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

Continuation of gusty winds and low relative humidity will bring additional periods of critical fire weather to the southern Plains Thursday and Friday. Another Pacific storm will continue gusty winds and heavy snow over the western mountains into Thursday. Severe thunderstorms are possible across parts of the middle Mississippi into lower Ohio Valleys Thursday afternoon into early evening. 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	100%
Wind Speed	N 0 MPH
Barometer	NA
Dewpoint	31°F (-1°C)
Visibility	NA
Last update	18 Feb 11:20 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: 35 °F
Rain/Snow and
Breezy
Thursday
High: 40 °F⇓
Windy.
Rain/Snow
Likely then
Slight Chance
Snow
Thursday Night
Low: 33 °F
Slight Chance
Snow then
Mostly Clear
Friday
High: 45 °F
Partly Sunny
Friday Night
Low: 37 °F
Partly Cloudy
Saturday
High: 50 °F
Partly Sunny
then Chance
Rain
Saturday Night
Low: 46 °F
Rain Likely
and Breezy
Sunday
High: 55 °F
Rain and
Breezy
Sunday Night
Low: 53 °F
Rain and
Breezy

Detailed Forecast

Tonight

Rain, possibly mixed with snow, becoming all rain after 4am. Low around 35. Breezy, with a southeast wind 16 to 23 mph, with gusts as high as 39 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of less than a half inch possible.

Thursday

Rain and snow likely before 3pm, then a slight chance of snow after 4pm. Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 34 by 10am. Windy, with a west northwest wind 24 to 30 mph, with gusts as high as 46 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

Thursday Night

A 20 percent chance of snow before 10pm. Mostly clear, with a low around 33. West northwest wind 10 to 15 mph, with gusts as high as 31 mph.

Friday

Partly sunny, with a high near 45. Calm wind becoming east around 6 mph in the morning.

Friday Night

Partly cloudy, with a low around 37. East southeast wind 7 to 9 mph, with gusts as high as 18 mph.

Saturday

A 30 percent chance of rain after 4pm. Partly sunny, with a high near 50.

Saturday Night

Rain likely, mainly after 10pm. Mostly cloudy, with a low around 46. Breezy. Chance of precipitation is 60%.

Sunday

Rain. Mostly cloudy, with a high near 55. Breezy.