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Updated:November 17, 2025 1:31 am PST

Flood Advisory FLOOD ADVISORY  
Los Angeles County

  Effective: Mon, 11/17 12:19am Severity: Minor
  Updated: November 17, 2025 1:31 am Urgency: Expected
  Expires: Mon, 11/17 3:15am Certainty: Likely

Areas Affected: Marin, CA - Napa, CA - Sonoma, CA
 
Alert Details:
* WHAT...Flooding caused by excessive rainfall is expected.

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

* WHEN...Until 315 AM PST.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.

* ADDITIONAL DETAILS...
- At 1219 AM PST, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area. Between 0.5 and 1 inch of rain
has 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...
Santa Rosa, Napa, Petaluma, Novato, Rohnert Park, Windsor,
American Canyon, Healdsburg, Sonoma, Sebastopol, Cotati, St.
Helena, Calistoga, South Santa Rosa Cdp, Roseland, Larkfield-
Wikiup, Boyes Hot Springs, Black Point-Green Point, Tomales
and Dillon Beach.
- 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.
Flood Advisory FLOOD ADVISORY  
Los Angeles County

  Effective: Sun, 11/16 11:45pm Severity: Minor
  Updated: November 17, 2025 1:31 am Urgency: Expected
  Expires: Mon, 11/17 2:45am Certainty: Likely

Areas Affected: Marin, CA
 
Alert Details:
* WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...A portion of northern California, including the following
county, southeastern Marin.

* WHEN...Until 245 AM PST.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.

* ADDITIONAL DETAILS...
- At 1144 PM PST, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area. Between 0.5 and 1 inch of rain
has fallen.
- Additional rainfall amounts up to 1 inch are expected over
the area. This additional rain will result in minor flooding.
- Some locations that will experience flooding include...
San Rafael, Novato, Mill Valley, San Anselmo, Larkspur, Corte
Madera, Tiburon, Fairfax, Sausalito, San Geronimo, Lucas
Valley-Marinwood, Kentfield, Stinson Beach, Muir Beach,
Tamalpais-Homestead, Tamalpais-Homestead Valley, Black Point-
Green Point, Strawberry, Point Reyes Station and Ross.
- 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.
Flood Advisory FLOOD ADVISORY  
Marin County

  Effective: Mon, 11/17 12:19am Severity: Minor
  Updated: November 17, 2025 1:31 am Urgency: Expected
  Expires: Mon, 11/17 3:15am Certainty: Likely

Areas Affected: Marin, CA - Napa, CA - Sonoma, CA
 
Alert Details:
* WHAT...Flooding caused by excessive rainfall is expected.

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

* WHEN...Until 315 AM PST.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.

* ADDITIONAL DETAILS...
- At 1219 AM PST, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area. Between 0.5 and 1 inch of rain
has 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...
Santa Rosa, Napa, Petaluma, Novato, Rohnert Park, Windsor,
American Canyon, Healdsburg, Sonoma, Sebastopol, Cotati, St.
Helena, Calistoga, South Santa Rosa Cdp, Roseland, Larkfield-
Wikiup, Boyes Hot Springs, Black Point-Green Point, Tomales
and Dillon Beach.
- 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.
Flood Advisory FLOOD ADVISORY  
Marin County

  Effective: Sun, 11/16 11:45pm Severity: Minor
  Updated: November 17, 2025 1:31 am Urgency: Expected
  Expires: Mon, 11/17 2:45am Certainty: Likely

Areas Affected: Marin, CA
 
Alert Details:
* WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...A portion of northern California, including the following
county, southeastern Marin.

* WHEN...Until 245 AM PST.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.

* ADDITIONAL DETAILS...
- At 1144 PM PST, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area. Between 0.5 and 1 inch of rain
has fallen.
- Additional rainfall amounts up to 1 inch are expected over
the area. This additional rain will result in minor flooding.
- Some locations that will experience flooding include...
San Rafael, Novato, Mill Valley, San Anselmo, Larkspur, Corte
Madera, Tiburon, Fairfax, Sausalito, San Geronimo, Lucas
Valley-Marinwood, Kentfield, Stinson Beach, Muir Beach,
Tamalpais-Homestead, Tamalpais-Homestead Valley, Black Point-
Green Point, Strawberry, Point Reyes Station and Ross.
- 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.