Iowa, 2000

Flash Flooding and Hail in Iowa, July 26, 2000

July 26, 2000 · NWS DVN · 8 events in 3 counties and zones

Summary of 7/26/00 event:Boundaries from a decaying Mesoscale Convective System, interacting with a moderately unstable airmass, provided the focus for the development of strong to severe thunderstorms, which began in portions of central and northeast Iowa during the morning hours. Scattered severe activity with large hail reports continued through the afternoon into the evening hours across…

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
None recorded
Crop damage
None recorded
Events
8

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 DVN wrote it up.

Summary of 7/26/00 event:Boundaries from a decaying Mesoscale Convective System, interacting with a moderately unstable airmass, provided the focus for the development of strong to severe thunderstorms, which began in portions of central and northeast Iowa during the morning hours. Scattered severe activity with large hail reports continued through the afternoon into the evening hours across eastern Iowa. Torrential rains of three to four inches produced some flash flooding along some state highways in the area. See individual entries above for additional details on the 7/26/00 event.

The radar

The Quad Cities radar (KDVN), 128 km away, was scanning. The volume nearest the first event began at 17:38 UTC.

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Event by event

3 hail, 3 flash flood, 2 heavy rain. Local standard time, as filed.

Hail, Linn

When
July 26, 11:38 AM CST
Where
Linn County, Walker
Measured
0.88 in hail
Reported by
LAW ENFORCEMENT
Coordinates
42.283, -91.833

Nickel-sized hail reported by law enforcement.

Hail, Benton

When
July 26, 1:00 PM CST
Where
Benton County, 3 mi S of Newhall
Measured
1.75 in hail
Reported by
TRAINED SPOTTER
Coordinates
41.933, -91.983

Golfball-sized hail reported by trained spotter.

Flash Flood, Benton

When
July 26, 5:10 PM CST
Where
Benton County, Keystone
Reported by
EMERGENCY MANAGER
Coordinates
42.080, -92.066 (the zone’s center; the record gives no point)

Heavy rains produced flash flooding. A gravel road near Keystone was flooded. Rain filled roadside ditches and fields had standing/running water. Emergency management reported 3.8 inches of rain in Keystone.

Flash Flood, Benton

When
July 26, 5:40 PM CST
Where
Benton County, 4 mi N of Luzerne
Reported by
EMERGENCY MANAGER
Coordinates
42.080, -92.066 (the zone’s center; the record gives no point)

Torrential rains resulted in water over Highway 30.

Heavy Rain, Benton

When
July 26, 5:40 PM CST
Where
Benton County, Luzerne
Reported by
EMERGENCY MANAGER
Coordinates
42.080, -92.066 (the zone’s center; the record gives no point)

Emergency management reported 4.5 inches of rain.

Flash Flood, Iowa

When
July 26, 5:52 PM CST
Where
Iowa County, Amana
Reported by
EMERGENCY MANAGER
Coordinates
41.686, -92.065 (the zone’s center; the record gives no point)

Two inches of water covered a portion of Highway 151.

Heavy Rain, Benton

When
July 26, 5:52 PM CST
Where
Benton County, 4 mi SE of Newhall
Reported by
EMERGENCY MANAGER
Coordinates
42.080, -92.066 (the zone’s center; the record gives no point)

Emergency management reported 3.5 inches of rain.

Hail, Iowa

When
July 26, 6:15 PM CST
Where
Iowa County, Williamsburg
Measured
0.75 in hail
Reported by
OTHER FEDERAL AGENCY
Coordinates
41.667, -92.000

Penny-sized hail reported by NWS Cooperative Observer.

What these are

Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
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.
Heavy Rain
Rainfall totals unusual for the place and season that did not produce a flood.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Iowa in 2000Every state in 2000This day in weather historyWarnings in Iowa, July 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: 5155429, 5155430, 5155645, 5155646, 5155647, 5155648, 5155649, 5155650.