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

16 Miles NE Happy Camp CA

Winter Weather Advisory April 12, 06:55am until April 12, 11:00am

Click here for hazard details and duration

...

Winter Weather Advisory April 12, 06:55am until April 12, 11:00am
NOW until 11:00am Sun
Winter Weather Advisory
Today
High: 48 °F
Chance
Showers then
Showers
Tonight
Low: 38 °F
Rain/Snow
Likely then
Chance
Rain/Snow
Monday
High: 46 °F
Rain/Snow
Likely then
Rain Likely
Monday Night
Low: 39 °F
Chance Rain
then Mostly
Cloudy
Tuesday
High: 52 °F
Partly Sunny
Tuesday Night
Low: 40 °F
Rain Likely
Wednesday
High: 42 °F
Rain
Wednesday Night
Low: 29 °F
Rain/Snow
Likely then
Slight Chance
Snow

Detailed Forecast

Today

Rain and thunderstorms likely before 3pm, then showers and possibly a thunderstorm between 3pm and 5pm, then rain likely and possibly a thunderstorm after 5pm. Snow level 3800 feet rising to 5300 feet in the afternoon. High near 48. South wind around 5 mph becoming light and variable. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight

Rain and snow likely before 1am, then a chance of rain between 1am and 3am, then a chance of rain and snow after 3am. Snow level 4600 feet. Mostly cloudy, with a low around 38. South southwest wind 3 to 5 mph. Winds could gust as high as 20 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

Monday

A chance of rain and snow before 11am, then rain likely. Snow level 4400 feet rising to 5300 feet in the afternoon. Mostly cloudy, with a high near 46. South southwest wind around 5 mph becoming calm. Winds could gust as high as 21 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

Monday Night

A 30 percent chance of rain before 11pm. Snow level 5600 feet lowering to 4600 feet after midnight . Mostly cloudy, with a low around 39. Light and variable wind becoming northwest around 6 mph. Winds could gust as high as 20 mph.

Tuesday

Partly sunny, with a high near 52. Light west wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 21 mph.

Tuesday Night

Rain likely, mainly after 11pm. Snow level 5500 feet lowering to 4200 feet. Mostly cloudy, with a low around 40. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

Wednesday

Rain. Snow level 4400 feet rising to 5100 feet. High near 42. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Wednesday Night

Rain likely before 8pm, then rain and snow likely between 8pm and 11pm, then a slight chance of snow after 11pm. Snow level 4700 feet lowering to 3000 feet after midnight . Mostly cloudy, with a low around 29.

Thursday

Sunny, with a high near 46.

Thursday Night

Mostly clear, with a low around 31.

Friday

Sunny, with a high near 56.

Friday Night

Partly cloudy, with a low around 38.

Saturday

Mostly sunny, with a high near 61.