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

BLACK DIAMOND (PIBC1)

Lat: 37.95°NLon: 121.88444°WElev: 1600.0ft.

52°F

11°C

Humidity	39%
Wind Speed	N 10 MPH
Barometer	NA
Dewpoint	28°F (-2°C)
Visibility	NA
Last update	29 Dec 11:28 PM PST

More Information:

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

Extended Forecast for

Brentwood CA

Dense Fog Advisory December 30, 12:18am until December 30, 10:00am

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

Click here for hazard details and duration

Dense Fog Advisory

Cold Weather Advisory

Dense Fog Advisory December 30, 12:18am until December 30, 10:00am
NOW until 10:00am Tue
Dense Fog Advisory
Overnight
Low: 39 °F
Patchy Fog
Tuesday
High: 48 °F
Patchy Dense
Fog then
Mostly Cloudy
Tuesday Night
Low: 44 °F
Patchy Fog
then Slight
Chance Rain
Wednesday
High: 49 °F
Chance Rain
then Rain
Wednesday Night
Low: 48 °F
Rain
New Year's Day
High: 55 °F
Rain
Thursday Night
Low: 53 °F
Rain Likely
Friday
High: 57 °F
Rain Likely

Detailed Forecast

Overnight

Patchy fog before 1am, then patchy fog after 2am. Otherwise, mostly cloudy, with a steady temperature around 39. Calm wind.

Tuesday

Patchy dense fog before 7am. Otherwise, mostly cloudy, with a high near 48. Northeast wind 3 to 6 mph.

Tuesday Night

A 10 percent chance of rain after 4am. Patchy fog before 10pm. Otherwise, cloudy, with a low around 44. Calm wind.

Wednesday

Rain, mainly after 4pm. High near 49. Calm wind becoming north around 5 mph in the morning. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

Wednesday Night

Rain. Low around 48. East southeast wind 3 to 7 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

New Year's Day

Rain. High near 55. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

Thursday Night

Rain likely. Mostly cloudy, with a low around 53. Chance of precipitation is 70%.

Friday

Rain likely. Cloudy, with a high near 57.

Friday Night

Rain. Cloudy, with a low around 49.

Saturday

Rain likely, mainly before 10am. Mostly cloudy, with a high near 55.

Saturday Night

Rain likely. Mostly cloudy, with a low around 46.