WHUS72 KCHS 200630 MWWCHS URGENT - MARINE WEATHER MESSAGE National Weather Service Charleston SC 230 AM EDT Fri Mar 20 2026 AMZ374-200730- /O.EXP.KCHS.SC.Y.0022.000000T0000Z-260320T0700Z/ Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM- 230 AM EDT Fri Mar 20 2026 ...SMALL CRAFT ADVISORY WILL EXPIRE AT 3 AM EDT EARLY THIS MORNING... $$