Thunderstorm Wind, Delaware
- When
- May 24, 2:30 PM EST to 2:50 PM EST
- Where
- Delaware County, Countywide
- Measured
- 50 kt (58 mph)
- Reported by
- NEWSPAPER
- Coordinates
- 39.930, -75.430
Damaging Wind in Pennsylvania, May 24, 1999
A severe thunderstorm knocked down trees and power lines across Delaware County. Downed trees closed one road in Upper Darby.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
What happened
The episode as NWS PHI wrote it up.
A severe thunderstorm knocked down trees and power lines across Delaware County. Downed trees closed one road in Upper Darby. About 30,000 homes and businesses lost power that afternoon. Throughout PECO Energy's service area 82,000 homes and businesses lost power, half of the outages were caused by direct lightning hits and about 20 percent of the outages were caused by the wind. Most of the Delaware County outages were wind related. There were still 27,500 homes and businesses without power throughout the region at 9 p.m. EDT that evening. Most power was restored the next day.
The radar
The national radar mosaic for the moment the first event began.
Event by event
1 thunderstorm wind. Local standard time, as filed.
What these are
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Hail and Damaging Winds in New Mexico, May 24, 1999
- Damaging Winds in Pennsylvania, May 24, 1999
- Damaging Winds in Maryland, May 24, 1999
- Hail and Lightning Strikes in Colorado, May 24, 1999
- Damaging Wind in Texas, May 24, 1999
- Hail and Damaging Winds in Virginia, May 24, 1999
- Lightning Strike in Maryland, May 24, 1999
- Damaging Wind in New Mexico, May 24, 1999
- Damaging Winds in Pennsylvania, May 24, 1999
- Hail and Damaging Wind in Maryland, May 24, 1999
- Flash Flood and Hail in Texas, May 24, 1999
- Damaging Wind in Pennsylvania, May 24, 1999
More
Every storm in Pennsylvania in 1999Every state in 1999This day in weather historyWarnings in Pennsylvania, May 1999
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5699615.