A subtropical ridge was over the Mid Atlantic with northwesterly flow leading to hot and humid conditions.  This led to a unstable atmosphere and thunderstorms formed.

Thunderstorm Wind in WASHINGTON, MARYLAND
From 25-JUN-13 20:17:00 to 25-JUN-13 20:17:00 (EST-5)
Location: CORBETT
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.50K
Reported by: 911 Call Center

There was one tree down in the city and multiple wires down.

Thunderstorm Wind in FREDERICK, MARYLAND
From 25-JUN-13 20:27:00 to 25-JUN-13 20:27:00 (EST-5)
Location: WOLFSVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.50K
Reported by: 911 Call Center

There was a tree into a house on Brandenburg Hallow Road.

Thunderstorm Wind in FREDERICK, MARYLAND
From 25-JUN-13 20:48:00 to 25-JUN-13 20:48:00 (EST-5)
Location: PETERSVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Department of Highways

There were two large trees down blocking Jefferson Pike north of Burkittsville Road.

Thunderstorm Wind in CARROLL, MARYLAND
From 25-JUN-13 20:48:00 to 25-JUN-13 20:48:00 (EST-5)
Location: WESTMINSTER ARPT
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 2.00K
Reported by: Public

There were a couple trees knocked onto Sullivan Road.  There was damage to Sullivan Road community pool.

Thunderstorm Wind in CARROLL, MARYLAND
From 25-JUN-13 20:56:00 to 25-JUN-13 20:56:00 (EST-5)
Location: WESTMINSTER ARPT
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 2.00K
Reported by: Public

There were a few trees down.  A wooden swing set toppled over and shudders were off of a house and missing.  There was fencing down and a shed moved off its foundation.  A vehicle slid onto a curb.

Thunderstorm Wind in CARROLL, MARYLAND
From 25-JUN-13 20:56:00 to 25-JUN-13 20:56:00 (EST-5)
Location: WESTMINSTER ARPT
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.50K
Reported by: Emergency Manager

There were several trees snapped and one was on a home.

Thunderstorm Wind in CARROLL, MARYLAND
From 25-JUN-13 20:50:00 to 25-JUN-13 20:50:00 (EST-5)
Location: PATAPSCO
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 2.00K
Reported by: Public

There was one large pine tree snapped and several other large limbs downed from other trees.  One limb was on a vehicle.  The damage was isolated to three homes in the community.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 25-JUN-13 21:04:00 to 25-JUN-13 21:04:00 (EST-5)
Location: WOODENSBURG
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in HARFORD, MARYLAND
From 25-JUN-13 21:30:00 to 25-JUN-13 21:30:00 (EST-5)
Location: FALLSTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.50K
Reported by: Department of Highways

There was a large tree down blocking northbound lanes of MD 152 at Rochelle Road.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 25-JUN-13 21:30:00 to 25-JUN-13 21:30:00 (EST-5)
Location: FRANKLINVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.25K
Reported by: Trained Spotter

There were a couple of five inch diameter tree limbs broken.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 25-JUN-13 21:48:00 to 25-JUN-13 21:48:00 (EST-5)
Location: BALTIMORE MARTIN ST
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in CARROLL, MARYLAND
From 25-JUN-13 20:50:00 to 25-JUN-13 20:50:00 (EST-5)
Location: DEEP RUN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.50K
Reported by: Public

There was a tree down on Grand Valley Road.