WHUS42 KCHS 190342 CFWCHS Coastal Hazard Message National Weather Service Charleston SC 1142 PM EDT Mon May 18 2026 SCZ149-150-190445- /O.EXP.KCHS.CF.Y.0012.000000T0000Z-260519T0400Z/ Coastal Colleton-Charleston- 1142 PM EDT Mon May 18 2026 ...COASTAL FLOOD ADVISORY WILL EXPIRE AT MIDNIGHT EDT TONIGHT... $$