Low pressure tracked through the Ohio Valley and into the Great Lakes. The warm front associated with this system passed through our region during the first. Plenty of moisture from the Gulf of Mexico and the Atlantic Ocean combined with strong forcing associated with the warm front, causing thunderstorms to develop. Moderate instability along with strong forcing caused some thunderstorms to become severe.
Wind speed and direction changed rapidly with height near the warm front. This caused rotating thunderstorms, and some of them were able to produce tornadoes.

Thunderstorm Wind in CHARLES, MARYLAND
From 01-JUN-12 15:16:00 to 01-JUN-12 15:16:00 (EST-5)
Location: GLYMONT
Magnitude: 57.00 EG
Property damage: 5.00K
Reported by: 911 Call Center

A tree that was knocked down along Indian Head Highway caused damage to a vehicle and minor roof damage to a house.

Thunderstorm Wind in CHARLES, MARYLAND
From 01-JUN-12 15:22:00 to 01-JUN-12 15:22:00 (EST-5)
Location: MATTAWOMAN
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Emergency Manager

Trees were blown down along Evergreen Dr.

Tornado in ALLEGANY, MARYLAND
From 01-JUN-12 17:31:00 to 01-JUN-12 17:32:00 (EST-5)
Location: PINEY GROVE
Tornado F-scale: EF1
Property damage: 2.00K
Reported by: NWS Storm Survey

The tornado touched down near the intersection of Orleans Road NE and Turkey Farm Road NE. The track was nearly one mile long. The tornado snapped numerous trees and uprooted one large and several smaller trees.  Electrified fencing had to be repaired and trees removed from Turkey Farm Road NE.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 01-JUN-12 16:57:00 to 01-JUN-12 16:57:00 (EST-5)
Location: PIONEER CITY
Magnitude: 61.00 EG
Property damage: 2.00K
Reported by: Trained Spotter

Strong thunderstorm winds caused damage at the Fort Meade Commissary.

Thunderstorm Wind in ALLEGANY, MARYLAND
From 01-JUN-12 16:57:00 to 01-JUN-12 16:57:00 (EST-5)
Location: BOWLING GREEN
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

Trees were blown down along Moss Ave.

Thunderstorm Wind in ALLEGANY, MARYLAND
From 01-JUN-12 17:06:00 to 01-JUN-12 17:06:00 (EST-5)
Location: EVITTS CREEK
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

Trees were blown down along South Street at Franks Lane.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 01-JUN-12 13:08:00 to 01-JUN-12 13:08:00 (EST-5)
Location: DICKERSON
Magnitude: 52.00 EG
Property damage: 0.50K
Reported by: Broadcast Media

A large limb was snapped near Mount Ephraim Road and MD-28.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 01-JUN-12 13:54:00 to 01-JUN-12 13:54:00 (EST-5)
Location: BUCK LODGE
Magnitude: 52.00 EG
Property damage: 0.50K
Reported by: CoCoRaHS

Several large tree limbs were blown down from thunderstorm winds.

Thunderstorm Wind in BALTIMORE CITY (C), MARYLAND
From 01-JUN-12 18:33:00 to 01-JUN-12 18:33:00 (EST-5)
Location: FREDERICK RD
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Emergency Manager

Trees were blown down by strong thunderstorm winds.

Tornado in HARFORD, MARYLAND
From 01-JUN-12 16:56:00 to 01-JUN-12 16:59:00 (EST-5)
Location: BAGLEY
Tornado F-scale: EF1
Property damage: 300.00K
Reported by: NWS Storm Survey

Initial tree damage was noted in the Stoneybrook Community along Streamside Drive. The tornado crossed Mountain Road and then traveled along the many Strip Malls and Businesses along the Route 1-Belair Road Corridor in Pleasant Hills. Many downed trees and business signs were blown out. Roof and siding damage was also noted on several properties.
A dentist office in Bel Air lost a portion of its roof. Some signs and debris were carried a half mile along the tornado track.
The tornado reached its peak intensity along West Grove Avenue and Eutaw Place. The businesses in this area were severely damaged. Warehouses had their front doors and windows blown out and then had significant roof and wall damage as winds exited the structures. A light pickup truck was picked up by the wind and overturned. A small office and storage concrete block structure was unroofed and then had its walls blown in. The falling blocks fell on two men sheltering inside who were injured.
A nearby Wal-Mart parking lot had street sign and some tree damage. The tornado created chaotic tree damage along Harford Road just west of Connelly Road in a residential area before lifting.

Thunderstorm Wind in CARROLL, MARYLAND
From 01-JUN-12 14:21:00 to 01-JUN-12 14:21:00 (EST-5)
Location: GAMBER
Magnitude: 66.00 EG
Property damage: 2.00K
Reported by: NWS Storm Survey

A swath of mainly tree damage south of the tornado track appear to have been caused by winds from a rear flank downdraft.

Thunderstorm Wind in ALLEGANY, MARYLAND
From 01-JUN-12 17:06:00 to 01-JUN-12 17:06:00 (EST-5)
Location: CUMBERLAND
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

Trees were blown down at Robbins Terrace.

Thunderstorm Wind in BALTIMORE CITY (C), MARYLAND
From 01-JUN-12 18:41:00 to 01-JUN-12 18:41:00 (EST-5)
Location: BALTIMORE
Magnitude: 57.00 EG
Property damage: 1.00K
Reported by: Emergency Manager

Trees were blown down by strong thunderstorm winds.

Thunderstorm Wind in BALTIMORE CITY (C), MARYLAND
From 01-JUN-12 18:43:00 to 01-JUN-12 18:43:00 (EST-5)
Location: GOVANS
Magnitude: 57.00 EG
Property damage: 1.00K
Reported by: Emergency Manager

Trees were blown down along Chinquapin Parkway.

Thunderstorm Wind in WASHINGTON, MARYLAND
From 01-JUN-12 18:42:00 to 01-JUN-12 18:42:00 (EST-5)
Location: CORBETT
Magnitude: 50.00 EG
Property damage: 0.50K
Reported by: Fire Department/Rescue

A tree was blown down in Hagerstown.

Tornado in ANNE ARUNDEL, MARYLAND
From 01-JUN-12 18:06:00 to 01-JUN-12 18:22:00 (EST-5)
Location: TIPTON AAF ARPT
Tornado F-scale: EF0
Property damage: 100.00K
Reported by: NWS Storm Survey

Damage encountered along the circulation path was primarily trees, consisting of uprooted and snapped trees and limbs.
Minor damage was  noted to eaves and siding at an apartment complex along Disney Road, where tree damage was also found. Damage to trees was encountered along Carriage drive, Golden Pine Circle and Gesna Road, and to trees and house siding along Fairbanks Drive. A sun room on one house in this area suffered uplift of a portion of its roof, but uplift appears to be the result in large part of channeled wind.
A decaying tornado was observed by tower personnel and airport patrons crossing the western portion of a runway.

Thunderstorm Wind in CARROLL, MARYLAND
From 01-JUN-12 15:28:00 to 01-JUN-12 15:28:00 (EST-5)
Location: ALESIA
Magnitude: 57.00 EG
Property damage: 1.00K
Reported by: NWS Storm Survey

Two trees were knocked down at Millers Station Road and Rohrbaugh Road.

Hail in HOWARD, MARYLAND
From 01-JUN-12 15:30:00 to 01-JUN-12 15:30:00 (EST-5)
Location: GUILFORD
Magnitude: 1.75 
Reported by: Public

The report was taken during the NWS Storm Survey of the Scaggsville tornado.

Thunderstorm Wind in HOWARD, MARYLAND
From 01-JUN-12 15:34:00 to 01-JUN-12 15:34:00 (EST-5)
Location: GUILFORD
Magnitude: 57.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

Trees were knocked down near the intersection of Rustling Leaf and Snowden River Parkway.

Thunderstorm Wind in HOWARD, MARYLAND
From 01-JUN-12 15:35:00 to 01-JUN-12 15:35:00 (EST-5)
Location: JONESTOWN
Magnitude: 57.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

Multiple trees were blown down near the intersection of Old Annapolis Rd. and Red Branch Rd.

Thunderstorm Wind in BALTIMORE CITY (C), MARYLAND
From 01-JUN-12 18:44:00 to 01-JUN-12 18:44:00 (EST-5)
Location: MT ROYAL
Magnitude: 52.00 EG
Property damage: 0.50K
Reported by: Emergency Manager

Large tree limbs were knocked down along Clipper Mill Rd.

Thunderstorm Wind in BALTIMORE CITY (C), MARYLAND
From 01-JUN-12 18:45:00 to 01-JUN-12 18:45:00 (EST-5)
Location: RASPEBURG
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Emergency Manager

Trees were blown down by strong thunderstorm winds.

Thunderstorm Wind in FREDERICK, MARYLAND
From 01-JUN-12 20:00:00 to 01-JUN-12 20:00:00 (EST-5)
Location: UNIONVILLE
Magnitude: 50.00 EG
Property damage: 0.20K
Reported by: Public

Branches were knocked down from strong thunderstorm winds near the Happy Hounds Lodge.

Thunderstorm Wind in HARFORD, MARYLAND
From 01-JUN-12 19:44:00 to 01-JUN-12 19:44:00 (EST-5)
Location: PYLESVILLE
Magnitude: 61.00 EG
Reported by: Unknown

An estimated 70 mph gust was reported from a strong thunderstorm.

Thunderstorm Wind in HOWARD, MARYLAND
From 01-JUN-12 15:34:00 to 01-JUN-12 15:34:00 (EST-5)
Location: CLARKSVILLE
Magnitude: 57.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

Multiple trees were knocked down near the intersection of Broken Land Parkway and Cradlerock Way.

Thunderstorm Wind in HOWARD, MARYLAND
From 01-JUN-12 15:42:00 to 01-JUN-12 15:42:00 (EST-5)
Location: HANOVER
Magnitude: 57.00 EG
Property damage: 0.50K
Reported by: 911 Call Center

A tree was blocking the roadway near the intersection of Route 1 and Rowanberry Dr.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 01-JUN-12 15:57:00 to 01-JUN-12 15:57:00 (EST-5)
Location: BLADENSBURG
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Unknown

Multiple trees were blown down across train tracks near the town of Cheverly.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 01-JUN-12 15:46:00 to 01-JUN-12 15:46:00 (EST-5)
Location: OELLA
Magnitude: 57.00 EG
Property damage: 1.50K
Reported by: Fire Department/Rescue

A tree fell onto a house along Westchester Avenue.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 01-JUN-12 15:34:00 to 01-JUN-12 15:34:00 (EST-5)
Location: CLINTON
Magnitude: 52.00 EG
Property damage: 0.50K
Reported by: Trained Spotter

Trees were heavily damaged with limbs of 8 to 12 inches ripped off from strong thunderstorm winds.

Thunderstorm Wind in BALTIMORE CITY (C), MARYLAND
From 01-JUN-12 16:07:00 to 01-JUN-12 16:07:00 (EST-5)
Location: WALBROOK
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees were blown down by strong thunderstorm winds.

Thunderstorm Wind in BALTIMORE CITY (C), MARYLAND
From 01-JUN-12 16:12:00 to 01-JUN-12 16:12:00 (EST-5)
Location: WALBROOK
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Emergency Manager

Trees were knocked down by strong thunderstorm winds along Druid Park Dr.

Thunderstorm Wind in BALTIMORE CITY (C), MARYLAND
From 01-JUN-12 16:16:00 to 01-JUN-12 16:16:00 (EST-5)
Location: HAMPDEN
Magnitude: 52.00 EG
Property damage: 0.50K
Reported by: Emergency Manager

Large tree limbs were blown down along Cloverhill Rd.

Tornado in MONTGOMERY, MARYLAND
From 01-JUN-12 13:29:00 to 01-JUN-12 13:32:00 (EST-5)
Location: PURDUM
Tornado F-scale: EF0
Property damage: 5.00K
Reported by: NWS Storm Survey

A tornado uprooted nearly two dozen trees in a wooded area along western sections of Kings Valley Drive between Kingstead and Mountain View Road. The tornado produced roofing damage to a barn in the 11000 Block of Mountain View Road.

Thunderstorm Wind in BALTIMORE CITY (C), MARYLAND
From 01-JUN-12 16:14:00 to 01-JUN-12 16:14:00 (EST-5)
Location: HAMPDEN
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Emergency Manager

Trees were blown down by strong thunderstorm winds.

Thunderstorm Wind in FREDERICK, MARYLAND
From 01-JUN-12 16:16:00 to 01-JUN-12 16:16:00 (EST-5)
Location: JEFFERSON
Magnitude: 52.00 EG
Property damage: 0.50K
Reported by: Fire Department/Rescue

A tree was knocked down along Poffenberger Road.

Thunderstorm Wind in BALTIMORE CITY (C), MARYLAND
From 01-JUN-12 16:18:00 to 01-JUN-12 16:18:00 (EST-5)
Location: GOVANS
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees were blown down along Halwyn Ave.

Thunderstorm Wind in BALTIMORE CITY (C), MARYLAND
From 01-JUN-12 16:18:00 to 01-JUN-12 16:18:00 (EST-5)
Location: HAMPDEN
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Emergency Manager

Trees were blown down along Deepdene Rd.

Tornado in CARROLL, MARYLAND
From 01-JUN-12 13:48:00 to 01-JUN-12 13:49:00 (EST-5)
Location: MT AIRY
Tornado F-scale: EF0
Property damage: 5.00K
Reported by: NWS Storm Survey

The tornado produced sporadic damage near Twin Arch road. There were about two dozen trees uprooted along with large limbs snapped.

Tornado in HOWARD, MARYLAND
From 01-JUN-12 13:52:00 to 01-JUN-12 13:54:00 (EST-5)
Location: WATERSVILLE JCT
Tornado F-scale: EF1
Property damage: 5.00K
Reported by: NWS Storm Survey

Intitial tornado damage occurred to trees along west Watersville Road just north of Old Frederick Road. The tornado tracked northeast across a large wooded area of West Watersville Road where a swath of large Hardwood trees were either snapped or uprooted.
An area of intense damage consistent with EF-1 level winds was noted in the 500 Block of West Watersville Road where 30 to 40 large Hardwood trees up to two feet in diameter were uprooted or snapped twenty feet up.

Tornado in PRINCE GEORGE'S, MARYLAND
From 01-JUN-12 16:27:00 to 01-JUN-12 16:28:00 (EST-5)
Location: BUENA VISTA
Tornado F-scale: EF0
Property damage: 2.00K
Reported by: NWS Storm Survey

A short narrow damage path was encountered between Meadowhill Road and Forbes Boulevard, consisting of spotty tree damage. The debris field exhibited evidence of cyclonic curvature consistent with a weak EF-0 tornado.

Tornado in CARROLL, MARYLAND
From 01-JUN-12 14:21:00 to 01-JUN-12 14:30:00 (EST-5)
Location: EASTVIEW
Tornado F-scale: EF1
Property damage: 200.00K
Reported by: NWS Storm Survey

The tornado snapped and uprooted several trees along the 2600 Block of Bird View Road. The most concentrated damage was focused along and north off Green Mill Road where numerous hardwood trees were uprooted and snapped, with some tree trunk diameters in excess of two feet. A tree fell onto a house, leaving that residence uninhabitable.
The tornado tracked across MD State Route 140, after passing near the Finksburg Library, producing scattered tree damage.

Thunderstorm Wind in BALTIMORE CITY (C), MARYLAND
From 01-JUN-12 16:18:00 to 01-JUN-12 16:18:00 (EST-5)
Location: HAMPDEN
Magnitude: 52.00 EG
Property damage: 0.50K
Reported by: Emergency Manager

Large tree limbs were knocked down from strong thunderstorm winds.

Thunderstorm Wind in BALTIMORE CITY (C), MARYLAND
From 01-JUN-12 16:18:00 to 01-JUN-12 16:18:00 (EST-5)
Location: HAMPDEN
Magnitude: 52.00 EG
Property damage: 0.50K
Reported by: Emergency Manager

Large tree limbs were blown down along Putney Way.

Thunderstorm Wind in BALTIMORE CITY (C), MARYLAND
From 01-JUN-12 16:19:00 to 01-JUN-12 16:19:00 (EST-5)
Location: GOVANS
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Emergency Manager

Trees were knocked down along Dartmouth Rd.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 01-JUN-12 16:48:00 to 01-JUN-12 16:48:00 (EST-5)
Location: FORK
Magnitude: 57.00 EG
Property damage: 0.50K
Reported by: Department of Highways

A tree was blown down along Maryland 147 between Glen Arm and Fort Rd.

Tornado in MONTGOMERY, MARYLAND
From 01-JUN-12 14:09:00 to 01-JUN-12 14:11:00 (EST-5)
Location: CEDAR GROVE
Tornado F-scale: EF0
Property damage: 50.00K
Reported by: NWS Storm Survey

The tornado caused tree damage along Pleasant View Lane. Some shingles were blown off house roofs and trees fell onto several homes and power lines. A house in the 23700 Block of Woodfield Road had minor damage to its eaves on the northeast-facing side.
The tornado caused tree damage and minor structure damage to one home along Echo Creek Court.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 01-JUN-12 16:24:00 to 01-JUN-12 16:24:00 (EST-5)
Location: PADONIA
Magnitude: 57.00 EG
Property damage: 1.00K
Reported by: Fire Department/Rescue

Trees were blown down along Interstate 83.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 01-JUN-12 16:27:00 to 01-JUN-12 16:27:00 (EST-5)
Location: ROGERS FORGE
Magnitude: 61.00 EG
Property damage: 7.00K
Reported by: Public

Large trees were uprooted and snapped in the area of Fellowship Forest. Several of the trees fell onto houses.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 01-JUN-12 16:27:00 to 01-JUN-12 16:27:00 (EST-5)
Location: ROGERS FORGE
Magnitude: 61.00 EG
Property damage: 0.50K
Reported by: Broadcast Media

A large tree was uprooted along Stevenson Lane.

Tornado in HOWARD, MARYLAND
From 01-JUN-12 15:29:00 to 01-JUN-12 15:32:00 (EST-5)
Location: SCAGGSVILLE
Tornado F-scale: EF0
Property damage: 100.00K
Reported by: NWS Storm Survey

The tornado topped a few trees in a neighborhood just north of Hammond Middle School and south of the 10500 Block of Gorman Road.
The tornado uprooted and topped trees at the end of Broad Cloth Way. The most intense damage was in the 7400 Block of Weather Worn Way near the intersection with Eden Brook Drive, where about two dozen mature hardwood trees were uprooted and snapped behind two homes. There was roof damage to a house after a large tree fell onto it, and another home across fro a Day Care Center on Eden Brook had its chimney blown over.
After passing north of Eden Brook Driver near First League, tornado damage was more intermittent, with several trees topped. One large limb fell on a house on Kindler Road at Single Wheel Path. The tornado lifted before crossing Route 32. An eyewitness on Route 32 near Interstate 95 approximately two miles away observed the tornado just before it lifted.

Tornado in ANNE ARUNDEL, MARYLAND
From 01-JUN-12 16:46:00 to 01-JUN-12 16:47:00 (EST-5)
Location: (FME)TIPTON AAF FT M
Tornado F-scale: EF0
Property damage: 3.00K
Reported by: NWS Storm Survey

Damage consisted entirely of uprooted and snapped healthy trees along a brief and concentrated path that began near Lemon Bridge Road and Wildlife Loop South and ended near South Road and Wildlife South. In this portion of the forest, several trees were uprooted or snapped, with other adjacent trees exhibiting snapped limbs.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 01-JUN-12 16:29:00 to 01-JUN-12 16:29:00 (EST-5)
Location: ST MARYS CITY
Magnitude: 50.00 EG
Property damage: 0.50K
Reported by: Trained Spotter

A tree was blown down near the intersection of Baur Road and Smithfield Drive.

Thunderstorm Wind in BALTIMORE CITY (C), MARYLAND
From 01-JUN-12 16:04:00 to 01-JUN-12 16:04:00 (EST-5)
Location: WALBROOK
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Emergency Manager

Trees were blown down along Burleith Ave.

Thunderstorm Wind in BALTIMORE CITY (C), MARYLAND
From 01-JUN-12 16:18:00 to 01-JUN-12 16:18:00 (EST-5)
Location: ROLAND PARK
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Emergency Manager

Trees were blown down by strong thunderstorm winds.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 01-JUN-12 16:20:00 to 01-JUN-12 16:20:00 (EST-5)
Location: LUTHERVILLE
Magnitude: 52.00 EG
Property damage: 1.50K
Reported by: Broadcast Media

A large tree fell on a home along Chestnut Ave.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 01-JUN-12 16:27:00 to 01-JUN-12 16:27:00 (EST-5)
Location: PADONIA
Magnitude: 61.00 EG
Property damage: 5.00K
Reported by: Emergency Manager

There was damage from trees blown down by strong thunderstorm winds at the Pine Ridge Golf Course and the adjacent neighborhood.

Thunderstorm Wind in CARROLL, MARYLAND
From 01-JUN-12 15:15:00 to 01-JUN-12 15:15:00 (EST-5)
Location: HOUCKSVILLE
Magnitude: 61.00 EG
Property damage: 1.00K
Reported by: NWS Storm Survey

Two trees were blown down near Coon Club Road at Academy Drive.

Thunderstorm Wind in CHARLES, MARYLAND
From 01-JUN-12 15:21:00 to 01-JUN-12 15:21:00 (EST-5)
Location: MARSHALL HALL
Magnitude: 57.00 EG
Property damage: 1.00K
Reported by: Emergency Manager

Trees were blown down along Penguin Pl. road.

Thunderstorm Wind in FREDERICK, MARYLAND
From 01-JUN-12 19:58:00 to 01-JUN-12 19:58:00 (EST-5)
Location: NEW LONDON
Magnitude: 50.00 EG
Property damage: 0.50K
Reported by: Fire Department/Rescue

A tree was blown down at the intersection of Green Valley Road and Limeplant Road.

Tornado in MONTGOMERY, MARYLAND
From 01-JUN-12 13:37:00 to 01-JUN-12 13:38:00 (EST-5)
Location: POOLESVILLE
Tornado F-scale: EF0
Property damage: 5.00K
Reported by: NWS Storm Survey

Damage was observed to about a dozen trees and a street sign on Mount Ebo Road.
A video recording made at the time showed the tornado touching down where the damage occurred.