A slow moving cold front moved towards the Mid Atlantic Coast on July 23rd. This front provided the focus for scattered to numerous showers and thunderstorms to develop during the afternoon and evening hours. With high amounts of moisture in place, some storms produced heavy rainfall. Storms also moved repeatedly over the same areas. This allowed flash flooding to occur across the Baltimore metro area, resulting in several road closures and water rescues. Severe thunderstorms also occurred, with gusty winds downing trees and power lines. There were also a few reports of large hail.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 23-JUL-08 19:40:00 to 23-JUL-08 19:40:00 (EST-5)
Location: WOODHAVEN
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Montgomery County Law Enforcement reported trees down on Hollins Drive.

Thunderstorm Wind in CHARLES, MARYLAND
From 23-JUL-08 19:11:00 to 23-JUL-08 19:11:00 (EST-5)
Location: WALDORF
Magnitude: 50.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Charles County Law Enforcement reported trees down into power lines near Waldorf.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 23-JUL-08 19:40:00 to 23-JUL-08 19:40:00 (EST-5)
Location: CHEVY CHASE
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Montgomery County Law Enforcement reported trees down on Raymond Street.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 23-JUL-08 19:45:00 to 23-JUL-08 19:45:00 (EST-5)
Location: GOOD HOPE
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Montgomery County Law Enforcement reported trees down on Ansted Court.

Flash Flood in HOWARD, MARYLAND
From 23-JUL-08 20:00:00 to 23-JUL-08 23:00:00 (EST-5)
Location: ELKRIDGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Local broadcast media reported 3 lanes of Interstate 95 closed due to high water.

Flash Flood in HARFORD, MARYLAND
From 23-JUL-08 22:00:00 to 23-JUL-08 23:30:00 (EST-5)
Location: HICKORY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Route 1 was closed north of Route 543 due to flash flooding.

Thunderstorm Wind in BALTIMORE CITY (C), MARYLAND
From 23-JUL-08 14:35:00 to 23-JUL-08 14:35:00 (EST-5)
Location: GARDENVILLE
Magnitude: 50.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Newspaper

A local newspaper reported downed trees along Hillen Road near Argonne Drive.

Thunderstorm Wind in CHARLES, MARYLAND
From 23-JUL-08 18:47:00 to 23-JUL-08 18:47:00 (EST-5)
Location: HUGHESVILLE
Magnitude: 50.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Charles County Law Enforcement reported trees down near Hughesville.

Thunderstorm Wind in CHARLES, MARYLAND
From 23-JUL-08 19:05:00 to 23-JUL-08 19:05:00 (EST-5)
Location: ST CHARLES
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Newspaper

A local newspaper reported trees down on power lines on Copley Avenue in St. Charles.

Hail in BALTIMORE, MARYLAND
From 23-JUL-08 14:46:00 to 23-JUL-08 14:46:00 (EST-5)
Location: OAKLEIGH
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported hail to the size of a penny.

Flash Flood in BALTIMORE, MARYLAND
From 23-JUL-08 20:00:00 to 23-JUL-08 22:00:00 (EST-5)
Location: PIKESVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Baltimore County Fire and Rescue reported several water rescues in southwestern Baltimore County.

Flash Flood in BALTIMORE CITY (C), MARYLAND
From 23-JUL-08 20:00:00 to 23-JUL-08 22:00:00 (EST-5)
Location: MT ROYAL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Local broadcast media reported a water rescue at Exeter Hall Avenue and Aisquith Street. Northbound ramps of the Jones Falls Expressway at President Street and Monument Street were closed.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 23-JUL-08 19:50:00 to 23-JUL-08 19:50:00 (EST-5)
Location: TAKOMA PARK
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Montgomery County Law Enforcement reported trees down along Piney Branch Road between Sligo Creek Parkway and Flower Avenue.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 23-JUL-08 19:45:00 to 23-JUL-08 19:45:00 (EST-5)
Location: WHEATON
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Montgomery County Law Enforcement reported trees down along Arcola Avenue between Kemp Mill Road and Channing Drive.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 23-JUL-08 18:05:00 to 23-JUL-08 18:05:00 (EST-5)
Location: CLEMENTS
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

St. Mary's County Emergency Management reported trees and power lines down near Clements.

Hail in ST. MARY'S, MARYLAND
From 23-JUL-08 17:35:00 to 23-JUL-08 17:35:00 (EST-5)
Location: PARK HALL ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported hail to the size of a quarter.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 23-JUL-08 18:15:00 to 23-JUL-08 18:15:00 (EST-5)
Location: ANNAPOLIS
Magnitude: 50.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Newspaper

A local newspaper reported downed trees and power lines in Annapolis.