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.

28°F

-2°C

Humidity	99%
Wind Speed	N 0 MPH
Barometer	NA
Dewpoint	27°F (-3°C)
Visibility	NA
Last update	20 Feb 12:05 AM PST

More Information:

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

Extended Forecast for

2 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

Overnight
Low: 35 °F
Patchy Frost
Friday
High: 51 °F
Areas Frost
then Partly
Sunny
Friday Night
Low: 38 °F
Partly Cloudy
Saturday
High: 58 °F
Mostly Sunny
Saturday Night
Low: 46 °F
Slight Chance
Rain
Sunday
High: 65 °F
Chance Rain
Sunday Night
Low: 51 °F
Chance Rain
Monday
High: 66 °F
Chance Rain
Monday Night
Low: 56 °F
Rain

Detailed Forecast

Overnight

Patchy frost after 2am. Otherwise, mostly clear, with a low around 35. Southwest wind 6 to 8 mph.

Friday

Areas of frost before 7am. Otherwise, mostly sunny, with a high near 51. South southeast wind around 5 mph becoming north in the afternoon.

Friday Night

Partly cloudy, with a low around 38. Southeast wind around 6 mph.

Saturday

Mostly sunny, with a high near 58. South southeast wind 9 to 11 mph, with gusts as high as 23 mph.

Saturday Night

A 20 percent chance of rain after 10pm. Partly cloudy, with a low around 46. South southeast wind around 14 mph, with gusts as high as 26 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 65. New precipitation amounts of less than a tenth of an inch possible.

Sunday Night

A 40 percent chance of rain. Mostly cloudy, with a low around 51.

Monday

A chance of rain. Mostly cloudy, with a high near 66.

Monday Night

Rain. Mostly cloudy, with a low around 56.

Tuesday

Rain. Mostly cloudy, with a high near 61.

Tuesday Night

Rain. Cloudy, with a low around 52.