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

Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Current conditions at

South Valley Regional Airport (KSVR)

Lat: 40.6196°NLon: 111.99016°WElev: 4596.0ft.

Overcast

45°F

7°C

Humidity 48%
Wind Speed SSW 8 MPH
Barometer 30.28 in (1025.4 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 07 Dec 07:15 PM MST
Extended Forecast for

Riverton UT

  • Tonight

    Tonight: Mostly cloudy, with a low around 34. South wind 3 to 6 mph.

    Low: 34 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 49. Calm wind becoming south around 5 mph.

    High: 49 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 34. South wind 3 to 6 mph.

    Low: 34 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 52. South wind 6 to 8 mph.

    High: 52 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain. Mostly cloudy, with a low around 40. South wind around 6 mph.

    Low: 40 °F

    Slight Chance
    Rain

  • Wednesday

    Wednesday: A 20 percent chance of rain before 11am. Mostly cloudy, with a high near 55.

    High: 55 °F

    Slight Chance
    Rain then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 40.

    Low: 40 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of rain before 11am. Partly sunny, with a high near 56.

    High: 56 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 34. South wind 3 to 6 mph.
Monday
Sunny, with a high near 49. Calm wind becoming south around 5 mph.
Monday Night
Mostly clear, with a low around 34. South wind 3 to 6 mph.
Tuesday
Partly sunny, with a high near 52. South wind 6 to 8 mph.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 40. South wind around 6 mph.
Wednesday
A 20 percent chance of rain before 11am. Mostly cloudy, with a high near 55.
Wednesday Night
A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 40.
Thursday
A slight chance of rain before 11am. Partly sunny, with a high near 56.
Thursday Night
Partly cloudy, with a low around 38.
Friday
Sunny, with a high near 56.
Friday Night
Mostly clear, with a low around 36.
Saturday
Sunny, with a high near 56.
Saturday Night
Mostly clear, with a low around 35.
Sunday
Sunny, with a high near 55.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Riverton UT
 40.55°N 111.95°W (Elev. 4544 ft)
Last Update:
2:04 pm MST Dec 7, 2025
Forecast Valid:
7pm MST Dec 7, 2025-6pm MST Dec 14, 2025
 
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