175 
WGUS86 KMTR 220902
FLSMTR

Flood Advisory
National Weather Service San Francisco CA
102 AM PST Mon Dec 22 2025

CAC055-097-221200-
/O.NEW.KMTR.FA.Y.0081.251222T0902Z-251222T1200Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Napa CA-Sonoma CA-
102 AM PST Mon Dec 22 2025

...FLOOD ADVISORY IN EFFECT UNTIL 4 AM PST EARLY THIS MORNING...

* WHAT...Flooding caused by excessive rainfall is is being reported
  by CHP within Sonoma County along Mark West Creek.

* WHERE...West Central Napa County in northern California...
  East Central Sonoma County in northern California...

* Until 400 AM PST.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.
  Rises in small streams and normally dry arroyos. CHP reports
  indicate flooding over roadways in the vicinity of Mark West Creek.

* ADDITIONAL DETAILS...
  - At 1259 AM PST, Doppler radar indicated light moderate rain.
    Minor flooding is already occurring near smaller creeks and
    streams. Flooding over the roadway may be harder to see at night.
    If you encounter a flooded roadway, turn around, dont drown!
  - Minor flooding is expected to continue as the main rain band
    shifts northward. Additional rainfall up to 0.5" is possible.
  - Some locations that will experience flooding include...
    Santa Rosa, Rohnert Park, Sebastopol, Cotati, St. Helena,
    Calistoga, Roseland, South Santa Rosa Cdp, Larkfield-Wikiup,
    South Santa Rosa, Graton and Deer Park.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, dont 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.

&&

LAT...LON 3841 12248 3839 12258 3832 12266 3835 12283
      3840 12289 3845 12287 3849 12280 3857 12263
      3858 12256 3856 12252 3852 12247 3848 12245
      3842 12245


$$

Kennedy

992 
WGUS86 KMTR 221152
FLSMTR

Flood Advisory
National Weather Service San Francisco CA
352 AM PST Mon Dec 22 2025

CAC055-097-221202-
/O.EXP.KMTR.FA.Y.0081.000000T0000Z-251222T1200Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Napa CA-Sonoma CA-
352 AM PST Mon Dec 22 2025

...FLOOD ADVISORY WILL EXPIRE AT 4 AM PST EARLY THIS MORNING...

The Flood Advisory will expire at 4 AM PST early this morning for a
portion of northern California, including the following areas, Napa
and Sonoma.

The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.

A Flood Watch remains in effect until 1000 PM PST Friday for a
portion of northern California...

&&

LAT...LON 3857 12263 3849 12280 3845 12287 3840 12289
      3835 12283 3832 12266 3839 12258 3841 12248
      3842 12245 3848 12245 3852 12247 3856 12252
      3858 12256


$$

Kennedy