572
FXUS62 KCHS 191858
AFDCHS
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON SC
258 PM EDT SUN APR 19 2026
WHAT HAS CHANGED
ISSUED SMALL CRAFT ADVISORY FOR CHARLESTON HARBOR AND CHARLESTON
COUNTY NEARSHORE WATERS.
KEY MESSAGES
- 1) MINOR COASTAL FLOODING POSSIBLE ALONG THE SOUTH CAROLINA
COAST THIS EVENING.
DISCUSSION
KEY MESSAGE 1: MINOR COASTAL FLOODING POSSIBLE ALONG THE SOUTH
CAROLINA COAST THIS EVENING.
TIDAL ANOMALY HAS DECREASED BY A FEW TENTHS OF A FOOT SINCE LAST
EVENING GIVEN THE DEVELOPING OFFSHORE WINDS. HOWEVER, WINDS WILL
CLOCK AROUND TO NNE THIS EVENING WHICH IS A MUCH MORE FAVORABLE
DIRECTION FOR POSITIVE DEPARTURE. THE BIG QUESTION IS HOW MUCH
ANOMALY BUILDS BEFORE THE 10:30 PM HIGH TIDE. WE MAINTAINED THE
PREVIOUS FORECAST OF +0.8 FT ANOMALY AND 7.3 FT MLLW PEAK TIDE
LEVEL (MINOR). A COASTAL FLOOD ADVISORY WILL LIKELY BE NEEDED.
AVIATION /18Z SUNDAY THROUGH FRIDAY/
VFR. GUSTY NNW WINDS WILL DIMINISH AROUND SUNSET.
EXTENDED AVIATION OUTLOOK: DRY HIGH PRESSURE KEEPS VFR CONDITIONS
IN PLACE THROUGH MUCH OF THE COMING WEEK.
MARINE
A BRIEFLY PERIOD OF ENHANCED NNE GRADIENT EXPECTED THROUGH
MONDAY MORNING AS HIGH PRESSURE BUILDS BEHIND A COLD FRONT. 25
KT GUSTS THIS AFTERNOON IN CHARLESTON HARBOR AND THIS
AFTERNOON/EVE IN THE CHARLESTON COUNTY NEARSHORE WATERS
NECESSITATED A SMALL CRAFT ADVISORY ISSUANCE. ALSO MAINTAINED THE
SMALL CRAFT ADVISORY FOR THE OFFSHORE GA WATERS UNTIL MONDAY
AFTERNOON TO HIGHLIGHT A MORE PROLONGED PERIOD OF 25 KT GUSTS
AND 4-6 FT SEAS.
RIP CURRENTS: A MODERATE RISK OF RIP CURRENTS REMAINS IN PLACE FOR
ALL BEACHES THROUGH MONDAY DUE TO LINGERING SWELLS, LINGERING
ASTRONOMICAL FACTORS, AND STRONG LONGSHORE CURRENT.
CHS WATCHES/WARNINGS/ADVISORIES
GA...NONE.
SC...NONE.
MARINE...SMALL CRAFT ADVISORY UNTIL 7 PM EDT THIS EVENING FOR AMZ340.
SMALL CRAFT ADVISORY UNTIL MIDNIGHT EDT TONIGHT FOR AMZ360.
SMALL CRAFT ADVISORY FROM 7 PM THIS EVENING TO 5 PM EDT MONDAY
FOR AMZ384.
JRL
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