Thunderstorms with high winds, heavy rainfall, and frequent lightning moved through Central and Western Maryland during the afternoon and evening of the 31st.  In Washington County, several trees were downed across the county.  Several roads were also flooded, including Ed Sears Road.  In Frederick County,  heavy downpours caused a pond to overflow in Knoxville.  A new home near the pond was damaged by the high water.  Street flooding was also reported in town.  Flooding was also reported on Interstate 270 near the Montgomery County border. Pea to marble sized hail fell in Frederick. Also in Frederick, a wind gust of 53 MPH was recorded and a tree was downed onto a car on West College Parkway.  In Carroll County, small streams overflowed their banks. Flooding was reported on Twin Arch Road in Mt. Airy.  Trees were downed in Winfield on Dennings, Buckhorn, and John Pickett roads.  A home in Marriottsville burned to the ground after being struck by lightning.  In Montgomery County, wires were downed onto Route 108 near New Hampshire Avenue in Olney.  Large tree branches were downed onto cars in Gaithersburg. Minor flooding was reported in a parking lot and a field in Germantown.  Minor flooding was also reported on Route 355 near Route 118. In Anne Arundel County, tree limbs were downed onto electrical wires in Arnold.  In Prince George's County, a wind gust of 61 MPH was recorded at Andrews Air Force Base. Power outages were reported along Walker Mill Road and Marlboro Pike. A portion of Route 50 between routes 197 and 301 in Bowie was closed for 30 minutes after a backed up storm drain caused flooding.

Flash Flood in CARROLL, MARYLAND
From 31-MAY-03 16:30:00 to 31-MAY-03 17:30:00 (EST)
Location: WESTMINSTER
Reported by: LAW ENFORCEMENT

Small streams overflowed their banks.  Twin Arch Road was flooded.

Heavy Rain in PRINCE GEORGE'S, MARYLAND
From 31-MAY-03 18:00:00 to 31-MAY-03 19:00:00 (EST)
Location: COUNTYWIDE
Reported by: NEWSPAPER

Route 50 had to be shut down for 30 minutes due to flooding caused by a clogged drain.

Thunderstorm Wind in CARROLL, MARYLAND
From 31-MAY-03 15:40:00 to 31-MAY-03 15:40:00 (EST)
Location: WINFIELD
Magnitude: 50 EG
Property damage: .5K
Reported by: TRAINED SPOTTER

Trees were downed onto three roads.  The time was estimated.

Thunderstorm Wind in WASHINGTON, MARYLAND
From 31-MAY-03 14:44:00 to 31-MAY-03 14:44:00 (EST)
Location: COUNTYWIDE
Magnitude: 50 EG
Property damage: 5K
Reported by: TRAINED SPOTTER

Several trees were downed across the county.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 31-MAY-03 17:10:00 to 31-MAY-03 17:10:00 (EST)
Location: OLNEY
Magnitude: 50 EG
Property damage: .5K
Reported by: NEWSPAPER

Wires were downed onto Route 108.

Heavy Rain in MONTGOMERY, MARYLAND
From 31-MAY-03 17:00:00 to 31-MAY-03 18:00:00 (EST)
Location: COUNTYWIDE
Reported by: TRAINED SPOTTER

Minor flooding was reported in a parking lot and field.  Minor flooding was also reported on Route 355 at Route 118.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 31-MAY-03 18:30:00 to 31-MAY-03 18:30:00 (EST)
Location: ANDREWS AFB
Magnitude: 53 MG
Reported by: AWOS,ASOS,MESONET,ETC

A 61 MPH wind gust was recorded.

Thunderstorm Wind in FREDERICK, MARYLAND
From 31-MAY-03 15:20:00 to 31-MAY-03 15:20:00 (EST)
Location: FREDERICK
Magnitude: 50 EG
Property damage: .1K
Reported by: NEWSPAPER

A tree was downed onto West College Parkway.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 31-MAY-03 17:15:00 to 31-MAY-03 17:15:00 (EST)
Location: GAITHERSBURG
Magnitude: 50 EG
Property damage: .5K
Reported by: NEWSPAPER

Large tree branches were downed onto cars.

Lightning in CARROLL, MARYLAND
From 31-MAY-03 23:27:00 to 31-MAY-03 23:27:00 (EST)
Location: SYKESVILLE
Property damage: 200K
Reported by: NEWSPAPER

A two story home in Marriottsville burned to the ground after being struck by lightning.

Flash Flood in FREDERICK, MARYLAND
From 31-MAY-03 16:30:00 to 31-MAY-03 17:30:00 (EST)
Location: COUNTYWIDE
Reported by: TRAINED SPOTTER

A portion of Interstate 270 was flooded near the Montgomery County line.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 31-MAY-03 18:51:00 to 31-MAY-03 18:51:00 (EST)
Location: ARNOLD
Magnitude: 50 EG
Property damage: 5K
Reported by: NEWSPAPER

Tree limbs were felled onto power lines.

Flash Flood in FREDERICK, MARYLAND
From 31-MAY-03 16:44:00 to 31-MAY-03 18:00:00 (EST)
Location: KNOXVILLE
Reported by: NEWSPAPER

Streets were flooded and a home was damaged after a pond overflowed.