Headline:
Flood Advisory issued November 20 at 4:30PM PST until November 20 at 6:30PM PST by NWS San Francisco CA
Event:
Flood Advisory
Urgency:
Expected
Effective:
November 20, 2024 - 4:30pm
Expires:
November 20, 2024 - 6:30pm
Description:
* WHAT...Small stream flooding caused by excessive rainfall
continues.
* WHERE...Areas near Calistoga, St. Helena, and Lake Berryessa in
northern Sonoma and Napa counties.
* WHEN...Until 630 PM PST.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Rises in small streams and normally dry arroyos.
* ADDITIONAL DETAILS...
- At 430 PM PST, Doppler radar and automated rain gauges
indicated heavy rain. This will cause small stream flooding.
Between 1.5 and 3 inches of rain have fallen.
- Additional rainfall amounts of 1 to 2 inches are expected
over the area. This additional rain will result in minor
flooding.
- Some locations that will experience flooding include...
St. Helena, Calistoga, Angwin and Deer Park.
- http://www.weather.gov/safety/flood
Instruction:
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
Area Description:
Napa, CA; Sonoma, CA
Forcast Office:
NWS San Francisco CA