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

Heavy Rain in the Southern U.S.; Active Weather Continues in Alaska

A storm system will bring heavy rainfall, thunderstorms, and flooding threats to portions of the Southern Plains today, the Lower Mississippi Valley Saturday, and the Southeast into the Mid-Atlantic on Sunday. Another Bering system will impact the Alaskan West Coast and Central Interior through the weekend bringing moderate to heavy snow, high winds, and/or some blizzard conditions. Read More >

Hazardous Weather Conditions

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Rain

51°F

11°C

Humidity 85%
Wind Speed SE 8 MPH
Barometer 29.89 in (1012.19 mb)
Dewpoint 47°F (8°C)
Visibility 9.00 mi
Last update 15 Feb 06:53 AM PST
Extended Forecast for

Saint Helena CA

Coastal Flood Advisory until February 17, 03:00pm
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory until February 17, 03:00pm

    NOW until 3:00pm Tue

    Coastal Flood Advisory

  • Today

    High: 57 °F

    Rain

  • Tonight

    Tonight: Rain. Patchy fog between 11pm and 3am. Low around 45. Calm wind becoming southeast around 5 mph after midnight. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 45 °F

    Rain and
    Patchy Fog

  • Washington's Birthday

    Washington's Birthday: Rain. Patchy fog between 7am and 10am. High near 53. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 53 °F

    Rain and
    Patchy Fog

  • Monday Night

    Monday Night: Rain, mainly after 4am. Low around 39. Northwest wind 3 to 7 mph. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 39 °F

    Rain

  • Tuesday

    Tuesday: Rain before 10am, then showers and possibly a thunderstorm between 10am and 4pm, then rain and possibly a thunderstorm after 4pm. High near 49. Southwest wind 5 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 49 °F

    Showers

  • Tuesday Night

    Tuesday Night: Rain, mainly before 10pm. Patchy fog after 4am. Low around 33. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 33 °F

    Rain then
    Chance Rain
    and Patchy
    Fog

  • Wednesday

    Wednesday: Rain, mainly after 10am. Patchy fog before 8am. High near 52. Chance of precipitation is 80%.

    High: 52 °F

    Rain and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: Rain, mainly before 10pm. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 36.

    Low: 36 °F

    Rain and
    Patchy Fog

Detailed Forecast

Today
Rain. High near 57. Southeast wind 5 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Tonight
Rain. Patchy fog between 11pm and 3am. Low around 45. Calm wind becoming southeast around 5 mph after midnight. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Washington's Birthday
Rain. Patchy fog between 7am and 10am. High near 53. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Monday Night
Rain, mainly after 4am. Low around 39. Northwest wind 3 to 7 mph. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
Rain before 10am, then showers and possibly a thunderstorm between 10am and 4pm, then rain and possibly a thunderstorm after 4pm. High near 49. Southwest wind 5 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday Night
Rain, mainly before 10pm. Patchy fog after 4am. Low around 33. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
Rain, mainly after 10am. Patchy fog before 8am. High near 52. Chance of precipitation is 80%.
Wednesday Night
Rain, mainly before 10pm. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 36.
Thursday
Rain likely, mainly before 10am. Patchy fog before 7am. Otherwise, partly sunny, with a high near 52.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 36.
Friday
A chance of rain. Mostly cloudy, with a high near 54.
Friday Night
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 39.
Saturday
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:
Saint Helena CA
 38.49°N 122.45°W (Elev. 230 ft)
Last Update:
3:03 am PST Feb 15, 2026
Forecast Valid:
7am PST Feb 15, 2026-6pm PST Feb 21, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation