Pennsylvania, 1999

Damaging Wind in Pennsylvania, August 14, 1999

August 14, 1999 · NWS PHI · 1 event in 1 county or zone

A severe thunderstorm knocked down numerous trees and power lines in the lower part of Bucks County from Warrington Township southeast to the Delaware River. Wind damage was reported in Bensalem, Bristol, Lower Makefield, Middletown and Warrington Townships.

Where it happened

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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 numerous trees and power lines in the lower part of Bucks County from Warrington Township southeast to the Delaware River. Wind damage was reported in Bensalem, Bristol, Lower Makefield, Middletown and Warrington Townships. The worst damage occurred in the Warrington Village Development in Warrington Township. Numerous trees were uprooted and two homes were severely damaged after trees fell through their roofs. Another home's patio and family room was damaged and at least one car was destroyed. PECO Energy reported about 47,000 homes and businesses lost power in Southeast Pennsylvania, about 5,000 of the outages occurred in Bucks County. About a quarter of the outages were attributed to the wind. There were about 1,600 cloud-to-ground lightning strikes as the thunderstorms moved through Southeast Pennsylvania during the afternoon of the 14th. The storms overnight produced about 5,000 cloud-to-ground strikes.

The radar

The Philadelphia radar (KDIX), 70 km away, was scanning. The volume nearest the first event began at 21:26 UTC.

Open the radar archive at this moment

Event by event

1 thunderstorm wind. Local standard time, as filed.

Thunderstorm Wind, Bucks

When
August 14, 4:25 PM EST to 4:50 PM EST
Where
Bucks County, Warrington to Levittown
Measured
52 kt (60 mph)
Reported by
BROADCAST MEDIA
Coordinates
40.250, -75.130

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

More

Every storm in Pennsylvania in 1999Every state in 1999This day in weather historyWarnings in Pennsylvania, August 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: 5717990.