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.

44°F

7°C

Humidity	99%
Wind Speed	SSW 9 MPH
Barometer	NA
Dewpoint	44°F (7°C)
Visibility	NA
Wind Chill	39°F (4°C)
Last update	11 Apr 01:10 AM PDT

More Information:

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

Extended Forecast for

4 Miles SSE Clayton CA

Today
High: 49 °F
Showers
Likely and
Breezy
Tonight
Low: 41 °F
Breezy.
Showers then
Showers
Likely
Sunday
High: 44 °F
Showers and
Breezy
Sunday Night
Low: 43 °F
Chance
Showers then
Partly Cloudy
Monday
High: 53 °F
Mostly Sunny
Monday Night
Low: 46 °F
Mostly Clear
Tuesday
High: 57 °F
Sunny
Tuesday Night
Low: 46 °F
Mostly Clear
Wednesday
High: 57 °F
Sunny

Detailed Forecast

Today

Showers and thunderstorms likely, mainly before 2pm. Mostly cloudy, with a high near 49. Breezy, with a south wind 21 to 24 mph, with gusts as high as 40 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight

Showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then a chance of showers and thunderstorms after 4am. Low around 41. Breezy, with a south southwest wind 18 to 22 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

Sunday

Showers and possibly a thunderstorm, mainly before 4pm, then a chance of showers and thunderstorms after 4pm. Steady temperature around 44. 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.

Sunday Night

A 30 percent chance of showers before 11pm. Partly cloudy, with a low around 43. West southwest wind 8 to 17 mph, with gusts as high as 31 mph. New precipitation amounts of less than a tenth of an inch possible.

Monday

Mostly sunny, with a high near 53. West northwest wind 6 to 8 mph.

Monday Night

Mostly clear, with a low around 46.

Tuesday

Sunny, with a high near 57.

Tuesday Night

Mostly clear, with a low around 46.

Wednesday

Sunny, with a high near 57.

Wednesday Night

Partly cloudy, with a low around 48.