Region faces more flooding downpours into July fourth - DC News FOX 5 DC WTTG

Region faces more flooding downpours into July fourth

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Accuweather Accuweather

ACCUWEATHER - Showers and thunderstorms capable of triggering new flash flooding incidents and localized severe weather will continue to plague the East through the first part of the week and into the Fourth of July.

The humid, moist flow that set up across the East last week will persist through this week, providing fuel for more drenching showers and thunderstorms from Maine through Florida.

Showers and thunderstorms are also extending back into parts of the Ohio and Tennessee valleys, but the number turning heavy and severe will be more localized than those to the east.


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The showers and thunderstorms will be most numerous across the Appalachians and East Coast through Tuesday.

The axis of the heaviest showers and thunderstorms may shift away from the Southeast and southern mid-Atlantic coasts Wednesday through Thursday, focusing from the Florida Panhandle up the spine of the Appalachian Mountains and through the Northeast.

Last week, storms across the East produced widespread flooding and wind damage.

Due to the substantial rainfall in recent days and weeks, it will not take much rainfall from the showers and thunderstorms this week to cause flash flooding. With the ground saturated with water, just an inch of water in less than a three-hour period of time can lead to flash flooding.

This pattern has already yielded the wettest June on record for Philadelphia, Pa., and Wilmington, Del., with other cities, such as New York City, coming within an inch of doing the same. Philadelphia received 10.56 inches of rain during this past June, breaking the old June record of 10.06 inches set in 1938.

In addition to the flooding threat, a localized number of storms may produce gusty winds that can knock over trees and power lines. This can make flooding worse with trees and debris diverting flood waters; causing headaches for travelers and cleanup crews.

A few of the strongest thunderstorms will also drop hail, while an extremely isolated tornado or waterspout touching down cannot be ruled out.

Many residents are likely becoming weary of the seemingly endless rounds of showers and thunderstorms that are not only cause damage, but also interfering with outdoor activities and plans.

Included among these plans will be Fourth of July festivities, as well as the 150th Anniversary Events of the Battle of Gettysburg, Pa.,

Story by AccuWeather.com Meteorologists Brian Lada and Kristina Pydynowski.

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