Hawaii and Guam Concerns; Record Warmth Spreads Eastward; Heavy Snow for Sierra-Nevada; Severe Weather for 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	97%
Wind Speed	S 7 MPH
Barometer	NA
Dewpoint	43°F (6°C)
Visibility	NA
Wind Chill	40°F (4°C)
Last update	10 Apr 05:45 AM PDT

More Information:

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

Extended Forecast for

7 Miles SSW Brentwood CA

Today
High: 66 °F
Showers
Tonight
Low: 54 °F
Showers
Likely
Saturday
High: 62 °F
Showers
Saturday Night
Low: 51 °F
Showers
Sunday
High: 56 °F
Showers
Sunday Night
Low: 49 °F
Chance
Showers
Monday
High: 61 °F
Mostly Sunny
Monday Night
Low: 48 °F
Mostly Clear
Tuesday
High: 65 °F
Sunny

Detailed Forecast

Today

Showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 4pm, then a chance of showers and thunderstorms after 4pm. High near 66. South southwest wind 5 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight

Showers likely and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms between 10pm and 11pm, then a chance of rain after 11pm. Mostly cloudy, with a low around 54. South wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday

A chance of rain, then showers and possibly a thunderstorm after 11am. High near 62. South southwest wind 8 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Saturday Night

Showers and possibly a thunderstorm before 11pm, then rain after 11pm. Low around 51. South wind 10 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

Sunday

Rain before 11am, then showers and possibly a thunderstorm between 11am and 5pm, then a chance of showers and thunderstorms after 5pm. High near 56. South southeast wind 10 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Sunday Night

A chance of showers and thunderstorms before 8pm, then a chance of rain, mainly between 8pm and 11pm. Mostly cloudy, with a low around 49. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Monday

Mostly sunny, with a high near 61.

Monday Night

Mostly clear, with a low around 48.

Tuesday

Sunny, with a high near 65.

Tuesday Night

Mostly clear, with a low around 49.

Wednesday

Sunny, with a high near 69.

Wednesday Night

Partly cloudy, with a low around 53.