A cold front stalled across the Mid Atlantic and low pressure formed and moved along it. Southerly flow advected gulf moisture into the region and showers and thunderstorms easily formed. Heavy rain, hail, damaging winds and tornadoes occurred throughout the day.

Tornado in MONTGOMERY, MARYLAND
From 13-JUN-13 14:38:00 to 13-JUN-13 14:59:00 (EST-5)
Location: SENECA
Tornado F-scale: EF0
Property damage: 1.00K
Crop damage: 5.00K
Reported by: NWS Storm Survey

From eyewitness accounts, radar imagery and a ground survey concluded a long track EF-0 tornado occurred in Montgomery County MD on the afternoon of June 13, 2013.  Peak winds were estimated at 75 mph.  Damage was almost entirely from downed trees.  In that regard numerous homes and a few parked vehicles were damaged by trees falling onto them.
First damage was noted near the Bretton Woods golf course along River Road.  Damage continued along Bonnie Dale Drive and Glenhurst Ct where several trees were downed in the community.  Also, near the intersection of Turkey Foot Road and Jones Lane in southwest Montgomery County near North Potomac MD a few large trees were over the road.  The tornado raced east at nearly 60 mph to the northern section of Rockville MD.  At least 14 homes were significantly damaged by uprooted trees.  As it continued east to the Norbeck and Aspen Hill area 30 trees were uprooted in the Manor County Golf Club as well as numerous homes damaged in the surrounding communiteis from tree damage.  Tree damage was noted along the intercounty connector route 200 at the Layhill Road exit.  Finally a few trees were downed in Spencerville and Burtonsville.
Additionally there was a parallel 7 miles path of damage through South Rockville and Glenmont MD with similar tree damage.  This area was found to be straight line winds from the outflow just south of the tornado from the parent supercell storm.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 13-JUN-13 07:34:00 to 13-JUN-13 07:34:00 (EST-5)
Location: WOODENSBURG
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.25K
Reported by: NWS Employee

There was a large tree limb six inches in diameter down.

Thunderstorm Wind in HARFORD, MARYLAND
From 13-JUN-13 07:40:00 to 13-JUN-13 07:40:00 (EST-5)
Location: PYLESVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Emergency Manager

Trees were reported down.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 13-JUN-13 07:46:00 to 13-JUN-13 07:46:00 (EST-5)
Location: SWEET AIR
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.50K
Reported by: Emergency Manager

There was one tree down at 14910 Dunston Lane.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 13-JUN-13 08:30:00 to 13-JUN-13 08:30:00 (EST-5)
Location: ANNAPOLIS
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.50K
Reported by: Newspaper

A large tree fell next to the Annapolis Police Station on Taylor Street damaging a fence, a vehicle and breaking a window in the building.

Thunderstorm Wind in HARFORD, MARYLAND
From 13-JUN-13 07:55:00 to 13-JUN-13 07:55:00 (EST-5)
Location: GIBSON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Emergency Manager

There were trees reported down.

Thunderstorm Wind in WASHINGTON, MARYLAND
From 13-JUN-13 06:38:00 to 13-JUN-13 06:38:00 (EST-5)
Location: KEEDYSVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.50K
Reported by: Emergency Manager

There was a tree down at 18334 Mansfield Road in Keedysville Maryland.

Hail in FREDERICK, MARYLAND
From 13-JUN-13 06:40:00 to 13-JUN-13 06:40:00 (EST-5)
Location: WALKERSVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in FREDERICK, MARYLAND
From 13-JUN-13 07:01:00 to 13-JUN-13 07:01:00 (EST-5)
Location: JOHNSVILLE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CARROLL, MARYLAND
From 13-JUN-13 07:11:00 to 13-JUN-13 07:11:00 (EST-5)
Location: MC KINSTRYS
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CARROLL, MARYLAND
From 13-JUN-13 07:14:00 to 13-JUN-13 07:14:00 (EST-5)
Location: NEW WINDSOR
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in FREDERICK, MARYLAND
From 13-JUN-13 06:54:00 to 13-JUN-13 06:54:00 (EST-5)
Location: WOODSBORO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Emergency Manager

There were several trees down.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 13-JUN-13 14:45:00 to 13-JUN-13 14:45:00 (EST-5)
Location: GLEN
Magnitude: 52.00 EG
Property damage: 0.50K
Crop damage: 0.50K
Reported by: Trained Spotter

There were multiple 8 to 9 inch diameter tree branches knocked down and a basketball backboard broken off.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 13-JUN-13 14:49:00 to 13-JUN-13 14:49:00 (EST-5)
Location: ROCKVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.50K
Reported by: Public

A tree fell on a house on High Wood Drive in Rockville MD.

Thunderstorm Wind in FREDERICK, MARYLAND
From 13-JUN-13 06:59:00 to 13-JUN-13 06:59:00 (EST-5)
Location: LADIESBURG
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Emergency Manager

There were several trees down.

Hail in CARROLL, MARYLAND
From 13-JUN-13 07:17:00 to 13-JUN-13 07:17:00 (EST-5)
Location: SMALLWOOD
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 13-JUN-13 14:28:00 to 13-JUN-13 14:28:00 (EST-5)
Location: AVENUE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Emergency Manager

There were numerous trees down around Coltons Point.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 13-JUN-13 14:28:00 to 13-JUN-13 14:28:00 (EST-5)
Location: COMPTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.50K
Reported by: Trained Spotter

There was a large tree down across Army Road.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 13-JUN-13 14:28:00 to 13-JUN-13 14:28:00 (EST-5)
Location: COMPTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.50K
Reported by: Trained Spotter

There were two trees down in a yard along Tippit Road.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 13-JUN-13 14:32:00 to 13-JUN-13 14:32:00 (EST-5)
Location: REDGATE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.10K
Reported by: Trained Spotter

There were small branches about a half an inch in diameter and other debris swirling around in the strongest winds.  Estimated wind gusts in excess of 70 mph near and to the south of Leonardstown High School.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 13-JUN-13 14:37:00 to 13-JUN-13 14:37:00 (EST-5)
Location: VALLEY LEE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Emergency Manager

There were numerous trees down.

Hail in ST. MARY'S, MARYLAND
From 13-JUN-13 14:40:00 to 13-JUN-13 14:40:00 (EST-5)
Location: CHINGVILLE
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 13-JUN-13 14:49:00 to 13-JUN-13 14:49:00 (EST-5)
Location: ROCKVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Public

There were several trees down or split on the 700 Block of Smallwood Road.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 13-JUN-13 14:54:00 to 13-JUN-13 14:54:00 (EST-5)
Location: HOLLYWOOD PARK
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Emergency Manager

There were trees down.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 13-JUN-13 14:55:00 to 13-JUN-13 14:55:00 (EST-5)
Location: COLESVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.50K
Reported by: Broadcast Media

There was a tree down near the intersection of Randolph Road and New Hampshire Avenue.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 13-JUN-13 15:05:00 to 13-JUN-13 15:05:00 (EST-5)
Location: HIGH RIDGE
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.50K
Reported by: Emergency Manager

There was one tree uprooted into a house at 5900 Parkway Drive.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 13-JUN-13 15:06:00 to 13-JUN-13 15:06:00 (EST-5)
Location: HIGH RIDGE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.50K
Reported by: 911 Call Center

There was a tree down on Park Hall Drive near Sandy Spring Road.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 13-JUN-13 14:49:00 to 13-JUN-13 14:49:00 (EST-5)
Location: AUTREY PARK
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Emergency Manager

There were trees down.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 13-JUN-13 14:49:00 to 13-JUN-13 14:49:00 (EST-5)
Location: MONTGOMERY VLG
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.50K
Reported by: Trained Spotter

A tree snapped at Montgomery Village Golf Club.

Thunderstorm Wind in HOWARD, MARYLAND
From 13-JUN-13 15:06:00 to 13-JUN-13 15:06:00 (EST-5)
Location: NORTH LAUREL
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.50K
Reported by: 911 Call Center

There was a tree down at 10700 Scaggsville Road.

Thunderstorm Wind in HOWARD, MARYLAND
From 13-JUN-13 15:08:00 to 13-JUN-13 15:08:00 (EST-5)
Location: SAVAGE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.50K
Reported by: 911 Call Center

There was a tree down along All Saints Road.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 13-JUN-13 15:08:00 to 13-JUN-13 15:08:00 (EST-5)
Location: JESSUP
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: 911 Call Center

A tree fell onto a house in Jessup while another tree was down around Apple Ave and Orchard Av.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 13-JUN-13 15:45:00 to 13-JUN-13 15:45:00 (EST-5)
Location: REVELL
Magnitude: 52.00 EG
Property damage: 0.50K
Crop damage: 0.50K
Reported by: Fire Department/Rescue

There were trees and wires down.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 13-JUN-13 14:21:00 to 13-JUN-13 14:21:00 (EST-5)
Location: AVENUE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Trained Spotter

There were multiple 3 to 5 inch in diameter tree branches knocked down from Coltons Point and Waterloo Circle area to Coltons Point and Oakley Road area.

Tornado in ST. MARY'S, MARYLAND
From 13-JUN-13 14:24:00 to 13-JUN-13 14:42:00 (EST-5)
Location: OAKLEY
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 5.00K
Reported by: NWS Storm Survey

Damage was intermittent along the path and was confined to tree damage and damage resulting from downed trees.  Numerous large trees were uprooted and some trees were topped.  Many were noted in the vicinity of Oakley Road and Hodges Road between Old Rolling Road and Joan Drive and between Shady Mile Drive and Town Creek Road.
Thunderstorm wind damage also occurred across Coltons Point between Serenity Lane and Point Breeze Road.  Many large trees were uprooted in this area.

Tornado in ST. MARY'S, MARYLAND
From 13-JUN-13 14:42:00 to 13-JUN-13 14:45:00 (EST-5)
Location: SOTTERLEY
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 10.00K
Reported by: NWS Storm Survey

Peak winds are estimated to have been 70 mph and the tornado was on the ground for three minutes.  The tornado uprooted two oak trees that were one to two feet in diameter and snapped several others at their bases.  It blew the roof off of a farm outbuilding and caused additional damage to the wooden planks.  Several pine trees had their limbs ripped off.  Four to six inch diameter tree limbs were blown onto portions of Cage Farm Road.  Grassy fields surrounding the area indicate the tornado may have lifted and descended along its path.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 13-JUN-13 14:49:00 to 13-JUN-13 14:49:00 (EST-5)
Location: ROCKVILLE
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

This was reported by a hand held anemometer.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 13-JUN-13 15:04:00 to 13-JUN-13 15:04:00 (EST-5)
Location: AMMENDALE
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 13-JUN-13 14:41:00 to 13-JUN-13 14:41:00 (EST-5)
Location: LNRDTWN ST MARYS ARP
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 13-JUN-13 14:43:00 to 13-JUN-13 14:43:00 (EST-5)
Location: BEACHVILLE
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 13-JUN-13 14:47:00 to 13-JUN-13 14:47:00 (EST-5)
Location: LUXMANOR
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.50K
Reported by: Public

There was a tree down.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 13-JUN-13 14:27:00 to 13-JUN-13 14:27:00 (EST-5)
Location: COMPTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Public

There were multiple trees down along Lady Baltimore Ave.