* WHAT...Up to one half foot of inundation above ground level expected along shorelines and tidal waterways (7.3 to 7.5 feet Mean Lower Low Water at Charleston). * WHERE...Coastal Colleton and Charleston Counties. * WHEN...From 6 AM to 10 AM EDT this morning. * IMPACTS...This could result in some roads becoming impassable. * ADDITIONAL DETAILS...High tide will occur around 8:03 AM today at Charleston. Saltwater inundation will be possible 1 to 2 hours before and after high tide. If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. Visit water.weather.gov for additional water level and flood impact information.