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Flash flooding possible along Interstate 95 as Thanksgiving travel increases

November 21, 2022

Downpours could lead to localized flash flooding through midweek along the I-95 corridor, potentially slowing down traffic for people traveling ahead of the Thanksgiving holiday.

Surface analysis Monday afternoon depicts a stalled frontal boundary across South Florida and an extended ridge of high pressure across much of the Southeast. These two features will act in tandem through Wednesday to increase onshore flow and bring the risk of locally heavy downpours, especially as a trough of low pressure develops along the east coast Tuesday into Wednesday. Deep atmospheric moisture will exist across much of eastern and central Florida, resulting in the risk for flash flooding. The Weather Prediction Center depicts a sliver of enhanced flash flood potential along the I-95 corridor Monday into Tuesday, as anomalously high moisture content moves overhead. One to 3 inches of rain are forecast through Wednesday in coastal areas, though a few locally higher totals will also be possible. Model guidance does depict a modest amount of instability, which could lead to a few rumbles of thunder. Severe weather does not appear likely as of publishing according to the Storm Prediction Center's Tuesday outlook. Areas hard-hit by flooding from Ian and additional rains from Nicole should pay close attention to the forecast, as some of these locales will again face the risk of additional flood concerns.

Easterly to northeasterly winds will continue the risk for coastal flooding and erosion. This risk will be an ongoing one in the St. Johns River basin, especially in flood-prone locations and on the western bank of the river. The trough of low pressure should gradually peel away from the coast through Wednesday, tapering off rain chances from west to east through the Thanksgiving holiday. Most locations will be drying out and warming up ahead of the next cold frontal passage, which is likely to occur Friday into Saturday.

Sources include nearest National Weather Service office, National Hurricane Center, and the Florida Public Radio Emergency Network (@FloridaStorms).
Sources include nearby emergency management agencies, FEMA, and your local NPR affiliate. 
Sources include the Florida Department of Transportation, Florida Highway Patrol and other nearby traffic information.

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