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 95%
Wind Speed SW 3 MPH
Barometer NA
Dewpoint 51°F (11°C)
Visibility NA
Last update 10 Apr 08:52 PM PDT
Extended Forecast for

12 Miles NNE Happy Camp CA

Winter Weather Advisory April 11, 08:00pm until April 12, 11:00am
Click here for hazard details and duration
Winter Weather Advisory
  • Tonight

    Tonight: Rain likely before 4am, then a chance of rain and snow between 4am and 5am, then a chance of rain after 5am.  Snow level 6600 feet lowering to 5900 feet after midnight . Mostly cloudy, with a low around 39. South southwest wind around 10 mph.  Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 39 °F

    Rain Likely
    then Chance
    Rain/Snow

  • Saturday

    Saturday: Rain and snow showers before 3pm, then rain, possibly mixed with snow showers. Some thunder is also possible.  Snow level 5600 feet. Temperature falling to around 37 by 5pm. South wind 10 to 16 mph, with gusts as high as 21 mph.  Chance of precipitation is 100%. Little or no snow accumulation expected.

    High: 40 °F

    Rain/Snow

  • Saturday Night

    Saturday Night: Rain, possibly mixed with snow, becoming all snow after 8pm.  Low around 35. West southwest wind 8 to 10 mph becoming north northeast in the evening.  Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    Low: 35 °F

    Rain/Snow
    then Snow
    Likely

  • Sunday

    Sunday: Snow before 11am, then snow showers after 11am. Some thunder is also possible.  High near 37. Southwest wind 9 to 11 mph.  Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 37 °F

    Snow

  • Sunday Night

    Sunday Night: Snow, mainly before 11pm.  Low around 36. West wind 9 to 13 mph.  Chance of precipitation is 80%. Little or no snow accumulation expected.

    Low: 36 °F

    Snow then
    Chance Snow

  • Monday

    Monday: Snow likely before 5pm.  Mostly cloudy, with a high near 40. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 40 °F

    Snow Likely

  • Monday Night

    Monday Night: A chance of rain, mixing with snow after 8pm, then gradually ending.  Mostly cloudy, with a low around 34. Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 34 °F

    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 45.

    High: 45 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of rain before 8pm, then a chance of rain and snow.  Mostly cloudy, with a low around 36.

    Low: 36 °F

    Chance
    Rain/Snow

Detailed Forecast

Tonight
Rain likely before 4am, then a chance of rain and snow between 4am and 5am, then a chance of rain after 5am. Snow level 6600 feet lowering to 5900 feet after midnight . Mostly cloudy, with a low around 39. South southwest wind around 10 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Saturday
Rain and snow showers before 3pm, then rain, possibly mixed with snow showers. Some thunder is also possible. Snow level 5600 feet. Temperature falling to around 37 by 5pm. South wind 10 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Saturday Night
Rain, possibly mixed with snow, becoming all snow after 8pm. Low around 35. West southwest wind 8 to 10 mph becoming north northeast in the evening. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Sunday
Snow before 11am, then snow showers after 11am. Some thunder is also possible. High near 37. Southwest wind 9 to 11 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Sunday Night
Snow, mainly before 11pm. Low around 36. West wind 9 to 13 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Monday
Snow likely before 5pm. Mostly cloudy, with a high near 40. Chance of precipitation is 60%. Little or no snow accumulation expected.
Monday Night
A chance of rain, mixing with snow after 8pm, then gradually ending. Mostly cloudy, with a low around 34. Chance of precipitation is 40%. Little or no snow accumulation expected.
Tuesday
Partly sunny, with a high near 45.
Tuesday Night
A chance of rain before 8pm, then a chance of rain and snow. Mostly cloudy, with a low around 36.
Wednesday
Rain and snow likely. Mostly cloudy, with a high near 38.
Wednesday Night
A chance of rain and snow. Mostly cloudy, with a low around 29.
Thursday
Sunny, with a high near 45.
Thursday Night
Mostly clear, with a low around 31.
Friday
A slight chance of rain. Sunny, with a high near 50.
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ABOUT THIS FORECAST

 
Point Forecast:
12 Miles NNE Happy Camp CA
 41.96°N 123.25°W (Elev. 5138 ft)
4:41 pm PDT Apr 10, 2026
9pm PDT Apr 10, 2026-6pm PDT Apr 17, 2026
 
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