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

3 Miles ESE Danville CA

Today
High: 63 °F
Showers
Tonight
Low: 44 °F
Showers
Sunday
High: 58 °F
Showers
Sunday Night
Low: 42 °F
Chance Rain
then Patchy
Fog
Monday
High: 63 °F
Patchy Fog
then Mostly
Sunny
Monday Night
Low: 41 °F
Mostly Clear
Tuesday
High: 66 °F
Sunny
Tuesday Night
Low: 40 °F
Mostly Clear
Wednesday
High: 67 °F
Sunny

Detailed Forecast

Today

Rain and thunderstorms likely, then showers and possibly a thunderstorm after 4pm. High near 63. South wind 5 to 10 mph increasing to 11 to 16 mph in the afternoon. Winds could gust as high as 30 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 44. South wind 7 to 13 mph, with gusts as high as 29 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 58. South southwest wind 9 to 13 mph, with gusts as high as 24 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. Patchy fog after 2am. Otherwise, partly cloudy, with a low around 42. West southwest wind 5 to 10 mph becoming light south southwest in the evening. Winds could gust as high as 21 mph. New precipitation amounts of less than a tenth of an inch possible.

Monday

Patchy fog before 9am. Otherwise, mostly sunny, with a high near 63. Calm wind becoming west northwest around 6 mph in the afternoon.

Monday Night

Mostly clear, with a low around 41.

Tuesday

Sunny, with a high near 66.

Tuesday Night

Mostly clear, with a low around 40.

Wednesday

Sunny, with a high near 67.

Wednesday Night

Partly cloudy, with a low around 42.