Delaware, 1997

Flash Flood in Delaware, August 20, 1997

August 20, 1997 · NWS PHI · 1 event in 1 county or zone

Heavy rain fell across southern sections of the Maryland Eastern Shore and Central Delaware as thunderstorms continued to reform and move over the same locations. The rain became heavier as a developing low pressure system intensified over Delaware and Southern New Jersey.

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
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.

Heavy rain fell across southern sections of the Maryland Eastern Shore and Central Delaware as thunderstorms continued to reform and move over the same locations. The rain became heavier as a developing low pressure system intensified over Delaware and Southern New Jersey. Storm totals averaged between 3 and 9 inches in Kent County with the heaviest amounts toward Delaware Bay. In Dover, the storm total was 8.94 inches. In spite of the torrential downpours, the drought conditions that have occurred all summer helped the ground absorb much of the rain. The only reported flooding was along the Puncheon Run in Dover. The heavy rain also contributed to a fatal accident. At 745 p.m. EDT a 23-year-old male died when he lost control of his vehicle driving through a patch of standing water. The vehicle ran off the road and overturned. Rainfall amounts although heavy, were considerably less in the rest of Delaware. Storm totals included 2.51 inches in Newark and 2.31 inches at the New Castle County Airport and 1.4 inches in Salisbury Maryland.

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, Kent

When
August 20, 6:00 PM EST to 10:00 PM EST
Where
Kent County, Dover
Coordinates
39.096, -75.505 (the zone’s center; the record gives no point)

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 Delaware in 1997Every state in 1997This day in weather historyWarnings in Delaware, August 1997

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: 5621733.