A potent cold front passed through the area. Warm and humid conditions along with forcing from the boundary caused showers and thunderstorms to develop. Stronger winds aloft caused some storms to become severe.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 19-JUN-17 15:18:00 to 19-JUN-17 15:18:00 (EST-5)
Location: GREEN HAVEN
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree was down with wires on the road along the 800 block of South Shore Drive.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 19-JUN-17 15:21:00 to 19-JUN-17 15:21:00 (EST-5)
Location: PAROLE
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree fell onto a house along the 200 block of Gross Avenue.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 19-JUN-17 14:58:00 to 19-JUN-17 14:58:00 (EST-5)
Location: HILLMEADE
Magnitude: 50.00 EG
Reported by: Trained Spotter

Two large trees were down along the intersection of Silvergate lane and Silverbrook Way in Bowie.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 19-JUN-17 14:58:00 to 19-JUN-17 14:58:00 (EST-5)
Location: GREENBELT
Magnitude: 50.00 EG
Reported by: Other Federal Agency

A few trees were down on Goddard Space Flight Center's campus.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 19-JUN-17 15:49:00 to 19-JUN-17 15:49:00 (EST-5)
Location: BUDDS CREEK
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree was down along the 27000 block of Budds Creek Road.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 19-JUN-17 15:55:00 to 19-JUN-17 15:55:00 (EST-5)
Location: LEONARDTOWN
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree was down along the 23000 block of Maypole Road.

Thunderstorm Wind in CALVERT, MARYLAND
From 19-JUN-17 16:02:00 to 19-JUN-17 16:02:00 (EST-5)
Location: BOWENS
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree was down along Sixes road and Adelina Road.

Thunderstorm Wind in CALVERT, MARYLAND
From 19-JUN-17 16:05:00 to 19-JUN-17 16:05:00 (EST-5)
Location: STOAKLEY
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree was down along the 1700 block of German Chapel Road.

Thunderstorm Wind in CALVERT, MARYLAND
From 19-JUN-17 16:08:00 to 19-JUN-17 16:08:00 (EST-5)
Location: MACKALL
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree was down along the 2200 block of Leonard Drive.

Thunderstorm Wind in CALVERT, MARYLAND
From 19-JUN-17 16:15:00 to 19-JUN-17 16:15:00 (EST-5)
Location: WILSON
Magnitude: 50.00 EG
Reported by: 911 Call Center

Two trees were down at Wilson and Plum Point Roads.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 19-JUN-17 16:05:00 to 19-JUN-17 16:05:00 (EST-5)
Location: SANDGATES
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree was down along the 27000 Block of North Sandgates Road.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 19-JUN-17 16:30:00 to 19-JUN-17 16:30:00 (EST-5)
Location: PARK HALL ARPT
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree was down along the 20800 Block of Hermanville Road.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 19-JUN-17 16:31:00 to 19-JUN-17 16:31:00 (EST-5)
Location: HERMANVILLE
Magnitude: 50.00 EG
Reported by: Trained Spotter

A pine tree snapped in half at Three Notch Road and Wickshire Court.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 19-JUN-17 16:34:00 to 19-JUN-17 16:34:00 (EST-5)
Location: HERMANVILLE
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree was down along the 48000 Block of Long Lane.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 19-JUN-17 15:22:00 to 19-JUN-17 15:22:00 (EST-5)
Location: VENICE ON THE BAY
Magnitude: 50.00 MG
Reported by: Mesonet

A wind gust of 58 mph was measured.

Thunderstorm Wind in FREDERICK, MARYLAND
From 19-JUN-17 12:50:00 to 19-JUN-17 12:50:00 (EST-5)
Location: HANSONVILLE
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree fell in the roadway near the intersection of Sundays Lane and Pocono Court.

Tornado in MONTGOMERY, MARYLAND
From 19-JUN-17 14:49:00 to 19-JUN-17 14:50:00 (EST-5)
Location: KEMP MILL
Tornado F-scale: EF0
Reported by: NWS Storm Survey

The National Weather Service in Baltimore MD/Washington DC has confirmed a tornado in the Four Corners section of Silver Spring in Montgomery County Maryland on June 19, 2017.
The National Weather Service conducted a ground survey of the damaged community. The survey was greatly assisted by Montgomery Countys Office of Emergency Management. An eyewitness reported damaging winds blowing to the east,
followed immediately by damaging winds blowing west. This aligns with a small, weak rotation noted on FAAs Terminal Doppler Weather Radar located at Joint Base Andrews. The damage area was very compact, with most of the damage confined to a wooded community along a two block stretch of Dennis Avenue, between Royalton Road and Eastwood Avenue. Damage was entirely to trees and objects/homes that trees fell on. Most of the damage was to and the result of moderate sized branches of tulip poplars about 8 to 12 inches in diameter. Two trees were uprooted as well. Homes, vehicles, and power lines were damaged from falling trees and branches, with some homes rendered uninhabitable. No structural damage was noted that was not the result of falling trees. While much of the tree damage was from an easterly wind, there was damage noted in multiple directions. Most of the tree damage was to the higher branches. No injuries or fatalities were reported as of the evening of the survey. The entire event likely transpired in less than a minute.

Thunderstorm Wind in FREDERICK, MARYLAND
From 19-JUN-17 13:09:00 to 19-JUN-17 13:09:00 (EST-5)
Location: DOUBS
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree fell in the roadway along the 4800 Block of East Basford Road.

Thunderstorm Wind in FREDERICK, MARYLAND
From 19-JUN-17 13:23:00 to 19-JUN-17 13:23:00 (EST-5)
Location: NEW MARKET
Magnitude: 50.00 EG
Reported by: 911 Call Center

A tree fell across the roadway near the 5200 Block of Green Valley Road.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 19-JUN-17 14:37:00 to 19-JUN-17 14:37:00 (EST-5)
Location: CARDEROCK SPGS
Magnitude: 50.00 EG
Reported by: Emergency Manager

A tree was down and Blocking all lanes on Seven Locks Road near the intersection of Glennon Drive.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 19-JUN-17 14:45:00 to 19-JUN-17 14:45:00 (EST-5)
Location: HOMEWOOD
Magnitude: 50.00 EG
Reported by: Emergency Manager

At least six houses were damaged from trees at the intersection of Georgia Avenue and Dennis Avenue.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 19-JUN-17 14:49:00 to 19-JUN-17 14:49:00 (EST-5)
Location: BERWYN
Magnitude: 50.00 EG
Reported by: Park/Forest Service

Numerous large trees were down around Lake Artemesia.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 19-JUN-17 14:51:00 to 19-JUN-17 14:51:00 (EST-5)
Location: COLLEGE PARK
Magnitude: 50.00 EG
Reported by: SHAVE Project

A part of a tree was snapped off onto a portin of the road near the intersection of Adelphi Road and University Boulevard.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 19-JUN-17 14:54:00 to 19-JUN-17 14:54:00 (EST-5)
Location: GREENBELT
Magnitude: 50.00 EG
Reported by: Trained Spotter

A 12 to 14 inch in diameter tree fell onto the fence on Ridge Road.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 19-JUN-17 14:56:00 to 19-JUN-17 14:56:00 (EST-5)
Location: LARGO
Magnitude: 50.00 EG
Reported by: Department of Highways

A large tree limb fell in the road near MD 202 and Kettering Drive.