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 >

Hazardous Weather Conditions

Winter Weather Advisory until April 12, 11:00 AM PDT

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

40°F

4°C

Humidity	100%
Wind Speed	NNE 1 MPH
Barometer	NA
Dewpoint	40°F (4°C)
Visibility	NA
Last update	12 Apr 05:52 AM PDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Happy Camp CA

Winter Weather Advisory April 12, 06:30am until April 12, 11:00am

Click here for hazard details and duration

...

Winter Weather Advisory April 12, 06:30am until April 12, 11:00am
NOW until 11:00am Sun
Winter Weather Advisory
Today
High: 58 °F
Chance
Showers then
Showers
Tonight
Low: 39 °F
Rain Likely
then Slight
Chance Rain
Monday
High: 58 °F
Chance Rain
Monday Night
Low: 36 °F
Slight Chance
Rain then
Mostly Cloudy
Tuesday
High: 63 °F
Mostly Sunny
Tuesday Night
Low: 39 °F
Rain Likely
Wednesday
High: 52 °F
Rain
Wednesday Night
Low: 30 °F
Chance Rain

Detailed Forecast

Today

Rain and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then rain likely and possibly a thunderstorm after 5pm. Snow level 3800 feet rising to 5100 feet in the afternoon. High near 58. Calm wind becoming west 5 to 7 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight

Rain likely, mainly before 7pm. Mostly cloudy, with a low around 39. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.

Monday

A 50 percent chance of rain. Partly sunny, with a high near 58. Light and variable wind.

Monday Night

A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 36. Light west wind.

Tuesday

Mostly sunny, with a high near 63. Calm wind becoming west southwest 5 to 7 mph in the afternoon.

Tuesday Night

Rain likely, mainly after 11pm. Snow level 5200 feet lowering to 4100 feet. Mostly cloudy, with a low around 39. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Wednesday

Rain. High near 52. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

Wednesday Night

A chance of rain, mainly before 11pm. Snow level 4700 feet lowering to 2400 feet after midnight . Partly cloudy, with a low around 30.

Thursday

Sunny, with a high near 59.

Thursday Night

Clear, with a low around 31.

Friday

Sunny, with a high near 68.

Friday Night

Partly cloudy, with a low around 36.