Flash Flood in South Dakota, July 7, 2015

Name: Flash Flood in South Dakota, July 7, 2015
Start: 2015-07-07T19:30
End: 2015-07-07T21:30
Location: South Dakota

July 7, 2015 · NWS UNR · 1 event in 1 county or zone

Slow-moving thunderstorms produced four to six inches of rain within a few hours during the evening, with flash flooding resulting in the Lodgepole Creek basin.

Where it happened

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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 UNR wrote it up.

Slow-moving thunderstorms produced four to six inches of rain within a few hours during the evening, with flash flooding resulting in the Lodgepole Creek basin.

The radar

The Bismarck radar (KBIS), 176 km away, was scanning. The volume nearest the first event began at 02:28 UTC.

Open the radar archive at this moment

Event by event

1 flash flood. Local standard time, as filed.

Flash Flood, Perkins

When: July 7, 7:30 PM MST to 9:30 PM MST
Where: Perkins County, 7.06 mi ESE of Lodgepole to 11.27 mi ESE of Lodgepole
Cause: Heavy Rain
Reported by: Public
Coordinates: 45.770, -102.530

Runoff from heavy rain flooded roads, yards, and pastures and caused stock dams to overflow. Haynes Road and 113th Street were inundated with water for a couple of hours. Rainfall amounts included 5.9 inches ten miles east-southeast of Lodgepole and 4.75 inches eight miles east-southeast of Lodgepole.

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

Every storm in South Dakota in 2015 Every state in 2015 This day in weather history Warnings in South Dakota, July 2015

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 2026-09-30. Each event’s entry at NCEI: 592335.