Heavy Rain in the Southern U.S.; Active Weather Continues in Alaska

A storm system will bring heavy rainfall, thunderstorms, and flooding threats to portions of the Southern Plains today, the Lower Mississippi Valley Saturday, and the Southeast into the Mid-Atlantic on Sunday. Another Bering system will impact the Alaskan West Coast and Central Interior through the weekend bringing moderate to heavy snow, high winds, and/or some blizzard conditions. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

Lat: 37.881699°NLon: 121.914173°WElev: 3904.0ft.

39°F

4°C

Humidity	99%
Wind Speed	SSE 14 MPH
Barometer	NA
Dewpoint	38°F (3°C)
Visibility	NA
Wind Chill	31°F (-1°C)
Last update	15 Feb 06:50 AM PST

More Information:

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

Extended Forecast for

4 Miles S Clayton CA

Today
High: 51 °F
Chance Rain
then Rain
Tonight
Low: 47 °F
Rain
Washington's Birthday
High: 46 °F⇓
Rain
Monday Night
Low: 44 °F
Rain then
Rain/Snow
Tuesday
High: 49 °F
Breezy.
Rain/Snow
then Showers
Tuesday Night
Low: 39 °F
Rain/Snow and
Breezy then
Snow Likely
Wednesday
High: 45 °F
Snow Likely
Wednesday Night
Low: 41 °F
Snow Likely
Thursday
High: 46 °F
Rain/Snow
Likely

Detailed Forecast

Today

Rain, mainly after 1pm. High near 51. South wind 16 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

Tonight

Rain. Steady temperature around 47. Southwest wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

Washington's Birthday

Rain. Temperature falling to around 39 by 3pm. East wind around 15 mph becoming northwest in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

Monday Night

Rain before 1am, then rain, possibly mixed with snow. Low around 44. West southwest wind 18 to 20 mph, with gusts as high as 46 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

Tuesday

Rain, possibly mixed with snow, becoming all rain after 10am. Some thunder is also possible. High near 49. Breezy, with a south southwest wind 24 to 28 mph, with gusts as high as 50 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

Tuesday Night

Rain and snow, becoming all snow after 10pm. Some thunder is also possible. Low around 39. Breezy. Chance of precipitation is 90%. Little or no snow accumulation expected.

Wednesday

Snow likely, mainly after 10am. Mostly cloudy, with a high near 45. Chance of precipitation is 70%. Little or no snow accumulation expected.

Wednesday Night

Snow likely. Mostly cloudy, with a low around 41.

Thursday

Snow likely before 10am, then a chance of rain and snow. Partly sunny, with a high near 46.

Thursday Night

A chance of rain and snow before 1am, then a chance of snow. Mostly cloudy, with a low around 39.

Friday

A chance of rain and snow. Partly sunny, with a high near 47.

Friday Night

A chance of rain and snow. Mostly cloudy, with a low around 41.