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

40°F

4°C

Humidity 100%
Wind Speed ESE 0 MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Last update 12 Apr 01:52 AM PDT
Extended Forecast for

5 Miles NNW Cave Junction OR

  • Overnight

    Overnight: Rain likely, mainly after 5am.  Snow level 4400 feet. Mostly cloudy, with a steady temperature around 41. Light west northwest wind.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 41 °F

    Rain Likely

  • Sunday

    Sunday: Rain and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of rain and thunderstorms after 5pm.  Snow level 4000 feet rising to 4900 feet in the afternoon. High near 56. Calm wind becoming west 5 to 7 mph in the afternoon.  Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 56 °F

    Chance
    Showers then
    Showers

  • Sunday Night

    Sunday Night: Rain likely, mainly before 9pm.  Snow level 4600 feet. Mostly cloudy, with a low around 40. West wind 5 to 9 mph becoming calm  in the evening.  Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 40 °F

    Rain Likely
    then Chance
    Rain

  • Monday

    Monday: Rain likely, mainly after 11am.  Snow level 4300 feet rising to 4900 feet in the afternoon. Mostly cloudy, with a high near 54. Calm wind becoming west around 6 mph in the afternoon.  Chance of precipitation is 60%.

    High: 54 °F

    Rain Likely

  • Monday Night

    Monday Night: A 30 percent chance of rain before 11pm.  Snow level 5000 feet lowering to 3900 feet after midnight . Mostly cloudy, with a low around 36. West wind around 5 mph becoming calm  in the evening.

    Low: 36 °F

    Chance Rain
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 58.

    High: 58 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Rain, mainly after 11pm.  Snow level 4200 feet. Low around 40. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 40 °F

    Rain

  • Wednesday

    Wednesday: Rain.  Snow level 5000 feet lowering to 4500 feet in the afternoon . Cloudy, with a high near 51.

    High: 51 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain likely before 8pm, then rain and snow likely.  Snow level 3900 feet lowering to 2000 feet after midnight . Mostly cloudy, with a low around 30.

    Low: 30 °F

    Rain/Snow
    Likely

Detailed Forecast

Overnight
Rain likely, mainly after 5am. Snow level 4400 feet. Mostly cloudy, with a steady temperature around 41. Light west northwest wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Rain and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of rain and thunderstorms after 5pm. Snow level 4000 feet rising to 4900 feet in the afternoon. High near 56. Calm wind becoming west 5 to 7 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Rain likely, mainly before 9pm. Snow level 4600 feet. Mostly cloudy, with a low around 40. West wind 5 to 9 mph becoming calm in the evening. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Rain likely, mainly after 11am. Snow level 4300 feet rising to 4900 feet in the afternoon. Mostly cloudy, with a high near 54. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 60%.
Monday Night
A 30 percent chance of rain before 11pm. Snow level 5000 feet lowering to 3900 feet after midnight . Mostly cloudy, with a low around 36. West wind around 5 mph becoming calm in the evening.
Tuesday
Partly sunny, with a high near 58.
Tuesday Night
Rain, mainly after 11pm. Snow level 4200 feet. Low around 40. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
Rain. Snow level 5000 feet lowering to 4500 feet in the afternoon . Cloudy, with a high near 51.
Wednesday Night
Rain likely before 8pm, then rain and snow likely. Snow level 3900 feet lowering to 2000 feet after midnight . Mostly cloudy, with a low around 30.
Thursday
Sunny, with a high near 57.
Thursday Night
Mostly clear, with a low around 31.
Friday
Sunny, with a high near 65.
Friday Night
Partly cloudy, with a low around 37.
Saturday
Mostly sunny, with a high near 68.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles NNW Cave Junction OR
 42.25°N 123.69°W (Elev. 1499 ft)
11:26 pm PDT Apr 11, 2026
2am PDT Apr 12, 2026-6pm PDT Apr 18, 2026
 
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Additional Resources

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