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.

37°F

3°C

Humidity	100%
Wind Speed	SSW 15 MPH
Barometer	NA
Dewpoint	37°F (3°C)
Visibility	NA
Wind Chill	28°F (-2°C)
Last update	11 Apr 10:55 PM PDT

More Information:

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

Extended Forecast for

3 Miles S Clayton CA

Tonight
Low: 45 °F
Chance
Showers
Sunday
High: 48 °F
Showers
Sunday Night
Low: 44 °F
Chance
Showers then
Partly Cloudy
Monday
High: 57 °F
Mostly Sunny
Monday Night
Low: 47 °F
Mostly Clear
Tuesday
High: 59 °F
Sunny
Tuesday Night
Low: 46 °F
Mostly Clear
Wednesday
High: 59 °F
Mostly Sunny
Wednesday Night
Low: 49 °F
Partly Cloudy

Detailed Forecast

Tonight

A chance of showers and thunderstorms. Mostly cloudy, with a low around 45. South southwest wind 16 to 18 mph, with gusts as high as 36 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.

Sunday

Showers and possibly a thunderstorm, mainly before 4pm, then a chance of showers and thunderstorms after 4pm. Steady temperature around 48. Southwest wind 17 to 21 mph, with gusts as high as 40 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

Sunday Night

A 40 percent chance of showers, mainly before 8pm. Partly cloudy, with a low around 44. West southwest wind 6 to 14 mph, with gusts as high as 25 mph. New precipitation amounts of less than a tenth of an inch possible.

Monday

Mostly sunny, with a high near 57. West northwest wind 6 to 8 mph.

Monday Night

Mostly clear, with a low around 47. Southwest wind around 10 mph, with gusts as high as 21 mph.

Tuesday

Sunny, with a high near 59.

Tuesday Night

Mostly clear, with a low around 46.

Wednesday

Mostly sunny, with a high near 59.

Wednesday Night

Partly cloudy, with a low around 49.