National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Severe Thunderstorms in Portions of the Mississippi Valley and Great Lakes

A few severe thunderstorms with large hail, are expected across parts of the middle and upper Mississippi River Valley tonight through early morning. Snow and a wintry mix overnight in the Upper Midwest into the Great Lakes can cause hazardous travel conditions. Fire weather concerns continue for a large portion of the central and southern High Plains and Four Corners region this evening. Read More >

Hazardous Weather Conditions

Current conditions at

Riverton Regional Airport (KRIW)

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

Clear

45°F

7°C

Humidity 48%
Wind Speed N 18 MPH
Barometer 29.88 in (1011.85 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill37°F (3°C)
Last update 30 Mar 11:05 PM MDT
Extended Forecast for

Riverton WY

  • Tonight

    Tonight: Mostly cloudy, with a low around 34. North northeast wind 11 to 14 mph.

    Low: 34 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of rain and snow showers between 9am and 3pm. Mostly cloudy, with a high near 60. East northeast wind 6 to 13 mph becoming west southwest in the afternoon. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 60 °F

    Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers after 3am. Mostly cloudy, with a low around 35. North northeast wind 6 to 10 mph becoming west after midnight.

    Low: 35 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers likely, mainly between noon and 3pm. Mostly cloudy, with a high near 58. North wind 6 to 8 mph. Chance of precipitation is 70%.

    High: 58 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers, mainly before midnight. Mostly cloudy, with a low around 35. North wind 6 to 9 mph becoming south in the evening.

    Low: 35 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers likely, mainly after noon. Partly sunny, with a high near 60. Breezy, with a west wind 10 to 15 mph increasing to 19 to 24 mph in the afternoon. Winds could gust as high as 38 mph. Chance of precipitation is 60%.

    High: 60 °F

    Showers
    Likely and
    Breezy

  • Thursday Night

    Thursday Night: A chance of rain and snow showers before midnight, then a chance of snow showers. Mostly cloudy, with a low around 28. Breezy, with a west southwest wind 16 to 23 mph, with gusts as high as 32 mph. Chance of precipitation is 50%.

    Low: 28 °F

    Breezy.
    Chance
    Rain/Snow
    then Chance
    Snow Showers

  • Friday

    Friday: A 40 percent chance of snow showers. Partly sunny, with a high near 45. Breezy.

    High: 45 °F

    Chance Snow
    Showers and
    Breezy

  • Friday Night

    Friday Night: A 20 percent chance of snow showers before midnight. Mostly cloudy, with a low around 22.

    Low: 22 °F

    Slight Chance
    Snow Showers
    then Mostly
    Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 34. North northeast wind 11 to 14 mph.
Tuesday
A chance of rain and snow showers between 9am and 3pm. Mostly cloudy, with a high near 60. East northeast wind 6 to 13 mph becoming west southwest in the afternoon. Chance of precipitation is 30%. Little or no snow accumulation expected.
Tuesday Night
A 30 percent chance of showers after 3am. Mostly cloudy, with a low around 35. North northeast wind 6 to 10 mph becoming west after midnight.
Wednesday
Showers likely, mainly between noon and 3pm. Mostly cloudy, with a high near 58. North wind 6 to 8 mph. Chance of precipitation is 70%.
Wednesday Night
A 40 percent chance of showers, mainly before midnight. Mostly cloudy, with a low around 35. North wind 6 to 9 mph becoming south in the evening.
Thursday
Showers likely, mainly after noon. Partly sunny, with a high near 60. Breezy, with a west wind 10 to 15 mph increasing to 19 to 24 mph in the afternoon. Winds could gust as high as 38 mph. Chance of precipitation is 60%.
Thursday Night
A chance of rain and snow showers before midnight, then a chance of snow showers. Mostly cloudy, with a low around 28. Breezy, with a west southwest wind 16 to 23 mph, with gusts as high as 32 mph. Chance of precipitation is 50%.
Friday
A 40 percent chance of snow showers. Partly sunny, with a high near 45. Breezy.
Friday Night
A 20 percent chance of snow showers before midnight. Mostly cloudy, with a low around 22.
Saturday
Sunny, with a high near 56.
Saturday Night
Mostly clear, with a low around 27.
Sunday
Sunny, with a high near 64.
Sunday Night
Partly cloudy, with a low around 31.
Monday
Mostly sunny, with a high near 67.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Riverton WY
 43.02°N 108.38°W (Elev. 4931 ft)
Last Update:
10:01 pm MDT Mar 30, 2026
Forecast Valid:
11pm MDT Mar 30, 2026-6pm MDT Apr 6, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation