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Updated:December 24, 2025 2:01 am PST

Wind Advisory WIND ADVISORY  
Napa County

  Effective: Tue, 12/23 1:09pm Severity:  Moderate 
  Updated: December 24, 2025 2:01 am Urgency: Expected
  Expires: Wed, 12/24 4:00am Certainty: Likely

Areas Affected: North Bay Interior Mountains - North Bay Interior Valleys - San Francisco Bay Shoreline - East Bay Interior Valleys - Santa Cruz Mountains - Santa Clara Valley Including San Jose - Eastern Santa Clara Hills - East Bay Hills - Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park
 
Alert Details:
* WHAT...Southeast winds 20 to 30 mph with gusts up to 55 mph
expected.

* WHERE...The East Bay and San Francisco Bay Shoreline, The Santa
Clara Valley and Eastern Hills, The Santa Cruz Mountains, Most of
San Benito County and the Cholame Hills in Southeast Monterey
County, North Bay Interior Mountains, and North Bay Interior
Valleys.

* WHEN...Until 4 AM PST Wednesday.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.

Information:
Winds this strong can make driving difficult, especially for high
profile vehicles. Use extra caution.
Flood Watch FLOOD WATCH  
Napa County

  Effective: Tue, 12/23 11:39pm Severity:  Severe 
  Updated: December 24, 2025 2:01 am Urgency: Future
  Expires: Wed, 12/24 3:00pm 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 to be
possible from multiple lines of showers and thunderstorms, strong
at times, moving across the area.

* WHERE...The Northern San Francisco Bay Area (Napa, Sonoma, and
Marin counties).

* WHEN...Through Friday evening.

* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Creeks and streams may rise out of their banks. Low water crossings
may become flooded. Flooding may occur in poor drainage and urban
areas.

* ADDITIONAL DETAILS...
- Multiple rounds of moderate to heavy rainfall are expected across
the North Bay through Friday evening. An additional 3-5" is
possible over the North Bay Mountains and 2-3" over the North Bay
Valleys by Friday. Nuisance flooding will increase throughout the
week with sharp rises in smaller creeks and minor flooding along
some of the mainstream rivers (Russian River, Napa River). Debris
flows are possible particularly for the Pickett Burn Scar.
- 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.