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 08:50 PM PST

More Information:

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

Extended Forecast for

3 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: 33 °F
Clear then
Areas Frost
Friday
High: 46 °F
Mostly Sunny
Friday Night
Low: 36 °F
Partly Cloudy
Saturday
High: 52 °F
Mostly Sunny
Saturday Night
Low: 45 °F
Slight Chance
Rain
Sunday
High: 60 °F
Chance Rain
Sunday Night
Low: 50 °F
Chance Rain
Monday
High: 61 °F
Chance Rain
Monday Night
Low: 55 °F
Rain

Detailed Forecast

Tonight

Areas of frost after 2am. Otherwise, mostly clear, with a low around 33. West wind 7 to 13 mph, with gusts as high as 23 mph.

Friday

Mostly sunny, with a high near 46. South southeast wind around 6 mph becoming north northeast in the afternoon.

Friday Night

Partly cloudy, with a low around 36. Southeast wind 6 to 8 mph.

Saturday

Mostly sunny, with a high near 52. South southeast wind 9 to 11 mph, with gusts as high as 24 mph.

Saturday Night

A 20 percent chance of rain after 10pm. Partly cloudy, with a low around 45. South southeast wind around 15 mph, with gusts as high as 28 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 60. 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 61.

Monday Night

Rain. Mostly cloudy, with a low around 55.

Tuesday

Rain. Mostly cloudy, with a high near 56.

Tuesday Night

Rain. Mostly cloudy, with a low around 52.