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Coastal Flood Advisory

Coastal Hazard Message
National Weather Service San Francisco CA
300 AM PST Sun Dec 5 2021

...KING TIDES WILL CAUSE MINOR COASTAL FLOODING AT LOW LYING
SPOTS DURING HIGH TIDE TODAY...

.The highest astronomical tides of the year, commonly referred to
as the King Tides, will again impact the coast today. King Tides
occur when tidal forces maximize as the moon, earth, and sun come
into alignment while the moon is in perigee (nearest to the earth)
and the earth is at perihelion (nearest to the sun). These tides
will peak during the mid to late morning and have historically
resulted in the localized flooding of specific low lying areas
each year. In addition, the lowest low tides of the season will
follow hours later in the afternoon.

CAZ006-506-508-052300-
/O.CON.KMTR.CF.Y.0003.000000T0000Z-211205T2300Z/
San Francisco-North Bay Interior Valleys-
San Francisco Bay Shoreline-
300 AM PST Sun Dec 5 2021

...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS
AFTERNOON...

* WHAT...Minor coastal flooding expected at prone low lying
  coastal locations across the San Francisco Bay shoreline during
  peak high tide today.

* WHERE...Low lying areas of the San Francisco Bay shoreline.

* WHEN...Until 3 PM PST Sunday. The highest high tides are
  expected to occur during mid to late morning while the lowest
  low tides will occur during mid afternoon to early evening.
  Please refer to local tidal data forecasts available for
  several coastal and bayshore locations at
  www.tidesandcurrents.noaa.gov.

* IMPACTS...Flooding of areas previously impacted by King Tide
  events is expected, including low lying lots, parks, and roads
  throughout the San Francisco Bay Shoreline with the highest
  high tides. Difficulty navigating shallow bay waters during
  the lowest low tides.

* ADDITIONAL DETAILS...Tide poolers and beachgoers should be
  familiar with the times and heights of local tidal levels to
  avoid hazards that may arise from rapidly shifting water
  levels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If travel is required, allow extra time as some roads may be
closed. Do not drive around barricades or through water of
unknown depth. Take the necessary actions to protect flood-prone
property.

&&

$$



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