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.

45°F

7°C

Humidity	98%
Wind Speed	S 8 MPH
Barometer	NA
Dewpoint	44°F (7°C)
Visibility	NA
Wind Chill	41°F (5°C)
Last update	10 Apr 10:00 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: 49 °F
Showers
Likely then
Chance Rain
Saturday
High: 48 °F
Showers and
Breezy
Saturday Night
Low: 45 °F
Showers and
Breezy
Sunday
High: 48 °F
Showers and
Breezy
Sunday Night
Low: 46 °F
Chance Rain
then Partly
Cloudy
Monday
High: 54 °F
Mostly Sunny
Monday Night
Low: 46 °F
Mostly Clear
Tuesday
High: 57 °F
Sunny

Detailed Forecast

Today

Showers and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. High near 53. South southwest wind 10 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Tonight

Rain and thunderstorms likely before 3am, then a slight chance of rain between 3am and 4am. Mostly cloudy, with a steady temperature around 49. South southwest wind around 14 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Saturday

Rain and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Steady temperature around 48. Breezy, with a south wind 15 to 23 mph, with gusts as high as 38 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Saturday Night

Showers and possibly a thunderstorm before 5am, then rain after 5am. Low around 45. Breezy, with a south southwest wind 18 to 23 mph, with gusts as high as 39 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Sunday

Rain before 8am, then showers and possibly a thunderstorm after 8am. High near 48. Breezy, with a south southwest wind 18 to 22 mph, with gusts as high as 41 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Sunday Night

A 40 percent chance of rain before 11pm. Mostly cloudy, with a low around 46. New precipitation amounts of less than a tenth of an inch possible.

Monday

Mostly sunny, with a high near 54.

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 58.