Thunderstorms with heavy rainfall, frequent lightning, large hail, and damaging winds moved through Maryland between midday and late evening on the 16th.  In Washington County, trees were downed and penny sized hail fell in Clear Spring. Rainfall totals included 2.37 inches in Smithsburg and 2.0 inches in Willamsport.  Lightning struck a home on Woodstock Lane in Boonsboro.  The resulting fire caused $70,000 damage to the structure. In Frederick County, a total of 2.2 inches of rain was recorded in Thurmont. In Carroll County, trees were downed in Pleasant Valley. In Baltimore County, trees were downed in Kingsville. Wires were downed in Cockeysville. In Harford County, several trees were downed, especially in the Bel Air, Fallston, and Darlington areas.  Quarter sized hail was also reported in Darlington.  In Bel Air, a tree was downed onto a home on Young Avenue.  Across the county 7 roads were blocked by fallen trees. In Fallston, a home on Ryan Road was damaged by a fallen tree and Tollgate Road was closed after a tree downed a utility pole.  Heavy downpours caused water to flood the following roads in the Fallston area: Harford Road, Route 152, Carrs Mill Road, Ryan Road, Tollgate Road, Route 1, Pleasantville Road, and Fork Road. A total of 2.24 inches of rain was recorded in Fallston. County officials said that over 85% of the gravel roads in the county would need reconditioning after rushing water caused ruts to form on the roads. In Montgomery County, trees were downed in Poolesville on Mt. Nebo Road. In Prince George's County, wires were downed near Brandywine. In Calvert County, trees were downed in Sunderland.  In Charles County, trees were downed in Wicomico and La Plata.  Wires were downed in Waldorf. In St. Mary's County, lightning struck a chimney at a boiler plant at Patuxent River Naval Air Station. The chimney fell onto parked cars and caused $10,000 damage.

Thunderstorm Wind in CARROLL, MARYLAND
From 16-AUG-03 21:40:00 to 16-AUG-03 21:40:00 (EST)
Location: PLEASANT VLY
Magnitude: 50 EG
Property damage: 1K
Reported by: FIRE DEPT/RESCUE SQUAD

Trees were downed.

Thunderstorm Wind in CHARLES, MARYLAND
From 16-AUG-03 16:00:00 to 16-AUG-03 16:00:00 (EST)
Location: LA PLATA
Magnitude: 50 EG
Property damage: 1K
Reported by: FIRE DEPT/RESCUE SQUAD

Trees were downed.

Heavy Rain in WASHINGTON, MARYLAND
From 16-AUG-03 13:00:00 to 16-AUG-03 15:00:00 (EST)
Location: COUNTYWIDE
Reported by: TRAINED SPOTTER

Thunderstorm Wind in BALTIMORE, MARYLAND
From 16-AUG-03 13:45:00 to 16-AUG-03 13:45:00 (EST)
Location: COCKEYSVILLE
Magnitude: 50 EG
Property damage: .5K
Reported by: TRAINED SPOTTER

Wires were downed.

Thunderstorm Wind in CHARLES, MARYLAND
From 16-AUG-03 15:50:00 to 16-AUG-03 15:50:00 (EST)
Location: WALDORF
Magnitude: 50 EG
Property damage: .5K
Reported by: TRAINED SPOTTER

Wires were downed.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 16-AUG-03 22:15:00 to 16-AUG-03 22:15:00 (EST)
Location: COUNTYWIDE
Magnitude: 50 EG
Property damage: 5K
Reported by: FIRE DEPT/RESCUE SQUAD

Trees were downed.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 16-AUG-03 15:00:00 to 16-AUG-03 15:00:00 (EST)
Location: POOLESVILLE
Magnitude: 50 EG
Property damage: 1K
Reported by: TRAINED SPOTTER

Trees were downed onto Mt. Nebo Road.

Lightning in WASHINGTON, MARYLAND
From 16-AUG-03 14:14:00 to 16-AUG-03 14:15:00 (EST)
Location: BOONSBORO
Property damage: 70K
Reported by: FIRE DEPT/RESCUE SQUAD

Lightning started a fire at a home.

Thunderstorm Wind in HARFORD, MARYLAND
From 16-AUG-03 14:05:00 to 16-AUG-03 14:20:00 (EST)
Location: COUNTYWIDE
Magnitude: 50 EG
Property damage: 10K
Reported by: NEWSPAPER

Several trees were downed, including two which fell onto a house.

Thunderstorm Wind in HARFORD, MARYLAND
From 16-AUG-03 11:39:00 to 16-AUG-03 11:39:00 (EST)
Location: DARLINGTON
Magnitude: 50 EG
Property damage: 1K
Reported by: TRAINED SPOTTER

Trees were downed.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 16-AUG-03 15:50:00 to 16-AUG-03 15:50:00 (EST)
Location: BRANDYWINE
Magnitude: 50 EG
Property damage: .5K
Reported by: TRAINED SPOTTER

Wires were downed.

Thunderstorm Wind in CHARLES, MARYLAND
From 16-AUG-03 16:45:00 to 16-AUG-03 16:45:00 (EST)
Location: WICOMICO
Magnitude: 50 EG
Property damage: 1K
Reported by: FIRE DEPT/RESCUE SQUAD

Trees were downed.

Hail in HARFORD, MARYLAND
From 16-AUG-03 11:39:00 to 16-AUG-03 11:39:00 (EST)
Location: DARLINGTON
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Quarter sized hail fell.

Thunderstorm Wind in WASHINGTON, MARYLAND
From 16-AUG-03 13:25:00 to 16-AUG-03 13:25:00 (EST)
Location: CLEAR SPG
Magnitude: 50 EG
Property damage: 1K
Reported by: TRAINED SPOTTER

Trees were downed.

Lightning in ST. MARY'S, MARYLAND
From 16-AUG-03 17:00:00 to 16-AUG-03 17:00:00 (EST)
Location: PATUXENT RIVER NAS
Property damage: 10K
Reported by: NEWSPAPER

Lightning knocked a chimney off a building.

Heavy Rain in FREDERICK, MARYLAND
From 16-AUG-03 13:30:00 to 16-AUG-03 15:30:00 (EST)
Location: COUNTYWIDE
Reported by: TRAINED SPOTTER

Thunderstorm Wind in CALVERT, MARYLAND
From 16-AUG-03 16:11:00 to 16-AUG-03 16:11:00 (EST)
Location: SUNDERLAND
Magnitude: 50 EG
Property damage: 1K
Reported by: FIRE DEPT/RESCUE SQUAD

Trees were downed.

Hail in WASHINGTON, MARYLAND
From 16-AUG-03 13:20:00 to 16-AUG-03 13:20:00 (EST)
Location: CLEAR SPG
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Penny sized hail was reported.

Flash Flood in HARFORD, MARYLAND
From 16-AUG-03 14:15:00 to 16-AUG-03 15:30:00 (EST)
Location: COUNTYWIDE
Reported by: NEWSPAPER

Roads were flooded and many gravel roads were partially washed out.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 16-AUG-03 14:15:00 to 16-AUG-03 14:15:00 (EST)
Location: KINGSVILLE
Magnitude: 50 EG
Property damage: 1K
Reported by: TRAINED SPOTTER

Trees were downed.