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

4 Miles SSE 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: 40 °F⇓
Breezy.
Rain/Snow
then Chance
Snow
Tonight
Low: 31 °F
Mostly Clear
Friday
High: 44 °F
Partly Sunny
Friday Night
Low: 37 °F
Partly Cloudy
Saturday
High: 51 °F
Partly Sunny
Saturday Night
Low: 45 °F
Slight Chance
Rain
Sunday
High: 56 °F
Chance Rain
Sunday Night
Low: 50 °F
Chance Rain
Monday
High: 58 °F
Rain Likely

Detailed Forecast

Today

Rain and snow before 1pm, then a slight chance of snow between 1pm and 2pm. Temperature falling to around 35 by 9am. Breezy, with a south southwest wind 25 to 28 mph becoming west northwest in the morning. Winds could gust as high as 49 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

Tonight

Mostly clear, with a low around 31. West northwest wind 9 to 18 mph, with gusts as high as 33 mph.

Friday

Partly sunny, with a high near 44. Southeast wind 5 to 7 mph becoming light and variable in the afternoon.

Friday Night

Partly cloudy, with a low around 37. East southeast wind 6 to 9 mph.

Saturday

Partly sunny, with a high near 51. South southeast wind 13 to 15 mph, with gusts as high as 26 mph.

Saturday Night

A 20 percent chance of rain after 10pm. Mostly cloudy, with a low around 45.

Sunday

A 40 percent chance of rain. Partly sunny, with a high near 56.