NWS coastal zone AMZ340
Marine alerts linked to this verified National Weather Service zone.
Current answer
NWS updates are unavailable, so this service cannot confirm whether Charleston Harbor has no active alerts.
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Charleston Harbor, Coastal waters from South Santee River to Edisto Beach SC out 20 NM
Allendale, Berkeley, Charleston and 5 more
Charleston Harbor, Coastal waters from Edisto Beach SC to Savannah GA out 20 NM, Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm, including Grays Reef National Marine Sanctuary and 4 more
Charleston Harbor, Coastal waters from Edisto Beach SC to Savannah GA out 20 NM, Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm, including Grays Reef National Marine Sanctuary and 1 more
Charleston Harbor, Coastal waters from Edisto Beach SC to Savannah GA out 20 NM, Coastal waters from South Santee River to Edisto Beach SC out 20 NM
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 to 60 NM
This page uses official NWS zone membership. For exact location matching, an alert must include official geometry or be linked to a verified zone geometry that contains the point.
How location matching works