Coastal Flood Advisory
Coastal Hazard Message
National Weather Service Charleston SC
339 AM EDT Sat Aug 23 2025
SCZ049-050-231400-
/O.NEW.KCHS.CF.Y.0015.250823T1100Z-250823T1400Z/
Coastal Colleton-Charleston-
339 AM EDT Sat Aug 23 2025
...COASTAL FLOOD ADVISORY IN EFFECT FROM 7 AM TO 10 AM EDT THIS
MORNING...
* WHAT...Up to one half foot of inundation above ground level
expected along shorelines and tidal waterways (7.0 to 7.2 feet
Mean Lower Low Water at Charleston).
* WHERE...Coastal Colleton and Charleston Counties.
* WHEN...From 7 AM to 10 AM EDT this morning.
* IMPACTS...This could result in some roads becoming impassable.
* ADDITIONAL DETAILS...High tide will occur around 8:46 AM today
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
-------- --------- --------- --------- ------- --------
23/09 AM 7.1 1.3 1.6 N/A Minor
23/09 PM 7.6 1.8 1.5 N/A Moderate
24/09 AM 6.5 0.7 1.0 N/A None
24/10 PM 6.8 1.0 0.9 N/A None
25/10 AM 6.2 0.4 0.6 N/A None
25/10 PM 6.3 0.5 0.6 N/A None
&&
$$
Coastal Hazard Message
National Weather Service Wilmington NC
150 AM EDT Sat Aug 23 2025
SCZ054-056-231500-
/O.EXB.KILM.CF.Y.0052.250823T1100Z-250823T1500Z/
Coastal Horry-Coastal Georgetown-
150 AM EDT Sat Aug 23 2025
...COASTAL FLOOD ADVISORY IN EFFECT FROM 7 AM TO 11 AM EDT THIS
MORNING...
* WHAT...Up to one half foot of inundation above ground level
expected in low-lying areas near shorelines and tidal
waterways.
* WHERE...Coastal Horry and Coastal Georgetown Counties.
* WHEN...From 7 AM to 11 AM EDT this morning.
* IMPACTS...Vulnerable causeways to and from local beaches may
experience minor coastal flooding. Low-lying locations along the
Intracoastal Waterway and adjacent tidal creeks may observe
minor coastal flooding.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Take the necessary actions to protect flood-prone property.
&&
Time of high total tides are approximate to the nearest hour.
Springmaid Pier at Myrtle Beach
MLLW Categories - Minor 7.0 ft, Moderate 8.5 ft, Major 10.5 ft
MHHW Categories - Minor 1.4 ft, Moderate 2.9 ft, Major 4.9 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
23/08 AM 7.0 1.4 1.6 3 Minor
23/08 PM 7.5 1.9 1.6 2-3 Minor
24/09 AM 6.9 1.3 1.4 2 None
24/09 PM 7.2 1.6 1.4 2 Minor
25/09 AM 6.6 1.0 1.2 1 None
25/10 PM 6.6 1.0 1.1 1 None
&&
$$
