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

Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

Hazardous Weather Conditions

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

71°F

22°C

Humidity 25%
Wind Speed NNE 8 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Last update 18 Jun 12:52 AM PDT
Extended Forecast for

15 Miles W Happy Camp CA

Fire Weather Watch June 19, 04:00am until June 19, 07:00pm
Click here for hazard details and duration
Fire Weather Watch

  • Overnight

    Overnight: Mostly cloudy, with a low around 62. East wind around 7 mph.

    Low: 62 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy through mid morning, then gradual clearing, with a high near 75. Light and variable wind becoming west 5 to 8 mph in the afternoon.

    High: 75 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 56. West northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 56 °F

    Clear

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 65. Light and variable wind becoming west 5 to 7 mph in the afternoon.

    High: 65 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 53. West wind 5 to 7 mph becoming calm in the evening.

    Low: 53 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 52.

    Low: 52 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 71.

    High: 71 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 58.

    Low: 58 °F

    Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 62. East wind around 7 mph.
Thursday
Mostly cloudy through mid morning, then gradual clearing, with a high near 75. Light and variable wind becoming west 5 to 8 mph in the afternoon.
Thursday Night
Clear, with a low around 56. West northwest wind 5 to 7 mph becoming calm in the evening.
Juneteenth
Mostly sunny, with a high near 65. Light and variable wind becoming west 5 to 7 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 53. West wind 5 to 7 mph becoming calm in the evening.
Saturday
Sunny, with a high near 64.
Saturday Night
Clear, with a low around 52.
Sunday
Sunny, with a high near 71.
Sunday Night
Clear, with a low around 58.
Monday
Sunny, with a high near 76.
Monday Night
Clear, with a low around 63.
Tuesday
Sunny, with a high near 74.
Tuesday Night
Clear, with a low around 60.
Wednesday
Sunny, with a high near 73.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
15 Miles W Happy Camp CA
 41.78°N 123.65°W (Elev. 5098 ft)
Last Update:
1:46 am PDT Jun 18, 2026
Forecast Valid:
1am PDT Jun 18, 2026-6pm PDT Jun 24, 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