The National Weather Service in Mount Holly has issued a coastal flood advisory, remaining in effect until 6 a.m. EDT Sunday, highlighting the risk of one foot of inundation above ground level in low-lying areas near shorelines and tidal waterways. Affected regions include Gloucester, Camden, and Northwestern Burlington in New Jersey, alongside Delaware, Philadelphia, and Lower Bucks in Pennsylvania. National Weather Service Philadelphia advises residents to anticipate minor tidal flooding which can lead to partial or full road closures.
According to the detailed forecast, the Delaware River at Philadelphia is expected to rise, causing minor flooding with a total tide of 9.0 ft MLLW, or 2.3 ft MHHW, representing a 2.0 ft departure from the normal. While the afternoon tide on the same day is predicted to not pose any immediate flooding concerns, the next high tide at 3 a.m. tomorrow is to yet again slightly flood, reaching approximately 8.6 ft MLLW, or 1.9 ft MHHW.
The National Weather Service underscored the need for precaution, stressing that "Minor tidal flooding often results in some road closures. Usually, the most vulnerable roadways will flood." To be safe from the unpredictable conditions, they advise not to leave vehicles in locations prone to tidal flooding and to avoid driving through floodwaters. This advice is underscored by the threat of vehicle damage, which could lead to costly repairs.
Similarly, the Delaware River at Burlington is expected to be affected, with a minor flooding event recorded at a height of 10.0 ft MLLW, or 2.3 ft MHHW, which constitutes a 2.0 ft rise above the norm. Though the tide is forecasted to subsequently fall back below flooding levels, authorities continue to closely monitor the situation and strongly suggest referring to the Advanced Hydrologic Prediction Service for further water level and flood impact information.
