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

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Current conditions at

South Valley Regional Airport (KSVR)

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

Overcast

63°F

17°C

Humidity 39%
Wind Speed S 19 MPH
Barometer 29.96 in (1014.56 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 24 Dec 02:15 PM MST
Extended Forecast for

Riverton UT

  • This Afternoon

    This Afternoon: A 30 percent chance of rain. Mostly cloudy, with a high near 61. South southeast wind around 16 mph.

    High: 61 °F

    Chance Rain

  • Tonight

    Tonight: Rain, mainly after 11pm. Low around 52. South southeast wind 14 to 17 mph, with gusts as high as 32 mph. Chance of precipitation is 80%.

    Low: 52 °F

    Rain

  • Christmas Day

    Christmas Day: Rain, mainly before 8am, then a chance of showers and thunderstorms after 11am. High near 58. South wind 14 to 20 mph, with gusts as high as 33 mph. Chance of precipitation is 80%.

    High: 58 °F

    Showers then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 45. South wind around 16 mph, with gusts as high as 34 mph.

    Low: 45 °F

    Chance Rain

  • Friday

    Friday: Rain, mainly between 11am and 5pm, then showers and possibly a thunderstorm after 5pm. High near 53. South wind 15 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 80%.

    High: 53 °F

    Showers

  • Friday Night

    Friday Night: Rain before 5am, then rain likely, possibly mixed with snow. Some thunder is also possible. Low around 35. Chance of precipitation is 90%. Little or no snow accumulation expected.

    Low: 35 °F

    Showers then
    Rain/Snow
    Likely

  • Saturday

    Saturday: Rain and snow likely before 11am, then a chance of snow between 11am and 2pm, then a chance of rain and snow after 2pm. Mostly cloudy, with a high near 43. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 43 °F

    Rain/Snow
    Likely

  • Saturday Night

    Saturday Night: A slight chance of rain and snow before 8pm, then a slight chance of snow between 8pm and 11pm. Partly cloudy, with a low around 22.

    Low: 22 °F

    Slight Chance
    Rain/Snow
    then Partly
    Cloudy

  • Sunday

    Sunday: Sunny, with a high near 37.

    High: 37 °F

    Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of rain. Mostly cloudy, with a high near 61. South southeast wind around 16 mph.
Tonight
Rain, mainly after 11pm. Low around 52. South southeast wind 14 to 17 mph, with gusts as high as 32 mph. Chance of precipitation is 80%.
Christmas Day
Rain, mainly before 8am, then a chance of showers and thunderstorms after 11am. High near 58. South wind 14 to 20 mph, with gusts as high as 33 mph. Chance of precipitation is 80%.
Thursday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 45. South wind around 16 mph, with gusts as high as 34 mph.
Friday
Rain, mainly between 11am and 5pm, then showers and possibly a thunderstorm after 5pm. High near 53. South wind 15 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 80%.
Friday Night
Rain before 5am, then rain likely, possibly mixed with snow. Some thunder is also possible. Low around 35. Chance of precipitation is 90%. Little or no snow accumulation expected.
Saturday
Rain and snow likely before 11am, then a chance of snow between 11am and 2pm, then a chance of rain and snow after 2pm. Mostly cloudy, with a high near 43. Chance of precipitation is 60%. Little or no snow accumulation expected.
Saturday Night
A slight chance of rain and snow before 8pm, then a slight chance of snow between 8pm and 11pm. Partly cloudy, with a low around 22.
Sunday
Sunny, with a high near 37.
Sunday Night
Mostly clear, with a low around 20.
Monday
Sunny, with a high near 39.
Monday Night
Mostly clear, with a low around 23.
Tuesday
Sunny, with a high near 43.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Riverton UT
 40.53°N 111.95°W (Elev. 4544 ft)
Last Update:
2:04 pm MST Dec 24, 2025
Forecast Valid:
2pm MST Dec 24, 2025-6pm MST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation