Scattered severe thunderstorms developed on July 4 due to an approaching cold front and a very unstable airmass residing over the Mid-Atlantic. The severe storms formed along the Blue Ridge Mountains and moved east into the Washington and Baltimore suburbs during the evening. The hardest hit areas included a large portion of Prince Georges County in suburban Washington, and a section of Annapolis that experienced extensive tree damages. Many 4th of July festivities were affected by this bout of severe weather.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 04-JUL-06 15:45:00 to 04-JUL-06 16:05:00 (EST)
Location: CHEVY CHASE
Magnitude: 55 EG
Property damage: 100K
Reported by: EMERGENCY MANAGER

Substantial damages occurred with the severe storms as they moved through the southern portion of Montgomery County, close to Washington DC.  Numerous trees were downed across the Chevy Chase and Wheaton areas. Many trees were also downed in the Branch Park area. Reports were received from trained spotters, emergency managers, and off-duty NWS meteorologists.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 04-JUL-06 13:40:00 to 04-JUL-06 13:40:00 (EST)
Location: GERMANTOWN
Magnitude: 50 EG
Property damage: 15K
Reported by: FIRE DEPT/RESCUE SQUAD

Trees and powerlines downed.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 04-JUL-06 16:20:00 to 04-JUL-06 16:45:00 (EST)
Location: HYATTSVILLE
Magnitude: 55 EG
Property damage: 1M
Reported by: GENERAL PUBLIC

Extensive tree damage occurred in the University Park section of Prince Georges County, including  College Heights Estates and Lewisdale. Reports were collected from the public, county officials, trained spotters, and newspaper accounts that included trees downed on vehicles and houses and broken sidewalks due to uprooted trees. County officials reported extensive tree damage in the Bowie area as well. About 200 weather-related incidents involving vehicles and property damages were recorded by Prince Georges County officials within a 2 hour period.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 04-JUL-06 16:35:00 to 04-JUL-06 16:35:00 (EST)
Location: ANNAPOLIS
Magnitude: 50 EG
Property damage: 250K
Reported by: EMERGENCY MANAGER

20 to 30 trees were downed on houses in Annapolis.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 04-JUL-06 17:30:00 to 04-JUL-06 17:30:00 (EST)
Location: BRANDYWINE
Magnitude: 50 EG
Property damage: 25K
Reported by: EMERGENCY MANAGER

Trees downed.

Thunderstorm Wind in CHARLES, MARYLAND
From 04-JUL-06 17:30:00 to 04-JUL-06 17:30:00 (EST)
Location: NANJEMOY
Magnitude: 50 EG
Property damage: 20K
Reported by: EMERGENCY MANAGER

Trees downed.

Thunderstorm Wind in HARFORD, MARYLAND
From 04-JUL-06 14:00:00 to 04-JUL-06 14:00:00 (EST)
Location: JARRETTSVILLE
Magnitude: 50 EG
Property damage: 7K
Reported by: UTILITY COMPANY

Trees downed.

Thunderstorm Wind in CARROLL, MARYLAND
From 04-JUL-06 14:20:00 to 04-JUL-06 14:20:00 (EST)
Location: WOODBINE
Magnitude: 50 EG
Property damage: 10K
Reported by: UTILITY COMPANY

Tree downed which knocked out power to 35 homes.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 04-JUL-06 14:41:00 to 04-JUL-06 14:41:00 (EST)
Location: COCKEYSVILLE
Magnitude: 50 EG
Property damage: 25K
Reported by: FIRE DEPT/RESCUE SQUAD

Tree downed on a vehicle passing by on Interstate 83 north of Baltimore City.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 04-JUL-06 21:45:00 to 04-JUL-06 21:46:00 (EST)
Location: MECHANICSVILLE
Magnitude: 50 EG
Property damage: 15K
Reported by: FIRE DEPT/RESCUE SQUAD

Trees downed.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 04-JUL-06 21:55:00 to 04-JUL-06 21:55:00 (EST)
Location: CALIFORNIA
Magnitude: 50 EG
Property damage: 20K
Reported by: FIRE DEPT/RESCUE SQUAD

Trees downed in California and Lexington Park.