959  
WHUS42 KCHS 110023  
CFWCHS  
 
COASTAL HAZARD MESSAGE  
NATIONAL WEATHER SERVICE CHARLESTON SC  
823 PM EDT SUN AUG 10 2025  
 
SCZ049-050-110300-  
/O.CON.KCHS.CF.Y.0011.000000T0000Z-250811T0300Z/  
COASTAL COLLETON-CHARLESTON-  
823 PM EDT SUN AUG 10 2025  
 
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 11 PM EDT THIS  
EVENING...  
 
* WHAT...UP TO ONE HALF FOOT OF INUNDATION ABOVE GROUND LEVEL  
ALONG SHORELINES AND TIDAL WATERWAYS (6.9 TO 7.1 FEET MEAN  
LOWER LOW WATER AT CHARLESTON).  
 
* WHERE...COASTAL COLLETON AND CHARLESTON COUNTIES.  
 
* WHEN...UNTIL 11 PM EDT THIS EVENING.  
 
* IMPACTS...THIS COULD RESULT IN SOME ROADS BECOMING IMPASSABLE.  
 
* ADDITIONAL DETAILS...HIGH TIDE WILL OCCUR AROUND 9:40 PM 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  
-------- --------- --------- --------- ------- --------  
10/09 PM 7.0 1.2 1.0 N/A MINOR  
11/10 AM 6.4 0.6 0.9 N/A NONE  
11/10 PM 6.8 1.0 0.8 N/A NONE  
12/11 AM 6.4 0.6 0.7 N/A NONE  
12/11 PM 6.6 0.8 0.8 N/A NONE  
13/11 AM 6.5 0.7 0.8 N/A NONE  
 

 
 

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab SC Page
The Nexlab GA Page Main Text Page