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

Excessive Rainfall and Significant Flooding in the Upper Midwest This Weekend

Heavy to excessive rainfall is expected over the weekend across eastern Iowa, northern Missouri, northwest Illinois and southern Wisconsin. Numerous flash floods, some with significant impacts, are expected in these areas. Heaviest rainfall will occur overnight Saturday and Sunday, so be sure to have multiple ways to receive warnings. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Overcast

55°F

13°C

Humidity 93%
Wind Speed SW 3 MPH
Barometer 29.92 in (1013.21 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 10 Aug 03:53 AM PDT
Extended Forecast for

Saint Helena CA

  • Today

    Today: Sunny and hot, with a high near 97. Light and variable wind becoming west 5 to 10 mph in the afternoon.

    High: 97 °F

    Hot

  • Tonight

    Tonight: Increasing clouds, with a low around 58. West wind 5 to 9 mph becoming calm in the evening.

    Low: 58 °F

    Increasing
    Clouds

  • Monday

    Monday: Partly sunny, then gradually becoming sunny, with a high near 93. Light and variable wind becoming west 5 to 10 mph in the afternoon.

    High: 93 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 56. West wind 6 to 11 mph becoming light west northwest in the evening.

    Low: 56 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Sunny, with a high near 89. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 2am. Otherwise, partly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Clear
    then Patchy
    Fog

  • Wednesday

    Wednesday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 85.

    High: 85 °F

    Patchy Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 53.

    Low: 53 °F

    Patchy Fog

  • Thursday

    Thursday: Areas of fog before 9am. Otherwise, mostly sunny, with a high near 86.

    High: 86 °F

    Areas Fog
    then Sunny

Detailed Forecast

Today
Sunny and hot, with a high near 97. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Tonight
Increasing clouds, with a low around 58. West wind 5 to 9 mph becoming calm in the evening.
Monday
Partly sunny, then gradually becoming sunny, with a high near 93. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Monday Night
Increasing clouds, with a low around 56. West wind 6 to 11 mph becoming light west northwest in the evening.
Tuesday
Sunny, with a high near 89. Calm wind becoming southwest around 5 mph in the afternoon.
Tuesday Night
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 54.
Wednesday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 85.
Wednesday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 53.
Thursday
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 86.
Thursday Night
Patchy fog after 4am. Otherwise, mostly clear, with a low around 52.
Friday
Patchy fog. Otherwise, sunny, with a high near 84.
Friday Night
Patchy fog. Otherwise, mostly clear, with a low around 52.
Saturday
Areas of fog. Otherwise, mostly sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Helena CA
 38.51°N 122.46°W (Elev. 203 ft)
Last Update:
7:31 pm PDT Aug 9, 2025
Forecast Valid:
4am PDT Aug 10, 2025-6pm PDT Aug 16, 2025
 
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Additional Resources

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High Temperature

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Chance of Precipitation