Severe Weather and Heavy Rainfall from the Midwest to the Ohio Valley; Mid-Summer Heat Continues

Severe thunderstorm and heavy rainfall threats will persist from the Midwest to Lower Great Lakes through Monday, shifting into the Ohio Valley and Central Appalachians Monday evening into Tuesday. Mid-summer heat will continue across much of the CONUS this week, with record highs possible well into the 100s across the south-central High Plains. Read More >

Hazardous Weather Conditions

Coastal Flood Advisory until August 13, 02:00 AM PDT

Current conditions at

Napa, Napa County Airport (KAPC)

Lat: 38.2075°NLon: 122.27944°WElev: 33.0ft.

Mostly Cloudy

58°F

14°C

Humidity	90%
Wind Speed	SW 6 MPH
Barometer	29.83 in (1010.16 mb)
Dewpoint	55°F (13°C)
Visibility	10.00 mi
Last update	10 Aug 02:54 AM PDT

More Information:

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

Extended Forecast for

4 Miles E Saint Helena CA

Coastal Flood Advisory August 10, 03:05am until August 13, 02:00am

Click here for hazard details and duration

Coastal Flood Advisory

Coastal Flood Advisory August 10, 03:05am until August 13, 02:00am
NOW until 2:00am Thu
Coastal Flood Advisory
Overnight
Low: 55 °F
Areas Fog
Monday
High: 89 °F
Areas Fog
then Sunny
Monday Night
Low: 52 °F
Mostly Clear
then Patchy
Fog
Tuesday
High: 87 °F
Areas Fog
then Sunny
Tuesday Night
Low: 52 °F
Mostly Clear
then Patchy
Fog
Wednesday
High: 84 °F
Areas Fog
then Sunny
Wednesday Night
Low: 51 °F
Patchy Fog
Thursday
High: 78 °F
Areas Fog
then Sunny

Detailed Forecast

Overnight

Areas of fog. Otherwise, mostly cloudy, with a low around 55. Calm wind.

Monday

Areas of fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 89. Calm wind becoming south around 6 mph in the afternoon.

Monday Night

Patchy fog after midnight. Otherwise, partly cloudy, with a low around 52. Calm wind.

Tuesday

Areas of fog before 9am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 87. Calm wind becoming south southwest around 6 mph in the afternoon.

Tuesday Night

Patchy fog after midnight. Otherwise, partly cloudy, with a low around 52. Southwest wind around 5 mph becoming calm in the evening.

Wednesday

Areas of fog before 10am. Otherwise, mostly sunny, with a high near 84.

Wednesday Night

Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 51.

Thursday

Areas of fog before 8am. Otherwise, mostly sunny, with a high near 78.

Thursday Night

Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 50.

Friday

Areas of fog before 8am. Otherwise, mostly sunny, with a high near 80.