A cold front approached the region on July 27th as a strong upper level low pressure system remained over the northeast. Warm and humid air at the surface interacted with cooler air aloft to produce scattered to numerous showers and thunderstorms during the afternoon hours. Many of the storms became severe, producing damaging winds that downed trees and power lines. Large hail to the size of quarters was also reported.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 27-JUL-08 11:50:00 to 27-JUL-08 11:50:00 (EST-5)
Location: PIONEER CITY
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter measured a wind gust of 60 MPH.

Lightning in MONTGOMERY, MARYLAND
From 27-JUL-08 16:15:00 to 27-JUL-08 16:15:00 (EST-5)
Location: SILVER SPG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A local newspaper reported woman sustained serious injuries when she took shelter under a tree that was then struck by lightning.

Hail in ANNE ARUNDEL, MARYLAND
From 27-JUL-08 12:50:00 to 27-JUL-08 12:50:00 (EST-5)
Location: MARYLAND CITY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

An NWS employee reported hail to the size of pennies east of Laurel.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 27-JUL-08 12:00:00 to 27-JUL-08 12:00:00 (EST-5)
Location: SEVERN
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported trees down in Severn.

Thunderstorm Wind in CHARLES, MARYLAND
From 27-JUL-08 13:26:00 to 27-JUL-08 13:26:00 (EST-5)
Location: HILL TOP
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported trees down along Route 6 at Wards Run.

Thunderstorm Wind in CHARLES, MARYLAND
From 27-JUL-08 13:28:00 to 27-JUL-08 13:28:00 (EST-5)
Location: HILL TOP
Magnitude: 50.00 EG
Property damage: 6.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Charles County Emergency Management reported trees and power lines down in Hill Top.

Thunderstorm Wind in CHARLES, MARYLAND
From 27-JUL-08 13:30:00 to 27-JUL-08 13:30:00 (EST-5)
Location: NANJEMOY
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Charles County Fire and Rescue reported trees down in Nanjemoy.

Thunderstorm Wind in CHARLES, MARYLAND
From 27-JUL-08 13:48:00 to 27-JUL-08 13:48:00 (EST-5)
Location: FAULKNER
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported numerous trees down along Popes Creek Road.

Thunderstorm Wind in CHARLES, MARYLAND
From 27-JUL-08 13:52:00 to 27-JUL-08 13:52:00 (EST-5)
Location: BEL ALTON
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Charles County Fire and Rescue reported trees down in Bel Alton.

Thunderstorm Wind in CHARLES, MARYLAND
From 27-JUL-08 13:56:00 to 27-JUL-08 13:56:00 (EST-5)
Location: NEWBURG
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Charles County Fire and Rescue reported trees down in Newburg.

Thunderstorm Wind in HARFORD, MARYLAND
From 27-JUL-08 13:00:00 to 27-JUL-08 13:00:00 (EST-5)
Location: ABERDEEN
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Newspaper

A local newspaper reported several trees down on Mount Royal and West Bel Air Avenues. Some trees fell on houses, producing minor roof and gutter damage.

Thunderstorm Wind in HOWARD, MARYLAND
From 27-JUL-08 16:00:00 to 27-JUL-08 16:00:00 (EST-5)
Location: CLARKSVILLE
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Howard County Emergency Management reported a downed tree blocking Corina Court.

Lightning in MONTGOMERY, MARYLAND
From 27-JUL-08 16:00:00 to 27-JUL-08 16:00:00 (EST-5)
Location: CLARKSBURG
Property damage: 105.00K
Crop damage: 0.00K
Reported by: Newspaper

A local newspaper reported a lightning-sparked house fire in Clarksburg. Also in Clarksburg, a tree was struck by lightning and caught on fire. Fire then spread to a nearby shed.

Hail in ANNE ARUNDEL, MARYLAND
From 27-JUL-08 12:00:00 to 27-JUL-08 12:00:00 (EST-5)
Location: SEVERN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported hail to the size of pennies.

Hail in CARROLL, MARYLAND
From 27-JUL-08 11:15:00 to 27-JUL-08 11:15:00 (EST-5)
Location: NEW WINDSOR
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail to the size of pennies were reported in New Windsor.

Hail in HOWARD, MARYLAND
From 27-JUL-08 11:43:00 to 27-JUL-08 11:43:00 (EST-5)
Location: SAVAGE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported hail to the size of pennies.

Hail in HARFORD, MARYLAND
From 27-JUL-08 12:39:00 to 27-JUL-08 12:39:00 (EST-5)
Location: BEL AIR
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

An amateur radio operator reported hail to the size of nickels in Bel Air.

Hail in MONTGOMERY, MARYLAND
From 27-JUL-08 15:50:00 to 27-JUL-08 15:50:00 (EST-5)
Location: NORBECK
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported hail to the size of pennies near Olney.

Hail in ANNE ARUNDEL, MARYLAND
From 27-JUL-08 11:52:00 to 27-JUL-08 11:52:00 (EST-5)
Location: FT MEADE JCT
Magnitude: 1.00 
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported hail to the size of quarters. The hail caused a hole in a car windshield.

Hail in ANNE ARUNDEL, MARYLAND
From 27-JUL-08 12:25:00 to 27-JUL-08 12:25:00 (EST-5)
Location: MAYFIELD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported hail to the size of quarters.

Hail in ANNE ARUNDEL, MARYLAND
From 27-JUL-08 11:50:00 to 27-JUL-08 12:15:00 (EST-5)
Location: FT MEADE JCT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters reported hail to the size of quarters along Route 32 and at Fort Meade.

Hail in MONTGOMERY, MARYLAND
From 27-JUL-08 16:15:00 to 27-JUL-08 16:15:00 (EST-5)
Location: HILLANDALE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

An NWS employee reported hail to the size of pennies near Beltsville.