Heavy Lake Effect Snow; Subfreezing Temperatures in the Eastern U.S.

A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. The Arctic front will continue to bring increasing winds to the Northeast that will remain gusty. Subfreezing overnight low temperatures will be found as far south as the Gulf Coast. Read More >

Hazardous Weather Conditions

Cold Weather Advisory in effect from December 30, 01:00 AM PST until December 30, 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	100%
Wind Speed	N 5 MPH
Barometer	30.25 in (1024.38 mb)
Dewpoint	36°F (2°C)
Visibility	9.00 mi
Wind Chill	32°F (0°C)
Last update	30 Dec 12:00 AM PST

More Information:

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

Extended Forecast for

6 Miles SE Lake Berryessa CA

Cold Weather Advisory December 30, 01:00am until December 30, 09:00am

Click here for hazard details and duration

Cold Weather Advisory

Overnight
Low: 37 °F
Clear
Tuesday
High: 54 °F
Mostly Sunny
Tuesday Night
Low: 47 °F
Mostly Cloudy
then Slight
Chance Rain
Wednesday
High: 51 °F
Chance Rain
Wednesday Night
Low: 46 °F
Rain and
Patchy Fog
New Year's Day
High: 53 °F
Rain and
Areas Fog
Thursday Night
Low: 50 °F
Rain and
Patchy Fog
Friday
High: 55 °F
Rain and
Patchy Fog
Friday Night
Low: 46 °F
Rain

Detailed Forecast

Overnight

Clear, with a low around 37. Light north northeast wind.

Tuesday

Mostly sunny, with a high near 54. East wind 5 to 7 mph.

Tuesday Night

A 10 percent chance of rain after 4am. Mostly cloudy, with a steady temperature around 47. Calm wind becoming north around 5 mph after midnight.

Wednesday

A 40 percent chance of rain, mainly after 10am. Cloudy, with a high near 51. Calm wind becoming east around 5 mph in the morning. New precipitation amounts of less than a tenth of an inch possible.

Wednesday Night

Rain. Patchy fog. Low around 46. East southeast wind 5 to 8 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

New Year's Day

Rain. Areas of fog before 10am. High near 53. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Thursday Night

Rain. Patchy fog. Low around 50. Chance of precipitation is 80%.

Friday

Rain. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 55.

Friday Night

Rain. Cloudy, with a low around 46.

Saturday

Rain likely. Mostly cloudy, with a high near 53.

Saturday Night

Rain likely. Patchy fog. Otherwise, mostly cloudy, with a low around 43.

Sunday

Rain likely. Patchy fog. Otherwise, mostly cloudy, with a high near 52.