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

36°F

2°C

Humidity	93%
Wind Speed	N 0 MPH
Barometer	29.96 in (1014.56 mb)
Dewpoint	34°F (1°C)
Visibility	10.00 mi
Last update	20 Feb 12:30 AM PST

More Information:

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

Extended Forecast for

4 Miles NNW Napa 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: 30 °F
Frost and
Patchy Fog
Friday
High: 51 °F
Frost and
Patchy Fog
then Partly
Sunny
Friday Night
Low: 34 °F
Patchy Fog
then Patchy
Frost and
Areas Fog
Saturday
High: 56 °F
Patchy Fog
then Slight
Chance Rain
Saturday Night
Low: 45 °F
Rain Likely
Sunday
High: 60 °F
Rain Likely
Sunday Night
Low: 49 °F
Chance Rain
and Patchy
Fog
Monday
High: 62 °F
Chance Rain
and Patchy
Fog
Monday Night
Low: 52 °F
Rain Likely

Detailed Forecast

Overnight

Patchy fog after 3am. Widespread frost, mainly after 2am. Otherwise, mostly clear, with a low around 30. Calm wind.

Friday

Patchy fog before 8am. Widespread frost before 9am. Otherwise, partly sunny, with a high near 51. Light and variable wind.

Friday Night

Patchy fog after 10pm. Patchy frost after midnight. Otherwise, increasing clouds, with a low around 34. Calm wind.

Saturday

A 10 percent chance of rain after 4pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 56. Calm wind becoming southeast 5 to 7 mph in the afternoon.

Saturday Night

Rain likely, mainly after 4am. Mostly cloudy, with a low around 45. Southeast wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Sunday

Rain likely, mainly before 10am. Mostly cloudy, with a high near 60. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Sunday Night

A 40 percent chance of rain. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 49.

Monday

A chance of rain. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 62.

Monday Night

Rain likely. Cloudy, with a low around 52.

Tuesday

Rain. Cloudy, with a high near 60.

Tuesday Night

Rain likely. Patchy fog. Otherwise, cloudy, with a low around 48.

Wednesday

Rain likely. Patchy fog. Otherwise, cloudy, with a high near 62.