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

Gusty winds and dry conditions will continue to bring fire weather concerns to the southern Plains through Friday. Severe thunderstorms including a few tornadoes, large hail and damaging wind gusts are expected across parts of the Midwest and lower Ohio Valley today. A Pacific storm will bring low elevation rain and thunderstorms across southern California and heavy snow through the Sierra. 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 11:50 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

This Afternoon
High: 37 °F
Slight Chance
Snow and
Breezy
Tonight
Low: 31 °F
Mostly Clear
Friday
High: 42 °F
Mostly Sunny
Friday Night
Low: 35 °F
Partly Cloudy
Saturday
High: 51 °F
Mostly Sunny
Saturday Night
Low: 46 °F
Slight Chance
Rain
Sunday
High: 58 °F
Chance Rain
Sunday Night
Low: 50 °F
Chance Rain
Monday
High: 60 °F
Chance Rain

Detailed Forecast

This Afternoon

A 20 percent chance of snow before 2pm. Mostly sunny, with a steady temperature around 37. Breezy, with a west northwest wind 25 to 29 mph, with gusts as high as 46 mph.

Tonight

Mostly clear, with a low around 31. West northwest wind 8 to 17 mph, with gusts as high as 31 mph.

Friday

Mostly sunny, with a high near 42. South southeast wind around 6 mph becoming west southwest in the afternoon.

Friday Night

Partly cloudy, with a low around 35. Southeast wind 7 to 9 mph.

Saturday

Mostly sunny, with a high near 51. South southeast wind 13 to 15 mph, with gusts as high as 28 mph.

Saturday Night

A 20 percent chance of rain after 10pm. Partly cloudy, with a low around 46. New precipitation amounts of less than a tenth of an inch possible.

Sunday

A 40 percent chance of rain. Partly sunny, with a high near 58.