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

Current conditions at

Port Chicago (PCOC1)

Lat: 38.056°NLon: 122.0395°WElev: 0.0ft.

40°F

4°C

Humidity	NA
Wind Speed	E 8 MPH
Barometer	30.24 in (1024.04 mb)
Dewpoint	N/A
Visibility	NA
Wind Chill	35°F (2°C)
Last update	NA

More Information:

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

Extended Forecast for

5 Miles NW Concord CA

Dense Fog Advisory December 30, 01:50am until December 30, 10:00am

Cold Weather Advisory until December 30, 09:00am

Click here for hazard details and duration

Dense Fog Advisory

Cold Weather Advisory

Dense Fog Advisory December 30, 01:50am until December 30, 10:00am
Cold Weather Advisory until December 30, 09:00am
NOW: Multiple hazards in effect
Click HERE for Details
Overnight
Low: 38 °F
Patchy Dense
Fog
Tuesday
High: 48 °F
Mostly Cloudy
Tuesday Night
Low: 44 °F
Cloudy then
Slight Chance
Rain
Wednesday
High: 50 °F
Chance Rain
then Rain
Wednesday Night
Low: 48 °F
Rain
New Year's Day
High: 56 °F
Rain and
Patchy Fog
Thursday Night
Low: 54 °F
Showers and
Areas Fog
Friday
High: 57 °F
Showers and
Patchy Fog

Detailed Forecast

Overnight

Patchy dense fog. Otherwise, mostly cloudy, with a low around 38. Northeast wind around 7 mph.

Tuesday

Mostly cloudy, with a high near 48. East northeast wind 9 to 11 mph.

Tuesday Night

A 10 percent chance of rain after 4am. Cloudy, with a low around 44. East wind 7 to 9 mph.

Wednesday

Rain, mainly after 4pm. High near 50. East northeast wind 6 to 10 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Wednesday Night

Rain. Low around 48. East wind around 10 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

New Year's Day

Rain. Patchy fog. High near 56. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

Thursday Night

Rain, mainly before 4am, then showers likely and possibly a thunderstorm after 4am. Areas of fog. Low around 54. Chance of precipitation is 80%.

Friday

Showers likely and possibly a thunderstorm, then rain after 10am. Patchy fog before 7am. Otherwise, cloudy, with a high near 57.

Friday Night

Rain. Cloudy, with a low around 49.

Saturday

Rain likely. Patchy fog after 4pm. Otherwise, mostly cloudy, with a high near 54.

Saturday Night

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