A strong cold front intersected a very hot, humid, and unstable airmass across the Mid-Atlantic shortly after peak heating. Aided by dynamics and moderately strong shear from an approaching upper-level trough, the front spawned bands of thunderstorms that produced considerable wind damage particularly in the I-95 corridor. Some areas saw the worst thunderstorm-driven wind speeds and damage since the derecho in June 2012, though the area affected by the highest magnitude of winds was not nearly as large.

Thunderstorm Wind in CHARLES, MARYLAND
From 29-JUL-23 16:55:00 to 29-JUL-23 17:00:00 (EST-5)
Location: PISGAH
Magnitude: 61.00 EG
Property damage: 100.00K
Reported by: Trained Spotter

Ripley Road was closed and impassable due to numerous trees that blew down in the roadway.

Thunderstorm Wind in CHARLES, MARYLAND
From 29-JUL-23 16:55:00 to 29-JUL-23 17:05:00 (EST-5)
Location: ST CHARLES
Magnitude: 70.00 EG
Property damage: 5.00M
Reported by: Emergency Manager

Hundreds of trees, branches and wires blew down southeast of Saint Charles, between Waldorf and La Plata, and in Marbury. Many of the trees blew down onto houses.

Thunderstorm Wind in CHARLES, MARYLAND
From 29-JUL-23 17:00:00 to 29-JUL-23 17:05:00 (EST-5)
Location: HUGHESVILLE
Magnitude: 61.00 EG
Property damage: 1.00M
Reported by: Emergency Manager

Dozens of trees blew down between White Plains and Hughesville, including several onto houses.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 29-JUL-23 15:05:00 to 29-JUL-23 15:10:00 (EST-5)
Location: GOSHEN
Magnitude: 61.00 EG
Property damage: 250.00K
Reported by: Emergency Manager

Dozens of trees, branches and wires blew down near Germantown and Montgomery Village. A tree blew down onto a utility pole near the 22600 block of Wildcat Road. Multiple trees blew down near the intersection of Goshen Road and Wightman Road. Trees blew down on MD-355 Frederick Road at MD-118 Germantown Road.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 29-JUL-23 15:10:00 to 29-JUL-23 15:10:00 (EST-5)
Location: EDNOR
Magnitude: 56.00 EG
Property damage: 100.00K
Reported by: Emergency Manager

Trees, power lines, and transformers blew down along MD-182 Layhill Road between Chester Mill Road and MD-28 Norbeck Road.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 29-JUL-23 15:15:00 to 29-JUL-23 15:15:00 (EST-5)
Location: POTOMAC
Magnitude: 52.00 EG
Property damage: 10.00K
Reported by: Emergency Manager

Numerous trees blew down in the Potomac area.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 29-JUL-23 15:19:00 to 29-JUL-23 15:19:00 (EST-5)
Location: MONKTON
Magnitude: 52.00 EG
Property damage: 3.00K
Reported by: Emergency Manager

Trees and wires blew down on MD-138 Shepperd Road between Monkton Road and Wesley Chapel Road.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 29-JUL-23 17:10:00 to 29-JUL-23 17:30:00 (EST-5)
Location: OAKS
Magnitude: 70.00 EG
Property damage: 5.00M
Reported by: Emergency Manager

Hundreds of trees blew down around Charlotte Hall, Golden Beach, and Mechanicsville. Many trees blew down onto houses and cars. Numerous trees blew down along Golden Beach Road and on northbound MD-5 Leonardtown Road near Charlotte Hall and Golden Beach. Numerous trees blew down on MD-6 New Market Turner Road between Four Seasons Court and Flora Corner Road. Large trees blew down near the intersection of MD-6 New Market Turner Road and Lockes Hill Road. Dozens of trees blew down around Mechanicsville, with one trapping a sherriff.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 29-JUL-23 18:20:00 to 29-JUL-23 18:20:00 (EST-5)
Location: CHAPTICO
Magnitude: 61.00 EG
Property damage: 250.00K
Reported by: Emergency Manager

Dozens of trees, branches, wires and poles blew down around Chaptico and Morganza to near Mechanicsville. Numerous trees blew down along MD-236 Thompson Corner Road, Mechanicsville Road, and Baptist Church Road.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 29-JUL-23 18:44:00 to 29-JUL-23 18:44:00 (EST-5)
Location: LEONARDTOWN
Magnitude: 52.00 EG
Property damage: 2.00K
Reported by: Emergency Manager

Trees blew down across Cedar Lane Road near Blacksmith Shop Road.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 29-JUL-23 18:54:00 to 29-JUL-23 18:54:00 (EST-5)
Location: CALIFORNIA
Magnitude: 52.00 EG
Property damage: 5.00K
Reported by: Emergency Manager

Trees blew down around California.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 29-JUL-23 15:25:00 to 29-JUL-23 15:40:00 (EST-5)
Location: BETHESDA
Magnitude: 65.00 EG
Property damage: 2.00M
Reported by: Broadcast Media

Dozens of trees, branches and wires blew down near Glen Echo and Cabin John. Numerous trees blew down onto power lines. Cabin John Parkway, Clara Barton Parkway, and Macarthur Boulevard remained closed for several days due to downed trees. A tree blew down onto a house in the 6000 block of Cromwell Drive. Trees blew down on eastbound MD-190 River Road at Whittier Boulevard. Trees blew down on eastbound MD-614 Goldsboro Road at Wedgewood Road.

Thunderstorm Wind in HOWARD, MARYLAND
From 29-JUL-23 15:25:00 to 29-JUL-23 15:30:00 (EST-5)
Location: EAST LIOAK
Magnitude: 56.00 EG
Property damage: 10.00K
Reported by: Trained Spotter

Several trees blew down in and near Columbia, including along Harpers Farm Road, Cedar Lane, and Homewood Road.

Thunderstorm Wind in HOWARD, MARYLAND
From 29-JUL-23 15:25:00 to 29-JUL-23 15:35:00 (EST-5)
Location: SAVAGE
Magnitude: 61.00 EG
Property damage: 100.00K
Reported by: Department of Highways

Dozens of large trees and branches blew down between Jessup and Savage. Numerous trees blew down on northbound US-1 Washington Boulevard at Corridor Road. Numerous large trees and branches blew down on Vollmerhausen Road between the Little Patuxent River and Savage Guilford Road, and along Foundry Street. Trees blew down on US-1 Washington Boulevard at Whiskey Bottom Road.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 29-JUL-23 19:15:00 to 29-JUL-23 19:15:00 (EST-5)
Location: PATUXENT RIVER
Magnitude: 52.00 MG
Reported by: ASOS

A wind gust of 52 knots (60 MPH) was measured by the ASOS at Patuxent River Naval Air Station (KNHK).

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 29-JUL-23 20:25:00 to 29-JUL-23 20:25:00 (EST-5)
Location: VALLEY LEE
Magnitude: 60.00 MG
Property damage: 25.00K
Reported by: Mesonet

A wind gust of 60 knots (69 MPH) was measured by a Tempest station on Trinity Church Road. Numerous trees blew down in the area, including near the intersection of MD-5 Point Lookout Road and Bauer Road.

Thunderstorm Wind in HOWARD, MARYLAND
From 29-JUL-23 15:28:00 to 29-JUL-23 15:28:00 (EST-5)
Location: OAKLAND MILLS
Magnitude: 52.00 EG
Property damage: 5.00K
Reported by: Department of Highways

Trees blew down on southbound US-29 Columbia Pike at Exit 21A/southbound MD-108 Clarksville Pike. Trees blew down on MD-175 Rouse Parkway/Little Patuxent Parkway at US-29 Columbia Pike.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 29-JUL-23 15:30:00 to 29-JUL-23 15:30:00 (EST-5)
Location: EMERY CORNERS
Magnitude: 53.00 MG
Reported by: Mesonet

A wind gust of 53 knots (61 MPH) was measured by a mesonet in Cabin John (FW3819).

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 29-JUL-23 15:39:00 to 29-JUL-23 15:39:00 (EST-5)
Location: GREENBELT
Magnitude: 52.00 EG
Property damage: 2.00K
Reported by: Department of Highways

Trees blew down onto southbound MD-295 Baltimore-Washington Parkway prior to MD-193 Greenbelt Road.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 29-JUL-23 15:39:00 to 29-JUL-23 15:39:00 (EST-5)
Location: KINGSVILLE
Magnitude: 52.00 EG
Property damage: 2.00K
Reported by: Department of Highways

Trees blew down on US-1 Belair Road at New Cut Road.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 29-JUL-23 15:43:00 to 29-JUL-23 15:43:00 (EST-5)
Location: COLLINGTON
Magnitude: 50.00 MG
Property damage: 20.00K
Reported by: Trained Spotter

A wind gust of 50 knots (58 MPH) was measured by a mesonet at Kenilworth Elementary School (BOWIE). Numerous trees and large branches blew down in the area, including near the intersection of MD-197 Laurel-Bowie Road and Old Chapel Road. Trees blew down on Madelay Lane at Melody Turn, and Marn Street at Moylan Street.

Thunderstorm Wind in HARFORD, MARYLAND
From 29-JUL-23 15:45:00 to 29-JUL-23 16:00:00 (EST-5)
Location: EDGEWOOD
Magnitude: 61.00 EG
Property damage: 500.00K
Reported by: 911 Call Center

Dozens of trees, branches and wires blew down in the Edgewood area, including several onto cars and houses.

Thunderstorm Wind in HARFORD, MARYLAND
From 29-JUL-23 15:50:00 to 29-JUL-23 15:50:00 (EST-5)
Location: ABINGDON
Magnitude: 52.00 EG
Property damage: 2.00K
Reported by: Department of Highways

Trees blew down on US-40 Pulaski Highway at Abingdon Road.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 29-JUL-23 15:50:00 to 29-JUL-23 16:00:00 (EST-5)
Location: CROWNSVILLE
Magnitude: 70.00 EG
Property damage: 1.00M
Reported by: Department of Highways

Numerous trees blew down on MD-450 Defense Highway at Pebblebrook Court, MD-424 Davidsonville Road at US-50 John Hanson Highway, and MD-178 Generals Highway prior to Herald Harbor Road.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 29-JUL-23 16:05:00 to 29-JUL-23 16:25:00 (EST-5)
Location: TEMPLE HILLS
Magnitude: 56.00 EG
Property damage: 50.00K
Reported by: Department of Highways

Numerous trees blew down along southbound I-95/I-495 Capital Beltway Inner Loop near Exit 4B/MD-414 Saint Barnabas Road.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 29-JUL-23 16:18:00 to 29-JUL-23 16:18:00 (EST-5)
Location: ACCOKEEK
Magnitude: 52.00 EG
Property damage: 2.00K
Reported by: Department of Highways

Trees blew down on southbound MD-210 Indian Head Highway at MD-228 Berry Road.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 29-JUL-23 16:24:00 to 29-JUL-23 16:24:00 (EST-5)
Location: WESTPHALIA
Magnitude: 52.00 EG
Property damage: 2.00K
Reported by: Department of Highways

Trees blew down on eastbound MD-4 Pennsylvania Avenue/Stephanie Roper Highway at MD-717 Water Street.

Thunderstorm Wind in CECIL, MARYLAND
From 29-JUL-23 16:30:00 to 29-JUL-23 16:30:00 (EST-5)
Location: CECILTON
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

Tree damage was reported southeast of Cecilton, including along Budds Landing Road.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 29-JUL-23 15:03:00 to 29-JUL-23 15:03:00 (EST-5)
Location: DAWSONVILLE
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Trained Spotter

Tree damage was reported near Dawsonville, including a large tree that split in half in the 15200 block of Montevideo Road.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 29-JUL-23 15:04:00 to 29-JUL-23 15:04:00 (EST-5)
Location: SANDY SPG
Magnitude: 52.00 EG
Property damage: 3.00K
Reported by: 911 Call Center

Trees blew down in Olney, including on Gainford Court, and near the intersection of MD-108 Olney Sandy Spring Road past Prince Philip Drive.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 29-JUL-23 15:05:00 to 29-JUL-23 15:05:00 (EST-5)
Location: NEELSVILLE
Magnitude: 60.00 MG
Reported by: Mesonet

A wind gust of 60 knots (69 MPH) was measured by a mesonet at WeatherBug Headquarters in Germantown (AWSHQ).

Thunderstorm Wind in CHARLES, MARYLAND
From 29-JUL-23 16:30:00 to 29-JUL-23 16:40:00 (EST-5)
Location: POMFRET
Magnitude: 61.00 EG
Property damage: 250.00K
Reported by: Trained Spotter

Numerous large trees blew down in the Pomfret area, including along Billingsley Road, Bennsville Road, and Cattle Place.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 29-JUL-23 16:32:00 to 29-JUL-23 16:32:00 (EST-5)
Location: DRURY
Magnitude: 52.00 EG
Property damage: 2.00K
Reported by: Department of Highways

Trees blew down on southbound MD-794 at MD-408 Mount Zion Marlboro Road.

Thunderstorm Wind in CHARLES, MARYLAND
From 29-JUL-23 16:40:00 to 29-JUL-23 16:50:00 (EST-5)
Location: WALDORF
Magnitude: 61.00 EG
Property damage: 1.00M
Reported by: Trained Spotter

Numerous large trees blew down onto houses on Walleye Court, Mark Drive, and Cottoneaster Court.

Thunderstorm Wind in CHARLES, MARYLAND
From 29-JUL-23 16:45:00 to 29-JUL-23 16:45:00 (EST-5)
Location: INDIAN HEAD
Magnitude: 54.00 MG
Property damage: 10.00K
Reported by: Mesonet

A wind gust of 54 knots (62 MPH) was measured by a Tempest station on Water Tower Way. Several large trees blew down in the area.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 29-JUL-23 15:20:00 to 29-JUL-23 15:30:00 (EST-5)
Location: TWIN BROOK
Magnitude: 74.00 EG
Property damage: 10.00M
Reported by: Emergency Manager

Hundreds of trees, branches and wires blew down between Rockville and North Bethesda. Trees blew down onto cars and porches in the Bethesda Park Condo Complex, displacing residents. The roof blew off of The Original Pancake House in the 12200 block of MD-355 Rockville Pike; the roof partially blew off another building across the street. Large trees blew down onto structures in the 1200 block of Charles Road. Trees blew down on southbound MD-185 Connecticut Avenue at MD-586 Veirs Mill Road. Numeorus trees blew down along Tilden Lane. Trees blew down on MD-355 Rockville Pike at I-495 Capital Beltway. A large tree blew down onto two residences on Charles Road trapping several people.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 29-JUL-23 15:30:00 to 29-JUL-23 15:40:00 (EST-5)
Location: TAKOMA PARK
Magnitude: 52.00 EG
Property damage: 100.00K
Reported by: Emergency Manager

Numerous trees blew down around Silver Spring, Forest Glen, and Takoma Park. A tree blew down onto a house in the 500 block of Albany Avenue.