Tracking Areas of Fire Weather, Winter Weather, and Severe Weather Thursday

Continuation of gusty winds and low relative humidity will bring additional periods of critical fire weather to the southern Plains Thursday and Friday. Another Pacific storm will continue gusty winds and heavy snow over the western mountains into Thursday. Severe thunderstorms are possible across parts of the middle Mississippi into lower Ohio Valleys Thursday afternoon into early evening. Read More >

Hazardous Weather Conditions

Extreme Cold Warning in effect from February 20, 01:00 AM PST until February 20, 09:00 AM PST

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

32°F

0°C

Humidity	100%
Wind Speed	N 0 MPH
Barometer	NA
Dewpoint	32°F (0°C)
Visibility	NA
Last update	19 Feb 06:20 AM PST

More Information:

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

Extended Forecast for

Clayton CA

Extreme Cold Warning February 20, 01:00am until February 20, 09:00am

Click here for hazard details and duration

Extreme Cold Warning

Today
High: 48 °F
Breezy. Rain
then Chance
Rain
Tonight
Low: 34 °F
Mostly Clear
then Patchy
Frost
Friday
High: 49 °F
Partly Sunny
Friday Night
Low: 37 °F
Partly Cloudy
Saturday
High: 55 °F
Partly Sunny
Saturday Night
Low: 46 °F
Slight Chance
Rain
Sunday
High: 61 °F
Chance Rain
Sunday Night
Low: 51 °F
Chance Rain
Monday
High: 62 °F
Rain Likely

Detailed Forecast

Today

Rain, mainly before 1pm. High near 48. Breezy, with a south wind 21 to 23 mph becoming west northwest in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

Tonight

Patchy frost after midnight. Otherwise, mostly clear, with a low around 34. West wind 6 to 14 mph becoming south southwest after midnight. Winds could gust as high as 25 mph.

Friday

Partly sunny, with a high near 49. Southeast wind around 5 mph becoming light and variable in the afternoon.

Friday Night

Partly cloudy, with a low around 37. East wind 3 to 6 mph.

Saturday

Partly sunny, with a high near 55. South southeast wind 8 to 11 mph, with gusts as high as 22 mph.

Saturday Night

A 20 percent chance of rain. Mostly cloudy, with a low around 46.

Sunday

A 40 percent chance of rain. Partly sunny, with a high near 61.

Sunday Night

A chance of rain. Mostly cloudy, with a low around 51.