Coastal Flood Advisory

Coastal Hazard Message
National Weather Service Eureka CA
948 PM PST Thu Nov 6 2025

CAZ103-072100-
/O.NEW.KEKA.CF.Y.0006.251107T1900Z-251107T2100Z/
Northern Humboldt Coast-
948 PM PST Thu Nov 6 2025

...COASTAL FLOOD ADVISORY IN EFFECT FROM 11 AM TO 1 PM PST
FRIDAY...

* WHAT...High astronomical tides will cause minor flooding in low
  lying areas around Humboldt Bay. Up to one quarter foot of
  saltwater inundation above ground level is possible near
  shorelines and tidal waterways. Between 8.8 and 9.1 feet MLLW
  at the North Spit tide gauge is predicted.

* WHERE...Northern Humboldt Coast County.

* WHEN...From 11 AM to 1 PM PST Friday. High tide is at 12:01 PM
  at the Humboldt Bay North Spit tide gauge. Saltwater inundation
  will be possible 1 to 2 hours before and after high tide.

* IMPACTS...Flooding of low lying areas around Humboldt Bay
  including parks and roads with only isolated closures
  expected. Flooding will likely impact Jackson Ranch Road in
  the Arcata Bottoms and several roads in King Salmon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Coastal Flood Advisory indicates that onshore winds and tides
will combine to generate flooding of low areas along the shore.

Feet Above Ground is locally defined as feet above the Highest
Astronomical Tide or HAT.

&&

$$

Coastal Hazard Message
National Weather Service San Francisco CA
506 PM PST Thu Nov 6 2025

CAZ506-508-071300-
/O.CON.KMTR.CF.Y.0015.000000T0000Z-251108T2200Z/
North Bay Interior Valleys-San Francisco Bay Shoreline-
506 PM PST Thu Nov 6 2025

...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 2 PM PST
SATURDAY...

* WHAT...Up to 1.2 ft of inundation above ground level is
  possible in low lying areas near shorelines and tidal
  waterways.

* WHERE...Bayshore locations along the San Francisco Bay and San
  Pablo Bay.

* WHEN...From 8 AM Tuesday to 2 PM PST Saturday.

* IMPACTS...Flooding of lots, parks, and roads with only
  isolated road closures expected.

* ADDITIONAL DETAILS...At the San Francisco tidal gauge high tide
  is expected to be 1.1 ft above normal (7.0 ft MLLW) at 11:42 AM
  Friday, and 0.9 ft above normal (6.7 ft MLLW) at 12:31 PM
  Saturday. High tide timing varies up to 90 minutes earlier or
  later along the coast and throughout the Bay respectively.

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.

&&

$$