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
DIABLO GRANDE (DBLC1)
Lat: 37.32927°NLon: 121.29538°WElev: 1861.0ft.NA
45°F
7°C
| Humidity | 60% |
| Wind Speed | S 3 MPH |
| Barometer | NA |
| Dewpoint | 32°F (0°C) |
| Visibility | NA |
| Last update | 30 Dec 01:00 AM PST |
Extended Forecast for
16 Miles SSE Tracy CA
Dense Fog Advisory December 30, 02:00am until December 30, 12:00pm
Overnight
Low: 47 °F
Mostly Clear
Tuesday
High: 53 °F
Increasing
CloudsTuesday Night
Low: 46 °F
Mostly Cloudy
then Slight
Chance RainWednesday
High: 52 °F
Rain Likely
Wednesday Night
Low: 47 °F
Rain
New Year's Day
High: 54 °F
Rain
Thursday Night
Low: 51 °F
Rain Likely
Friday
High: 53 °F
Rain Likely
Friday Night
Low: 46 °F
Rain
Detailed Forecast
Overnight
Mostly clear, with a steady temperature around 47. South wind around 5 mph.
Tuesday
Increasing clouds, with a high near 53. South southeast wind around 6 mph.
Tuesday Night
A 10 percent chance of rain after 4am. Mostly cloudy, with a low around 46. Light and variable wind becoming south around 5 mph after midnight.
Wednesday
Rain likely, mainly after 10am. Cloudy, with a high near 52. South southeast wind 6 to 8 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain. Low around 47. Southeast wind 8 to 10 mph. Chance of precipitation is 100%.
New Year's Day
Rain. High near 54. Chance of precipitation is 90%.
Thursday Night
Rain likely. Mostly cloudy, with a low around 51. Chance of precipitation is 70%.
Friday
Rain likely. Mostly cloudy, with a high near 53.
Friday Night
Rain. Mostly cloudy, with a low around 46.
Saturday
Rain likely. Mostly cloudy, with a high near 49.
Saturday Night
Rain likely. Mostly cloudy, with a low around 44.
Sunday
A chance of rain. Partly sunny, with a high near 49.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 43.
Monday
A chance of rain. Partly sunny, with a high near 49.
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
16 Miles SSE Tracy CA
37.51°N 121.37°W (Elev. 3127 ft)
37.51°N 121.37°W (Elev. 3127 ft)
1:21 am PST Dec 30, 2025
1am PST Dec 30, 2025-6pm PST Jan 5, 2026
Additional Resources
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