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

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

6 Miles ESE Clayton 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: 35 °F
Areas Frost
Tuesday
High: 47 °F
Patchy Frost
and Patchy
Dense Fog
then Patchy
Fog
Tuesday Night
Low: 42 °F
Cloudy then
Slight Chance
Rain
Wednesday
High: 47 °F
Chance Rain
then Rain and
Patchy Fog
Wednesday Night
Low: 45 °F
Rain and
Patchy Fog
New Year's Day
High: 55 °F
Rain and
Patchy Fog
Thursday Night
Low: 52 °F
Showers and
Patchy Fog
Friday
High: 55 °F
Showers
Likely
Friday Night
Low: 49 °F
Rain

Detailed Forecast

Overnight

Areas of frost after 4am. Otherwise, mostly clear, with a low around 35. Southeast wind around 6 mph.

Tuesday

Patchy dense fog before 1pm. Patchy frost before 7am. Otherwise, mostly cloudy, with a high near 47. East wind around 8 mph.

Tuesday Night

A 10 percent chance of rain after 4am. Cloudy, with a low around 42. East wind around 5 mph.

Wednesday

Rain, mainly after 4pm. Patchy fog after 1pm. High near 47. East northeast wind around 7 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Wednesday Night

Rain. Patchy fog before 10pm, then patchy fog after 4am. Low around 45. East wind around 8 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 before 10am. High near 55. 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. Patchy fog before 1am. Low around 52. Chance of precipitation is 80%.

Friday

Showers likely and possibly a thunderstorm before 10am, then rain likely after 10am. Cloudy, with a high near 55.

Friday Night

Rain. Cloudy, with a low around 49.

Saturday

Rain likely. Mostly cloudy, with a high near 52.

Saturday Night

Rain likely. Patchy fog. Otherwise, mostly cloudy, with a low around 45.

Sunday

A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a high near 52.

Sunday Night

A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 45.