Sinlaku Continues to Impact the Marianas; Severe Weather from the Central US to the Northeast; Late-Season Snow in the Northwest

Sinlaku continues to bring destructive winds, widespread heavy rain/flooding, and storm surge to the Marianas. Showers and severe thunderstorms are expected from the Northeast to the Mid-Mississippi Valley and to the Central/Southern Plains through Thursday. A front will produce late-season snowfall over the Cascades and Northern Rockies and coastal rain over the Northwest Coast through Thursday. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

45°F

7°C

Humidity 96%
Wind Speed WSW 6 MPH
Barometer NA
Dewpoint 44°F (7°C)
Visibility NA
Wind Chill42°F (6°C)
Last update 15 Apr 06:52 AM PDT
Extended Forecast for

9 Miles WNW Illinois Valley OR

Freeze Watch April 17, 03:00am until April 17, 09:00am
Frost Advisory April 16, 03:00am until April 16, 09:00am
Click here for hazard details and duration
Freeze Watch
Frost Advisory
  • Today

    Today: Rain, possibly mixed with snow, mainly before 1pm.  Snow level 5800 feet lowering to 3400 feet in the afternoon . High near 40. South southwest wind 10 to 20 mph becoming west in the afternoon. Winds could gust as high as 30 mph.  Chance of precipitation is 100%. Total daytime snow accumulation of less than a half inch possible.

    High: 40 °F

    Rain/Snow
    then
    Rain/Snow
    Likely

  • Tonight

    Tonight: A 40 percent chance of snow, mainly before 11pm.  Partly cloudy, with a low around 29. North northwest wind 5 to 13 mph, with gusts as high as 20 mph.  New snow accumulation of less than a half inch possible.

    Low: 29 °F

    Chance Snow

  • Thursday

    Thursday: Sunny, with a high near 46. North wind 6 to 13 mph, with gusts as high as 20 mph.

    High: 46 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 31. East northeast wind around 11 mph.

    Low: 31 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 55. East northeast wind 7 to 10 mph becoming northwest in the afternoon.

    High: 55 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Saturday

    Saturday: A 30 percent chance of rain after 11am.  Snow level 4900 feet rising to 6700 feet in the afternoon. Partly sunny, with a high near 55.

    High: 55 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Rain likely, mainly after 11pm.  Snow level 6900 feet lowering to 6200 feet after midnight . Mostly cloudy, with a low around 43.

    Low: 43 °F

    Rain Likely

  • Sunday

    Sunday: Rain.  Snow level 5800 feet lowering to 5200 feet. Mostly cloudy, with a high near 49.

    High: 49 °F

    Rain

Detailed Forecast

Today
Rain, possibly mixed with snow, mainly before 1pm. Snow level 5800 feet lowering to 3400 feet in the afternoon . High near 40. South southwest wind 10 to 20 mph becoming west in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%. Total daytime snow accumulation of less than a half inch possible.
Tonight
A 40 percent chance of snow, mainly before 11pm. Partly cloudy, with a low around 29. North northwest wind 5 to 13 mph, with gusts as high as 20 mph. New snow accumulation of less than a half inch possible.
Thursday
Sunny, with a high near 46. North wind 6 to 13 mph, with gusts as high as 20 mph.
Thursday Night
Mostly clear, with a low around 31. East northeast wind around 11 mph.
Friday
Sunny, with a high near 55. East northeast wind 7 to 10 mph becoming northwest in the afternoon.
Friday Night
Partly cloudy, with a low around 39.
Saturday
A 30 percent chance of rain after 11am. Snow level 4900 feet rising to 6700 feet in the afternoon. Partly sunny, with a high near 55.
Saturday Night
Rain likely, mainly after 11pm. Snow level 6900 feet lowering to 6200 feet after midnight . Mostly cloudy, with a low around 43.
Sunday
Rain. Snow level 5800 feet lowering to 5200 feet. Mostly cloudy, with a high near 49.
Sunday Night
Rain likely. Snow level 5100 feet. Mostly cloudy, with a low around 42.
Monday
Rain likely. Snow level 4800 feet rising to 5600 feet in the afternoon. Mostly cloudy, with a high near 53.
Monday Night
Rain likely. Snow level 5600 feet. Mostly cloudy, with a low around 42.
Tuesday
A chance of rain. Snow level 5300 feet rising to 5900 feet in the afternoon. Partly sunny, with a high near 52.
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ABOUT THIS FORECAST

 
Point Forecast:
9 Miles WNW Illinois Valley OR
 42.15°N 123.85°W (Elev. 3356 ft)
5:56 am PDT Apr 15, 2026
7am PDT Apr 15, 2026-6pm PDT Apr 21, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database