Weekend Severe Weather: Chicago to NYC, Philly

By Brian Edwards, Meteorologist
August 04, 2012; 9:52 AM
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Photo courtesy of Photos.com.

A stormy weekend is on tap from the Great Lakes to the Northeast, with multiple rounds of severe weather expected.

The same disturbance and cold front responsible for severe weather in the northern Plains Friday will shift eastward this weekend, sending the severe weather threat into populated areas of the East.

Expert Senior Meteorologist Alex Sosnowski hinted that "The area from central Iowa to eastern Wisconsin, including Des Moines, Minneapolis and Madison, Wis., could be in the crosshairs of the nasty storms during Saturday. Ominous storms could be in the vicinity of Chicago Saturday evening."

Saturday Severe Storms

Thunderstorms were ongoing early Saturday morning over parts of Iowa and Wisconsin leftover from the severe weather of Friday night.

These storms will quickly weaken and the sun will break out over cities such as Madison, Chicago, Peoria and Grand Rapids. This will lead to the development of a very volatile atmosphere.

As the cold front approaches from the west, it will provide the added lift needed for another round of severe weather during the afternoon and evening hours. The threat will develop first in Racine, Milwaukee, Rockford and Chicago during the afternoon before shifting eastward overnight into cities such as Indianapolis, Kalamazoo and eventually Detroit.

Lines of storms are expected to form in the region mentioned above, leading to a threat of wind gusts over 60 mph and hail to the size of tennis balls. An isolated tornado or two is possible, but wind damage will be the biggest story.

Heading into Saturday night, one or more complexes of thunderstorms could race across the Great Lakes bringing a threat for widespread wind damage and potentially flooding downpours.

Thunderstorms may last through much of Saturday night as they spread into northern Ohio and parts of southern Ontario.

Sunday Threat Shifts East

Sunday, the severe weather potential shifts into highly populated zones of the mid-Atlantic and Northeast as the cold front continues to track eastward.

Severe storms during the late-morning and afternoon will affect cities and towns from Syracuse through Erie, Pittsburgh and Nashville.

This far east, the biggest threat appears to be damaging wind gusts which can knock down trees and power lines.

Storms Sunday night could organize into one or two complexes as they track toward the I-95 corridor, bringing the damaging wind threat to Worcester, New York City, Philadelphia and Dover.

Stay tuned to AccuWeather.com over the weekend for more information as this severe weather outbreak unfolds. Also, check out the AccuWeather.com Severe Weather Center.

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