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.

46°F

8°C

Humidity	94%
Wind Speed	NE 1 MPH
Barometer	NA
Dewpoint	44°F (7°C)
Visibility	NA
Last update	12 Apr 09:52 AM PDT

More Information:

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

Extended Forecast for

9 Miles ENE Happy Camp CA

Winter Weather Advisory April 12, 10:10am until April 12, 11:00am

Click here for hazard details and duration

...

Winter Weather Advisory April 12, 10:10am until April 12, 11:00am
NOW until 11:00am Sun
Winter Weather Advisory
Today
High: 58 °F
Chance
Showers then
Showers
Tonight
Low: 40 °F
Rain Likely
then Slight
Chance Rain
Monday
High: 58 °F
Chance Rain
Monday Night
Low: 37 °F
Slight Chance
Rain then
Mostly Cloudy
Tuesday
High: 63 °F
Mostly Sunny
Tuesday Night
Low: 39 °F
Chance Rain
Wednesday
High: 54 °F
Rain
Wednesday Night
Low: 30 °F
Rain Likely

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 4100 feet rising to 5200 feet in the afternoon. High near 58. Calm wind becoming west 5 to 8 mph in the afternoon. Chance of precipitation is 80%.

Tonight

Rain likely before 11pm, then a slight chance of rain after 1am. Mostly cloudy, with a low around 40. West northwest wind 3 to 7 mph. Chance of precipitation is 60%.

Monday

A 40 percent chance of rain. Snow level 4400 feet rising to 5200 feet in the afternoon. Partly sunny, with a high near 58. Light west wind increasing to 5 to 10 mph in the afternoon.

Monday Night

A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 37. West wind 5 to 9 mph becoming calm in the evening.

Tuesday

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

Tuesday Night

A 50 percent chance of rain. Snow level 5500 feet lowering to 4200 feet. Mostly cloudy, with a low around 39.

Wednesday

Rain. Snow level 4400 feet rising to 5100 feet. High near 54. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Wednesday Night

Rain likely, mainly before 11pm. Snow level 4800 feet lowering to 2400 feet after midnight . Mostly cloudy, with a low around 30.

Thursday

Sunny, with a high near 58.

Thursday Night

Clear, with a low around 31.

Friday

Sunny, with a high near 67.

Friday Night

Partly cloudy, with a low around 37.

Saturday

Mostly sunny, with a high near 72.