Critical Fire Weather in the High Plains and Midwest; Heavy Snow in the Western Mountains and Northern Plains

Gusty winds and low relative humidity will bring critical fire weather to the central/southern High Plains and portions of the Midwest. Two Pacific storms will continue to bring heavy mountain snow and gusty winds to the western U.S. through Thursday. A swath of wintry weather, including heavy snow and a wintry mix, is expected from the Northern Plains to New England. Read More >

Hazardous Weather Conditions

Cold Weather Advisory in effect from February 18, 12:00 AM PST until February 18, 09:00 AM PST

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

34°F

1°C

Humidity	93%
Wind Speed	N 5 MPH
Barometer	29.88 in (1011.85 mb)
Dewpoint	32°F (0°C)
Visibility	10.00 mi
Wind Chill	29°F (-2°C)
Last update	18 Feb 05:00 AM PST

More Information:

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

Extended Forecast for

3 Miles NNW Lake Berryessa CA

Cold Weather Advisory until February 18, 09:00am

Click here for hazard details and duration

Cold Weather Advisory

Cold Weather Advisory until February 18, 09:00am
NOW until 9:00am Wed
Cold Weather Advisory
Overnight
Low: 29 °F
Frost and
Patchy Fog
Wednesday
High: 52 °F
Slight Chance
Rain/Snow and
Patchy Fog
then Chance
Rain
Wednesday Night
Low: 36 °F
Rain Likely
then Rain and
Patchy Fog
Thursday
High: 51 °F
Rain/Snow and
Patchy Fog
then Chance
Rain
Thursday Night
Low: 26 °F
Patchy Frost
then Frost
and Patchy
Fog
Friday
High: 51 °F
Frost and
Areas Fog
then Partly
Sunny
Friday Night
Low: 32 °F
Slight Chance
Rain and
Patchy Fog
Saturday
High: 53 °F
Rain Likely
and Areas Fog

Detailed Forecast

Overnight

Patchy fog. Widespread frost. Otherwise, partly cloudy, with a low around 29. West northwest wind around 5 mph.

Wednesday

A slight chance of rain and snow before noon, then a chance of rain between noon and 4pm. Patchy fog before 10am. Widespread frost before 8am. Otherwise, mostly sunny, with a high near 52. Calm wind becoming west 5 to 8 mph in the afternoon. Chance of precipitation is 40%. Little or no snow accumulation expected.

Wednesday Night

Rain, mainly after 11pm. Patchy fog between 4am and 5am. Low around 36. South southeast wind 6 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Thursday

Rain and snow before 10am, then a chance of rain. Patchy fog before 7am. High near 51. West northwest wind 7 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

Thursday Night

Patchy fog after 4am. Widespread frost, mainly after 1am. Otherwise, mostly clear, with a low around 26. West wind 5 to 7 mph becoming calm in the evening.

Friday

Areas of fog before 9am. Widespread frost, mainly before 10am. Otherwise, mostly sunny, with a high near 51.

Friday Night

A 20 percent chance of rain after 10pm. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 32.

Saturday

Rain likely, mainly after 4pm. Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 53.

Saturday Night

Rain likely. Mostly cloudy, with a low around 41.

Sunday

Rain. Cloudy, with a high near 58.

Sunday Night

Rain. Cloudy, with a low around 48.