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.

31°F

-1°C

Humidity	99%
Wind Speed	N 0 MPH
Barometer	NA
Dewpoint	31°F (-1°C)
Visibility	NA
Last update	19 Feb 08:10 AM PST

More Information:

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

Extended Forecast for

3 Miles S 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: 44 °F
Breezy.
Chance
Rain/Snow
then Chance
Rain
Tonight
Low: 32 °F
Mostly Clear
then Frost
Friday
High: 46 °F
Partly Sunny
Friday Night
Low: 37 °F
Partly Cloudy
Saturday
High: 53 °F
Partly Sunny
Saturday Night
Low: 45 °F
Slight Chance
Rain
Sunday
High: 58 °F
Chance Rain
Sunday Night
Low: 50 °F
Chance Rain
Monday
High: 60 °F
Rain Likely

Detailed Forecast

Today

A chance of rain and snow before noon, then a chance of rain between noon and 2pm. Mostly sunny, with a high near 44. Breezy, with a west northwest wind around 24 mph, with gusts as high as 44 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

Tonight

Widespread frost before 4am, then widespread frost after 5am. Otherwise, mostly clear, with a low around 32. West wind 8 to 16 mph, with gusts as high as 30 mph.

Friday

Partly sunny, with a high near 46. Southeast wind 5 to 7 mph becoming north northeast in the afternoon.

Friday Night

Partly cloudy, with a low around 37. East wind 6 to 8 mph.

Saturday

Partly sunny, with a high near 53. South southeast wind 10 to 13 mph, with gusts as high as 25 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 58.

Sunday Night

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