Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Current conditions at

DIABLO GRANDE (DBLC1)

Lat: 37.32927°NLon: 121.29538°WElev: 1861.0ft.

NA

53°F

12°C

Humidity 66%
Wind Speed SSW 5 MPH
Barometer NA
Dewpoint 42°F (6°C)
Visibility NA
Last update 19 Jan 06:00 PM PST
Extended Forecast for

16 Miles SSE Tracy CA

Dense Fog Advisory until January 20, 12:00pm
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until January 20, 12:00pm

    NOW until 12:00pm Tue

    Dense Fog Advisory

  • Tonight

    Low: 50 °F

    Mostly Clear
    then Haze

  • Tuesday

    Tuesday: Widespread haze before 10am. Partly sunny, with a high near 57. South wind around 6 mph becoming east in the afternoon.

    High: 57 °F

    Haze then
    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 48. West wind 3 to 5 mph.

    Low: 48 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 57. Light and variable wind becoming north northeast around 5 mph in the afternoon.

    High: 57 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 47. West wind around 6 mph.

    Low: 47 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 56.

    High: 56 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 54.

    High: 54 °F

    Sunny

Detailed Forecast

Tonight
Widespread haze after midnight. Partly cloudy, with a steady temperature around 50. Light and variable wind becoming south southeast around 6 mph after midnight.
Tuesday
Widespread haze before 10am. Partly sunny, with a high near 57. South wind around 6 mph becoming east in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 48. West wind 3 to 5 mph.
Wednesday
Mostly cloudy, with a high near 57. Light and variable wind becoming north northeast around 5 mph in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 47. West wind around 6 mph.
Thursday
Partly sunny, with a high near 56.
Thursday Night
Partly cloudy, with a low around 44.
Friday
Sunny, with a high near 54.
Friday Night
Mostly clear, with a low around 43.
Saturday
Sunny, with a high near 54.
Saturday Night
Mostly clear, with a low around 44.
Sunday
Mostly sunny, with a high near 55.
Sunday Night
Partly cloudy, with a low around 45.
Monday
Mostly sunny, with a high near 56.
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ABOUT THIS FORECAST

 
Point Forecast:
16 Miles SSE Tracy CA
 37.51°N 121.37°W (Elev. 3127 ft)
1:26 pm PST Jan 19, 2026
7pm PST Jan 19, 2026-6pm PST Jan 26, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database