A cold front intersected an extremely unstable airmass. The result was numerous strong to severe thunderstorms containing damaging wind gusts and some hail.

Thunderstorm Wind in WASHINGTON, MARYLAND
From 13-AUG-21 13:48:00 to 13-AUG-21 13:48:00 (EST-5)
Location: (HGR)HAGERSTOWN RGNL
Magnitude: 39.00 MG
Property damage: 1.00K
Reported by: ASOS

A wind gust of 39 knots (45 MPH) was measured by the ASOS at Hagerstown Regional Airport (KHGR). A tree was reported down on southbound I-81 at Showalter Road next to the airport.

Thunderstorm Wind in FREDERICK, MARYLAND
From 13-AUG-21 14:22:00 to 13-AUG-21 14:22:00 (EST-5)
Location: CATOCTIN FURNACE
Magnitude: 40.00 EG
Property damage: 1.00K
Reported by: Department of Highways

A tree was reported down on southbound US-15 Catoctin Mountain Highway at Auburn Road.

Thunderstorm Wind in FREDERICK, MARYLAND
From 13-AUG-21 14:25:00 to 13-AUG-21 14:25:00 (EST-5)
Location: MIDDLETOWN
Magnitude: 50.00 EG
Property damage: 2.00K
Reported by: Fire Department/Rescue

There were several reports of wires blown down near Middletown.

Thunderstorm Wind in FREDERICK, MARYLAND
From 13-AUG-21 14:38:00 to 13-AUG-21 14:38:00 (EST-5)
Location: BRADDOCK HGTS
Magnitude: 50.00 EG
Property damage: 2.00K
Reported by: Department of Highways

Trees blew down on northbound US-40 Baltimore National Pike near Gambrills Park Road.

Thunderstorm Wind in FREDERICK, MARYLAND
From 13-AUG-21 14:47:00 to 13-AUG-21 14:47:00 (EST-5)
Location: MT PLEASANT
Magnitude: 50.00 EG
Property damage: 3.00K
Reported by: Fire Department/Rescue

Wires blew down in the 7600 block of McKaig Road. A tree blew down onto wires on McKaig Road past Allview Drive.

Thunderstorm Wind in FREDERICK, MARYLAND
From 13-AUG-21 14:53:00 to 13-AUG-21 14:53:00 (EST-5)
Location: LIBERTYTOWN
Magnitude: 50.00 EG
Property damage: 2.00K
Reported by: Department of Highways

Trees blew down on southbound MD-75 Walnut Street near Jones Road.

Thunderstorm Wind in CARROLL, MARYLAND
From 13-AUG-21 15:08:00 to 13-AUG-21 15:08:00 (EST-5)
Location: WARFIELDSBURG
Magnitude: 45.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

A tree was reported down in the 1500 block of Bowersox Road.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 13-AUG-21 15:10:00 to 13-AUG-21 15:10:00 (EST-5)
Location: TRAVILAH
Magnitude: 50.00 EG
Property damage: 2.00K
Reported by: Broadcast Media

Trees blew down near the intersection of MD-190 River Road and Travilah Road.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 13-AUG-21 15:15:00 to 13-AUG-21 15:15:00 (EST-5)
Location: NEELSVILLE
Magnitude: 50.00 MG
Reported by: Mesonet

A wind gust of 50 knots (58 MPH) was measured by a mesonet in Germantown.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 13-AUG-21 15:20:00 to 13-AUG-21 15:20:00 (EST-5)
Location: BOYDS
Magnitude: 60.00 EG
Property damage: 25.00K
Reported by: Broadcast Media

Numerous trees blew down near Germantown and Boyds. Numerous trees blew down in the 17000 block of Germantown Road. Several large pine trees snapped and dozens of large tree limbs blew down near the Maryland Soccerplex; soccer goals and Porta Potties blew over. Trees blew down on MD-117 Clopper Road near Mateny Road. A large tree blew down on Central Park Circle at the South Germantown Recreational Park.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 13-AUG-21 15:30:00 to 13-AUG-21 15:30:00 (EST-5)
Location: DAMASCUS
Magnitude: 60.00 EG
Property damage: 10.00K
Reported by: Emergency Manager

Numerous trees and wires blew down in the Damascus and Laytsonville area. Multiple trees blew down near the intersection of MD-94 Annapolis Rock Road and MD-108 Damascus Road. Multiple trees blew down near the intersection of MD-108 Laytonsville Road and MD-650 Damascus Road. A tree blew down near the intersection of MD-124 Woodfield Road and Sweepstakes Road. A tree blew down near the intersection of Hawkins Creamery Road and Woodfield School Road. Wires blew down in the 24800 block of MD-124 Woodfield Road. Wires blew down in the 25900 block of MD-27 Ridge Road. Trees and wires blew down on MD-124 near Greenel Road. Power lines blew down in the unit block of Clearwater Court. Power lines blew down in the 9500 block of Pleasant Plains Road.

Thunderstorm Wind in HOWARD, MARYLAND
From 13-AUG-21 15:37:00 to 13-AUG-21 15:37:00 (EST-5)
Location: FLORENCE
Magnitude: 50.00 EG
Property damage: 2.00K
Reported by: Department of Highways

Trees blew down on MD-94 Woodbine Road near Annapolis Rock Road.

Thunderstorm Wind in HOWARD, MARYLAND
From 13-AUG-21 15:40:00 to 13-AUG-21 15:40:00 (EST-5)
Location: LISBON
Magnitude: 55.00 EG
Property damage: 6.00K
Reported by: 911 Call Center

Numerous trees blew down in the Woodbine area.

Thunderstorm Wind in HOWARD, MARYLAND
From 13-AUG-21 15:45:00 to 13-AUG-21 15:45:00 (EST-5)
Location: DAISY
Magnitude: 60.00 EG
Property damage: 20.00K
Reported by: 911 Call Center

Numerous trees blew down in the Dayton and Glenwood area. Trees blew down near the intersection of McNeal Road and Union Chapel Road. Trees blew down near the intersection of Gared Road and Sharp Road.

Thunderstorm Wind in HOWARD, MARYLAND
From 13-AUG-21 15:45:00 to 13-AUG-21 15:45:00 (EST-5)
Location: WEST FRIENDSHIP
Magnitude: 55.00 EG
Property damage: 10.00K
Reported by: 911 Call Center

Numerous trees blew down in the West Friendship area.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 13-AUG-21 15:45:00 to 13-AUG-21 15:45:00 (EST-5)
Location: KEN GAR
Magnitude: 40.00 EG
Property damage: 1.00K
Reported by: Fire Department/Rescue

Wires were reported down near the intersection of MD-586 Veirs Mill Road and Newport Mill Road causing a fire.

Thunderstorm Wind in HOWARD, MARYLAND
From 13-AUG-21 15:52:00 to 13-AUG-21 15:52:00 (EST-5)
Location: PINE ORCHARD
Magnitude: 50.00 EG
Property damage: 6.00K
Reported by: Department of Highways

Trees blew down near the intersection of US-40 Baltimore National Pike and MD-144 Frederick Road. A large tree blew down near the intersection of Ten Oaks Road and Green Bridge Road. Trees blew down on MD-99 Old Frederick Road near Taylor Farm Road.

Thunderstorm Wind in HOWARD, MARYLAND
From 13-AUG-21 16:00:00 to 13-AUG-21 16:00:00 (EST-5)
Location: CLARKSVILLE
Magnitude: 50.00 EG
Property damage: 5.00K
Reported by: NWS Employee

Several trees blew down in the Columbia area. A tree blew down on Launcelot Lane. Two trees blew down near the intersection of Broken Lane Parkway and Patuxent Woods Drive.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 13-AUG-21 16:04:00 to 13-AUG-21 16:04:00 (EST-5)
Location: FREELAND
Magnitude: 50.00 EG
Property damage: 2.00K
Reported by: Department of Highways

Trees blew down on northbound I-83 at mile marker 35.

Lightning in MONTGOMERY, MARYLAND
From 13-AUG-21 16:10:00 to 13-AUG-21 16:10:00 (EST-5)
Location: WHEATON
Property damage: 20.00K
Reported by: Fire Department/Rescue

A lightning strike caused a fire that burned a shed and fence in the 1900 block of Reedie Drive.

Thunderstorm Wind in HARFORD, MARYLAND
From 13-AUG-21 16:20:00 to 13-AUG-21 16:20:00 (EST-5)
Location: RUTLEDGE
Magnitude: 50.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

A tree blew down on Hess Road near MD-146 Jarresttsville Pike.

Thunderstorm Wind in HARFORD, MARYLAND
From 13-AUG-21 16:29:00 to 13-AUG-21 16:29:00 (EST-5)
Location: PYLESVILLE
Magnitude: 50.00 EG
Property damage: 4.00K
Reported by: Department of Highways

Trees blew down on southbound MD-136 Harkins Road prior to Linkous Road. Trees blew down on MD-24 Rocks Road near Saint Mary's Road.

Thunderstorm Wind in HARFORD, MARYLAND
From 13-AUG-21 16:40:00 to 13-AUG-21 16:40:00 (EST-5)
Location: BEL AIR
Magnitude: 50.00 EG
Property damage: 3.00K
Reported by: Emergency Manager

Several trees and power lines blew down in and around Bel Air. Power lines blew down in the 300 block of Baltimore Pike. A tree blew down near the intersection of Jade Drive and Emerald Drive.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 13-AUG-21 16:43:00 to 13-AUG-21 16:43:00 (EST-5)
Location: BOWIE
Magnitude: 50.00 EG
Property damage: 2.00K
Reported by: Department of Highways

Trees blew down on southbound MD-197 near Race Track Road.

Lightning in HARFORD, MARYLAND
From 13-AUG-21 16:46:00 to 13-AUG-21 16:46:00 (EST-5)
Location: JARRETTSVILLE
Property damage: 10.00K
Reported by: Emergency Manager

A lightning strike blew apart a fire place in the 1400 block of Baldwin Mill Road.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 13-AUG-21 16:50:00 to 13-AUG-21 16:50:00 (EST-5)
Location: LEELAND
Magnitude: 50.00 EG
Property damage: 4.00K
Reported by: Department of Highways

Trees blew down near the intersection of MD-193 Watkins Park Drive and Keverton Drive. Trees blew down on MD-193 Watkins Park Drive near Oak Grove Road.

Thunderstorm Wind in HARFORD, MARYLAND
From 13-AUG-21 16:55:00 to 13-AUG-21 16:55:00 (EST-5)
Location: CARDIFF
Magnitude: 50.00 EG
Property damage: 1.00K
Reported by: Emergency Manager

A tree blew down at mile marker 1 on MD-23 East-West Highway.

Thunderstorm Wind in HARFORD, MARYLAND
From 13-AUG-21 16:55:00 to 13-AUG-21 16:55:00 (EST-5)
Location: JOPPA
Magnitude: 50.00 EG
Property damage: 3.00K
Reported by: Emergency Manager

A tree blew down in the 1400 block of Hollingsworth Road. A branch blew down onto wires causing a fire in the 3000 block of Clayton Road.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 13-AUG-21 17:06:00 to 13-AUG-21 17:06:00 (EST-5)
Location: DAVIDSONVILLE
Magnitude: 50.00 EG
Property damage: 1.00K
Reported by: Broadcast Media

Wires blew down near the intersection of MD-424 Davidsonville Road and MD-214 Central Avenue.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 13-AUG-21 17:15:00 to 13-AUG-21 17:15:00 (EST-5)
Location: WELLS CORNER
Magnitude: 50.00 EG
Property damage: 2.00K
Reported by: Department of Highways

Trees blew down on MD-4 Southern Maryland Boulevard near MD-408 Mount Zion Marlboro Road.

Thunderstorm Wind in CECIL, MARYLAND
From 13-AUG-21 17:15:00 to 13-AUG-21 17:15:00 (EST-5)
Location: CONOWINGO
Magnitude: 50.00 EG
Property damage: 1.00K
Reported by: Department of Highways

A tree blew down on southbound MD-222 Susquehanna River Road near US-1 Conowingo Road.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 13-AUG-21 17:20:00 to 13-AUG-21 17:20:00 (EST-5)
Location: CUMBERSTONE
Magnitude: 50.00 EG
Property damage: 2.00K
Reported by: Department of Highways

Trees blew down on MD-468 Muddy Creek Road near MD-255 Galesville Road.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 13-AUG-21 17:20:00 to 13-AUG-21 17:20:00 (EST-5)
Location: UPPER MARLBORO
Magnitude: 50.00 EG
Property damage: 2.00K
Reported by: Department of Highways

Trees blew down near the intersection of MD-725 Main Street and MD-202 Largo Road.

Thunderstorm Wind in CHARLES, MARYLAND
From 13-AUG-21 17:53:00 to 13-AUG-21 17:53:00 (EST-5)
Location: NEWBURG CLIFFTON ARP
Magnitude: 55.00 EG
Property damage: 15.00K
Reported by: 911 Call Center

Numerous trees and wires were blown down in the Morgantown and Newburg areas. Trees blew down on US-301 Crain Highway near Edge Hill Road.

Thunderstorm Wind in CHARLES, MARYLAND
From 13-AUG-21 17:57:00 to 13-AUG-21 17:57:00 (EST-5)
Location: ISSUE
Magnitude: 50.00 EG
Property damage: 5.00K
Reported by: 911 Call Center

Numerous trees and power lines were blown down in the Cobb Island area.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 13-AUG-21 18:10:00 to 13-AUG-21 18:10:00 (EST-5)
Location: BUDDS CREEK
Magnitude: 55.00 EG
Property damage: 10.00K
Reported by: 911 Call Center

Several trees blew down along Yowaiski Mill Road in Mechanicsville. Trees blew down on MD-238 Maddox Road near Vixen Run Lane. Several trees blew down along MD-5 Point Lookout Road in Leonardtown.

Thunderstorm Wind in BALTIMORE CITY (C), MARYLAND
From 13-AUG-21 16:10:00 to 13-AUG-21 16:10:00 (EST-5)
Location: LEAHIGH
Magnitude: 60.00 EG
Property damage: 500.00K
Reported by: Emergency Manager

A few hundred trees blew down throughout the City of Baltimore. A large tree and several branches were blown down near the intersection of Biltmore Avenue and Pinkey Road.

Thunderstorm Wind in HARFORD, MARYLAND
From 13-AUG-21 16:40:00 to 13-AUG-21 16:40:00 (EST-5)
Location: STREET
Magnitude: 55.00 EG
Property damage: 7.00K
Reported by: Emergency Manager

Numerous trees blew down in and around Street and Pylesville. A tree blew down near the intersection of Coen Road and Rocks Road. A tree blew down onto wires causing a fire on southbound MD-543 Ady Road near Brinegar Road. A tree blew down near the intersection of Whiteford Road and Macton Road. A tree blew down blocking the roadway in the 1100 block of Harkins Road. A tree blew down in the 4900 block of Rocks Road. A tree blew down near the intersection of Saint Paul's Church Road and Telegraph Road.

Thunderstorm Wind in HARFORD, MARYLAND
From 13-AUG-21 16:30:00 to 13-AUG-21 16:30:00 (EST-5)
Location: FALLSTON
Magnitude: 50.00 EG
Property damage: 4.00K
Reported by: Emergency Manager

Several trees blew down in and around Fallston. Trees blew down near the intersection of MD-152 Fallston Road and Carrs Mill Road. A tree blew down on MD-152 Fallston Road near Rochelle Drive. A tree blew down near the intersection of Durham Road and Bellechase Road. A tree blew down in the 2800 block of Pleasantville Road.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 13-AUG-21 18:10:00 to 13-AUG-21 18:10:00 (EST-5)
Location: BUDDS CREEK
Magnitude: 55.00 EG
Property damage: 10.00K
Reported by: 911 Call Center

Several trees blew down along Yowaiski Mill Road in Mechanicsville. Trees blew down on MD-238 Maddox Road near Vixen Run Lane. Several trees blew down along MD-5 Point Lookout Road in Leonardtown.

Thunderstorm Wind in CALVERT, MARYLAND
From 13-AUG-21 18:20:00 to 13-AUG-21 18:20:00 (EST-5)
Location: STOAKLEY
Magnitude: 50.00 EG
Property damage: 6.00K
Reported by: 911 Call Center

Several trees and wires blew down in the Prince Frederick area.