An upper-level trough provided cold air aloft while warm and moist air remained at the surface. Moderate amounts of instability developed during the afternoon and evening hours. Some thunderstorms that developed along and ahead of a pressure trough were able to produce damaging wind gusts and large hail.

Hail in BALTIMORE, MARYLAND
From 19-AUG-11 16:50:00 to 19-AUG-11 16:50:00 (EST-5)
Location: MIDDLE RIVER
Magnitude: 1.00 
Reported by: Public

Quarter sized hail was reported in Essex.

Hail in ANNE ARUNDEL, MARYLAND
From 19-AUG-11 17:44:00 to 19-AUG-11 17:44:00 (EST-5)
Location: VENICE ON THE BAY
Magnitude: 1.00 
Reported by: Public

Quarter sized hail was reported near the Fort Smallwood State Park.

Hail in BALTIMORE, MARYLAND
From 19-AUG-11 16:51:00 to 19-AUG-11 16:51:00 (EST-5)
Location: MIDDLE RIVER
Magnitude: 1.00 
Reported by: Trained Spotter

Quarter sized hail was reported near the intersection of eastern Avenue and Old Eastern Avenue.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 19-AUG-11 17:50:00 to 19-AUG-11 17:50:00 (EST-5)
Location: EARLEIGH HGTS
Magnitude: 52.00 EG
Property damage: 5.00K
Reported by: Trained Spotter

Siding was being removed from homes due to thunderstorm winds.

Hail in PRINCE GEORGE'S, MARYLAND
From 19-AUG-11 17:45:00 to 19-AUG-11 17:45:00 (EST-5)
Location: LARGO
Magnitude: 1.00 
Reported by: Public

Quarter sized hail was reported near Largo.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 19-AUG-11 17:10:00 to 19-AUG-11 17:10:00 (EST-5)
Location: CARNEY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Wind gusts were estimated to be around 60 mph.

Hail in ANNE ARUNDEL, MARYLAND
From 19-AUG-11 17:45:00 to 19-AUG-11 17:45:00 (EST-5)
Location: VENICE ON THE BAY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter sized hail was reported.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 19-AUG-11 17:50:00 to 19-AUG-11 17:50:00 (EST-5)
Location: JACOBSVILLE
Magnitude: 61.00 EG
Property damage: 10.00K
Reported by: Public

Multiple power poles were torn down and a tree that was six inches in diameter was uprooted.

Hail in ANNE ARUNDEL, MARYLAND
From 19-AUG-11 17:45:00 to 19-AUG-11 17:45:00 (EST-5)
Location: LAKE SHR
Magnitude: 1.00 
Reported by: Public

Quarter sized hail was reported near Lake Shore.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 19-AUG-11 17:50:00 to 19-AUG-11 17:50:00 (EST-5)
Location: JACOBSVILLE
Magnitude: 61.00 EG
Property damage: 1.00K
Reported by: Broadcast Media

A large tree was uprooted by a thunderstorm wind gust.

Thunderstorm Wind in WASHINGTON, MARYLAND
From 19-AUG-11 15:03:00 to 19-AUG-11 15:03:00 (EST-5)
Location: INDIAN SPGS
Magnitude: 50.00 EG
Property damage: 2.00K
Reported by: Public

Multiple small trees and branches were down.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 19-AUG-11 16:57:00 to 19-AUG-11 16:57:00 (EST-5)
Location: LYNCH PT
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Public

A tree was down near the intersection of Wildwood Beach Road and Riverview Road.

Hail in WASHINGTON, MARYLAND
From 19-AUG-11 15:03:00 to 19-AUG-11 15:03:00 (EST-5)
Location: MOFFET
Magnitude: 1.00 
Reported by: Public

Quarter sized hail was reported near Pecktonville.

Hail in BALTIMORE, MARYLAND
From 19-AUG-11 16:57:00 to 19-AUG-11 16:57:00 (EST-5)
Location: CARNEY
Magnitude: 1.00 
Reported by: Public

Quarter sized hail was reported on Placid Avenue.