Coastal Low Brings Flash Flood Threat to Mid-Atlantic Tuesday
- A coastal low, previously known as Potential Tropical Cyclone Eight, is moving north from the Carolinas towards the mid-Atlantic region.
- Heavy rainfall and thunderstorms are expected, particularly affecting North Carolina and southeastern Virginia, with flash flood watches in effect.
- The area is likely to experience a decrease in precipitation by Wednesday, but coastal flooding remains a concern, especially during high tide.
A coastal low, previously identified as Potential Tropical Cyclone Eight, is currently progressing northward from the Carolinas towards the mid-Atlantic region. This system is characterized by a moist, onshore flow that is expected to generate persistent showers and thunderstorms, particularly impacting North Carolina and southeastern Virginia. As a result, flash flood watches have been issued for these areas, indicating a significant risk of flash flooding due to locally heavy rainfall. The Interstate 95 corridor in the mid-Atlantic has been highlighted for a Level 2 out of 4 risk of flash flooding on Tuesday. This indicates that while the threat is serious, it is not the highest level of concern. The FOX Forecast Center anticipates that precipitation coverage and intensity will diminish by Wednesday as the low pressure system moves off the coast. Despite the expected decrease in rainfall, coastal flooding remains a significant concern due to prolonged onshore winds. Minor to moderate coastal flooding is anticipated, particularly during high tide, with Thursday afternoon being the most likely time for widespread flooding. In contrast, Boston is experiencing its longest dry spell in 25 years, having not seen rain since August 20. This dry stretch may come to an end with potential rainfall forecasted between Wednesday night and Thursday, which could break the current record.