Persistent rain and thunderstorms are leading to an increasing risk of flash flooding in the Northeast, caused by an Omega blocking pattern stalling a cutoff low-pressure system over the Tennessee and Ohio valleys. This system is drawing moisture from the Atlantic Ocean, which is expected to lead to significant rainfall totals, particularly in higher-elevation areas. Although flash flooding remains a concern, the nature of scattered storms suggests that widespread significant flooding is unlikely. Forecasters provide caution over the shifting location and timings of heavier rain bands in the coming days.
"A cutoff low means that it's cut off from the main flow, meaning that there's nothing around to steer it, meaning that it doesn't move very fast at all."
"Depending on the position of the frontal boundary, the easterly winds at the surface may enhance precipitation in some higher-terrain areas, especially across portions of western Connecticut."
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