Special Marine Warning Issued for Charleston Harbor and Coastal South Carolina Waters
This alert is no longer in effect.
NOAA issued it on April 6, 2026, 4 months ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
The National Weather Service has issued a Special Marine Warning for Charleston Harbor and surrounding coastal waters through early Monday morning due to strong thunderstorms and high wind gusts.
Read this weather record in 30 seconds
- Record type
- Special Marine Warning
- Affected area
- Coastal South Carolina
- Issued
- April 6, 2026
- Issuing authority
- NWS Charleston
Marine notices apply to named waters or shoreline zones. They may not describe conditions on land, even when the nearest place name is the same.
Record status: historical. It was issued 4 months ago; use the issuing agency's live warning service for current conditions in Coastal South Carolina.
Alert Details
The National Weather Service in Charleston has issued a Special Marine Warning for the coastal waters of South Carolina. This alert was triggered by radar-indicated strong thunderstorms moving through the region.
Affected Areas
The warning covers the following maritime regions:
- Charleston Harbor
- Coastal waters from South Santee River to Edisto Beach SC out 20 nm
- Waters from South Santee River SC to Edisto Beach SC extending from 20 nm to 40 nm
Specific locations impacted include Y-73 Reef, Capers Reef, Capers Mid Shelf, Doug Mellichamp Reef, Comanche Reef, Joe Shuford Reef, Jimmy Leland Tug, Charleston Sixty, Bull Breakers, Rattlesnake Shoal, Charleston Nearshore Reef, Capers Island Buoy, Air Force Reef, Charleston Coastal Anglers, and Bulls Bay.
What You Should Do
Mariners are advised to move to safe harbor immediately. Remain in a secure location until the hazardous weather conditions have passed.
Expected Conditions
At 10:41 PM EDT, a line of strong thunderstorms was located from near N. Edisto Nearshore Reef to 14 NM southeast of Edisto Offshore Reef. The storms are moving northeast at 30 knots.
- Hazard: Wind gusts up to 34 knots.
- Impact: Small craft may sustain damage due to briefly higher winds and suddenly higher waves.
Timeline
The warning is effective immediately as of 10:41 PM EDT on March 15, 2026. The alert is scheduled to expire at 12:45 AM EDT on March 16, 2026.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Frequently Asked Questions
Common questions about this NWS weather alert.