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 >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

Lat: 38.5°NLon: 122.81667°WElev: 125.0ft.

Clear

45°F

7°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 30.18 in (1022.01 mb)
Dewpoint 45°F (7°C)
Visibility 7.00 mi
Last update 30 Dec 02:20 PM PST
Extended Forecast for

5 Miles SSW Saint Helena CA

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 51. Northeast wind around 11 mph.

    High: 51 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a temperature rising to around 52 by 5am. Northeast wind 6 to 9 mph.

    Low: 48 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 50 percent chance of rain after 10am.  Cloudy, with a temperature falling to around 46 by 5pm. Northeast wind 5 to 8 mph.  New precipitation amounts between a tenth and quarter of an inch possible.

    High: 52 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: Rain.  Low around 47. Northeast wind 8 to 10 mph.  Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 47 °F

    Rain

  • New Year's Day

    New Year's Day: Rain.  High near 56. East wind around 8 mph becoming south in the afternoon. Winds could gust as high as 21 mph.  Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 56 °F

    Rain

  • Thursday Night

    Thursday Night: Rain.  Low around 52. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 52 °F

    Rain

  • Friday

    Friday: Rain.  High near 56. Breezy.  Chance of precipitation is 90%.

    High: 56 °F

    Rain and
    Breezy

  • Friday Night

    Friday Night: Rain.  Cloudy, with a low around 48.

    Low: 48 °F

    Rain

  • Saturday

    Saturday: Rain.  Mostly cloudy, with a high near 50.

    High: 50 °F

    Rain

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 51. Northeast wind around 11 mph.
Tonight
Mostly cloudy, with a temperature rising to around 52 by 5am. Northeast wind 6 to 9 mph.
Wednesday
A 50 percent chance of rain after 10am. Cloudy, with a temperature falling to around 46 by 5pm. Northeast wind 5 to 8 mph. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain. Low around 47. Northeast wind 8 to 10 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
New Year's Day
Rain. High near 56. East wind around 8 mph becoming south in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Rain. Low around 52. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Rain. High near 56. Breezy. Chance of precipitation is 90%.
Friday Night
Rain. Cloudy, with a low around 48.
Saturday
Rain. Mostly cloudy, with a high near 50.
Saturday Night
Rain. Mostly cloudy, with a low around 47.
Sunday
Rain likely. Mostly cloudy, with a high near 50.
Sunday Night
Rain likely. Mostly cloudy, with a low around 47.
Monday
Rain likely. Mostly cloudy, with a high near 50.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Saint Helena CA
 38.44°N 122.5°W (Elev. 1398 ft)
12:26 pm PST Dec 30, 2025
2pm PST Dec 30, 2025-6pm PST Jan 5, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database