681
NOUS41 KPHI 120019
PNSPHI
DEZ001-NJZ015>019-PAZ070-071-101>106-121230-

Public Information Statement
National Weather Service Mount Holly NJ
819 PM EDT Sat Jul 11 2026

...NWS Damage Survey for the July 11, 2026 Thunderstorm Wind
Event...

.Southern Montgomery County, West Philadelphia, and South
Philadelphia Thunderstorm Wind Event...

Peak Wind Estimated:    60-70 mph
Path Length /statute/:  12 miles
Path Width /maximum/:   4-5 miles
Fatalities:             0
Injuries:               0

Start Date:             July 11, 2026
Start Time:             2:44 PM EDT
Start Location:         Lower Marion Township, Montgomery County, PA
Start Lat/Lon:          40.01/-75.28

End Date:               July 11, 2026
End Time:               3:15 PM EDT
End Location:           South Philadelphia, Philadelphia County, PA
End Lat/Lon:            39.90/-75.15

Summary: A series of at least 4 distinct microbursts with
estimated wind gusts of 60 to 70 mph impacted a narrow corridor
about 4 to 5 miles wide beginning in far southern Montgomery
County and continuing southeastward into West Philadelphia and
then South Philadelphia. Dozens of reports of widespread wind
damage to trees and buildings have been received and reviewed.
Based on radar data and dozens of photos and videos received from
across the area both during the storm and the aftermath, it has
been determined that all of the wind damage occurred from severe
microbursts causing straight line wind damage.

The first microburst occurred in Lower Merion Township in southern
Montgomery County beginning around 2:44 PM EDT, where widespread
tree damage has been reported. Power outages and disruptions to
SEPTA rail service also occurred in this area. A second
microburst occurred starting around 2:52 PM EDT in the northern
neighborhoods of West Philadelphia, and continuing southeastward.
In this area, there were numerous reports of uprooted trees,
including many having fallen onto vehicles and blocking countless
city streets. At least 2 reports of structural damage occurred in
West Philadelphia, including a partial building collapse and roof
blown off of a building resulting in evacuations of the occupants.

A third microburst occurred over the western neighborhoods of
South Philadelphia beginning around 3:01 PM EDT. South
Philadelphia experienced similar wind damage as West Philadelphia,
with numerous reports of uprooted trees and other tree damage
blocking city streets. There was at least 1 report of a roof blown
off a vacant building, which subsequently caused a partial brick
wall to collapse and crush a vehicle on the street below. A forth
microburst occurred over mainly industrial areas of South
Philadelphia beginning around 3:12 PM EDT, impacting areas such as
the Stadium District and Navy Yard. In this area, a few reports
of uprooted trees have been received.

The National Weather Service would like to thank our Emergency
Management partners and Skywarn Spotters for providing reports to
assist with this damage survey.

&&

NOTE:
The information in this statement is preliminary and subject to
change pending final review of the event and publication in NWS
Storm Data.

$$

Staarmann