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

Napa, Napa County Airport (KAPC)

Lat: 38.2075°NLon: 122.27944°WElev: 33.0ft.

Clear

45°F

7°C

Humidity	70%
Wind Speed	WNW 12 MPH
Barometer	29.86 in (1011.18 mb)
Dewpoint	35°F (2°C)
Visibility	10.00 mi
Wind Chill	39°F (4°C)
Last update	19 Feb 07:20 PM PST

More Information:

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

Extended Forecast for

Sonoma 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: 30 °F
Clear then
Frost and
Patchy Fog
Friday
High: 51 °F
Frost and
Patchy Fog
then Partly
Sunny
Friday Night
Low: 33 °F
Patchy Fog
then Patchy
Frost and
Patchy Fog
Saturday
High: 54 °F
Slight Chance
Rain
Saturday Night
Low: 45 °F
Chance Rain
Sunday
High: 59 °F
Rain Likely
Sunday Night
Low: 49 °F
Chance Rain
Monday
High: 62 °F
Rain Likely
Monday Night
Low: 50 °F
Rain

Detailed Forecast

Tonight

Patchy fog after 5am. Widespread frost, mainly after 3am. Otherwise, mostly clear, with a low around 30. West northwest wind 5 to 7 mph becoming calm in the evening.

Friday

Patchy fog before 9am. Widespread frost before 9am. Otherwise, mostly sunny, with a high near 51. Calm wind becoming southeast around 5 mph.

Friday Night

Patchy fog after 10pm. Patchy frost after midnight. Otherwise, partly cloudy, with a low around 33. Calm wind.

Saturday

A 20 percent chance of rain after 10am. Mostly cloudy, with a high near 54. Calm wind becoming southeast 5 to 8 mph in the morning.

Saturday Night

A 50 percent chance of rain. Mostly cloudy, with a low around 45. Southeast wind around 8 mph, with gusts as high as 18 mph. New precipitation amounts between a tenth and quarter of an inch possible.

Sunday

Rain likely. Mostly cloudy, with a high near 59. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Sunday Night

A 50 percent chance of rain. Cloudy, with a low around 49.

Monday

Rain likely, mainly after 4pm. Mostly cloudy, with a high near 62.

Monday Night

Rain. Cloudy, with a low around 50.

Tuesday

Rain. Cloudy, with a high near 59.

Tuesday Night

Rain likely. Patchy fog. Otherwise, cloudy, with a low around 46.

Wednesday

Rain likely. Patchy fog. Otherwise, mostly cloudy, with a high near 61.