A cold front approached the area on the 9th. Ahead of the front, warm and humid air led to unstable conditions. The instability combined with the boundary and an upper-level disturbance to trigger showers and thunderstorms on the afternoon and evening hours of the 9th. Some thunderstorms became severe, producing large hail and damaging winds.

Hail in WASHINGTON, MARYLAND
From 09-JUN-09 14:40:00 to 09-JUN-09 14:40:00 (EST-5)
Location: HAGERSTOWN
Magnitude: 1.00 
Reported by: Trained Spotter

Quarter size hail was reported in Hagerstown.

Hail in WASHINGTON, MARYLAND
From 09-JUN-09 14:32:00 to 09-JUN-09 14:32:00 (EST-5)
Location: PARAMT
Magnitude: 0.75 
Reported by: Trained Spotter

Penny size hail was reported near Long Meadow.

Hail in FREDERICK, MARYLAND
From 09-JUN-09 15:14:00 to 09-JUN-09 15:14:00 (EST-5)
Location: WOODSBORO
Magnitude: 0.75 
Reported by: Trained Spotter

Penny size hail was reported near Woodsboro.

Hail in CARROLL, MARYLAND
From 09-JUN-09 15:24:00 to 09-JUN-09 15:24:00 (EST-5)
Location: WESTMINSTER
Magnitude: 0.75 
Reported by: Trained Spotter

Penny size hail was reported near Westminster.

Hail in CARROLL, MARYLAND
From 09-JUN-09 15:26:00 to 09-JUN-09 15:26:00 (EST-5)
Location: WESTMINSTER
Magnitude: 0.88 
Reported by: Trained Spotter

Nickel size hail was reported near Westminster.

Hail in BALTIMORE, MARYLAND
From 09-JUN-09 15:49:00 to 09-JUN-09 15:49:00 (EST-5)
Location: SWEET AIR
Magnitude: 0.88 
Reported by: Trained Spotter

Nickel size hail was reported near Butler.

Hail in PRINCE GEORGE'S, MARYLAND
From 09-JUN-09 16:40:00 to 09-JUN-09 16:40:00 (EST-5)
Location: RITCHIE
Magnitude: 0.75 
Reported by: Trained Spotter

Penny size hail was reported near Largo.

Hail in HARFORD, MARYLAND
From 09-JUN-09 16:24:00 to 09-JUN-09 16:24:00 (EST-5)
Location: JARRETTSVILLE
Magnitude: 1.00 
Reported by: Public

Quarter size hail was reported near Jarrettsville.

Thunderstorm Wind in FREDERICK, MARYLAND
From 09-JUN-09 15:28:00 to 09-JUN-09 15:28:00 (EST-5)
Location: KEMPTOWN
Magnitude: 50.00 EG
Reported by: Trained Spotter

An tree eight inches in diameter was blown down.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 09-JUN-09 16:04:00 to 09-JUN-09 16:04:00 (EST-5)
Location: ROGERS FORGE
Magnitude: 50.00 EG
Reported by: Trained Spotter

Trees and large branches were down, and there were also power outages in Towson.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 09-JUN-09 16:25:00 to 09-JUN-09 16:25:00 (EST-5)
Location: PERRY HALL
Magnitude: 50.00 EG
Reported by: Public

A large tree was down at Seven Courts Drive and Bourbon Street.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 09-JUN-09 16:20:00 to 09-JUN-09 16:20:00 (EST-5)
Location: KENT VLG
Magnitude: 50.00 EG
Reported by: Public

Large oak trees were down near Kent Village.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 09-JUN-09 16:35:00 to 09-JUN-09 16:35:00 (EST-5)
Location: EDGEWATER
Magnitude: 50.00 EG
Reported by: Public

Winds were estimated at 50 knots.

Hail in WASHINGTON, MARYLAND
From 09-JUN-09 14:12:00 to 09-JUN-09 14:12:00 (EST-5)
Location: PECKTONVILLE
Magnitude: 0.88 
Reported by: Public

Nickel size hail was reported near Pecktonville.

Hail in WASHINGTON, MARYLAND
From 09-JUN-09 14:15:00 to 09-JUN-09 14:15:00 (EST-5)
Location: (HGR)HAGERSTOWN RGNL
Magnitude: 1.00 
Reported by: Trained Spotter

Quarter size hail was reported near Hagerstown.

Hail in HARFORD, MARYLAND
From 09-JUN-09 16:15:00 to 09-JUN-09 16:15:00 (EST-5)
Location: ROCKS
Magnitude: 1.75 
Reported by: Public

Golf ball size hail was reported near Chrome Hill.

Hail in HARFORD, MARYLAND
From 09-JUN-09 16:16:00 to 09-JUN-09 16:16:00 (EST-5)
Location: JARRETTSVILLE
Magnitude: 1.00 
Reported by: Trained Spotter

Quarter size hail was reported near Jarrettsville.

Hail in ANNE ARUNDEL, MARYLAND
From 09-JUN-09 16:17:00 to 09-JUN-09 16:17:00 (EST-5)
Location: MAYFIELD
Magnitude: 0.75 
Reported by: Trained Spotter

Penny size hail was reported near Ridgeway.

Hail in BALTIMORE, MARYLAND
From 09-JUN-09 16:30:00 to 09-JUN-09 16:30:00 (EST-5)
Location: MIDDLE RIVER
Magnitude: 0.88 
Reported by: Trained Spotter

Nickel size hail was reported near Essex.

Hail in BALTIMORE, MARYLAND
From 09-JUN-09 16:33:00 to 09-JUN-09 16:33:00 (EST-5)
Location: POPLAR
Magnitude: 0.88 
Reported by: Trained Spotter

Nickel size hail was reported near Rossville.

Hail in HARFORD, MARYLAND
From 09-JUN-09 16:43:00 to 09-JUN-09 16:43:00 (EST-5)
Location: MAGNOLIA
Magnitude: 0.75 
Reported by: Trained Spotter

Penny size hail was reported near Magnolia.

Hail in PRINCE GEORGE'S, MARYLAND
From 09-JUN-09 16:17:00 to 09-JUN-09 16:17:00 (EST-5)
Location: GREENBELT
Magnitude: 0.75 
Reported by: NWS Employee

Penny size hail was reported at the intersection of Interstate 495 and the Baltimore-Washington Parkway.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 09-JUN-09 16:25:00 to 09-JUN-09 16:25:00 (EST-5)
Location: CROWNSVILLE
Magnitude: 56.00 MG
Reported by: Trained Spotter

A wind gust of 65 mph was measured near Crownsville.

Hail in WASHINGTON, MARYLAND
From 09-JUN-09 14:30:00 to 09-JUN-09 14:30:00 (EST-5)
Location: HAGERSTOWN
Magnitude: 0.75 
Reported by: Trained Spotter

Penny size hail was reported in Hagerstown.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 09-JUN-09 16:19:00 to 09-JUN-09 16:19:00 (EST-5)
Location: BENFIELD
Magnitude: 50.00 EG
Reported by: Trained Spotter

Thunderstorm wind gusts were estimated around 50 knots.

Tornado in BALTIMORE, MARYLAND
From 09-JUN-09 16:21:00 to 09-JUN-09 16:22:00 (EST-5)
Location: ST HELENA
Tornado F-scale: EF0
Reported by: NWS Storm Survey

National Weather Service survey indicated that a tornado touched down near the Oak Lawn Cemetery and it continued towards Plainfield Road. The path length was about one mile and the path width was 150 yards. The tornado was an EF-0 with peak winds estimated at 70 mph.
Several trees were snapped or uprooted along the path. The tornado was also responsible for structure damage to three townhouses on Berkshire Lane.