After a significant heatwave, a cold front approached the mid-Atlantic on July 1, 2021. A potent mid-level trough was also digging southward through southern Ontario and into the Great Lakes region, and a strong upper level jet streak was present downstream the trough axis, over the interior mid-Atlantic and northern New England. This strong upper level forcing combined with the approaching front and a lingering warm, moist air mass ahead of it caused widespread thunderstorm development on July 1. Storms occurred almost exclusively south of Interstate 78, in the environment of best instability. A number of storms became severe, taking the form of mainly linear and multi-cellular clusters but with some embedded supercellular characteristics. Straight line wind damage was the primary hazard, with a number of reports of downed trees and power outages due to winds. With the cold front remaining to the west, some storm activity continued into the overnight, but storm coverage and intensity gradually waned with the loss of daytime heating and the overturning of the atmosphere from earlier storms.

Thunderstorm Wind in CAROLINE, MARYLAND
From 01-JUL-21 15:30:00 to 01-JUL-21 15:30:00 (EST-5)
Location: FEDERALSBURG
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Trees and wires were down along MD-313 near Old Denton Rd. Time estimated from radar.

Thunderstorm Wind in CAROLINE, MARYLAND
From 01-JUL-21 15:19:00 to 01-JUL-21 15:19:00 (EST-5)
Location: MARYDEL
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Several reports of downed tree limbs and wires between Marydel and Hartly. Time estimated from radar.

Thunderstorm Wind in CAROLINE, MARYLAND
From 01-JUL-21 15:21:00 to 01-JUL-21 15:21:00 (EST-5)
Location: FEDERALSBURG
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Several reports of downed power lines and numerous power outages in the Federalsburg area. Time estimated from radar.

Thunderstorm Wind in CAROLINE, MARYLAND
From 01-JUL-21 15:35:00 to 01-JUL-21 15:35:00 (EST-5)
Location: HICKMAN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Trees and wires were down along MD-404 and Breeding Rd. Time estimated from radar.

Thunderstorm Wind in QUEEN ANNE'S, MARYLAND
From 01-JUL-21 15:00:00 to 01-JUL-21 15:00:00 (EST-5)
Location: STEVENSVILLE BAY ARP
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Trees and utility wires were down with debris on the roadway along MD-8 south of Kent Manor Dr. Time estimated from radar.

Thunderstorm Wind in QUEEN ANNE'S, MARYLAND
From 01-JUL-21 15:24:00 to 01-JUL-21 15:24:00 (EST-5)
Location: CENTREVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Several reports of downed wires near Centreville. Time estimated from radar.

Thunderstorm Wind in QUEEN ANNE'S, MARYLAND
From 01-JUL-21 21:50:00 to 01-JUL-21 21:50:00 (EST-5)
Location: SUDLERSVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Multiple downed trees were reported near Sudlersville. Time estimated from radar.

Thunderstorm Wind in CAROLINE, MARYLAND
From 01-JUL-21 15:35:00 to 01-JUL-21 15:35:00 (EST-5)
Location: DENTON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Wires were downed in the Denton area. Time estimated from radar.

Thunderstorm Wind in QUEEN ANNE'S, MARYLAND
From 01-JUL-21 15:35:00 to 01-JUL-21 15:35:00 (EST-5)
Location: BURRISVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Trees and wires were down with debris along MD-213 near Hatchett Rd. Time estimated from radar.

Thunderstorm Wind in TALBOT, MARYLAND
From 01-JUL-21 15:16:00 to 01-JUL-21 15:16:00 (EST-5)
Location: LONGWOODS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Multiple trees were down between Wye Mills and Easton. Time estimated from radar.