A highly anomalous weather system affected much of the eastern United States on April 13. From the night of April 12 through the day on April 13, strengthening low pressure tracked in an almost due northerly direction from the Ohio Valley, through the Great Lakes, and into Canada. A record strong low level jet developed ahead of it along the East Coast. In the mid-Atlantic, a warm front moved through the region during the morning of the 13th, bringing showery weather. During and after the warm frontal passage, mixing with the low level jet brought destructive wind gusts to the surface, especially near the coast where gusts were enhanced by a well-defined gravity wave.
During the afternoon hours, a strong cold front approached, providing strong forcing to an environment of strong to extreme wind shear. Instability was limited due to a lack of clearing following the morning warm frontal passage. However, enough heating occurred by mid-afternoon that a line of strong to severe thunderstorms did manage to develop, producing a number of damaging wind reports as it moved towards the coast.

High Wind in NORTHWESTERN BURLINGTON, NEW JERSEY
From 13-APR-20 11:48:00 to 13-APR-20 11:48:00 (EST-5)
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The McGuire Air Force Base ASOS (KWRI) measured a 60 mph wind gust. Multiple reports of tree and utility damage were received.

High Wind in CAMDEN, NEW JERSEY
From 13-APR-20 08:20:00 to 13-APR-20 08:20:00 (EST-5)
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tree was downed across a roadway in Haddon Heights.

High Wind in CUMBERLAND, NEW JERSEY
From 13-APR-20 10:20:00 to 13-APR-20 10:20:00 (EST-5)
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Multiple reports of downed trees were received, including on NJ-47 north of Station Rd near Dorchester.

High Wind in GLOUCESTER, NEW JERSEY
From 13-APR-20 11:00:00 to 13-APR-20 11:00:00 (EST-5)
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple large trees were downed throughout Mantua Twp.

High Wind in MIDDLESEX, NEW JERSEY
From 13-APR-20 08:37:00 to 13-APR-20 08:37:00 (EST-5)
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Social media report of large tree limbs downed in Metuchen. Other similar reports received from surrounding areas.

High Wind in MORRIS, NEW JERSEY
From 13-APR-20 08:51:00 to 13-APR-20 08:51:00 (EST-5)
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Multiple reports of tree and utility damage, including a downed tree on I-80 eastbound near Exit 34 in Wharton, which forced lane closures.

High Wind in SALEM, NEW JERSEY
From 13-APR-20 10:30:00 to 13-APR-20 10:30:00 (EST-5)
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A barn was blown off its foundation in Upper Pittsgrove Twp.

High Wind in SOUTHEASTERN BURLINGTON, NEW JERSEY
From 13-APR-20 09:55:00 to 13-APR-20 09:55:00 (EST-5)
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

An mPing report of wind damage was received near Tabernacle. Observations from surrounding areas suggest it is highly likely additional tree damage occurred in the heavily wooded and sparsely populated portions of the area.

High Wind in WARREN, NEW JERSEY
From 13-APR-20 08:40:00 to 13-APR-20 08:40:00 (EST-5)
Magnitude: 50.00 EG
Crop damage: 0.00K
Reported by: Broadcast Media

Several reports of downed trees were received, including one into a home near Phillipsburg.

High Wind in EASTERN OCEAN, NEW JERSEY
From 13-APR-20 11:09:00 to 13-APR-20 11:09:00 (EST-5)
Magnitude: 71.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

An Ocean Prediction Center mesonet gauge on Long Beach Island measured a wind gust of 82 mph. An 81 mph gust was measured 5 miles southeast of Mystic Island. Multiple reports of downed trees and wires were received.

High Wind in WESTERN OCEAN, NEW JERSEY
From 13-APR-20 11:30:00 to 13-APR-20 11:30:00 (EST-5)
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple reports of wind damage were received. Time estimated from numerous measured gusts in the coastal portion of the county.

High Wind in WESTERN ATLANTIC, NEW JERSEY
From 13-APR-20 10:36:00 to 13-APR-20 10:36:00 (EST-5)
Magnitude: 63.00 MG
Crop damage: 0.00K
Reported by: ASOS

A 73 mph wind gust was measured at Atlantic City International Airport. Several reports of tree, utility, and property damage were received from the area.

High Wind in EASTERN ATLANTIC, NEW JERSEY
From 13-APR-20 10:19:00 to 13-APR-20 10:19:00 (EST-5)
Magnitude: 55.00 MG
Crop damage: 0.00K
Reported by: Mesonet

A mesonet site in Brigantine measured a 63 mph wind gust. Some stronger gusts likely occurred based on observations from surrounding areas. Tree, utility, and property damage was reported.

High Wind in WESTERN CAPE MAY, NEW JERSEY
From 13-APR-20 09:15:00 to 13-APR-20 09:15:00 (EST-5)
Magnitude: 70.00 EG
Crop damage: 0.00K
Reported by: Public

The most severe damage from this regional high wind event was observed in Cape May County. A few measured gusts of 60 to 65 kt were observed but some stronger gusts likely occurred. Numerous reports of damage were received. Multiple buildings suffered total or near total loss of roofing in and near Cape May. At least one brick chimney was blown down and a garage blown off its foundation in Villas. Numerous downed trees and power lines were reported.

High Wind in EASTERN CAPE MAY, NEW JERSEY
From 13-APR-20 09:52:00 to 13-APR-20 09:52:00 (EST-5)
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

A 72 mph wind gust was measured by a HADS gauge at Cape May Harbor. Numerous reports of tree, utility, and property damage were received.