Hawaii and Guam Concerns; Record Warmth Spreads Eastward; Heavy Snow for Sierra-Nevada; Severe Weather for the Plains

A very active spring pattern with tropical concerns across the Pacific. Heavy rainfall will continue to impact Hawaii this weekend. Meanwhile we continue to monitor a developing typhoon that may affect Guam into early next week. For the Lower 48, heavy snow for mountains of California this weekend, increase threat for severe thunderstorms next week for the Plains and record warmth spreads east. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

52°F

11°C

Humidity 88%
Wind Speed SW 2 MPH
Barometer NA
Dewpoint 49°F (9°C)
Visibility NA
Last update 11 Apr 01:52 PM PDT
Extended Forecast for

16 Miles SE Agness OR

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm.  High near 52. West southwest wind around 6 mph becoming light and variable.  Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 52 °F

    Showers

  • Tonight

    Tonight: Showers.  Snow level 5200 feet lowering to 4300 feet after midnight . Low around 42. East wind around 5 mph becoming calm.  Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 42 °F

    Showers

  • Sunday

    Sunday: Showers.  Snow level 3900 feet rising to 4600 feet in the afternoon. High near 53. Calm wind becoming west 5 to 8 mph in the afternoon.  Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 53 °F

    Showers

  • Sunday Night

    Sunday Night: Showers.  Snow level 4400 feet. Low around 45. West northwest wind 6 to 8 mph.  Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 45 °F

    Showers

  • Monday

    Monday: Showers.  Snow level 4200 feet. High near 52. West wind 5 to 7 mph.  Chance of precipitation is 80%.

    High: 52 °F

    Showers

  • Monday Night

    Monday Night: A 40 percent chance of showers before 11pm.  Snow level 4600 feet lowering to 3700 feet after midnight . Mostly cloudy, with a low around 41.

    Low: 41 °F

    Chance
    Showers then
    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers after 11am.  Snow level 3400 feet rising to 4300 feet in the afternoon. Partly sunny, with a high near 57.

    High: 57 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: Rain, mainly after 11pm.  Snow level 4100 feet. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Rain

  • Wednesday

    Wednesday: Rain.  Cloudy, with a high near 50.

    High: 50 °F

    Rain

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. High near 52. West southwest wind around 6 mph becoming light and variable. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers. Snow level 5200 feet lowering to 4300 feet after midnight . Low around 42. East wind around 5 mph becoming calm. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
Showers. Snow level 3900 feet rising to 4600 feet in the afternoon. High near 53. Calm wind becoming west 5 to 8 mph in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Showers. Snow level 4400 feet. Low around 45. West northwest wind 6 to 8 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Showers. Snow level 4200 feet. High near 52. West wind 5 to 7 mph. Chance of precipitation is 80%.
Monday Night
A 40 percent chance of showers before 11pm. Snow level 4600 feet lowering to 3700 feet after midnight . Mostly cloudy, with a low around 41.
Tuesday
A 20 percent chance of showers after 11am. Snow level 3400 feet rising to 4300 feet in the afternoon. Partly sunny, with a high near 57.
Tuesday Night
Rain, mainly after 11pm. Snow level 4100 feet. Mostly cloudy, with a low around 44.
Wednesday
Rain. Cloudy, with a high near 50.
Wednesday Night
Rain likely before 11pm, then a chance of rain and snow. Snow level 4100 feet lowering to 2100 feet after midnight . Mostly cloudy, with a low around 35.
Thursday
A slight chance of rain and snow. Snow level 1800 feet rising to 3400 feet in the afternoon. Sunny, with a high near 57.
Thursday Night
Mostly clear, with a low around 37.
Friday
Sunny, with a high near 67.
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ABOUT THIS FORECAST

 
Point Forecast:
16 Miles SE Agness OR
 42.38°N 123.82°W (Elev. 1316 ft)
12:26 pm PDT Apr 11, 2026
2pm PDT Apr 11, 2026-6pm PDT Apr 17, 2026
 
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