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

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

Lat: 37.881699°NLon: 121.914173°WElev: 3904.0ft.

37°F

3°C

Humidity	100%
Wind Speed	SSW 14 MPH
Barometer	NA
Dewpoint	37°F (3°C)
Visibility	NA
Wind Chill	28°F (-2°C)
Last update	12 Apr 08:20 AM PDT

More Information:

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

Extended Forecast for

4 Miles S Clayton CA

Today
High: 42 °F
Showers and
Breezy
Tonight
Low: 42 °F
Chance
Showers then
Partly Cloudy
Monday
High: 52 °F
Mostly Sunny
Monday Night
Low: 45 °F
Mostly Clear
Tuesday
High: 54 °F
Sunny
Tuesday Night
Low: 46 °F
Mostly Clear
Wednesday
High: 56 °F
Mostly Sunny
Wednesday Night
Low: 47 °F
Partly Cloudy
Thursday
High: 57 °F
Sunny

Detailed Forecast

Today

Showers and possibly a thunderstorm, mainly before 4pm, then a chance of showers and thunderstorms after 4pm. Steady temperature around 42. Breezy, with a south southwest wind 18 to 24 mph, with gusts as high as 45 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Tonight

A 30 percent chance of showers between 10pm and 11pm. Partly cloudy, with a low around 42. West southwest wind 6 to 15 mph, with gusts as high as 28 mph. New precipitation amounts of less than a tenth of an inch possible.

Monday

Mostly sunny, with a high near 52. Northwest wind 6 to 10 mph, with gusts as high as 20 mph.

Monday Night

Mostly clear, with a low around 45. Southwest wind 11 to 13 mph, with gusts as high as 23 mph.

Tuesday

Sunny, with a high near 54. Southwest wind 10 to 13 mph, with gusts as high as 22 mph.

Tuesday Night

Mostly clear, with a low around 46.

Wednesday

Mostly sunny, with a high near 56.

Wednesday Night

Partly cloudy, with a low around 47.