Mean High Water
A project documenting the impacts of sea level rise & flooding across the South Carolina Lowcountry.
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TABLE OF CONTENTS
USEFUL LINKS
Mean High Water
TABLE OF CONTENTS
USEFUL LINKS
Peak Tide Elevation: 9.86-ft MLLW (6.74-ft NAVD88)
Peak Time: 16:54 GMT (11:54 AM EST)
- The surge from the nor’easter was the 4th highest tide on record in Charleston Harbor, and it exceeded the predictions by approximately 1.6 feet.
- It was the highest tide not associated with a tropical cyclone ever recorded in Charleston.
- There were approximately 3-6 inches of rainfall across the peninsula at the same time, resulting in compound flooding across the City.
- In 2023, we’ve seen the 4th and 6th highest tides ever recorded in the harbor.
- It’s the 6 tide this year to cross the major flood threshold, which is the 2nd most on record (there were 7 in 2020).
- There are only 49 major tidal floods on record (1921 - present), and 20 of them have occurred since 2020.