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

Severe Weather in the Central Plains; Fire Concerns in the Southern High Plains and Southwest; Late-Season Mountain Snow

Severe storms, including large hail, wind, and perhaps a couple of tornadoes, are possible in the central Plains. Dry, windy conditions and lightning from dry thunderstorms may produce hazardous fire conditions in the Southwest and southern High Plains. Late-season snow is expected in the Northwest and the Great Basin. Heat is spreading across the eastern U.S.. 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.

Clear

55°F

13°C

Humidity 54%
Wind Speed NNW 8 MPH
Barometer 29.92 in (1013.21 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 17 May 02:00 AM PDT
Extended Forecast for

Saint Helena CA

Coastal Flood Advisory until May 19, 03:00am
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory until May 19, 03:00am

    NOW until 3:00am Tue

    Coastal Flood Advisory

  • Overnight

    Low: 51 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 78. North wind 6 to 16 mph, with gusts as high as 31 mph.

    High: 78 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 57. North northwest wind 8 to 14 mph, with gusts as high as 32 mph.

    Low: 57 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 88. North wind 7 to 11 mph, with gusts as high as 30 mph.

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 54. North wind around 5 mph becoming calm in the evening.

    Low: 54 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

Detailed Forecast

Overnight
Mostly clear, with a low around 51. West northwest wind 3 to 6 mph. Winds could gust as high as 18 mph.
Sunday
Sunny, with a high near 78. North wind 6 to 16 mph, with gusts as high as 31 mph.
Sunday Night
Mostly clear, with a low around 57. North northwest wind 8 to 14 mph, with gusts as high as 32 mph.
Monday
Sunny, with a high near 88. North wind 7 to 11 mph, with gusts as high as 30 mph.
Monday Night
Clear, with a low around 54. North wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 91.
Tuesday Night
Mostly clear, with a low around 56.
Wednesday
Sunny, with a high near 92.
Wednesday Night
Mostly clear, with a low around 55.
Thursday
Sunny, with a high near 93.
Thursday Night
Mostly clear, with a low around 52.
Friday
Sunny, with a high near 87.
Friday Night
Patchy fog. Otherwise, mostly clear, with a low around 51.
Saturday
Patchy fog. Otherwise, sunny, with a high near 82.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Helena CA
 38.51°N 122.46°W (Elev. 203 ft)
Last Update:
1:34 am PDT May 17, 2026
Forecast Valid:
2am PDT May 17, 2026-6pm PDT May 23, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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