# HEADLINE
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COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING
# SUMMARY
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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 -------- --------- --------- --------- ------- -------- 23/06 AM 7.0 1.2 1.2 N/A Minor 23/06 PM 7.0 1.2 1.3 N/A Minor 24/07 AM 7.5 1.7 1.3 N/A Moderate 24/07 PM 7.6 1.8 1.8 N/A Moderate 25/08 AM 8.0 2.2 1.5 N/A Major 25/08 PM 7.6 1.8 1.8 N/A Moderate
# DETAILS
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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 8 AM EDT this morning.
IMPACTS
This could result in some roads becoming impassable.
ADDITIONAL DETAILS
High tide will occur around 6:04 AM today at Charleston. Saltwater inundation will be possible 1 to 2 hours before and after high tide.
ISSUED AT
Friday, October 23, 2026 at 5:09 AM EDT
ISSUED BY
National Weather Service Charleston SC
HEADER
Coastal Hazard Message
# PRECAUTIONARY/PREPAREDNESS ACTIONS
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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.
# AREAS AFFECTED
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Charleston, Coastal Colleton
