Super Typhoon Sinlaku to Impact the Marianas and Guam; Severe Weather Threat from the Central Plains to the Great Lakes

Super Typhoon Sinlaku will bring destructive winds, widespread heavy rain/flooding, and thunderstorms to the Marianas Islands into Wednesday. Tropical Storm conditions are likely over Guam. Severe thunderstorms and heavy rain are likely across the Upper Mississippi Valley and Great Lakes region with potential for large to very large hail, damaging wind, and tornadoes through Tuesday. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

53°F

12°C

Humidity 65%
Wind Speed NW 2 MPH
Barometer NA
Dewpoint 41°F (5°C)
Visibility NA
Last update 13 Apr 11:52 AM PDT
Extended Forecast for

9 Miles ENE Happy Camp CA

  • This Afternoon

    This Afternoon: A 20 percent chance of showers after 2pm.  Mostly sunny, with a high near 60. West northwest wind 3 to 6 mph.

    High: 60 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, with a low around 38. West wind around 5 mph becoming calm  in the evening.

    Low: 38 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 64. Calm wind becoming west 5 to 9 mph in the afternoon.

    High: 64 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 50 percent chance of rain.  Snow level 5200 feet lowering to 4400 feet after midnight . Mostly cloudy, with a low around 40. West wind 6 to 10 mph, with gusts as high as 18 mph.

    Low: 40 °F

    Chance Rain

  • Wednesday

    Wednesday: Rain.  Snow level 4600 feet. High near 53. Southwest wind 7 to 13 mph, with gusts as high as 28 mph.  Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 53 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain showers likely before 2am, then a slight chance of rain and snow showers.  Snow level 4000 feet lowering to 2100 feet after midnight . Mostly cloudy, with a low around 31. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 31 °F

    Showers
    Likely then
    Slight Chance
    Rain/Snow

  • Thursday

    Thursday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers after 2pm. Mostly sunny, with a high near 60. West northwest wind 3 to 6 mph.
Tonight
Mostly cloudy, with a low around 38. West wind around 5 mph becoming calm in the evening.
Tuesday
Increasing clouds, with a high near 64. Calm wind becoming west 5 to 9 mph in the afternoon.
Tuesday Night
A 50 percent chance of rain. Snow level 5200 feet lowering to 4400 feet after midnight . Mostly cloudy, with a low around 40. West wind 6 to 10 mph, with gusts as high as 18 mph.
Wednesday
Rain. Snow level 4600 feet. High near 53. Southwest wind 7 to 13 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday Night
Rain showers likely before 2am, then a slight chance of rain and snow showers. Snow level 4000 feet lowering to 2100 feet after midnight . Mostly cloudy, with a low around 31. Chance of precipitation is 70%. Little or no snow accumulation expected.
Thursday
Sunny, with a high near 56.
Thursday Night
Mostly clear, with a low around 30.
Friday
Sunny, with a high near 69.
Friday Night
Partly cloudy, with a low around 38.
Saturday
Partly sunny, with a high near 71.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 43.
Sunday
Rain likely. Mostly cloudy, with a high near 60.
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ABOUT THIS FORECAST

 
Point Forecast:
9 Miles ENE Happy Camp CA
 41.84°N 123.19°W (Elev. 1421 ft)
11:26 am PDT Apr 13, 2026
12pm PDT Apr 13, 2026-6pm PDT Apr 19, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database