Severe Thunderstorms in the Eastern U.S.; Flash Flooding Possible in the Southwest U.S.

Scattered thunderstorms capable of producing damaging wind gusts and isolated large hail are expected across parts of the Ohio and Tennessee Valleys into the central Appalachians Friday. Across the southwest US, 1 to 2 inches of rain, with isolated totals up to 4 inches, are expected across portions of Arizona and New Mexico through Saturday, bringing the potential for flash flooding. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Clear

60°F

16°C

Humidity	83%
Wind Speed	SSE 5 MPH
Barometer	29.85 in (1010.84 mb)
Dewpoint	55°F (13°C)
Visibility	10.00 mi
Last update	04 Sep 08:53 PM PDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Saint Helena CA

Tonight
Low: 54 °F
Mostly Clear
then Patchy
Fog
Friday
High: 84 °F
Patchy Fog
then Sunny
Friday Night
Low: 54 °F
Clear then
Patchy Fog
Saturday
High: 82 °F
Patchy Fog
then Sunny
Saturday Night
Low: 56 °F
Mostly Clear
Sunday
High: 80 °F
Mostly Sunny
Sunday Night
Low: 57 °F
Mostly Clear
then Patchy
Fog
Monday
High: 79 °F
Slight Chance
Drizzle and
Patchy Fog
Monday Night
Low: 55 °F
Slight Chance
Drizzle

Detailed Forecast

Tonight

Patchy fog after 1am. Otherwise, partly cloudy, with a low around 54. West southwest wind around 5 mph becoming calm in the evening.

Friday

Patchy fog before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 84. Calm wind becoming west southwest 5 to 8 mph in the afternoon.

Friday Night

Patchy fog after 2am. Otherwise, increasing clouds, with a low around 54. West southwest wind 5 to 7 mph becoming calm in the evening.

Saturday

Patchy fog before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 82. Calm wind becoming west southwest 5 to 9 mph in the afternoon.

Saturday Night

Mostly clear, with a low around 56. West wind 5 to 11 mph.

Sunday

Mostly sunny, with a high near 80.

Sunday Night

Patchy fog after 5am. Otherwise, partly cloudy, with a low around 57.

Monday

A slight chance of drizzle. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 79.

Monday Night

A slight chance of drizzle. Partly cloudy, with a low around 55.

Tuesday

A slight chance of drizzle. Patchy fog before 8am. Otherwise, partly sunny, with a high near 78.