A cold front along with a robust shortwave trough gradually approached the eastern mid-Atlantic on August 7. A pre-frontal surface trough was also in place. Ahead of the front, a warm and moist air mass built through the day. Strong instability developed, along with moderate wind shear. Convection initially developed along the pre-frontal trough. Later, a squall line associated with the front and trough combination moved through the region. Given the strong instability and adequate shear, numerous storms became severe, primarily producing damaging winds. In addition, low level shear was sufficient to help spawn a couple of brief tornadoes in New Jersey.

Hail in WARREN, NEW JERSEY
From 07-AUG-19 15:27:00 to 07-AUG-19 15:27:00 (EST-5)
Location: PHILLIPSBURG
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MERCER, NEW JERSEY
From 07-AUG-19 13:16:00 to 07-AUG-19 13:16:00 (EST-5)
Location: EAST WINDSOR
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Nickel size hail. Time estimated from radar.

Hail in MONMOUTH, NEW JERSEY
From 07-AUG-19 17:45:00 to 07-AUG-19 17:45:00 (EST-5)
Location: CREAM RIDGE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Photo via social media of hail up to quarter size with coins for reference. Time estimated from radar.

Hail in MONMOUTH, NEW JERSEY
From 07-AUG-19 17:50:00 to 07-AUG-19 17:50:00 (EST-5)
Location: HORNERSTOWN
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Photo of jagged hail as large as half dollar size which reportedly fell for around five minutes.

Hail in BURLINGTON, NEW JERSEY
From 07-AUG-19 16:50:00 to 07-AUG-19 16:50:00 (EST-5)
Location: FORD LNDG
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail up to penny size which lasted for about ten minutes.

Thunderstorm Wind in WARREN, NEW JERSEY
From 07-AUG-19 15:21:00 to 07-AUG-19 15:21:00 (EST-5)
Location: BRASS CASTLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Power lines were downed near the intersection of Warren St and McDonald St. Time estimated from radar.

Thunderstorm Wind in MERCER, NEW JERSEY
From 07-AUG-19 15:23:00 to 07-AUG-19 15:23:00 (EST-5)
Location: PRINCETON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Downed power lines reported in Princeton. Time estimated from radar.

Thunderstorm Wind in MERCER, NEW JERSEY
From 07-AUG-19 15:30:00 to 07-AUG-19 15:30:00 (EST-5)
Location: ROSEDALE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Power lines were downed at Lawrenceville Rd and Province Line Rd. Time estimated from radar.

Thunderstorm Wind in WARREN, NEW JERSEY
From 07-AUG-19 15:32:00 to 07-AUG-19 15:32:00 (EST-5)
Location: PEQUEST
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Several reports of power lines down in the area. Time estimated from radar.

Thunderstorm Wind in MERCER, NEW JERSEY
From 07-AUG-19 15:45:00 to 07-AUG-19 15:45:00 (EST-5)
Location: PRINCETON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A downed tree closed all lanes of US-206 northbound at CR-533. Some flooding also occurred on the roadway. Time estimated from radar.

Thunderstorm Wind in MIDDLESEX, NEW JERSEY
From 07-AUG-19 16:07:00 to 07-AUG-19 16:07:00 (EST-5)
Location: MIDDLESEX
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A downed tree and wires closed NJ-28 in both directions near John F Kennedy Dr. Time estimated from radar.

Thunderstorm Wind in SOMERSET, NEW JERSEY
From 07-AUG-19 16:32:00 to 07-AUG-19 16:32:00 (EST-5)
Location: LIBERTY CORNER
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A downed tree blocked the left lane of I-78 eastbound west of exit 33. Time estimated from radar.

Thunderstorm Wind in MONMOUTH, NEW JERSEY
From 07-AUG-19 16:55:00 to 07-AUG-19 16:55:00 (EST-5)
Location: HIGHLAND BEACH
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A downed tree and wires closed NJ-36 in both directions from CR-8 to Linden Ave. Time estimated from radar.

Thunderstorm Wind in HUNTERDON, NEW JERSEY
From 07-AUG-19 12:34:00 to 07-AUG-19 12:34:00 (EST-5)
Location: FAIRMOUNT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree and wires were downed on Fox Hill Rd. Time estimated from radar.

Thunderstorm Wind in HUNTERDON, NEW JERSEY
From 07-AUG-19 12:38:00 to 07-AUG-19 12:38:00 (EST-5)
Location: CLINTON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Power lines were reported down in the area. Time estimated from radar.

Thunderstorm Wind in HUNTERDON, NEW JERSEY
From 07-AUG-19 12:43:00 to 07-AUG-19 12:43:00 (EST-5)
Location: ANNANDALE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Trees and power lines were reported down in the area. Time estimated from radar.

Thunderstorm Wind in OCEAN, NEW JERSEY
From 07-AUG-19 12:45:00 to 07-AUG-19 12:45:00 (EST-5)
Location: LAKEWOOD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several reports were received of downed trees in the area. Time estimated from radar.

Thunderstorm Wind in HUNTERDON, NEW JERSEY
From 07-AUG-19 12:47:00 to 07-AUG-19 12:47:00 (EST-5)
Location: ALLERTON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Wires were downed on Stanton Lebanon Rd. Time estimated from radar.

Thunderstorm Wind in HUNTERDON, NEW JERSEY
From 07-AUG-19 12:43:00 to 07-AUG-19 12:43:00 (EST-5)
Location: POTTERSVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several trees were downed in the area of Homestead Rd. Time estimated from radar.

Thunderstorm Wind in MONMOUTH, NEW JERSEY
From 07-AUG-19 13:03:00 to 07-AUG-19 13:03:00 (EST-5)
Location: WYCKOFF MILLS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

An mPing report of trees uprooted or snapped. Time estimated from radar.

Thunderstorm Wind in SOMERSET, NEW JERSEY
From 07-AUG-19 12:58:00 to 07-AUG-19 12:58:00 (EST-5)
Location: GLADSTONE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Power lines reported down in Peapack and Gladstone. Time estimated from radar.

Thunderstorm Wind in BURLINGTON, NEW JERSEY
From 07-AUG-19 17:00:00 to 07-AUG-19 17:00:00 (EST-5)
Location: HAINESPORT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Several wires and tree limbs were downed on Hainesport Mount Laurel Rd between Creek Rd and Marne Hwy. Time estimated from radar.

Thunderstorm Wind in CUMBERLAND, NEW JERSEY
From 07-AUG-19 17:30:00 to 07-AUG-19 17:30:00 (EST-5)
Location: FAIRTON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Multiple reports of wires down in the area.

Thunderstorm Wind in CAPE MAY, NEW JERSEY
From 07-AUG-19 18:00:00 to 07-AUG-19 18:00:00 (EST-5)
Location: SOUTH DENNIS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Wires were blown down with a transformer on fire. Fire crews responded.

Tornado in MERCER, NEW JERSEY
From 07-AUG-19 15:33:00 to 07-AUG-19 15:34:00 (EST-5)
Location: WINDSOR
Tornado F-scale: EF0
Reported by: NWS Storm Survey

A weak tornado briefly touched down on the property of Voorhees
Greenhouse in Hightstown, NJ on the afternoon of Wednesday,
August 7. The tornado began near Sharon Road, where several trees
and branches were downed. The most significant damage observed was
to a greenhouse, whose glass roof was shattered. Shards of glass
were blown for hundreds of yards, with many shards also piercing
clean through the doors and walls of a nearby barn. A few metal
support beams from the greenhouse were also tossed up to 200 yards
from their original position, with a number of loose outdoor
objects tossed about in a chaotic, yet circular manner often
consistent with tornadic winds. Eyewitnesses working at the time
reported seeing circulating winds and a possible condensation
funnel as damage to the greenhouse was occurring. The tornado then
passed over a barn, scattering shards of glass, flower planters,
and support beams. Many of these objects were deposited on the
other side of the barn into a nearby field. Several trees
sustained damage to limbs and branches, but all were left upright.
The tornado dissipated as it moved into a clearing beyond the
wooded area. One woman received a minor cut from flying glass, but
thankfully, no serious injuries occurred as a result of this
tornado, which was especially fortunate given the large volume of
broken glass strewn about the impacted property.

Thunderstorm Wind in MONMOUTH, NEW JERSEY
From 07-AUG-19 13:07:00 to 07-AUG-19 13:07:00 (EST-5)
Location: ADELPHIA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

An mPing report of trees uprooted or snapped. Time estimated from radar.

Thunderstorm Wind in MERCER, NEW JERSEY
From 07-AUG-19 13:15:00 to 07-AUG-19 13:15:00 (EST-5)
Location: EAST WINDSOR
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several reports of trees and limbs down in the area.

Thunderstorm Wind in MIDDLESEX, NEW JERSEY
From 07-AUG-19 13:16:00 to 07-AUG-19 13:16:00 (EST-5)
Location: CRANBURY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several tree limbs were reported down in the area. Time estimated from radar.

Thunderstorm Wind in MIDDLESEX, NEW JERSEY
From 07-AUG-19 13:16:00 to 07-AUG-19 13:16:00 (EST-5)
Location: MILLTOWN
Magnitude: 50.00 EG
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree was downed into a house. Time estimated from radar.

Thunderstorm Wind in MIDDLESEX, NEW JERSEY
From 07-AUG-19 13:31:00 to 07-AUG-19 13:31:00 (EST-5)
Location: EDISON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A few trees were downed in Edison. Time estimated from radar.

Thunderstorm Wind in MIDDLESEX, NEW JERSEY
From 07-AUG-19 13:33:00 to 07-AUG-19 13:33:00 (EST-5)
Location: MENLO PARK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tree was split on Calvert Ave. Time estimated from radar.

Thunderstorm Wind in MIDDLESEX, NEW JERSEY
From 07-AUG-19 13:38:00 to 07-AUG-19 13:38:00 (EST-5)
Location: MENLO PARK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A tree was downed on NJ-27 southbound near the Garden State Parkway. Time estimated from radar.

Tornado in CUMBERLAND, NEW JERSEY
From 07-AUG-19 17:40:00 to 07-AUG-19 17:41:00 (EST-5)
Location: MILLVILLE
Tornado F-scale: EF0
Crop damage: 0.00K
Reported by: NWS Storm Survey

A weak tornado briefly touched down in Millville, NJ on
Wednesday evening. The tornado touched down in a field of solar
panels adjacent to the Millville City Sewer Department facility.
Several rows of solar panels sustained damage either from the
tornado or from the falling debris of other panels, with a couple
rows of panels largely destroyed. The tornado continued into a
wooded area next to the solar panels, snapping at least one tree and
damaging a couple others, but lifting soon after it entered the
wooded area. A twisting pattern observed in the damage to the solar
panels was sufficient to determine that the damage was caused by a
tornado. In addition, an eyewitness looking in the direction of the
damage from near the nearby Millville Executive Airport reported a
possible funnel cloud sighting as the storm passed the area. No
injuries occurred as a result of this tornado.

Thunderstorm Wind in WARREN, NEW JERSEY
From 07-AUG-19 15:07:00 to 07-AUG-19 15:07:00 (EST-5)
Location: PHILLIPSBURG
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

A tree was downed on Stonehenge Dr at Lynnfield Terrace. Time estimated from radar.

Thunderstorm Wind in WARREN, NEW JERSEY
From 07-AUG-19 15:07:00 to 07-AUG-19 15:07:00 (EST-5)
Location: LOWER HARMONY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Power lines were downed on Belview Rd and Belvidere Rd. Time estimated from radar.

Thunderstorm Wind in WARREN, NEW JERSEY
From 07-AUG-19 15:10:00 to 07-AUG-19 15:10:00 (EST-5)
Location: STEWARTSVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Power lines were down near Uniontown Rd and Memorial Parkway. Time estimated from radar.

Thunderstorm Wind in WARREN, NEW JERSEY
From 07-AUG-19 15:23:00 to 07-AUG-19 15:23:00 (EST-5)
Location: ANDERSON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Tree downed on Port Murray Rd. Time estimated from radar.