Heat Persists in the South Central U.S. and California; Heavy Rain in the Ohio Valley

Sweltering heat remains across the South-Central Plains and Lower/Middle Mississippi Valley, as well as in the Southwest and California this week with limited nighttime relief. Heavy rainfall will lead to localized areas of flash flooding in parts of the Ohio Valley/Central Appalachians. Dry and breezy conditions will enhance fire weather concerns across the northern Rockies and High Plains. Read More >

Hazardous Weather Conditions

Heat Advisory until September 10, 10:00 PM PDT

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

79°F

26°C

Humidity	39%
Wind Speed	SSE 4 MPH
Barometer	29.97 in (1014.9 mb)
Dewpoint	52°F (11°C)
Visibility	10.00 mi
Heat Index	79°F (26°C)
Last update	09 Sep 10:20 PM PDT

More Information:

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

Extended Forecast for

3 Miles SSE Lake Berryessa CA

Heat Advisory September 9, 10:43pm until September 10, 10:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory September 9, 10:43pm until September 10, 10:00pm
NOW until 10:00pm Thu
Heat Advisory
Tonight
Low: 79 °F
Mostly Clear
Thursday
High: 97 °F
Mostly Sunny
then Patchy
Smoke
Thursday Night
Low: 60 °F
Patchy Smoke
then Clear
Friday
High: 89 °F
Sunny then
Patchy Smoke
Friday Night
Low: 58 °F
Clear
Saturday
High: 80 °F
Sunny
Saturday Night
Low: 54 °F
Mostly Clear
Sunday
High: 83 °F
Sunny

Detailed Forecast

Tonight

Mostly clear, with a low around 79. Calm wind.

Thursday

Patchy smoke after 1pm. Mostly sunny and hot, with a high near 97. Calm wind becoming west southwest 5 to 9 mph in the afternoon. Winds could gust as high as 21 mph.

Thursday Night

Patchy smoke before 8pm. Mostly clear, with a low around 60. West wind 3 to 7 mph.

Friday

Patchy smoke after 2pm. Sunny, with a high near 89. Calm wind becoming southwest 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.

Friday Night

Clear, with a low around 58. West southwest wind 5 to 8 mph, with gusts as high as 18 mph.

Saturday

Sunny, with a high near 80.

Saturday Night

Mostly clear, with a low around 54.

Sunday

Sunny, with a high near 83.