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 14 MPH
Barometer	NA
Dewpoint	37°F (3°C)
Visibility	NA
Wind Chill	28°F (-2°C)
Last update	12 Apr 08:20 AM PDT

More Information:

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

Extended Forecast for

4 Miles ENE Danville CA

Today
High: 56 °F
Showers
Tonight
Low: 42 °F
Chance
Showers then
Patchy Fog
Monday
High: 62 °F
Patchy Fog
then Sunny
Monday Night
Low: 43 °F
Mostly Clear
Tuesday
High: 64 °F
Sunny
Tuesday Night
Low: 42 °F
Mostly Clear
Wednesday
High: 66 °F
Partly Sunny
Wednesday Night
Low: 44 °F
Partly Cloudy
Thursday
High: 67 °F
Sunny

Detailed Forecast

Today

Showers and possibly a thunderstorm, mainly before 4pm, then a chance of showers and thunderstorms after 4pm. High near 56. South southwest wind 14 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Tonight

A 30 percent chance of showers between 10pm and 11pm. Patchy fog after 5am. Otherwise, partly cloudy, with a low around 42. West southwest wind 5 to 10 mph becoming light southwest after midnight. Winds could gust as high as 21 mph.

Monday

Patchy fog before 8am. Otherwise, mostly sunny, with a high near 62. Calm wind becoming west northwest 5 to 8 mph in the afternoon.

Monday Night

Mostly clear, with a low around 43. Southwest wind around 8 mph.

Tuesday

Sunny, with a high near 64. Southwest wind 7 to 9 mph, with gusts as high as 20 mph.

Tuesday Night

Mostly clear, with a low around 42.

Wednesday

Partly sunny, with a high near 66.

Wednesday Night

Partly cloudy, with a low around 44.