A cold front moved south through the region. Southerly flow ahead of the front led to an unstable air mass, which combined with steepening mid level lapse rates and increased sheer led to numerous severe thunderstorms being triggered right ahead of the front.

Hail in BALTIMORE, MARYLAND
From 23-JUN-15 16:36:00 to 23-JUN-15 16:36:00 (EST-5)
Location: PADONIA
Magnitude: 1.75 
Reported by: Broadcast Media

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 23-JUN-15 17:03:00 to 23-JUN-15 17:03:00 (EST-5)
Location: MIDDLEBROOK
Magnitude: 61.00 EG
Property damage: 2.00K
Reported by: NWS Employee

Five large southern pine trees were snapped off 10 feet above the ground. 1 large oak tree was knocked over. All occurred at the intersection of Wisteria Dr. and Great Seneca Hwy.

Thunderstorm Wind in CHARLES, MARYLAND
From 23-JUN-15 18:59:00 to 23-JUN-15 19:04:00 (EST-5)
Location: RISON
Magnitude: 70.00 EG
Property damage: 8.00K
Reported by: NWS Storm Survey

Dozens of tall and large trees were knocked over near the bend in Stump Neck Rd. Additional damage was surveyed at 5255 Hwy 224 where multiple large trees were toppled over. A 16 inch tree was snapped at the top, falling on top of a boat. Numerous large limbs were scattered around. Around 6 telephone poles were reported knocked over at the Naval Annex. The base was closed due to extensive damage.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 23-JUN-15 17:13:00 to 23-JUN-15 17:13:00 (EST-5)
Location: POOLESVILLE
Magnitude: 52.00 EG
Property damage: 3.00K
Reported by: Trained Spotter

Numerous trees were reported down around town. Poolesville was without power for an extended period of time.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 23-JUN-15 18:17:00 to 23-JUN-15 18:17:00 (EST-5)
Location: SHADYSIDE ARPT
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

A tree was reported down at the intersection of Lavender Court and Muddy Creek Rd.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 23-JUN-15 20:05:00 to 23-JUN-15 20:05:00 (EST-5)
Location: (NHK)NAS PATUXENT RI
Magnitude: 61.00 EG
Property damage: 2.00K
Reported by: Other Federal Agency

Two telephone poles were reported pushed over by high winds.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 23-JUN-15 18:13:00 to 23-JUN-15 18:13:00 (EST-5)
Location: PAROLE
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

A tree was reported down at the intersection of Route 2 and Route 450.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 23-JUN-15 18:20:00 to 23-JUN-15 18:20:00 (EST-5)
Location: CHURCHTON
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

A tree was reported down at the intersection of Deale Churchton Rd and Deale Beach Rd.

Hail in BALTIMORE, MARYLAND
From 23-JUN-15 16:21:00 to 23-JUN-15 16:21:00 (EST-5)
Location: PADONIA
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in BALTIMORE, MARYLAND
From 23-JUN-15 16:36:00 to 23-JUN-15 16:36:00 (EST-5)
Location: HARRISONVILLE
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in BALTIMORE, MARYLAND
From 23-JUN-15 17:07:00 to 23-JUN-15 17:07:00 (EST-5)
Location: TEXAS
Magnitude: 1.75 
Reported by: Trained Spotter

Thunderstorm Wind in HOWARD, MARYLAND
From 23-JUN-15 16:57:00 to 23-JUN-15 16:57:00 (EST-5)
Location: LISBON
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Department of Highways

A tree was reported down blocking Carrs Mill Rd.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 23-JUN-15 17:51:00 to 23-JUN-15 17:51:00 (EST-5)
Location: EARLEIGH HGTS
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

A tree was reported down at the intersection of Route 2 and Route 648.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 23-JUN-15 17:29:00 to 23-JUN-15 17:29:00 (EST-5)
Location: LYNCH PT
Magnitude: 52.00 EG
Reported by: Park/Forest Service

A tree was reported down in North Point State Park.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 23-JUN-15 17:25:00 to 23-JUN-15 17:25:00 (EST-5)
Location: LYNCH PT
Magnitude: 52.00 EG
Reported by: Public

A few large branches 4-5 ft were reported down.

Hail in BALTIMORE, MARYLAND
From 23-JUN-15 16:33:00 to 23-JUN-15 16:33:00 (EST-5)
Location: ASHLAND
Magnitude: 1.50 
Reported by: Trained Spotter

Multiple cars and homes reported busted windows.

Hail in BALTIMORE, MARYLAND
From 23-JUN-15 16:35:00 to 23-JUN-15 16:35:00 (EST-5)
Location: COCKEYSVILLE
Magnitude: 1.75 
Reported by: Broadcast Media

Reported by Kbal-tv Baltimore.

Hail in BALTIMORE, MARYLAND
From 23-JUN-15 16:38:00 to 23-JUN-15 16:38:00 (EST-5)
Location: TEXAS
Magnitude: 1.75 
Reported by: Trained Spotter

Hail in BALTIMORE, MARYLAND
From 23-JUN-15 16:33:00 to 23-JUN-15 16:33:00 (EST-5)
Location: ASHLAND
Magnitude: 3.00 
Reported by: Broadcast Media

Thunderstorm Wind in HARFORD, MARYLAND
From 23-JUN-15 16:40:00 to 23-JUN-15 16:40:00 (EST-5)
Location: GIBSON
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Department of Highways

A tree was reported down in front of C Milton Wright High School.

Hail in BALTIMORE, MARYLAND
From 23-JUN-15 16:36:00 to 23-JUN-15 16:36:00 (EST-5)
Location: PADONIA
Magnitude: 4.00 
Reported by: Public

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 23-JUN-15 17:56:00 to 23-JUN-15 17:56:00 (EST-5)
Location: BARNESVILLE
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Department of Highways

A tree was reported down, blocking the southbound lane of MD109 at Barnesville Rd.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 23-JUN-15 16:52:00 to 23-JUN-15 16:52:00 (EST-5)
Location: DAMASCUS
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Social Media

A tree was reported down across Valley Park Dr.

Thunderstorm Wind in HARFORD, MARYLAND
From 23-JUN-15 16:33:00 to 23-JUN-15 16:33:00 (EST-5)
Location: FOREST HILL
Magnitude: 61.00 EG
Reported by: Social Media

A tree was severely damaged with multiple large limbs broken.

Thunderstorm Wind in HARFORD, MARYLAND
From 23-JUN-15 16:19:00 to 23-JUN-15 16:19:00 (EST-5)
Location: PYLESVILLE
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Social Media

A large tree was reported down.

Thunderstorm Wind in HARFORD, MARYLAND
From 23-JUN-15 16:19:00 to 23-JUN-15 16:19:00 (EST-5)
Location: PYLESVILLE
Magnitude: 52.00 EG
Reported by: Public

A large pine tree was reported split in half.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 23-JUN-15 16:36:00 to 23-JUN-15 16:36:00 (EST-5)
Location: ASHLAND
Magnitude: 61.00 EG
Property damage: 5.00K
Reported by: Broadcast Media

Extensive damage was reported just east of Cockeysville, MD with numerous trees reported down, windows of cars and homes smashed and holes in the siding of homes. Reported by Fox 45.

Thunderstorm Wind in HOWARD, MARYLAND
From 23-JUN-15 17:19:00 to 23-JUN-15 17:19:00 (EST-5)
Location: EAST LIOAK
Magnitude: 61.00 EG
Property damage: 3.00K
Reported by: Public

Two large trees were reported down, along with 1 tree uprooted and 1 chimney knocked down.

Thunderstorm Wind in HARFORD, MARYLAND
From 23-JUN-15 16:12:00 to 23-JUN-15 16:12:00 (EST-5)
Location: WHITEFORD
Magnitude: 52.00 EG
Property damage: 2.00K
Reported by: Public

Multiple trees reported down along Whiteford Rd.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 23-JUN-15 17:11:00 to 23-JUN-15 17:11:00 (EST-5)
Location: LAYTONSVILLE
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Public

Multiple trees were reported down in North Laytonsville.

Thunderstorm Wind in HARFORD, MARYLAND
From 23-JUN-15 16:14:00 to 23-JUN-15 16:14:00 (EST-5)
Location: WHITEFORD
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Public

Multiple trees down at 2520 Whiteford Rd.

Thunderstorm Wind in FREDERICK, MARYLAND
From 23-JUN-15 16:12:00 to 23-JUN-15 16:12:00 (EST-5)
Location: CATOCTIN STATION
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

A tree was reported down near the 2200 block of Point of Rocks Rd.

Thunderstorm Wind in FREDERICK, MARYLAND
From 23-JUN-15 16:33:00 to 23-JUN-15 16:33:00 (EST-5)
Location: LIBERTYTOWN
Magnitude: 52.00 EG
Property damage: 2.00K
Reported by: 911 Call Center

Multiple trees were down on wires near the 10800 block on Daysville Rd.

Thunderstorm Wind in FREDERICK, MARYLAND
From 23-JUN-15 16:41:00 to 23-JUN-15 16:41:00 (EST-5)
Location: URBANA
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

Multiple trees down at the intersection of Thurston Rd and Dr. Perry Rd.

Thunderstorm Wind in FREDERICK, MARYLAND
From 23-JUN-15 16:11:00 to 23-JUN-15 16:11:00 (EST-5)
Location: MT VILLE
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

Multiple trees down at the intersection of Mountville Rd and Winchester St.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 23-JUN-15 16:12:00 to 23-JUN-15 16:12:00 (EST-5)
Location: BROWNINGSVILLE
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

A tree was reported down across Kemptown Church Rd.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 23-JUN-15 16:53:00 to 23-JUN-15 16:53:00 (EST-5)
Location: FORK
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Department of Highways

A tree blocked the intersection of Route 147 and Sunshine Ave.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 23-JUN-15 17:00:00 to 23-JUN-15 17:00:00 (EST-5)
Location: BEALLSVILLE
Magnitude: 61.00 EG
Property damage: 6.00K
Reported by: Broadcast Media

A barn was heavily damaged with the grain solo completely destroyed. Numerous trees were also reported downed. Reported by WJLA.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 23-JUN-15 16:58:00 to 23-JUN-15 16:58:00 (EST-5)
Location: BARNESVILLE
Magnitude: 61.00 EG
Property damage: 1.00K
Reported by: Department of Highways

A tree was reported blocking the southbound lane of MD109 at Barnesville Rd.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 23-JUN-15 17:12:00 to 23-JUN-15 17:12:00 (EST-5)
Location: POOLESVILLE
Magnitude: 52.00 EG
Property damage: 2.00K
Reported by: Emergency Manager

Multiple trees and wires were reported down.

Thunderstorm Wind in HARFORD, MARYLAND
From 23-JUN-15 16:25:00 to 23-JUN-15 16:25:00 (EST-5)
Location: ADY
Magnitude: 50.00 MG
Reported by: Mesonet

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 23-JUN-15 17:04:00 to 23-JUN-15 17:04:00 (EST-5)
Location: PURDUM
Magnitude: 51.00 MG
Reported by: Mesonet

Reported at Dnscs.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 23-JUN-15 17:19:00 to 23-JUN-15 17:19:00 (EST-5)
Location: CEDAR GROVE
Magnitude: 56.00 MG
Reported by: Mesonet

Reported at Grmcg.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 23-JUN-15 17:50:00 to 23-JUN-15 17:50:00 (EST-5)
Location: POOLESVILLE
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Emergency Manager

Multiple trees and wires down.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 23-JUN-15 17:20:00 to 23-JUN-15 17:20:00 (EST-5)
Location: BRINKLOW
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Department of Highways

A tree was reported down across Route 650 near the intersection of Gold Mine.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 23-JUN-15 17:10:00 to 23-JUN-15 17:10:00 (EST-5)
Location: CLOPPER
Magnitude: 50.00 MG
Reported by: Mesonet

Thunderstorm Wind in CHARLES, MARYLAND
From 23-JUN-15 19:02:00 to 23-JUN-15 19:02:00 (EST-5)
Location: RISON
Magnitude: 61.00 EG
Property damage: 2.00K
Reported by: Trained Spotter

Around a dozen large trees were reported to have lost their top half. Two trees were reported down on power lines, resulting in power lines snapping.

Thunderstorm Wind in CHARLES, MARYLAND
From 23-JUN-15 19:03:00 to 23-JUN-15 19:03:00 (EST-5)
Location: MARBURY
Magnitude: 61.00 EG
Property damage: 2.00K
Reported by: Trained Spotter

Multiple power lines were reported down. Multiple tree tops were broken and carried a short distance away.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 23-JUN-15 18:31:00 to 23-JUN-15 18:31:00 (EST-5)
Location: LONDONTOWNE
Magnitude: 52.00 EG
Property damage: 2.00K
Reported by: Trained Spotter

Multiple trees down along MD Route 214.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 23-JUN-15 17:56:00 to 23-JUN-15 17:56:00 (EST-5)
Location: ARNOLD
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

A tree was reported down at the intersection of College Pkwy and Shore Acres Rd.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 23-JUN-15 17:42:00 to 23-JUN-15 17:42:00 (EST-5)
Location: BAYSIDE BEACH
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

A tree was reported down at the intersection of Harbor Rd and Dryer Rd.

Thunderstorm Wind in CHARLES, MARYLAND
From 23-JUN-15 19:02:00 to 23-JUN-15 19:02:00 (EST-5)
Location: RISON
Magnitude: 61.00 EG
Property damage: 3.00K
Reported by: State Official

Heavy tree damage across Smallwood State Park.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 23-JUN-15 19:39:00 to 23-JUN-15 19:39:00 (EST-5)
Location: OAKVILLE
Magnitude: 52.00 EG
Reported by: State Official

A tree was reported down near Oakville.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 23-JUN-15 19:43:00 to 23-JUN-15 19:43:00 (EST-5)
Location: HOLLYWOOD
Magnitude: 52.00 EG
Reported by: State Official

A tree was reported down near Hollywood.

Thunderstorm Wind in ST. MARY'S, MARYLAND
From 23-JUN-15 19:50:00 to 23-JUN-15 19:50:00 (EST-5)
Location: CALIFORNIA
Magnitude: 52.00 EG
Reported by: State Official

A tree was reported down near California.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 23-JUN-15 17:41:00 to 23-JUN-15 17:41:00 (EST-5)
Location: MARYLAND CITY
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: State Official

A tree was reported down at the intersection of Old Annapolis Rd and Route 198.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 23-JUN-15 17:40:00 to 23-JUN-15 17:40:00 (EST-5)
Location: MARYLAND CITY
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: State Official

A tree was reported down near the intersection of Brock Bridge Rd and Route 198.

Thunderstorm Wind in CALVERT, MARYLAND
From 23-JUN-15 19:39:00 to 23-JUN-15 19:39:00 (EST-5)
Location: STOAKLEY
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: State Official

Multiple trees were reported down across the Prince Frederick area.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 23-JUN-15 17:48:00 to 23-JUN-15 17:48:00 (EST-5)
Location: RUTLAND
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: State Official

A tree was reported down near the intersection of Rossback Rd and Patuxent River Rd.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 23-JUN-15 18:02:00 to 23-JUN-15 18:02:00 (EST-5)
Location: ANNAPOLIS
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

A tree was reported down at the intersection of Ferry Point Rd and Harness Creek Rd.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 23-JUN-15 17:54:00 to 23-JUN-15 17:54:00 (EST-5)
Location: REVELL
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

Multiple trees were reported down at the intersection of Broadwater Ave and Mago Vista Ave.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 23-JUN-15 17:57:00 to 23-JUN-15 17:57:00 (EST-5)
Location: LUSBY XRDS
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

Multiple trees were reported down at the intersection of Chesterfield Rd and Hawkins Rd.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 23-JUN-15 17:57:00 to 23-JUN-15 17:57:00 (EST-5)
Location: ST MARGARETS
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

A tree was reported down at the intersection of College Pkwy and Bellerive Rd.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 23-JUN-15 18:11:00 to 23-JUN-15 18:11:00 (EST-5)
Location: DAVIDSONVILLE
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

A tree was reported down at the intersection of Cottage Run and Birdsville Rd.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 23-JUN-15 18:18:00 to 23-JUN-15 18:18:00 (EST-5)
Location: TRACYS LNDG
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

A tree was reported down at the intersection of Route 2 and Route 258.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 23-JUN-15 18:15:00 to 23-JUN-15 18:15:00 (EST-5)
Location: HARWOOD
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

A tree was reported down at the intersection of Route 2 and Owensville Sudley Rd.

Thunderstorm Wind in HARFORD, MARYLAND
From 23-JUN-15 16:12:00 to 23-JUN-15 16:12:00 (EST-5)
Location: PYLESVILLE
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

A tree was reported down near 2902 Whiteford Rd.

Thunderstorm Wind in FREDERICK, MARYLAND
From 23-JUN-15 16:28:00 to 23-JUN-15 16:28:00 (EST-5)
Location: PARK MILLS
Magnitude: 52.00 EG
Property damage: 2.00K
Reported by: 911 Call Center

A tree was reported down and a power pole was snapped in half near the 8400 block of Peters Rd.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 23-JUN-15 18:20:00 to 23-JUN-15 18:20:00 (EST-5)
Location: FAIR HAVEN
Magnitude: 51.00 MG
Reported by: Mesonet

Reported at Herring Bay.

Thunderstorm Wind in ANNE ARUNDEL, MARYLAND
From 23-JUN-15 17:52:00 to 23-JUN-15 17:52:00 (EST-5)
Location: SEVERNA PARK
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: 911 Call Center

A tree was reported down at the intersection of Riggs Ave and Avondale Circle.

Thunderstorm Wind in HOWARD, MARYLAND
From 23-JUN-15 17:11:00 to 23-JUN-15 17:11:00 (EST-5)
Location: DAYTON
Magnitude: 52.00 EG
Reported by: Social Media

A small tree and multiple large branches were snapped.