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: 53 °F
Showers
Tonight
Low: 47 °F
Showers and
Breezy
Sunday
High: 51 °F
Showers
Sunday Night
Low: 47 °F
Chance Rain
then Mostly
Clear
Monday
High: 56 °F
Mostly Sunny
Monday Night
Low: 47 °F
Mostly Clear
Tuesday
High: 59 °F
Sunny
Tuesday Night
Low: 47 °F
Mostly Clear
Wednesday
High: 60 °F
Sunny

Detailed Forecast

Today

Rain and thunderstorms likely, then showers and possibly a thunderstorm after 4pm. Steady temperature around 53. South wind 13 to 20 mph, with gusts as high as 34 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight

Showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 5am, then rain after 5am. Low around 47. Breezy, with a south southwest wind 16 to 22 mph, with gusts as high as 38 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

Sunday

Rain before 8am, then showers and possibly a thunderstorm after 8am. High near 51. South southwest wind 16 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Sunday Night

A 30 percent chance of rain before 11pm. Partly cloudy, with a low around 47. West southwest wind 7 to 14 mph, with gusts as high as 26 mph. New precipitation amounts of less than a tenth of an inch possible.

Monday

Mostly sunny, with a high near 56. Southwest wind around 7 mph becoming west northwest in the morning.

Monday Night

Mostly clear, with a low around 47.

Tuesday

Sunny, with a high near 59.

Tuesday Night

Mostly clear, with a low around 47.

Wednesday

Sunny, with a high near 60.

Wednesday Night

Partly cloudy, with a low around 48.