Thunderstorms with very heavy rainfall, frequent lightning, and damaging winds moved through Central Maryland during the afternoon and early evening of the 30th.  In Howard County, the Patapsco River overflowed sending water rushing down onto Route 1 in Elkridge.  The highway remained closed for several hours and some cars became stalled in the high water.  A total of 3.4 inches of rain was recorded in Elkridge and 2.53 inches of this total fell in one hour.  Marble to quarter sized hail was reported in Columbia.  In Prince George's County, a 16-year-old boy was struck by lightning in the Bowie area.  He was treated for non-life threatening injuries.  A home in Bowie on Pond Meadow Lane caught fire after being hit by lightning.  In Calvert County, two homes were hit by lightning in Dunkirk and a corn field was flattened.  Up to 3 inches of rain reportedly fell in only one hour.  In Charles County, flooding was reported in Hughesville.  Trees and power lines were downed countywide.  In Anne Arundel County, storms with heavy downpours sat over the northern portion of the county during the afternoon and caused extensive flooding.  Several roads were closed after creeks and streams overflowed.  The southbound lanes of Ritchie Highway were closed after Cypress Creek overflowed.  Flooding was also reported on Fort Smallwood Road, Rock Hill Road, and Forest Drive.  Seven basements were flooded.  An observer in Riviera Beach recorded 2 inches of rainfall in only 30 minutes.  An observer in Annapolis reported 0.70 inches of rain in only 10 minutes.  By early evening, these storms affected the entire county and contained frequent lightning and damaging winds.  Officials reported 15 downed trees and power lines in the Linthicum area.  Nine buildings were struck by lightning.  One bolt started a two alarm fire at a home in Pasedena which resulted in $80,000 damage.  Lightning also caused damage at Baltimore/Washington International Airport.  A series of strikes over a 10 minute period burned two holes in Runway 1028 and damaged the airport's main radar tower.  Rainfall totals included 5.53 inches in Riviera Beach, 4.24 inches at Baltimore/Washington International Airport, 3.44 inches in Millersville, and 3.00 inches in Odenton.  Around 20,000 customers lost power across the county as a direct result of the storms.

Flash Flood in HOWARD, MARYLAND
From 30-AUG-01 18:00:00 to 30-AUG-01 19:00:00 (EST)
Location: SOUTHEAST PORTION
Reported by: TRAINED SPOTTER

Route 1 and other roads were flooded in Elkridge after a tributary of the Patapsco River overflowed.

Thunderstorm Wind in CHARLES, MARYLAND
From 30-AUG-01 18:10:00 to 30-AUG-01 18:10:00 (EST)
Location: HUGHESVILLE
Property damage: 2K
Reported by: TRAINED SPOTTER

Trees and power lines were downed.

Lightning in PRINCE GEORGE'S, MARYLAND
From 30-AUG-01 17:30:00 to 30-AUG-01 17:30:00 (EST)
Location: BOWIE
Reported by: NEWSPAPER

A 16-year-old boy was injured by lightning.  A house caught fire after being hit by lightning.

Hail in HOWARD, MARYLAND
From 30-AUG-01 17:02:00 to 30-AUG-01 17:07:00 (EST)
Location: COLUMBIA
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Marble to quarter sized hail was reported.

Lightning in ANNE ARUNDEL, MARYLAND
From 30-AUG-01 17:24:00 to 30-AUG-01 17:24:00 (EST)
Location: BALTIMORE WASHINGTON
Reported by: NEWSPAPER

Lightning damaged a runway and the main radar tower at BWI.

Heavy Rain in ANNE ARUNDEL, MARYLAND
From 30-AUG-01 12:00:00 to 30-AUG-01 18:00:00 (EST)
Location: SOUTH PORTION
Reported by: TRAINED SPOTTER

Lightning in ANNE ARUNDEL, MARYLAND
From 30-AUG-01 12:15:00 to 30-AUG-01 12:15:00 (EST)
Location: PASADENA
Property damage: 80K
Reported by: EMERGENCY MANAGER

Lightning struck 9 buildings across the county and caused a 2 alarm house fire in Pasedena.

Flash Flood in ANNE ARUNDEL, MARYLAND
From 30-AUG-01 13:00:00 to 30-AUG-01 18:30:00 (EST)
Location: NORTH PORTION
Reported by: NEWSPAPER

Numerous roads and basements were flooded.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 30-AUG-01 17:00:00 to 30-AUG-01 18:00:00 (EST)
Location: LINTHICUM HGTS
Property damage: 8K
Reported by: NEWSPAPER

Fifteen trees and power lines were downed in Linthicum.

Flash Flood in CHARLES, MARYLAND
From 30-AUG-01 19:00:00 to 30-AUG-01 20:00:00 (EST)
Location: COUNTYWIDE
Reported by: LAW ENFORCEMENT

Roads and basements were flooded in Hughesville.