Headline:
Flood Advisory issued November 20 at 10:27PM PST until November 21 at 2:15AM PST by NWS San Francisco CA
Event:
Flood Advisory
Urgency:
Expected
Effective:
November 20, 2024 - 10:27pm
Expires:
November 21, 2024 - 2:15am
Description:
* WHAT...Urban area and small stream flooding caused by excessive
rainfall continues.
* WHERE...Areas near Calistoga, St. Helena, Yountville, Lake
Berryessa, and the city of Sonoma in northeastern Sonoma and
northern and central Napa counties.
* WHEN...Until 215 AM PST.
* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Rises in small streams and normally dry arroyos. Overflowing poor
drainage areas.
* ADDITIONAL DETAILS...
- At 1026 PM PST, Doppler radar and automated rain gauges
indicated heavy rain. This will cause urban and small stream
flooding. Between 3 and 5 inches of rain have fallen.
- Additional rainfall amounts of 0.5 to 1.5 inches are expected
over the area. This additional rain will result in minor
flooding.
- Some locations that will experience flooding include...
Napa, Sonoma, St. Helena, Calistoga, Boyes Hot Springs,
Yountville, Angwin, Deer Park, Glen Ellen, Eldridge, Fetters
Hot Spring, Fetters Hot Springs-Agua Caliente, El Verano and
Temelec.
- 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