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WARNINGS - WATCHES - ADVISORIES - STATEMENTS
Updates every 15 Minutes
Updated:November 22, 2024 12:00 pm PST

Flood Advisory FLOOD ADVISORY  
Napa County

Effective: Fri, 11/22 9:35am Severity: Minor
Updated: November 22, 2024 12:00 pm Urgency: Expected
Expires: Sat, 11/23 3:15am Certainty: Likely

Areas Affected: Marin, CA - Napa, CA - Sonoma, CA
 
Alert Details:
* WHAT...Urban area and small stream flooding caused by excessive
rainfall continues.

* WHERE...A portion of northern California, including the following
counties, Marin, Napa and Sonoma.

* WHEN...Until 315 AM PST Saturday.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Water over roadways. Overflowing poor drainage areas.

* ADDITIONAL DETAILS...
- At 935 AM PST, Doppler radar and automated rain gauges
indicated heavy rain. This is causing urban and small stream
flooding. Between 5 and 22 inches of rain have fallen.
- Additional rainfall amounts of 1 to 3 inches are expected
over the area. This additional rain will result in minor
flooding.
- Some locations that will experience flooding include...
Santa Rosa, Napa, Petaluma, San Rafael, Novato, Rohnert Park,
Windsor, American Canyon, Mill Valley, San Anselmo, Larkspur,
Healdsburg, Sonoma, Corte Madera, Tiburon, Cloverdale,
Fairfax, Sebastopol, Cotati and Sausalito.
- http://www.weather.gov/safety/flood

Information:
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.

Be aware of your surroundings and do not drive on flooded roads.

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.
Wind Advisory WIND ADVISORY  
Napa County

Effective: Fri, 11/22 6:51am Severity:  Moderate 
Updated: November 22, 2024 12:00 pm Urgency: Expected
Expires: Fri, 11/22 3:00pm Certainty: Likely

Areas Affected: San Francisco - Marin Coastal Range - Sonoma Coastal Range - North Bay Interior Mountains - Coastal North Bay Including Point Reyes National Seashore - San Francisco Peninsula Coast - Santa Cruz Mountains - Eastern Santa Clara Hills - East Bay Hills - Santa Lucia Mountains and Los Padres National Forest - Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park - Southern Monterey Bay and Big Sur Coast
 
Alert Details:
* WHAT...South winds 15 to 30 mph with gusts up to 50 mph expected,
locally higher gusts greater than 65 mph are possible above 2,500
feet.

* WHERE...Coastal and higher elevation regions of the North Bay, the
city of San Francisco, the East Bay and Santa Clara Hills, Santa
Cruz Mountains and San Mateo, the Gabilan Range, the Santa Lucia
Range, southern Monterey Bay, and coastal Big Sur.

* WHEN...Until 10 PM PST this evening.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result. The
combination of wind and moist soils will increase the risk for
downed trees particularly across the North Bay.

* ADDITIONAL DETAILS...A narrow frontal rain band will move through
the Bay Area and Central Coast today which will result in gusty
south winds ahead of and during its passage. Winds will start to
ease overnight after the frontal rain band has progressed out of
the region. Moderate to heavy rains over the last 48 hours have
saturated soils across the North Bay which will lead to increased
risk of downed trees and power lines as gusty winds redevelop.

Information:
Winds this strong can make driving difficult, especially for high
profile vehicles. Use extra caution.

Secure outdoor objects.
Flood Watch FLOOD WATCH  
Napa County

Effective: Fri, 11/22 5:25am Severity:  Severe 
Updated: November 22, 2024 12:00 pm Urgency: Future
Expires: Fri, 11/22 1:30pm Certainty: Possible

Areas Affected: Marin Coastal Range - Sonoma Coastal Range - North Bay Interior Mountains - Coastal North Bay Including Point Reyes National Seashore - North Bay Interior Valleys
 
Alert Details:
* WHAT...Flooding caused by excessive rainfall continues.

* WHERE...The North Bay.

* WHEN...Through Saturday morning.

* IMPACTS...Creeks and streams may rise out of their banks. Flooding
may occur in poor drainage and urban areas. Low-water crossings
may be flooded.

* ADDITIONAL DETAILS...
- http://www.weather.gov/safety/flood

Information:
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.