331
Recorded events
1
Direct deaths
14
Direct injuries
$7.7M
Property damage
Thunderstorm Wind in Delaware County, Pennsylvania: 331 recorded events between 1957 and 2026. The strongest on record measured 91. That places the county #352 nationally and #29 statewide for this hazard.
Decade by decade
Thunderstorm Wind in Delaware County, Pennsylvania: events per decade
Reporting practice changed over time — early decades are undercounted, not calmer.
The busiest decade for thunderstorm wind in Delaware County is the 2020s, when 124 of the county's 331 recorded events were logged. Comparing decades is useful for spotting active periods, but the earliest years are thin because systematic reporting for this hazard began later.
Within the Delaware County archive, thunderstorm wind makes up 49.3% of all recorded severe weather across 9 hazard types. Nationally the county sits at #352 for this hazard and #29 within Pennsylvania, putting it in the 88.7 percentile of all U.S. counties.
Seasonality
Events by month
Jun is the peak month for thunderstorm wind in Delaware County with 88 recorded events, while Dec is the quietest. Seasonality here is a property of the archive as much as the climate: reports cluster where population and spotter networks are densest.
Significant events
Deadliest on record
| Date | Location | Scale | Deaths | Injuries | Damage |
|---|---|---|---|---|---|
| Oct 15, 2003 | HAVERFORD | 56 | 1 | 1 | $0 |
| May 16, 2004 | YEADON | 40 | 0 | 8 | $0 |
| Jun 24, 2010 | FLORIDA PARK | 66 | 0 | 2 | $1.0M |
| Nov 1, 2019 | ITHAN | 60 | 0 | 1 | $0 |
| Sep 23, 2003 | THORNTON | 61 | 0 | 1 | $1.0M |
| Jun 16, 1991 | 0 | 0 | 1 | $0 |
Most recent
Latest recorded events
| Date | Location | Magnitude | Damage |
|---|---|---|---|
| Mar 16, 2026 | BRANDYWINE SUMMIT | 50 | $0 |
| Jul 25, 2025 | SPRINGFIELD | 50 | $0 |
| Jun 19, 2025 | NEWTON SQUARE | 50 | $0 |
| Jun 19, 2025 | HAVERTOWN | 50 | $0 |
| Jun 19, 2025 | MEDIA | 50 | $0 |
| Jun 19, 2025 | SANDY BANK | 50 | $0 |
| Jun 19, 2025 | DARLING | 50 | $0 |
| Jun 19, 2025 | CHESTER HGTS | 50 | $0 |
| Jun 19, 2025 | MARKHAM | 50 | $0 |
| Jun 19, 2025 | THORNTON | 50 | $0 |
Other hazards here
More from Delaware County
- Flash Flood 144
- Hail 62
- Flood 49
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
Chester City was also hard hit by the powerful macroburst associated with the line of severe thunderstorms. About twenty homes and buildings were condemned because of wind damage including fallen trees. Buildings along the Avenue Of The States as well as trees within city parks were particularly hard hit. A tractor-trailer along Interstate 95 was overturned by the severe thunderstorm. the driver was not injured. Wind damage in the city was estimated at 2.5 million dollars.
An extremely powerful macroburst associated with a severe thunderstorm cut a swath of wind damage across the eastern side of Aston Township to the east of Concord Road. Peak wind gusts were estimated to reach 85 mph. Shingles and siding was ripped from homes as well as numerous homes that were struck by fallen trees. About fifteen homes were condemned in the township. Wind damage from the macroburst continued southeast through Chester City.
A line of severe showers and thunderstorms caused wind damage especially across the eastern half of the county. In Collingdale, a piece of a roof blew off a home and landed on and damaged another home. Downed trees damaged a few other roofs throughout the county. Downed trees damaged vehicles in Media and Springfield.
Quick answers
Frequently asked
How many thunderstorm wind events are on record in Delaware County, Pennsylvania?
331 thunderstorm wind events are recorded in Delaware County between 1957 and 2026, causing 1 direct deaths.
What is the strongest thunderstorm wind recorded in Delaware County?
The strongest thunderstorm wind on record in Delaware County measured 91.
Where does the thunderstorm wind data for Delaware County come from?
All events come from the NOAA/NCEI Storm Events Database, the federal public-domain archive of severe weather reports. Dates are UTC, damage is as reported and not inflation-adjusted, and the most recent entries may still be revised.
Cite this page
“Thunderstorm Wind in Delaware County, Pennsylvania.” Severe Weather History. severeweatherhistory.com/county/pennsylvania/delaware-county/thunderstorm-wind/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.