On the morning of May 30th a surface front was positioned across Pennsylvania, with a surface low positioned west of Chicago, Illinois. Through the day the surface
low moved eastward along the frontal boundary, reaching western Pennsylvania by late in the afternoon. The low then quickly pushed eastward off the NJ coastline by late in the evening, with a cold front crossing the region. In addition, two disturbances aloft moved across the area, one during the mid to late afternoon hours, and another in the evening. Out ahead of the front, warmth and humidity allowed for the development of moderate instability and that coupled with moderate wind shear aloft set the stage for two rounds of scattered showers and thunderstorms, some of which became severe. Two tornadoes occurred across central Maryland.

Tornado in FREDERICK, MARYLAND
From 30-MAY-19 13:48:00 to 30-MAY-19 13:59:00 (EST-5)
Location: REELS MILL
Tornado F-scale: EF0
Property damage: 22.00K
Reported by: NWS Storm Survey

An EF-0 tornado, with estimated maximum wind speeds of 85 mph, occurred on Thursday May 30th, 2019 near Frederick, Maryland. The 6.5 mile path of damage extended from the eastern suburbs of Frederick, through Ijamsville, to Monrovia. The tornado touched down near the Monocacy River at approximately 2:48 PM EDT (1:48 PM EST), just west of the Frederick County Public Safety Training Facility. As it moved east over the county training facility and property, it snapped and uprooted many trees, but no structural damage was reported to the building from the wind. The tornado tracked a little south of due east, uprooting and snapping trees along Reichs Ford Road. As it crossed into Ijamsville, trees were uprooted and large branches were snapped along Ijamsville Road and Mussetter Road near the Methodist church. Continuing east, trees were noted uprooted and large branches snapped in multiple directions along a path that crossed Prices Distillery Road, Whiskey Road just south of Whiskey Creek Golf Course, a new residential community along Ed McClain Road, and
Green Valley Road before lifting at approximately 2:59 PM EDT (1:59 PM EST). Damage estimates were provided by the Frederick County Division of Emergency Management.

Hail in HOWARD, MARYLAND
From 30-MAY-19 14:17:00 to 30-MAY-19 14:17:00 (EST-5)
Location: LISBON
Magnitude: 1.00 
Reported by: Trained Spotter

Quarter-sized hail (1.0 inch in diameter) was reported.

Tornado in HOWARD, MARYLAND
From 30-MAY-19 14:20:00 to 30-MAY-19 14:27:00 (EST-5)
Location: KNOLLWOOD
Tornado F-scale: EF1
Reported by: NWS Storm Survey

An EF-1 tornado, with estimated maximum wind speeds around 100 mph, occurred Thursday May 30th 2019 near Glenelg, Maryland. At 3:20 PM EDT (2:20 PM EST), the tornado touched down in a residential community west of Glenelg between Meriweather Drive and Edgewoods Way. As the tornado was passing through the community, it ripped sections of roofing deck off homes. It also snapped and uprooted trees and
large branches, and lofted loose objects hundreds of feet. Moving east-southeast, it crossed over Tridelphia Road and other nearby roads, downing large trees and power lines. As it reached Maryland Route 32 it downed a swath of trees on both sides of the road before moving over and just north of a Howard County Highway Maintenance facility. At the facility, the tornado ripped off its tin roofing, damaged some roof framing, tore a large section of fabric from a salt dome, destroyed garage bay
doors, damaged fencing, and continued to snap and uproot large trees along its path.
Continuing along, it snapped and uprooted large trees in residential areas along Buckskin Lake Drive, Folly Quarter Lane, and Heritage Hill Lane. It also ripped off a section of barn roofing. The tornado lifted at 3:27 PM EDT (2:27 PM EST), over a farm property before it reached Sheppard Lane.

Thunderstorm Wind in FREDERICK, MARYLAND
From 30-MAY-19 13:51:00 to 30-MAY-19 13:51:00 (EST-5)
Location: REELS MILL
Magnitude: 50.00 EG
Reported by: State Official

A tree was blown down on the 4600 block of Araby Church Road.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 30-MAY-19 14:06:00 to 30-MAY-19 14:06:00 (EST-5)
Location: DAMASCUS
Magnitude: 61.00 EG
Reported by: Emergency Manager

Several reports of trees and wires blown down in Damascus.

Thunderstorm Wind in MONTGOMERY, MARYLAND
From 30-MAY-19 14:06:00 to 30-MAY-19 14:06:00 (EST-5)
Location: CLAGGETTSVILLE
Magnitude: 50.00 EG
Reported by: Emergency Manager

A tree was blown down on the 29010 block of Ridge Road. Another tree was blown down on the 28600 block of Kemptown Road.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 30-MAY-19 14:48:00 to 30-MAY-19 14:48:00 (EST-5)
Location: SPARROWS PT
Magnitude: 61.00 EG
Reported by: Public

A free standing traffic light was blown down at the intersection of Martin Luther King Boulevard and Pennsylvania Avenue. Several trees were also reported blown down in the area.

Thunderstorm Wind in PRINCE GEORGE'S, MARYLAND
From 30-MAY-19 14:51:00 to 30-MAY-19 14:51:00 (EST-5)
Location: DISTRICT HGTS
Magnitude: 50.00 EG
Reported by: Emergency Manager

A tree was blown down on a house in the 3200 block of Maygreen Avenue.

Thunderstorm Wind in BALTIMORE, MARYLAND
From 30-MAY-19 14:53:00 to 30-MAY-19 14:53:00 (EST-5)
Location: SPARROWS PT
Magnitude: 61.00 EG
Reported by: State Official

Telephone poles were blown down on Key Highway near McComas Street.

Thunderstorm Wind in HOWARD, MARYLAND
From 30-MAY-19 14:20:00 to 30-MAY-19 14:20:00 (EST-5)
Location: DAYTON
Magnitude: 58.00 MG
Reported by: Mesonet

A wind gust of 58 knots (67 mph) was measured near Dayton.

Thunderstorm Wind in FREDERICK, MARYLAND
From 30-MAY-19 13:54:00 to 30-MAY-19 13:54:00 (EST-5)
Location: IJAMSVILLE
Magnitude: 62.00 MG
Reported by: Mesonet

A wind gust of 62 knots (71 mph) was measured near New Market.