Critical Fire Weather in the Southern High Plains; Heavy Snow in the Great Lakes and Northeast U.S.

Gusty winds and low relative humidity will bring critical fire weather to the southern High Plains Friday. A winter storm will track across the Great Lakes and Northeast U.S. Friday into Saturday with areas of wintry mix and heavy snow from northern New York through southern Maine. 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.

30°F

-1°C

Humidity	100%
Wind Speed	N 0 MPH
Barometer	NA
Dewpoint	30°F (-1°C)
Visibility	NA
Last update	19 Feb 07:50 PM 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

Tonight
Low: 31 °F
Mostly Clear
Friday
High: 42 °F
Mostly Sunny
Friday Night
Low: 38 °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
Monday Night
Low: 54 °F
Rain

Detailed Forecast

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 steady temperature around 38. 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. South southeast wind around 18 mph, with gusts as high as 34 mph. 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. New precipitation amounts of less than a tenth of an inch possible.

Sunday Night

A 30 percent chance of rain. Mostly cloudy, with a low around 50.

Monday

A chance of rain. Partly sunny, with a high near 60.

Monday Night

Rain. Mostly cloudy, with a low around 54.

Tuesday

Rain. Mostly cloudy, with a high near 57.

Tuesday Night

Rain. Cloudy, with a low around 52.