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

3 Miles S Clayton CA

Today
High: 58 °F
Showers
Tonight
Low: 50 °F
Showers
Likely
Saturday
High: 56 °F
Showers
Saturday Night
Low: 48 °F
Showers
Sunday
High: 52 °F
Showers
Sunday Night
Low: 46 °F
Chance Rain
then Partly
Cloudy
Monday
High: 57 °F
Mostly Sunny
Monday Night
Low: 47 °F
Mostly Clear
Tuesday
High: 60 °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 58. South southwest wind 8 to 14 mph, with gusts as high as 25 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 11pm, then a chance of rain after 11pm. Mostly cloudy, with a low around 50. South southwest wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday

Rain likely, then showers and possibly a thunderstorm after 11am. High near 56. South wind 11 to 20 mph, with gusts as high as 36 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Saturday Night

Showers and possibly a thunderstorm before 2am, then rain after 2am. Low around 48. South wind 14 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Sunday

Rain before 11am, then showers and possibly a thunderstorm after 11am. High near 52. Southwest wind 14 to 16 mph, with gusts as high as 32 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. Partly 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 57.

Monday Night

Mostly clear, with a low around 47.

Tuesday

Sunny, with a high near 60.

Tuesday Night

Mostly clear, with a low around 47.

Wednesday

Sunny, with a high near 64.