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Areal Flood Advisory 0083
Issued by the San Francisco Bay Area / Monterey Forecast Office

Action Issued Starts Expiration
New 2025-12-22 10:13:46 2025-12-22 10:13:00 2025-12-22 13:15:00
Continued 2025-12-22 12:00:19 2025-12-22 13:15:00


Action: New
Issued At: 2025-12-22 10:13:46

403 
WGUS86 KMTR 221613
FLSMTR

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

CAC075-081-221915-
/O.NEW.KMTR.FA.Y.0083.251222T1613Z-251222T1915Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Francisco CA-San Mateo CA-
813 AM PST Mon Dec 22 2025

...FLOOD ADVISORY IN EFFECT UNTIL 1115 AM PST THIS MORNING...

* WHAT...Urban area and small stream flooding caused by excessive
  rainfall is expected.

* WHERE...Southeastern San Francisco County in northern California...
  Northern San Mateo County in northern California...

* Until 1115 AM PST.

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

* ADDITIONAL DETAILS...
  - At 813 AM PST, Doppler radar indicated heavy rain. This will
    cause urban and small stream flooding. Overflowing poor drainage
    areas will cause minor flooding in the advisory area.
  - Some locations that will experience flooding include...
    San Francisco, Daly City, San Mateo, Redwood City, South San
    Francisco, San Bruno, Pacifica, Foster City, Burlingame, San
    Carlos, Belmont, Millbrae, Hillsborough, Atherton, Woodside,
    Highlands-Baywood Park, North Fair Oaks, Brisbane, Colma and
    Highlands.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, dont drown when encountering flooded roads. Most flood
deaths occur in vehicles.

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

&&

LAT...LON 3771 12250 3772 12240 3766 12237 3763 12240
      3762 12235 3761 12238 3759 12232 3753 12228
      3757 12229 3757 12225 3753 12227 3755 12223
      3751 12225 3750 12222 3749 12223 3750 12218
      3742 12225 3749 12237 3764 12249


$$

JM


Action: Continued
Issued At: 2025-12-22 12:00:19

966 
WGUS86 KMTR 221759
FLSMTR

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

CAC075-081-221915-
/O.CON.KMTR.FA.Y.0083.000000T0000Z-251222T1915Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Francisco CA-San Mateo CA-
959 AM PST Mon Dec 22 2025

...FLOOD ADVISORY REMAINS IN EFFECT UNTIL 1115 AM PST THIS MORNING...

* WHAT...Urban area and small stream flooding caused by excessive
  rainfall continues.

* WHERE...Southern San Francisco County in northern California...
  Northwestern San Mateo County in northern California...

* Until 1115 AM PST.

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

* ADDITIONAL DETAILS...
  - At 959 AM PST, Doppler radar indicated moderate to heavy
    rainfall. Overflowing poor drainage areas will cause minor
    flooding in the advisory area.
  - Some locations that will experience flooding include...
    San Francisco, Daly City, South San Francisco, San Bruno,
    Pacifica, Burlingame, Millbrae, Brisbane, Colma and Broadmoor.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, dont drown when encountering flooded roads. Most flood
deaths occur in vehicles.

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

&&

LAT...LON 3771 12250 3772 12240 3768 12238 3766 12240
      3766 12237 3765 12240 3765 12239 3763 12240
      3764 12239 3762 12236 3761 12238 3760 12237
      3758 12242 3760 12245 3764 12249


$$

JM



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