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

16 Miles SE Agness OR

  • This Afternoon

    This Afternoon: A 50 percent chance of showers, mainly before 2pm.  Snow level 4700 feet. Partly sunny, with a high near 47. West northwest wind around 7 mph.

    High: 47 °F

    Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, with a low around 37. West northwest wind around 6 mph becoming calm  in the evening.

    Low: 37 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of rain after 4pm.  Snow level 3100 feet rising to 4300 feet in the afternoon. Partly sunny, with a high near 49. Light west wind becoming west southwest 5 to 10 mph in the afternoon.

    High: 49 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: Rain.  Snow level 4100 feet rising to 4800 feet after midnight. Low around 42. South southwest wind around 11 mph, with gusts as high as 25 mph.  Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 42 °F

    Rain

  • Wednesday

    Wednesday: Rain, possibly mixed with snow before 11am, then rain between 11am and 5pm, then rain likely, possibly mixed with snow after 5pm.  Snow level 5000 feet lowering to 3600 feet in the afternoon . High near 45. South southwest wind 13 to 17 mph becoming west in the afternoon. Winds could gust as high as 32 mph.  Chance of precipitation is 100%. Little or no snow accumulation expected.

    High: 45 °F

    Rain/Snow

  • Wednesday Night

    Wednesday Night: Snow showers likely, possibly mixed with rain before 11pm, then a chance of snow showers.  Mostly cloudy, with a low around 34. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 34 °F

    Rain/Snow
    Likely then
    Chance Snow
    Showers

  • Thursday

    Thursday: A chance of snow before 11am, then a slight chance of rain and snow between 11am and 2pm, then a slight chance of rain after 2pm.  Snow level rising to 3200 feet in the afternoon. Mostly sunny, with a high near 48. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 48 °F

    Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 50 percent chance of showers, mainly before 2pm. Snow level 4700 feet. Partly sunny, with a high near 47. West northwest wind around 7 mph.
Tonight
Mostly cloudy, with a low around 37. West northwest wind around 6 mph becoming calm in the evening.
Tuesday
A 20 percent chance of rain after 4pm. Snow level 3100 feet rising to 4300 feet in the afternoon. Partly sunny, with a high near 49. Light west wind becoming west southwest 5 to 10 mph in the afternoon.
Tuesday Night
Rain. Snow level 4100 feet rising to 4800 feet after midnight. Low around 42. South southwest wind around 11 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
Rain, possibly mixed with snow before 11am, then rain between 11am and 5pm, then rain likely, possibly mixed with snow after 5pm. Snow level 5000 feet lowering to 3600 feet in the afternoon . High near 45. South southwest wind 13 to 17 mph becoming west in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Wednesday Night
Snow showers likely, possibly mixed with rain before 11pm, then a chance of snow showers. Mostly cloudy, with a low around 34. Chance of precipitation is 70%. Little or no snow accumulation expected.
Thursday
A chance of snow before 11am, then a slight chance of rain and snow between 11am and 2pm, then a slight chance of rain after 2pm. Snow level rising to 3200 feet in the afternoon. Mostly sunny, with a high near 48. Chance of precipitation is 30%. Little or no snow accumulation expected.
Thursday Night
Mostly clear, with a low around 35.
Friday
Mostly sunny, with a high near 59.
Friday Night
Mostly cloudy, with a low around 41.
Saturday
Partly sunny, with a high near 58.
Saturday Night
A chance of rain. Snow level 5500 feet. Mostly cloudy, with a low around 45.
Sunday
Rain likely. Snow level 5100 feet lowering to 4600 feet. Mostly cloudy, with a high near 49.
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ABOUT THIS FORECAST

 
Point Forecast:
16 Miles SE Agness OR
 42.4°N 123.83°W (Elev. 2582 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