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

Lake Effect Snow through Saturday: A Series of Storms Impact the West

Lake effect snow showers will continue through Saturday downwind of Lakes Erie, Ontario and the eastern portion of Lake Superior. A series of storm systems will continue to impact California and the Pacific Northwest through the weekend and into next week, bringing widespread rainfall, mountain snowfall, and gusty winds. Coastal flooding is expected in northern California. Read More >

Hazardous Weather Conditions

Current conditions at

Riverton Regional Airport (KRIW)

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

Mostly Cloudy

36°F

2°C

Humidity 69%
Wind Speed WSW 6 MPH
Barometer 29.76 in (1007.79 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill31°F (-1°C)
Last update 02 Jan 07:05 AM MST
Extended Forecast for

3 Miles WNW Arapahoe WY

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 53. Light west wind becoming northwest 9 to 14 mph in the afternoon. Winds could gust as high as 22 mph.

    High: 53 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Increasing clouds, with a low around 27. West northwest wind around 5 mph becoming calm in the evening.

    Low: 27 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Partly sunny, with a high near 50. Southwest wind 5 to 7 mph becoming east southeast in the morning.

    High: 50 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 30. South wind 8 to 10 mph.

    Low: 30 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 54. Southwest wind 8 to 14 mph, with gusts as high as 22 mph.

    High: 54 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of showers, mainly before 11pm. Mostly cloudy, with a low around 27. South southwest wind 8 to 13 mph.

    Low: 27 °F

    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 49. West southwest wind 6 to 10 mph.

    High: 49 °F

    Mostly Sunny

  • Monday Night

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

    Low: 23 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 47.

    High: 47 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 53. Light west wind becoming northwest 9 to 14 mph in the afternoon. Winds could gust as high as 22 mph.
Tonight
Increasing clouds, with a low around 27. West northwest wind around 5 mph becoming calm in the evening.
Saturday
Partly sunny, with a high near 50. Southwest wind 5 to 7 mph becoming east southeast in the morning.
Saturday Night
Mostly cloudy, with a low around 30. South wind 8 to 10 mph.
Sunday
Mostly sunny, with a high near 54. Southwest wind 8 to 14 mph, with gusts as high as 22 mph.
Sunday Night
A 30 percent chance of showers, mainly before 11pm. Mostly cloudy, with a low around 27. South southwest wind 8 to 13 mph.
Monday
Mostly sunny, with a high near 49. West southwest wind 6 to 10 mph.
Monday Night
Partly cloudy, with a low around 23.
Tuesday
Mostly sunny, with a high near 47.
Tuesday Night
Partly cloudy, with a low around 23.
Wednesday
Partly sunny, with a high near 45.
Wednesday Night
Mostly cloudy, with a low around 19.
Thursday
Partly sunny, with a high near 37.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Arapahoe WY
 42.99°N 108.56°W (Elev. 5197 ft)
Last Update:
5:47 am MST Jan 2, 2026
Forecast Valid:
7am MST Jan 2, 2026-6pm MST Jan 8, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation