Watch Issued: Severe Thunderstorms, Flooding Rain a Continued East Coast Threat Friday

Linda Lam
Published: July 14, 2017

Severe thunderstorms and flooding rainfall will continue to be a threat in parts of the mid-Atlantic Friday, continuing a siege that has plagued parts of the Midwest and Northeast much of this week.

(MORE: Tornado Central | View National Interactive Radar Map)

NOAA's Storm Prediction Center has issued a severe thunderstorm watch valid until 9 pm EDT for parts of southern New Jersey, northeastern Virginia, eastern Maryland and southern Delaware. 

Current Radar, Watches and Warnings.

Severe thunderstorms caused straight-line wind damage on the western side of Philadelphia on Friday afternoon. Car windows were damaged in West Chester, Pennsylvania.

Scattered pockets of wind damage were reported southwest from Philadelphia into western North Carolina. A tree fell onto a metro car near Dunn Loring, Virginia. Widespread damage was reported across Fairfax County, Virginia, mainly due to straight-line winds and broken tree limbs. Trees were also reported to be downed onto power lines in the Grottoes area of Virginia.

Flash flooding was the primary story Thursday. Hundreds of basements were reportedly flooded in central Indiana County, Pennsylvania, about 45 miles east-northeast of Pittsburgh

Flooding also swamped parts of New York state, New Jersey, southern New England, Ohio, Indiana and Missouri. For a summary of Friday's reports, scroll down to our Friday recap section.

(LATEST NEWS: Storms Pummel Midwest, Northeast With Rain, Triggering Widespread Flash Flooding)

Below is our latest forecast thinking on the timing and magnitude of the severe threats through Friday.

Severe Weather Forecast

Friday Evening

  • Forecast: Scattered severe thunderstorms are most probable in the early evening in the mid-Atlantic states from southern Pennsylvania to eastern Virginia, the Delmarva peninsula and far northern North Carolina.
  • Threats: Damaging wind gusts will be the main threat, but an isolated tornado can't be ruled out. Once again, flash flooding is also possible where thunderstorms or thunderstorm clusters stall for a period of an hour or more, particularly over mountainous terrain.
  • Cities: Philadelphia | Baltimore | Washington D.C.

Friday Evening's Thunderstorm Outlook

Recap: Flash Flooding in the Northeast and Ohio Valley Thursday

Flash flooding led to numerous road closures in and around the city of Buffalo, New York, Thursday morning after nearly two inches of rain fell in just two hours. Motorists became stranded, and some water rescues took place.

Localized areas of flooding lingered in the Buffalo area into Thursday afternoon, and a home water rescue was necessary near Marilla, New York, some 20 miles east of Buffalo.

Homes and businesses were flooded in Columbus, Ohio, as the second heavy rain event in four days swamped the capital city. Flash flooding was also reported on the north side of Bellefontaine, Ohio. Numerous roads were closed there including Route 68. 

Flooding of the Blanchard River in Findlay, Ohio, was expected to crest Friday at its highest level in almost 10 years.

Early Thursday morning, heavy rain resulted in flooding along Interstate 475 in Flint and Genesee, Michigan, with water up to three feet in some areas. Roads also flooded in Findlay, Ohio, leaving motorists stranded.

Recap: Severe Storms and Flooding in Midwest, Northeast Wednesday

Wednesday evening, hail was reported in Camp Douglas, Wisconsin, as severe storms tracked across central Wisconsin.

Flash flooding was reported in several locations in eastern and central Massachusetts Wednesday afternoon and evening. Cars got stuck on some roads as they became engulfed in six-plus inches of standing water.

Many roads were deemed impassable in Somerville, Massachusetts. Up to two feet of floodwater was reported in portions of Agawam, Massachusetts, directly across the Connecticut River from Springfield.

Wednesday morning, flash flooding was a major problem from northeast Iowa into southeast Wisconsin and northern Illinois.

A flash flood emergency was issued for parts of the northern suburbs of Chicagoland. Hardest hit were Lake, McHenry and Kane counties. Roads and houses were reportedly flooded after 5 to 8 inches of rain swamped the area. Heavy rain late Wednesday morning left up to 6 inches of standing water on parts of Lakeshore Drive.

The Des Plaines River in Gurnee, Illinois, is forecast to crest above its previous Sept. 1986 record crest early Saturday. As the crest moves downstream, homes may be threatened in Des Plaines, where a record crest is also forecast Saturday morning, and in the River Forest/Maywood area.

(NEWS: Local State of Emergency Declared After Flash Flooding)

Businesses were flooded and cars were stranded in Elkhorn, Wisconsin. Parts of Kenosha County experienced flooding for the second time in 48 hours early Wednesday, prompting water rescues. Manhole covers were seen popping due to storm water runoff in Waukesha, and a dam in East Troy was slightly overtopped. Roads were washed out near Browns Lake and Cassville, Wisconsin.

Evacuations were prompted early Wednesday near Osterdock, Iowa, due to a pair of swollen rivers and creeks. Over 8 inches of rain washed out numerous roads in southern Clayton County, Iowa. Flash flooding and wind gusts to 75 mph plagued parts of the city of Dubuque, as well.

Recap: Severe Storms in the Northern Plains and Midwest Tuesday

Among Tuesday's severe thunderstorms, a photogenic, multi-vortex tornado was spawned by a long-lived supercell thunderstorm southwest of Grand Forks, North Dakota.

(MORE: Here's Why There's More Than One Type of Tornado)

The parent supercell spawning this tornado tracked across eastern North Dakota and northwest Minnesota for over four hours, also producing straight-line wind gusts up to 80 mph and hail up to two inches in diameter.

A tornado was also reported in eastern Iowa by a trooper who caught visual while flying in an airplane. The tornado was rated EF1, after a National Weather Service storm survey Wednesday.

Recap: Severe Storms, Flash Flooding in the Ohio Valley Monday

Tornadoes were reported Monday evening near Stockdale, Indiana, near Deacon, Indiana, near Roann, Indiana, and near Andrews, Indiana. Debris was observed from additional possible tornadoes near Miami, Indiana, and near Lincolnville, Indiana.

Hanna City, Illinois, clocked a 70-mph wind gust Monday evening as severe storms rumbled through.

(NEWS: Severe Storms Batter Midwest, Plains

Monday afternoon, an 18-inch diameter tree branch was downed by strong thunderstorm winds on the Ohio State University campus in Columbus, Ohio.

There were also reports of up to 12 inches of standing water on some roads in the area as the thunderstorms produced torrential rainfall. Interstate 71 had to be closed at 5th Avenue just north of downtown Columbus due to flooding on the highway.

Strong thunderstorm winds knocked down numerous trees and power lines in Murray City, Ohio, cutting off power to the village Monday afternoon.

Recap: Severe Storms, Flash Flooding in the Upper Midwest Sunday, Sunday Night

At least one tornado appeared to have touched down Sunday evening in Blue Earth County, Minnesota, north of Lake Crystal. Multiple reports of 4-inch diameter hail were received from Sibley and Nicollet counties. One home's roof was damaged in Waterville, Minnesota, while trees and power lines were downed near the town of Good Thunder.

Sunday night, flash flooding stranded some vehicles in parts of the city of Madison, Wisconsin, and flooding of some buildings was reported from over 5 inches of rain in Kenosha, Wisconsin.

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MORE: Severe Storms in the Midwest, Northeast July 7, 2017

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