National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heavy Lake Effect Snow Downwind of Lakes Erie and Ontario; Fire Weather Concerns in the Southern Plains and Southeast

A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. There is increasing confidence in snow squalls causing bursts of snow & gusty winds on New Year's Eve. Elevated fire weather conditions will continue today over parts of the Southern Plains and across much of the Southeast U.S. Read More >

Hazardous Weather Conditions

Current conditions at

DW7094 Mill Valley (D7094)

Lat: 37.91333°NLon: 122.54833°WElev: 190.0ft.

NA

N/A

Humidity NA
Wind Speed NA NA MPH
Barometer 30.15 in (1021.0 mb)
Dewpoint N/A
Visibility NA
Last update NA
Extended Forecast for

Larkspur CA

Coastal Flood Advisory December 31, 05:00am until January 4, 02:00pm
Cold Weather Advisory until December 30, 09:00am
Dense Fog Advisory December 30, 05:45am until December 30, 10:00am
Click here for hazard details and duration
Coastal Flood Advisory
Cold Weather Advisory
Dense Fog Advisory
  •  
    Cold Weather Advisory until December 30, 09:00am
    Dense Fog Advisory December 30, 05:45am until December 30, 10:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Overnight

    Low: 40 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 53. Northeast wind 7 to 10 mph.

    High: 53 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A 10 percent chance of rain after 4am. Cloudy, with a steady temperature around 48. North wind around 6 mph.

    Low: 48 °F

    Cloudy then
    Slight Chance
    Rain

  • Wednesday

    Wednesday: Rain likely, mainly after 10am. Cloudy, with a high near 52. Northeast wind 6 to 8 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 52 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: Rain. Patchy fog. Low around 48. East northeast wind around 6 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 48 °F

    Rain and
    Patchy Fog

  • New Year's Day

    New Year's Day: Rain. Patchy fog. High near 58. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 58 °F

    Rain and
    Patchy Fog

  • Thursday Night

    Thursday Night: Rain before 4am, then showers likely and possibly a thunderstorm after 4am. Areas of fog before 1am. Low around 54. Chance of precipitation is 90%.

    Low: 54 °F

    Showers and
    Areas Fog

  • Friday

    Friday: Showers likely and possibly a thunderstorm, then rain after 10am. Cloudy, with a high near 59.

    High: 59 °F

    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 40. North wind around 6 mph.
Tuesday
Mostly cloudy, with a high near 53. Northeast wind 7 to 10 mph.
Tuesday Night
A 10 percent chance of rain after 4am. Cloudy, with a steady temperature around 48. North wind around 6 mph.
Wednesday
Rain likely, mainly after 10am. Cloudy, with a high near 52. Northeast wind 6 to 8 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain. Patchy fog. Low around 48. East northeast wind around 6 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
New Year's Day
Rain. Patchy fog. High near 58. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Rain before 4am, then showers likely and possibly a thunderstorm after 4am. Areas of fog before 1am. Low around 54. Chance of precipitation is 90%.
Friday
Showers likely and possibly a thunderstorm, then rain after 10am. Cloudy, with a high near 59.
Friday Night
Rain. Cloudy, with a low around 49.
Saturday
Rain likely. Mostly cloudy, with a high near 56.
Saturday Night
Rain likely. Patchy fog. Otherwise, mostly cloudy, with a low around 47.
Sunday
Rain likely. Areas of fog. Otherwise, mostly cloudy, with a high near 56.
Sunday Night
Rain likely. Patchy fog. Otherwise, mostly cloudy, with a low around 48.
Monday
Rain likely. Patchy fog. Otherwise, mostly cloudy, with a high near 56.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Larkspur CA
 37.94°N 122.51°W (Elev. 43 ft)
Last Update:
12:27 am PST Dec 30, 2025
Forecast Valid:
5am PST Dec 30, 2025-6pm PST Jan 5, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation