Pennsylvania, 2000

Flash Flooding in Pennsylvania, August 6, 2000

August 6, 2000 · NWS PBZ · 5 events in 5 counties and zones

0 inches in less than 2 hours, creating widespread flash flooding problems.

Where it happened

Every event with a place to put it; 5 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
0
Property damage
$25,000
Crop damage
None recorded
Events
5

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 PBZ wrote it up.

Thunderstorms training across southwest Pennsylvania produced rainfall amounts of between 1.5 and 2.0 inches in less than 2 hours, creating widespread flash flooding problems.

The radar

The Pittsburgh radar (KPBZ), 21 km away, was scanning. The volume nearest the first event began at 12:32 UTC.

Open the radar archive at this moment

Event by event

5 flash flood. Local standard time, as filed.

Flash Flood, Allegheny

When
August 6, 7:35 AM EST to 9:30 AM EST
Where
Allegheny County, 2 mi SE of Dormont
Reported by
LAW ENFORCEMENT
Coordinates
40.469, -79.981 (the zone’s center; the record gives no point)

Roadway flooding was reported on Saw Mill Run Boulevard in the South Hills.

Flash Flood, Washington

When
August 6, 7:50 AM EST to 9:30 AM EST
Where
Washington County, 1 mi S of Washington
Reported by
LAW ENFORCEMENT
Coordinates
40.189, -80.248 (the zone’s center; the record gives no point)

Roadway flooding was reported on State Route 40 in the southern suburbs of Washington.

Flash Flood, Westmoreland

When
August 6, 8:10 AM EST to 10:00 AM EST
Where
Westmoreland County, Countywide
Property damage
$20,000
Reported by
LAW ENFORCEMENT
Coordinates
40.311, -79.467 (the zone’s center; the record gives no point)

Street and basement flooding was reported in the Irwin area. In Scottdale, some smaller tributaries of Jacobs Creek were flooding onto State Route 819.

Flash Flood, Fayette

When
August 6, 8:30 AM EST to 10:00 AM EST
Where
Fayette County, Countywide
Property damage
$5,000
Reported by
LAW ENFORCEMENT
Coordinates
39.920, -79.647 (the zone’s center; the record gives no point)

Street flooding was reported in Elliottsville. In Republic, State Route 166 was flooded. Flooding was reported just north of Champion along the tributaries of Indian Creek. Minor flooding was reported in Everson, near Jacobs Creek. State Route 819 in Dawson was flooded. Minor stream flooding was reported in the Indian Head area.

Flash Flood, Greene

When
August 6, 8:45 AM EST to 10:00 AM EST
Where
Greene County, Poland Mines
Reported by
LAW ENFORCEMENT
Coordinates
39.854, -80.223 (the zone’s center; the record gives no point)

Minor flooding was reported on State Route 88.

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 2000Every state in 2000This day in weather historyWarnings in Pennsylvania, August 2000

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: 5174756, 5174801, 5174804, 5174802, 5174803.