Powerful Winter Storm from the Upper Midwest into the Northeast; Severe Thunderstorms in the Midwest and Ohio Valley

A rapidly-intensifying storm is expected to bring heavy snow, blizzard conditions, and icing from the Upper Midwest through the Great Lakes and Northeast. Scattered severe thunderstorms may produce severe/damaging wind gusts and a couple of tornadoes across parts of the Midwest and lower Ohio Valley through the evening. Arctic air will expand across the central and southern U.S.. Read More >

Current conditions at

Nevada County Air Park (KGOO)

Lat: 39.224028°NLon: 121.003083°WElev: 3154.0ft.

Clear

48°F

9°C

Humidity 24%
Wind Speed N 0 MPH
Barometer 30.29 in (1025.74 mb)
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Last update 29 Dec 03:55 AM PST
Extended Forecast for

Grass Valley CA

Frost Advisory until December 29, 09:00am
Click here for hazard details and duration
Frost Advisory
  •  
    Frost Advisory until December 29, 09:00am

    NOW until 9:00am Mon

    Frost Advisory

  • Overnight

    Low: 34 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 58. East wind around 6 mph becoming calm  in the morning.

    High: 58 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 37. East northeast wind 3 to 5 mph.

    Low: 37 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 59. Light and variable wind.

    High: 59 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 42. Light east northeast wind.

    Low: 42 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Rain likely, mainly after 4pm.  Cloudy, with a high near 55. Chance of precipitation is 60%.

    High: 55 °F

    Chance Rain
    then Rain
    Likely

  • Wednesday Night

    Wednesday Night: Rain.  Low around 45. Chance of precipitation is 80%.

    Low: 45 °F

    Rain

  • New Year's Day

    New Year's Day: Rain.  Cloudy, with a high near 53.

    High: 53 °F

    Rain

Detailed Forecast

Overnight
Mostly clear, with a low around 34. East wind around 6 mph.
Monday
Sunny, with a high near 58. East wind around 6 mph becoming calm in the morning.
Monday Night
Clear, with a low around 37. East northeast wind 3 to 5 mph.
Tuesday
Sunny, with a high near 59. Light and variable wind.
Tuesday Night
Mostly cloudy, with a low around 42. Light east northeast wind.
Wednesday
Rain likely, mainly after 4pm. Cloudy, with a high near 55. Chance of precipitation is 60%.
Wednesday Night
Rain. Low around 45. Chance of precipitation is 80%.
New Year's Day
Rain. Cloudy, with a high near 53.
Thursday Night
Rain. Cloudy, with a low around 45.
Friday
Rain. Mostly cloudy, with a high near 54.
Friday Night
Rain. Cloudy, with a low around 44.
Saturday
Rain. Cloudy, with a high near 49.
Saturday Night
Rain likely. Cloudy, with a low around 42.
Sunday
Rain likely. Mostly cloudy, with a high near 49.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Grass Valley CA
 39.23°N 121.05°W (Elev. 2657 ft)
1:21 am PST Dec 29, 2025
4am PST Dec 29, 2025-6pm PST Jan 4, 2026
 
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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