836
WHUS42 KCHS 221035
CFWCHS

Coastal Hazard Message
National Weather Service Charleston SC
635 AM EDT Fri Aug 22 2025

SCZ049-050-221845-
/O.NEW.KCHS.CF.Y.0014.250822T2300Z-250823T0300Z/
Coastal Colleton-Charleston-
635 AM EDT Fri Aug 22 2025

...COASTAL FLOOD ADVISORY IN EFFECT FROM 7 PM TO 11 PM EDT THIS
EVENING...

* WHAT...Up to one half foot of inundation above ground level
  expected along shorelines and tidal waterways (7.3 to 7.5 feet
  Mean Lower Low Water at Charleston).

* WHERE...Coastal Colleton and Charleston Counties.

* WHEN...From 7 PM to 11 PM EDT this evening.

* IMPACTS...This could result in some roads becoming impassable.

* ADDITIONAL DETAILS...High tide will occur around 8:30 PM this
  evening at Charleston. Saltwater inundation will be possible 1
  to 2 hours before and after high tide.

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.

Visit water.weather.gov for additional water level and flood
impact information.

&&

Time of high total tides are approximate to the nearest hour.

Charleston Harbor SC
MLLW Categories - Minor 7.0 ft, Moderate 7.5 ft, Major 8.0 ft
MHHW Categories - Minor 1.2 ft, Moderate 1.7 ft, Major 2.2 ft

             Total      Total    Departure
 Day/Time    Tide       Tide     from Norm   Waves    Flood
            ft MLLW    ft MHHW       ft       ft      Impact
 --------  ---------  ---------  ---------  -------  --------
 22/08 AM     6.5        0.7        1.1       N/A      None
 22/08 PM     7.4        1.6        1.2       N/A     Minor
 23/09 AM     6.6        0.8        1.1       N/A      None
 23/09 PM     7.3        1.5        1.2       N/A     Minor
 24/09 AM     6.5        0.7        1.0       N/A      None

&&

$$