* WHAT. For the Coastal Flood Advisory, up to one foot of inundation above ground level in low-lying areas near shorelines and tidal waterways. For the High Rip Current Risk, dangerous rip currents expected. For the Coastal Flood Watch, one to two feet of inundation above ground level possible in low-lying areas near shorelines and tidal waterways. * WHERE. Delaware Beaches. * WHEN. For the Coastal Flood Advisory, until 6 AM EDT Saturday. For the High Rip Current Risk, from 6 AM EDT this morning through Saturday evening. For the Coastal Flood Watch, from Saturday morning through Sunday afternoon. * IMPACTS. At this level, widespread roadway flooding occurs in coastal and bayside communities and along inland tidal waterways. Many roads become impassable. Some damage to vulnerable structures may begin to occur. Rip currents can sweep even the best swimmers away from shore into deeper water. * ADDITIONAL DETAILS. Some guidance continues to indicate moderate coastal flooding may occur during the Friday morning high tide cycle. While confidence in this remains low, a short- fused warning may be issued during the next update to cover this high tide cycle.