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

Moke Impacts Hawaii; Severe Thunderstorms and Heavy Rainfall from the Great Basin to the Plains

Heavy rain from Tropical Storm Moke will begin to impact the Big Island today, risking life-threatening flooding and mudslides in windward and southeast areas. Severe thunderstorms are expected across the northern Rockies/Plains and northern Great Basin. Repeated storms and heavy rainfall may cause flash flooding from the Plains into the Lower MS Valley. Dangerous heat persists across the South. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Clear

91°F

33°C

Humidity 26%
Wind Speed SW 8 MPH
Barometer 29.88 in (1011.85 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 23 Aug 02:35 PM PDT
Extended Forecast for

Saint Helena CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 93. South wind around 6 mph.

    High: 93 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 56. West southwest wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Increasing
    Clouds

  • Monday

    Monday: Widespread haze before 9am. Mostly cloudy through mid morning, then gradual clearing, with a high near 89. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 89 °F

    Haze then
    Sunny

  • Monday Night

    Monday Night: Patchy fog after 1am. Otherwise, increasing clouds, with a low around 54. West wind 5 to 7 mph becoming calm in the evening.

    Low: 54 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Areas of fog before 9am. Otherwise, partly sunny, with a high near 89. Calm wind.

    High: 89 °F

    Areas Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 55.

    Low: 55 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 93. South wind around 6 mph.
Tonight
Increasing clouds, with a low around 56. West southwest wind around 5 mph becoming calm in the evening.
Monday
Widespread haze before 9am. Mostly cloudy through mid morning, then gradual clearing, with a high near 89. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Monday Night
Patchy fog after 1am. Otherwise, increasing clouds, with a low around 54. West wind 5 to 7 mph becoming calm in the evening.
Tuesday
Areas of fog before 9am. Otherwise, partly sunny, with a high near 89. Calm wind.
Tuesday Night
Mostly cloudy, with a low around 55.
Wednesday
Mostly sunny, with a high near 92.
Wednesday Night
Partly cloudy, with a low around 56.
Thursday
Mostly sunny, with a high near 91.
Thursday Night
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 55.
Friday
Patchy fog. Otherwise, mostly sunny, with a high near 88.
Friday Night
Patchy fog. Otherwise, mostly clear, with a low around 54.
Saturday
Patchy fog. Otherwise, mostly sunny, with a high near 89.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Helena CA
 38.51°N 122.46°W (Elev. 203 ft)
Last Update:
2:27 pm PDT Aug 23, 2026
Forecast Valid:
2pm PDT Aug 23, 2026-6pm PDT Aug 29, 2026
 
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