Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Hazardous Weather Conditions

Current conditions at

Riverton Regional Airport (KRIW)

Lat: 43.06219° N Lon: 108.44701° W Elev: 5443.0 ft.

Overcast

18°F

-8°C

Humidity 67%
Wind Speed N 16 MPH
Barometer 30.02 in (1016.59 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Wind Chill3°F (-16°C)
Last update 28 Dec 12:35 AM MST
Detailed forecast for

Wind River Basin

Tonight
Partly cloudy with a 40 percent chance of snow. Cold with lows around 10 above. North winds 10 to 15 mph with gusts up to 30 mph.
Sunday
Sunny, cooler with highs in the mid 20s. Northwest winds around 10 mph with gusts up to 25 mph.
Sunday Night
Mostly clear. Cold with lows around 8 above. Southwest winds around 10 mph after midnight.
Monday
Mostly sunny. Highs in the lower 30s. South winds around 10 mph in the morning.
Monday Night
Mostly clear. Cold with lows 14 to 18. Southwest winds around 10 mph.
Tuesday
Partly cloudy. Highs in the upper 30s.
Tuesday Night
Mostly clear. Cold with lows 16 to 22.
Wednesday
Mostly sunny. Highs in the mid 40s.
Wednesday Night
Partly cloudy. Lows in the mid 20s.
New Years Day
Partly cloudy. Highs around 50.
Thursday Night
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 20s.
Friday
Mostly cloudy in the morning, then becoming partly cloudy. Highs in the upper 40s.
Friday Night
Partly cloudy. Lows in the mid 20s.
Saturday
Partly cloudy. Highs in the lower 40s.



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1132 PM MST Sat Dec 27 2025
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database