550
WHUS42 KCHS 172250
CFWCHS
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE CHARLESTON SC
650 PM EDT SUN MAY 17 2026
SCZ149-150-180300-
/O.CON.KCHS.CF.Y.0011.260517T2300Z-260518T0300Z/
COASTAL COLLETON-CHARLESTON-
650 PM EDT SUN MAY 17 2026
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 11 PM EDT THIS
EVENING...
* WHAT...UP TO ONE HALF FOOT OF INUNDATION ABOVE GROUND LEVEL
EXPECTED ALONG SHORELINES AND TIDAL WATERWAYS (7.1 TO 7.3 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 9:22 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
-------- --------- --------- --------- ------- --------
17/09 AM 5.8 0.0 0.7 N/A NONE
17/09 PM 7.2 1.4 0.5 N/A MINOR
18/10 AM 5.3 -0.5 0.2 N/A NONE
18/10 PM 7.1 1.3 0.5 N/A MINOR
19/11 AM 5.3 -0.5 0.3 N/A NONE
19/11 PM 6.8 1.0 0.4 N/A NONE
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