000 WHUS72 KCHS 222234 MWWCHS URGENT - MARINE WEATHER MESSAGE National Weather Service Charleston SC 534 PM EST Mon Feb 22 2021 AMZ330-222345- /O.EXP.KCHS.SC.Y.0018.000000T0000Z-210222T2300Z/ Charleston Harbor- 534 PM EST Mon Feb 22 2021 ...SMALL CRAFT ADVISORY WILL EXPIRE AT 6 PM EST THIS EVENING... $$