A period of minor coastal flooding is expected to impact parts of the Delmarva region this weekend, particularly along the Delaware coastline and Delaware Bay, as elevated water levels coincide with the upcoming high tide cycle.
A Coastal Flood Advisory has been issued for coastal Delaware, including areas along Delaware Bay, for Saturday evening into Saturday night. The primary concern centers around widespread minor tidal flooding, driven by a combination of astronomical and meteorological factors.
The timing of the new moon is playing a key role, producing higher-than-normal astronomical tides. At the same time, a developing onshore southeast flow will push additional water toward the coast. By Saturday evening, water levels are expected to rise to around one foot above normal, which is sufficient to bring many typically vulnerable locations into minor flood stage during high tide.
While some isolated minor flooding cannot be ruled out during the high tide cycle Friday night, impacts are expected to remain limited. The more notable and widespread concerns arrive with Saturday evening’s high tide, when the combination of elevated tides and persistent onshore winds peaks.
Residents in low-lying and flood-prone areas along the Delaware beaches and Delaware Bay should be prepared for minor roadway flooding, especially near the immediate coastline and tidal waterways. Poor drainage areas may also see water encroachment during the high tide window.
Conditions will begin to improve by Sunday, as a cold front moves through the region and winds shift offshore. This change in wind direction is expected to reduce water levels and limit any additional coastal flooding concerns by Sunday night.
It is worth noting that no tidal flooding is expected along the Chesapeake Bay side of the Eastern Shore, where water levels will remain below flood thresholds.
Those in vulnerable coastal areas are encouraged to monitor water levels and plan accordingly around the Saturday evening high tide cycle.
