Iowa, 1999

Flash Flooding in Iowa, May 16 to 17, 1999

May 16 to 17, 1999 · NWS ARX · 2 events in 2 counties and zones

Rainfall amounts of 4 to 8 inches caused major flash flooding. Hardest hit were areas along the Turkey and Volga River where many roads and bridges were washed out.

Where it happened

Every event with a place to put it; 2 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
$3.5 million
Crop damage
None recorded
Events
2

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 ARX wrote it up.

Rainfall amounts of 4 to 8 inches caused major flash flooding. Hardest hit were areas along the Turkey and Volga River where many roads and bridges were washed out. A cooperative weather observer in Fayette (Fayette County) had their reporting equipment washed away, while a 4 foot deep mudslide was reported by the Clayton County sheriff near Volga. The towns of Volga and Garber (Clayton County) had to be evacuated with many residents being rescued by boat.

The radar

The La Crosse radar (KARX), 119 km away, was scanning. The volume nearest the first event began at 22:42 UTC.

Open the radar archive at this moment

Event by event

2 flash flood. Local standard time, as filed.

Flash Flood, Fayette

When
May 16, 4:45 PM CST to May 17, 12:00 AM CST
Where
Fayette County, Countywide
Property damage
$2.0 million
Reported by
LAW ENFORCEMENT
Coordinates
42.863, -91.844 (the zone’s center; the record gives no point)

Flash Flood, Clayton

When
May 16, 5:00 PM CST to May 17, 12:00 AM CST
Where
Clayton County, Countywide
Property damage
$1.5 million
Reported by
LAW ENFORCEMENT
Coordinates
42.845, -91.341 (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 Iowa in 1999Every state in 1999This day in weather historyWarnings in Iowa, 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: 5696207, 5696208.