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

Sinlaku Continues to Impact the Marianas; Severe Weather for the Central Plains and Northeast; Record Warmth for mid-Atlantic to Southeast

Sinlaku continues to affect the Marianas as it moves north through Friday. Meanwhile, severe thunderstorms are expected from the Northeast to the Mid-Mississippi Valley today and for the Central/Southern Plains on Friday. Considerable flooding impacts are ongoing in the Upper Great Lakes, and expected to continue through the weekend. Fire weather concerns persist in the Plains. Read More >

Hazardous Weather Conditions

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

Lat: 42.10386°NLon: 123.68519°WElev: 1389.0ft.

NA

47°F

8°C

Humidity 58%
Wind Speed NNE 6 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Wind Chill44°F (7°C)
Last update 16 Apr 09:52 AM PDT
Extended Forecast for

12 Miles NNE Happy Camp CA

Freeze Warning April 17, 03:00am until April 17, 09:00am
Click here for hazard details and duration
Freeze Warning

  • Today

    Today: Sunny, with a high near 37. Breezy, with a north northeast wind 20 to 22 mph, with gusts as high as 33 mph.

    High: 37 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 27. Northeast wind 15 to 20 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 30 mph.

    Low: 27 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 51. East southeast wind 9 to 11 mph.

    High: 51 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 38. North northwest wind 9 to 14 mph becoming south southwest after midnight. Winds could gust as high as 21 mph.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 56. West southwest wind 11 to 14 mph, with gusts as high as 21 mph.

    High: 56 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of rain, mainly after 11pm. Snow level 7600 feet lowering to 7100 feet after midnight . Mostly cloudy, with a low around 42.

    Low: 42 °F

    Chance Rain

  • Sunday

    Sunday: A 50 percent chance of rain. Snow level 6700 feet. Mostly cloudy, with a high near 47.

    High: 47 °F

    Chance Rain

  • Sunday Night

    Sunday Night: Rain likely. Snow level 6200 feet lowering to 5500 feet. Mostly cloudy, with a low around 39.

    Low: 39 °F

    Rain Likely

  • Monday

    Monday: Rain and snow likely, becoming all rain after 11am. Snow level rising to 5500 feet in the afternoon. Mostly cloudy, with a high near 42.

    High: 42 °F

    Rain/Snow
    Likely then
    Rain Likely

Detailed Forecast

Today
Sunny, with a high near 37. Breezy, with a north northeast wind 20 to 22 mph, with gusts as high as 33 mph.
Tonight
Mostly clear, with a low around 27. Northeast wind 15 to 20 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 30 mph.
Friday
Sunny, with a high near 51. East southeast wind 9 to 11 mph.
Friday Night
Partly cloudy, with a low around 38. North northwest wind 9 to 14 mph becoming south southwest after midnight. Winds could gust as high as 21 mph.
Saturday
Mostly sunny, with a high near 56. West southwest wind 11 to 14 mph, with gusts as high as 21 mph.
Saturday Night
A 30 percent chance of rain, mainly after 11pm. Snow level 7600 feet lowering to 7100 feet after midnight . Mostly cloudy, with a low around 42.
Sunday
A 50 percent chance of rain. Snow level 6700 feet. Mostly cloudy, with a high near 47.
Sunday Night
Rain likely. Snow level 6200 feet lowering to 5500 feet. Mostly cloudy, with a low around 39.
Monday
Rain and snow likely, becoming all rain after 11am. Snow level rising to 5500 feet in the afternoon. Mostly cloudy, with a high near 42.
Monday Night
Rain and snow likely, mainly before 11pm. Snow level 5700 feet lowering to 5200 feet after midnight . Mostly cloudy, with a low around 37.
Tuesday
Rain and snow showers likely. Some thunder is also possible. Snow level rising to 5800 feet in the afternoon. Mostly cloudy, with a high near 41.
Tuesday Night
Rain and snow likely. Snow level 6000 feet lowering to 5300 feet after midnight . Mostly cloudy, with a low around 36.
Wednesday
A chance of rain and snow. Snow level rising to 5800 feet in the afternoon. Partly sunny, with a high near 43.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
12 Miles NNE Happy Camp CA
 41.96°N 123.25°W (Elev. 5138 ft)
Last Update:
9:02 am PDT Apr 16, 2026
Forecast Valid:
10am PDT Apr 16, 2026-6pm PDT Apr 22, 2026
 
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