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.

32°F

0°C

Humidity	100%
Wind Speed	N 0 MPH
Barometer	NA
Dewpoint	32°F (0°C)
Visibility	NA
Last update	19 Feb 06:05 PM PST

More Information:

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

Extended Forecast for

6 Miles NE San Ramon 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: 32 °F
Clear then
Frost
Friday
High: 46 °F
Frost then
Partly Sunny
Friday Night
Low: 36 °F
Patchy Frost
Saturday
High: 53 °F
Mostly Sunny
Saturday Night
Low: 45 °F
Slight Chance
Rain
Sunday
High: 61 °F
Chance Rain
Sunday Night
Low: 50 °F
Chance Rain
Monday
High: 61 °F
Chance Rain
Monday Night
Low: 54 °F
Rain

Detailed Forecast

Tonight

Widespread frost after 3am. Otherwise, mostly clear, with a low around 32. West northwest wind 15 to 20 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 32 mph.

Friday

Widespread frost before 8am. Otherwise, mostly sunny, with a high near 46. Southeast wind around 6 mph becoming south southwest in the afternoon.

Friday Night

Patchy frost between 11pm and 1am. Otherwise, partly cloudy, with a low around 36. Southeast wind 7 to 9 mph.

Saturday

Mostly sunny, with a high near 53. South wind around 15 mph, with gusts as high as 26 mph.

Saturday Night

A 20 percent chance of rain after 10pm. Partly cloudy, with a low around 45. South southeast wind 15 to 18 mph, with gusts as high as 29 mph. New precipitation amounts of less than a tenth of an inch possible.

Sunday

A 30 percent chance of rain. Partly sunny, with a high near 61. 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 54.

Tuesday

Rain. Mostly cloudy, with a high near 56.

Tuesday Night

Rain. Cloudy, with a low around 51.