A remnant mesoscale convective vortex (MCV) moved through the mid-Atlantic on the afternoon of May 20. This feature formed in association with a strong convective complex over the southern Plains on May 18, and proceeded to track northeast across the eastern half of the US, producing multiple additional rounds of severe weather as it did so. This included over the mid-Atlantic on May 20. As the MCV moved into the region, a warm and moderately unstable air mass was present over the region. Shear and forcing associated with the MCV caused multiple rounds of thunderstorms to develop during the afternoon. Some storms became severe, with a mixed convective mode leading to instances of damaging winds, hail, and one brief tornado in New Jersey. As the MCV moved offshore, convection diminished during the evening hours.

Hail in DELAWARE, PENNSYLVANIA
From 20-MAY-22 13:55:00 to 20-MAY-22 13:55:00 (EST-5)
Location: CRUM LYNNE STATION
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BERKS, PENNSYLVANIA
From 20-MAY-22 13:57:00 to 20-MAY-22 13:57:00 (EST-5)
Location: ALSACE MANOR
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail was reported as slightly less than golf ball size. Wind damage was also reported in the area. Time estimated from radar.

Hail in DELAWARE, PENNSYLVANIA
From 20-MAY-22 13:57:00 to 20-MAY-22 13:57:00 (EST-5)
Location: VILLAGE GREEN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DELAWARE, PENNSYLVANIA
From 20-MAY-22 14:00:00 to 20-MAY-22 14:00:00 (EST-5)
Location: MORTON
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DELAWARE, PENNSYLVANIA
From 20-MAY-22 14:00:00 to 20-MAY-22 14:00:00 (EST-5)
Location: ARLINGTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DELAWARE, PENNSYLVANIA
From 20-MAY-22 14:01:00 to 20-MAY-22 14:01:00 (EST-5)
Location: BRIARCLIFF
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DELAWARE, PENNSYLVANIA
From 20-MAY-22 14:02:00 to 20-MAY-22 14:02:00 (EST-5)
Location: PRIMOS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DELAWARE, PENNSYLVANIA
From 20-MAY-22 14:04:00 to 20-MAY-22 14:04:00 (EST-5)
Location: BRIARCLIFF
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

An mPing report.

Hail in PHILADELPHIA, PENNSYLVANIA
From 20-MAY-22 14:10:00 to 20-MAY-22 14:10:00 (EST-5)
Location: PHILADELPHIA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

An mPing report.

Hail in PHILADELPHIA, PENNSYLVANIA
From 20-MAY-22 14:15:00 to 20-MAY-22 14:15:00 (EST-5)
Location: WEST PHILADELPHIA
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in PHILADELPHIA, PENNSYLVANIA
From 20-MAY-22 14:15:00 to 20-MAY-22 14:15:00 (EST-5)
Location: WEST PHILADELPHIA
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail up to half dollar size fell in South Philadelphia. Time estimated from radar.

Hail in PHILADELPHIA, PENNSYLVANIA
From 20-MAY-22 14:16:00 to 20-MAY-22 14:16:00 (EST-5)
Location: PHILADELPHIA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail around one inch in diameter near Dickinson Square in South Philadelphia.

Hail in PHILADELPHIA, PENNSYLVANIA
From 20-MAY-22 14:20:00 to 20-MAY-22 14:20:00 (EST-5)
Location: PHILADELPHIA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DELAWARE, PENNSYLVANIA
From 20-MAY-22 14:53:00 to 20-MAY-22 14:53:00 (EST-5)
Location: WOODLYN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 20-MAY-22 14:00:00 to 20-MAY-22 14:00:00 (EST-5)
Location: SUNNEYTOWN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A large tree limbs estimated at over 8 inches in diameter took down power lines along the southbound side of Allentown Rd near Green Hill Rd and Rising Sun Rd. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 20-MAY-22 14:03:00 to 20-MAY-22 14:03:00 (EST-5)
Location: OLEY
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A damage report from near Oley via social media showed numerous trees down. Radar data indicates a strong downburst likely occurred in the area. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 20-MAY-22 13:57:00 to 20-MAY-22 13:57:00 (EST-5)
Location: ALSACE MANOR
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Trees were downed on Link Rd in Fleetwood from a possible microburst. Ping pong ball size hail was also reported in the area. Time estimated from radar.

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 20-MAY-22 14:58:00 to 20-MAY-22 14:58:00 (EST-5)
Location: CHESTNUT HILL
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Social media photo showing a tree down into wires on Bells Mills Rd, blocking the road. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 20-MAY-22 13:00:00 to 20-MAY-22 13:00:00 (EST-5)
Location: SEYFERT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Severe large tree branches were downed. Time estimated from radar.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 20-MAY-22 15:18:00 to 20-MAY-22 15:18:00 (EST-5)
Location: FURLONG
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A couple of trees reported down.

Hail in BERKS, PENNSYLVANIA
From 20-MAY-22 13:06:00 to 20-MAY-22 13:06:00 (EST-5)
Location: SEYFERT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter size hail fell, and also knocked down small branches and leaves from trees. Time estimated from radar.

Hail in BERKS, PENNSYLVANIA
From 20-MAY-22 13:33:00 to 20-MAY-22 13:33:00 (EST-5)
Location: BOYERTOWN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DELAWARE, PENNSYLVANIA
From 20-MAY-22 13:50:00 to 20-MAY-22 13:50:00 (EST-5)
Location: VILLAGE GREEN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

An mPing report.

Hail in DELAWARE, PENNSYLVANIA
From 20-MAY-22 13:54:00 to 20-MAY-22 13:54:00 (EST-5)
Location: RUTLEDGE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public