A deep low pressure system moving east across the Great Lakes pushed a strong cold front across the region on late April 20th into early April 21st. Numerous strong to severe thunderstorms developed during the afternoon and evening hours across the region and continued into the following morning. High moisture content and training storms lead to flooding across potions of the region with several road closures due to high water. Several storms produced damaging winds that downed trees and power lines. There were also two confirmed tornadoes in Charles and Prince Georges counties.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 20-APR-08 16:46:00 to 20-APR-08 16:46:00 (EST-5)
Location: PADONIA
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Baltimore County Emergency Management reported trees down at the intersection of Dalecrest Court and Chetwood Drive.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 20-APR-08 16:55:00 to 20-APR-08 16:55:00 (EST-5)
Location: COCKEYSVILLE
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Baltimore County Emergency Management reported trees down at the intersection of Wight Ave and McCormick Road.

Flood in FREDERICK, MARYLAND
From 20-APR-08 20:10:00 to 20-APR-08 22:20:00 (EST-5)
Location: LEWISTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Frederick County Emergency Management reported roads closed in Lewistown.

Tornado in PRINCE GEORGE'S, MARYLAND
From 20-APR-08 13:27:00 to 20-APR-08 13:35:00 (EST-5)
Location: UNIVERSITY PARK
Tornado F-scale: EF1
Property damage: 40.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An NWS survey team confirmed a tornado just west of Hyattsville in Chillum. The tornado touched down at a water park near the intersection of Sargent Road and Ray Road. Tree damage was noted at the water park. The tornado intensified as it crossed a wooded area and field behind the George E. Peters Adventist Elementary School. Peak winds estimated at near 100 mph then struck the school, lifting the northeast section of the roof and throwing most of it into the downwind parking lot. A construction office trailer was thrown on its side. Some debris from the school was carried high into nearby trees while some was blown into the Metropolitan Adventist Church across the parking lot, destroying some church windows. A piece of plywood was carried across Riggs Road into the Prince Georges County Fire Station 44, knocking out power. A science teacher in the school and a fireman at the station both reported seeing rotation as debris was carried by the wind. The storms continued north, downing trees along Riggs Road as well as a light pole in the parking lot of a shopping center.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 20-APR-08 13:35:00 to 20-APR-08 13:35:00 (EST-5)
Location: CLINTON HYDE FLD ARP
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Prince Georges County Fire and Rescue Department reported several large trees down on Pats Lane near Allentown Road in Fort Washington.

Hail in HARFORD, MARYLAND
From 20-APR-08 12:38:00 to 20-APR-08 12:38:00 (EST-5)
Location: NORRISVILLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Tornado in CHARLES, MARYLAND
From 20-APR-08 13:09:00 to 20-APR-08 13:15:00 (EST-5)
Location: BEANTOWN
Tornado F-scale: EF0
Property damage: 50.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An NWS survey team confirmed a tornado just northeast of LaPlata in St Charles. The tornado touched down near the intersection of Renner Road and Route 5/Leonardtown Road, tracking north and damaging the eastern section of St Charles. The most damaged parts of the community were around Snowbell Court, Sweetbriar Place and Northgate Place. The damage included several large trees snapped and uprooted, some of which fell into houses and other vehicles. Several homes lost roofing and sections of siding. A large storage shed was shifted off its foundation and had some of its doors blown out.

Hail in HARFORD, MARYLAND
From 20-APR-08 13:25:00 to 20-APR-08 13:25:00 (EST-5)
Location: BEL AIR
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Lightning in BALTIMORE, MARYLAND
From 20-APR-08 17:30:00 to 20-APR-08 17:30:00 (EST-5)
Location: DANIELS
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Newspaper

A newspaper reported that lightning struck a home under construction on Wrights Mill Road in Randallstown.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 20-APR-08 17:20:00 to 20-APR-08 17:20:00 (EST-5)
Location: BECKLEYSVILLE
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Baltimore County Emergency Management reported trees down on Gunpowder Road between Compass Run Lane and Beckleysville Road.

Lightning in ANNE ARUNDEL, MARYLAND
From 20-APR-08 14:30:00 to 20-APR-08 14:30:00 (EST-5)
Location: SEVERN
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Newspaper

A newspaper reported that a 2-story house on the 770 block of Ricker Road was struck by lightning and caught fire.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 20-APR-08 16:36:00 to 20-APR-08 16:36:00 (EST-5)
Location: RUXTON
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Baltimore County Emergency Management reported trees down at the intersection of Ruxton Road and Alvern Ave.

Flood in BALTIMORE, MARYLAND
From 20-APR-08 19:30:00 to 20-APR-08 22:30:00 (EST-5)
Location: BECKLEYSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Baltimore County Emergency Management reported flooding on Gunpowder Road between Compass Run Lane and Beckleysville Road..