A slow moving backdoor cold front drifted southwest through the mid-Atlantic region on July 6. Meanwhile, a shortwave vorticity impulse, one of several in a series, moved across the region during the day. A very hot and humid air mass was present ahead of the backdoor cold front, leading to the development of strong to extreme instability over the region. The approaching upper level disturbance allowed for the development of moderate wind shear over the region. Combined with the front, it also acted as a trigger mechanism for convection. Severe thunderstorms developed by early afternoon over eastern PA and southern and central New Jersey. These storms produced strong outflow boundaries which served to initiate additional severe convection. The result was a ring of fire in which outflow steadily propagated outward in all directions. This caused severe weather to spread radially outward from its origin near Philadelphia to much of New Jersey, other portions of eastern Pennsylvania, and Delmarva.

Thunderstorm Wind in KENT, DELAWARE
From 06-JUL-20 19:18:00 to 06-JUL-20 19:18:00 (EST-5)
Location: HOLLANDSVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Power lines were downed near Park Brown Rd near Sandtown. Time estimated from radar.

Thunderstorm Wind in KENT, DELAWARE
From 06-JUL-20 19:20:00 to 06-JUL-20 19:20:00 (EST-5)
Location: HOLLANDSVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Trees and wires were downed to the north and west of Harrington. Time estimated from radar.

Thunderstorm Wind in SUSSEX, DELAWARE
From 06-JUL-20 20:00:00 to 06-JUL-20 20:00:00 (EST-5)
Location: CONCORD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

A tree and power lines were downed near Holley Valley Rd in Seaford. Time estimated from radar.

Thunderstorm Wind in SUSSEX, DELAWARE
From 06-JUL-20 20:03:00 to 06-JUL-20 20:03:00 (EST-5)
Location: CONCORD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Wires were downed on Concord Pond Rd. Time estimated from radar.

Thunderstorm Wind in SUSSEX, DELAWARE
From 06-JUL-20 20:03:00 to 06-JUL-20 20:03:00 (EST-5)
Location: BRIDGEVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

A tree limb and power lines were downed near Ritchie Ln in Bridgeville. Time estimated from radar.

Thunderstorm Wind in SUSSEX, DELAWARE
From 06-JUL-20 19:46:00 to 06-JUL-20 19:46:00 (EST-5)
Location: GREENWOOD
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Lightning in SUSSEX, DELAWARE
From 06-JUL-20 19:45:00 to 06-JUL-20 19:45:00 (EST-5)
Location: BRIDGEVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A structure fire due to a lightning strike was reported on Amandas Teal Dr.

Thunderstorm Wind in NEW CASTLE, DELAWARE
From 06-JUL-20 16:50:00 to 06-JUL-20 16:50:00 (EST-5)
Location: MILFORD XRDS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tree limbs and wires were downed near Pleasant Hill Rd in Newark. Time estimated from radar.

Thunderstorm Wind in NEW CASTLE, DELAWARE
From 06-JUL-20 18:00:00 to 06-JUL-20 18:00:00 (EST-5)
Location: ODESSA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tree limbs and wires were downed near Brick Mill Rd and Dove Run Blvd in Odessa. Time estimated from radar.