6 to 10 mph becoming west northwest in the afternoon.

    High: 55 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 46.

    High: 46 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 43. West southwest wind around 8 mph.
Tonight
Mostly cloudy, with a low around 29. West wind 7 to 14 mph becoming south after midnight. Winds could gust as high as 22 mph.
Tuesday
Partly sunny, with a high near 50. Light and variable wind becoming north 8 to 13 mph in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
A slight chance of rain and snow showers after 11pm. Mostly cloudy, with a low around 25. North wind 7 to 10 mph becoming south after midnight. Chance of precipitation is 20%.
Wednesday
A slight chance of rain and snow showers before 8am, then a slight chance of rain showers between 8am and 11am. Partly sunny, with a high near 52. Southwest wind 6 to 9 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly cloudy, with a low around 33. Southwest wind around 10 mph.
Thursday
Mostly sunny, with a high near 55. Southwest wind 6 to 10 mph becoming west northwest in the afternoon.
Thursday Night
Mostly cloudy, with a low around 25.
Friday
Partly sunny, with a high near 46.
Friday Night
Partly cloudy, with a low around 28.
Saturday
Mostly sunny, with a high near 51.
Saturday Night
Mostly cloudy, with a low around 25.
Sunday
Mostly sunny, with a high near 50.
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ABOUT THIS FORECAST

 
Point Forecast:
Riverton Regional Airport WY
 43.06°N 108.48°W (Elev. 5407 ft)
2:31 pm MST Dec 8, 2025
3pm MST Dec 8, 2025-6pm MST Dec 14, 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