Inclement Weather in the Pacific Northwest; Severe Thunderstorms in the Southeast; Impending Winter Storm

An approaching storm will bring rain and high elevation snow to Pacific Northwest through the weekend. Isolated severe thunderstorms are possible across parts of the Southeast today into this evening as a low strengthens over the Southeast. This system will form into a winter storm on Sunday that will bring heavy snow, high winds, and coastal flooding to the Mid-Atlantic and Northeast into Monday. Read More >

Hazardous Weather Conditions

Cold Weather Advisory until February 21, 09:00 AM PST

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

28°F

-2°C

Humidity	99%
Wind Speed	N 0 MPH
Barometer	NA
Dewpoint	28°F (-2°C)
Visibility	NA
Last update	20 Feb 03:25 AM PST

More Information:

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

Extended Forecast for

Clayton CA

Cold Weather Advisory February 21, 08:31am until February 21, 09:00am

Click here for hazard details and duration

...

Cold Weather Advisory February 21, 08:31am until February 21, 09:00am
NOW until 9:00am Sat
Cold Weather Advisory
Today
High: 55 °F
Decreasing
Clouds
Tonight
Low: 44 °F
Partly Cloudy
Sunday
High: 62 °F
Partly Sunny
Sunday Night
Low: 45 °F
Mostly Cloudy
Monday
High: 63 °F
Partly Sunny
then Slight
Chance Rain
Monday Night
Low: 53 °F
Rain Likely
Tuesday
High: 58 °F
Rain
Tuesday Night
Low: 53 °F
Rain

Detailed Forecast

Today

Mostly cloudy, then gradually becoming sunny, with a high near 55. South wind 6 to 13 mph, with gusts as high as 22 mph.

Tonight

Partly cloudy, with a low around 44. South wind around 11 mph, with gusts as high as 21 mph.

Sunday

Partly sunny, with a high near 62. South wind 7 to 9 mph.

Sunday Night

Mostly cloudy, with a low around 45. Northwest wind around 5 mph becoming light and variable in the evening.

Monday

A 10 percent chance of rain after 4pm. Partly sunny, with a high near 63. East northeast wind 3 to 6 mph.

Monday Night

Rain likely, mainly after 4am. Mostly cloudy, with a low around 53. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

Tuesday

Rain. High near 58. Chance of precipitation is 80%.

Tuesday Night

Rain, mainly before 10pm. Cloudy, with a low around 53.

Wednesday

A chance of rain. Mostly cloudy, with a high near 60.

Wednesday Night

A chance of rain. Mostly cloudy, with a low around 49.

Thursday

A slight chance of rain. Partly sunny, with a high near 63.

Thursday Night

A slight chance of rain. Mostly cloudy, with a low around 50.