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 CECIL, MARYLAND
From 06-JUL-20 17:39:00 to 06-JUL-20 17:39:00 (EST-5)
Location: PORT DEPOSIT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

MD-222 eastbound at Happy Valley Rd in Port Deposit was closed due to storm debris. Time estimated from radar.

Thunderstorm Wind in CECIL, MARYLAND
From 06-JUL-20 17:40:00 to 06-JUL-20 17:40:00 (EST-5)
Location: NORTH EAST
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

MD-272 was closed at Hance Point Rd due to storm debris. Time estimated from radar.

Thunderstorm Wind in CECIL, MARYLAND
From 06-JUL-20 17:40:00 to 06-JUL-20 17:40:00 (EST-5)
Location: CHARLESTOWN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

MD-7 was closed in both directiosn at Louisa Ln due to storm debris. Time estimated from radar.

Thunderstorm Wind in KENT, MARYLAND
From 06-JUL-20 18:19:00 to 06-JUL-20 18:19:00 (EST-5)
Location: FAIRLEE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

MD-20 westbound at Bell Rose Ln was closed due to storm debris. Time estimated from radar.

Thunderstorm Wind in KENT, MARYLAND
From 06-JUL-20 18:20:00 to 06-JUL-20 18:20:00 (EST-5)
Location: CHESTERTOWN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

MD-20 westbound was closed at MD-446 due to storm debris. Time estimated from radar.

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

Trees and wires were downed near the intersection of Massey Rd and Golts Rd. Time estimated from radar.

Thunderstorm Wind in QUEEN ANNE'S, MARYLAND
From 06-JUL-20 18:23:00 to 06-JUL-20 18:23:00 (EST-5)
Location: BURRISVILLE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management surveyed storm damage in this area. Some sporadic snapped trees were found along Lands End Rd, especially between Jack Elliot Way and Bookers What Rd, then southeastward towards Church Hill Rd between Church Hill and Centreville. Damage was found to be consistent with straight line winds. Time estimated from radar.

Thunderstorm Wind in QUEEN ANNE'S, MARYLAND
From 06-JUL-20 18:28:00 to 06-JUL-20 18:28:00 (EST-5)
Location: CRUMPTON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

MD-290 was closed in both directions near Front St due to storm debris. Time estimated from radar.

Thunderstorm Wind in QUEEN ANNE'S, MARYLAND
From 06-JUL-20 18:30:00 to 06-JUL-20 18:30:00 (EST-5)
Location: CENTREVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

MD-304 was closed near US-301 due to storm debris. Time estimated from radar.

Thunderstorm Wind in QUEEN ANNE'S, MARYLAND
From 06-JUL-20 18:35:00 to 06-JUL-20 18:35:00 (EST-5)
Location: CENTREVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Trees were downed near and around Centreville.

Thunderstorm Wind in CAROLINE, MARYLAND
From 06-JUL-20 18:44:00 to 06-JUL-20 18:44:00 (EST-5)
Location: BALTIMORE CORNER
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

MD-313 was closed in both directions from Hollingsworth Circle to Jones Rd due to storm debris. Time estimated from radar.

Thunderstorm Wind in QUEEN ANNE'S, MARYLAND
From 06-JUL-20 18:44:00 to 06-JUL-20 18:44:00 (EST-5)
Location: ROMANCOKE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

MD-8 was closed at Dorchester Rd due to storm debris. Time estimated from radar.

Thunderstorm Wind in TALBOT, MARYLAND
From 06-JUL-20 18:50:00 to 06-JUL-20 18:50:00 (EST-5)
Location: WILLOUGHBY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees were downed on Sparkie Ln in Queen Anne. Time estimated from radar.

Thunderstorm Wind in TALBOT, MARYLAND
From 06-JUL-20 19:01:00 to 06-JUL-20 19:01:00 (EST-5)
Location: UNIONVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Unionville Rd was closed at Todds Corner Rd due to storm debris. Time estimated from radar.

Thunderstorm Wind in TALBOT, MARYLAND
From 06-JUL-20 19:05:00 to 06-JUL-20 19:05:00 (EST-5)
Location: EASTON ARPT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

MD-309 was closed at Black Dog Alley due to storm debris. Time estimated from radar.

Thunderstorm Wind in TALBOT, MARYLAND
From 06-JUL-20 19:15:00 to 06-JUL-20 19:15:00 (EST-5)
Location: KIRKHAM
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree fell into a building on Travelers Rest Circle. Time estimated from radar.

Thunderstorm Wind in TALBOT, MARYLAND
From 06-JUL-20 19:17:00 to 06-JUL-20 19:17:00 (EST-5)
Location: KIRKHAM
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree fell into a structure on St. Michael's Rd. Time estimated from radar.

Thunderstorm Wind in TALBOT, MARYLAND
From 06-JUL-20 19:28:00 to 06-JUL-20 19:28:00 (EST-5)
Location: TRAPPE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

MD-565 northbound past Backtown Rd in Trappe was closed due to storm debris. Time estimated from radar.

Thunderstorm Wind in KENT, MARYLAND
From 06-JUL-20 18:12:00 to 06-JUL-20 18:12:00 (EST-5)
Location: FAIRLEE
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Measured at Tolchester Beach, station TCBM2.

Thunderstorm Wind in CAROLINE, MARYLAND
From 06-JUL-20 18:54:00 to 06-JUL-20 18:54:00 (EST-5)
Location: GOLDSBORO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Video received via social media from this location of winds which appeared to be at least 60 mph. Time estimated from radar.