A cold front passed across Maryland during the early evening hours of the 10th.  Numerous thunderstorms erupted along and ahead of the front and many location saw several rounds of strong to severe weather.  The first round of storms developed over Central Maryland around 11:00 AM EDT.  Dime sized hail fell at Silver Spring in Montgomery County.  In Anne Arundel County, trees and power lines were downed in Annapolis and a lightning strike started a house fire in Rivera Beach.  Over 10,000 county customers lost power. Thunderstorms redeveloped during the afternoon and continued through sunset, producing damaging winds, large hail, frequent lightning, and very heavy downpours.  In Washington County, 60 MPH winds and dime sized hail were reported near Smithsburg.  Small trees were downed east of Hagerstown where winds gusted to 44 MPH.  Pea sized hail fell in Williamsport and at the Hagerstown Airport.  In Frederick County, a tree fell onto a home in Thurmont and several trees and power lines were downed in the vicinity.  Tennis ball sized hail fell in Ladiesburg and dime to quarter sized hail fell in Frederick.  In Emmitsburg, winds blew hard enough to briefly lift a pickup truck and a funnel cloud was spotted nearby.  Lightning struck a home in New Market.  In Carroll County, tennis ball sized hail fell in Bruceville and Keymar and hen egg sized hail fell in Eldersburg.  Several cars were dented in these areas.  Quarter to golfball sized hail fell near Westminster and in Taneytown. Dime sized hail fell in Union Bridge, Linwood, and Manchester.  Pea sized hail fell in Sykesville.  A home was hit by lightning in New Windsor and a 54 MPH wind gust was reported in Millers. In Baltimore County, a funnel cloud was spotted in Pikesville.  Dime sized hail fell in Reisertown and Owings Mills, and pea sized hail was reported in Towson.  In Anne Arundel County, a 50 MPH wind gust was reported in Annapolis and Rivera Beach.  In Montgomery County, a tree was downed.  Dime sized hail fell in Damascus and Darnestown and marble sized hail fell in Rockville and Gaithersburg.  In Prince George's County, several trees and power lines were downed.  Pea sized hail fell in Accokeek, Brandywine, and Camp Springs.  Marble sized hail fell near the Wilson Bridge.  In Charles County, pea to dime sized hail fell in Waldorf.  Downed trees, numerous lightning strikes, and minor street flooding were also reported.  A 60 MPH wind gust was reported in White Plains.  In Calvert County, trees were downed in Chesapeake Beach and Prince Frederick.  Pea sized hail fell in Dunkirk.  In St. Mary's County, trees were downed in Mechanicsville and dime sized hail fell in Hollywood.

Hail in BALTIMORE, MARYLAND
From 10-MAY-00 15:53:00 to 10-MAY-00 16:02:00 (EST)
Location: REISTERSTOWN
Magnitude: 0.75 
Reported by: EMERGENCY MANAGER

Dime sized hail fell.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 10-MAY-00 16:00:00 to 10-MAY-00 16:00:00 (EST)
Location: COUNTYWIDE
Property damage: 5K
Reported by: LAW ENFORCEMENT

Trees and power lines were downed.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 10-MAY-00 17:10:00 to 10-MAY-00 17:10:00 (EST)
Location: COUNTYWIDE
Property damage: 5K
Reported by: LAW ENFORCEMENT

Trees and power lines were downed.

Lightning in CHARLES, MARYLAND
From 10-MAY-00 17:15:00 to 10-MAY-00 17:30:00 (EST)
Location: COUNTYWIDE
Reported by: NEWSPAPER

Several homes and businesses were struck by lightning.

Thunderstorm Wind in CHARLES, MARYLAND
From 10-MAY-00 17:30:00 to 10-MAY-00 17:30:00 (EST)
Location: WHITE PLAINS
Magnitude: 52 E
Reported by: TRAINED SPOTTER

A wind gust of 60 MPH was estimated.

Hail in CHARLES, MARYLAND
From 10-MAY-00 17:40:00 to 10-MAY-00 17:40:00 (EST)
Location: WALDORF
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Dime sized hail fell.

Thunderstorm Wind in CHARLES, MARYLAND
From 10-MAY-00 17:30:00 to 10-MAY-00 18:00:00 (EST)
Location: COUNTYWIDE
Property damage: 5K
Reported by: NEWSPAPER

Trees were downed.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 10-MAY-00 18:00:00 to 10-MAY-00 18:00:00 (EST)
Location: MECHANICSVILLE
Property damage: 2K
Reported by: EMERGENCY MANAGER

Trees were downed.

Hail in ST. MARY'S, MARYLAND
From 10-MAY-00 18:20:00 to 10-MAY-00 18:20:00 (EST)
Location: HOLLYWOOD
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Dime sized hail fell.

Thunderstorm Wind in CALVERT, MARYLAND
From 10-MAY-00 17:40:00 to 10-MAY-00 17:40:00 (EST)
Location: PRINCE FREDERICK
Property damage: 5K
Reported by: EMERGENCY MANAGER

Trees were downed.

Thunderstorm Wind in WASHINGTON, MARYLAND
From 10-MAY-00 13:30:00 to 10-MAY-00 13:30:00 (EST)
Location: SMITHSBURG
Magnitude: 52 E
Property damage: 2K
Reported by: TRAINED SPOTTER

Winds estimated at 60 MPH downed small trees.

Hail in WASHINGTON, MARYLAND
From 10-MAY-00 13:30:00 to 10-MAY-00 13:30:00 (EST)
Location: SMITHSBURG
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Dime sized hail fell.

Thunderstorm Wind in FREDERICK, MARYLAND
From 10-MAY-00 13:53:00 to 10-MAY-00 13:53:00 (EST)
Location: THURMONT
Property damage: 5K
Reported by: NEWSPAPER

A tree was downed onto a home.

Thunderstorm Wind in FREDERICK, MARYLAND
From 10-MAY-00 14:00:00 to 10-MAY-00 14:00:00 (EST)
Location: EMMITSBURG
Property damage: .1K
Reported by: NEWSPAPER

A pickup truck was lifted by high winds.

Funnel Cloud in FREDERICK, MARYLAND
From 10-MAY-00 14:00:00 to 10-MAY-00 14:00:00 (EST)
Location: EMMITSBURG
Reported by: NEWSPAPER

Hail in FREDERICK, MARYLAND
From 10-MAY-00 14:08:00 to 10-MAY-00 14:08:00 (EST)
Location: LADIESBURG
Magnitude: 2.50 
Reported by: TRAINED SPOTTER

Tennis ball sized hail fell.

Hail in CARROLL, MARYLAND
From 10-MAY-00 14:30:00 to 10-MAY-00 14:30:00 (EST)
Location: TANEYTOWN
Magnitude: 1.75 
Reported by: TRAINED SPOTTER

Quarter to golf ball sized hail fell.

Hail in CARROLL, MARYLAND
From 10-MAY-00 14:47:00 to 10-MAY-00 14:47:00 (EST)
Location: UNION BRIDGE
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Quarter sized hail fell.

Lightning in CARROLL, MARYLAND
From 10-MAY-00 14:55:00 to 10-MAY-00 14:55:00 (EST)
Location: NEW WINDSOR
Reported by: NEWSPAPER

A home was struck by lightning.

Hail in CARROLL, MARYLAND
From 10-MAY-00 14:48:00 to 10-MAY-00 15:02:00 (EST)
Location: WESTMINSTER
Magnitude: 1.75 
Reported by: TRAINED SPOTTER

Walnut to golfball sized hail fell.

Hail in CARROLL, MARYLAND
From 10-MAY-00 15:05:00 to 10-MAY-00 15:05:00 (EST)
Location: MANCHESTER
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Dime sized hail fell.

Hail in MONTGOMERY, MARYLAND
From 10-MAY-00 15:30:00 to 10-MAY-00 15:30:00 (EST)
Location: DAMASCUS
Magnitude: 0.75 
Reported by: EMERGENCY MANAGER

Dime sized hail fell.

Hail in MONTGOMERY, MARYLAND
From 10-MAY-00 15:50:00 to 10-MAY-00 15:50:00 (EST)
Location: DARNESTOWN
Magnitude: 0.75 
Reported by: EMERGENCY MANAGER

Dime sized hail fell.

Lightning in ANNE ARUNDEL, MARYLAND
From 10-MAY-00 10:24:00 to 10-MAY-00 10:24:00 (EST)
Location: RIVERA BEACH
Property damage: 110K
Reported by: NEWSPAPER

A lightning strike severely damaged a home.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 10-MAY-00 10:25:00 to 10-MAY-00 10:25:00 (EST)
Location: ANNAPOLIS
Property damage: 10K
Reported by: NEWSPAPER

Trees and power lines were downed.

Hail in MONTGOMERY, MARYLAND
From 10-MAY-00 10:25:00 to 10-MAY-00 10:25:00 (EST)
Location: SILVER SPG
Magnitude: 0.75 
Reported by: NWS EMPLOYEE(OFF DUTY)

Dime sized hail fell.

Hail in CARROLL, MARYLAND
From 10-MAY-00 14:25:00 to 10-MAY-00 14:25:00 (EST)
Location: TANEYTOWN
Magnitude: 2.50 
Property damage: 15K
Reported by: TRAINED SPOTTER

Tennis ball sized hail fell in Bruceville and Keymar and dented several cars.

Hail in CARROLL, MARYLAND
From 10-MAY-00 14:27:00 to 10-MAY-00 14:27:00 (EST)
Location: WESTMINSTER
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Quarter sized hail fell.

Hail in FREDERICK, MARYLAND
From 10-MAY-00 14:40:00 to 10-MAY-00 14:40:00 (EST)
Location: FREDERICK
Magnitude: 1.00 
Reported by: EMERGENCY MANAGER

Dime to quarter sized hail fell.

Hail in CARROLL, MARYLAND
From 10-MAY-00 15:50:00 to 10-MAY-00 15:50:00 (EST)
Location: ELDERSBURG
Magnitude: 2.00 
Property damage: 15K
Reported by: TRAINED SPOTTER

Walnut to hen egg sized hail fell and dented several cars.

Funnel Cloud in BALTIMORE CITY (C), MARYLAND
From 10-MAY-00 15:53:00 to 10-MAY-00 15:53:00 (EST)
Location: PIKESVILLE
Reported by: BROADCAST MEDIA