Pennsylvania, 1999

Flash Flood in Pennsylvania, August 20, 1999

August 20, 1999 · NWS CTP · 1 event in 1 county or zone

1 flash flood, as filed by the National Weather Service.

Where it happened

Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. 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

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The toll

Deaths
0
Injuries
1
Property damage
$25 million
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.

The radar

The national radar mosaic for the moment the first event began.

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Event by event

1 flash flood. Local standard time, as filed.

Flash Flood, McKean

When
August 20, 2:00 PM EST to 9:00 PM EST
Where
McKean County, Bradford
Injuries
1 direct, 0 indirect
Property damage
$25 million
Reported by
EMERGENCY MANAGER
Coordinates
41.808, -78.569 (the zone’s center; the record gives no point)

Between 8 and 9 inches of rain fell in a localized area around Bradford in little more than 12 hours. Rain overnight on the 19th dropped about 3.5 inches in the Bradford area up to sunrise. Thunderstorms developed in the early afternoon and continued to move repeatedly across the city. Before the rain ended, an additional 5-1/2 inches of water fell, causing major flooding across the mountainous area that surrounds the community. Two businesses sustained major damage. KOA Speer, an electronics component manufacturer, lost some $8 million in damage to buildings and inventory. A grocery store in the downtown experienced a roof collapse and a stock of $500,000 was lost. Two hundred and eleven homes and 53 businesses sustained minor to major damage. Twenty-two structures had major damage and 8 were destroyed. At least 10 water rescues were made, but there were no fatalities. One person was injured as he helped an elderly female from the rapidly rising water.

What these are

Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

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: 5713878.