Tuesday August 1st Severe Storms

Overview

Severe storms developed late Tuesday afternoon along a boundary just south of the Interstate 90 corridor in southeast South Dakota. Large hail, dangerous lightning, and heavy rain accompanied these storms as they drifted southeast into northwest Iowa.

These storms developed in part to a very warm and unstable environment developing across the region, with dew point values again near the 70 degree mark. With little air above the ground to make the storms move, localized downburst winds were created, leading to very localized high winds.

Rainfall was also plentiful where storms tracked. Portions of the Sioux Falls area received upwards of an inch of rain in a short amount of time.

Radar Loop of the Event

Storm Reports & Photos
Radar

Storm Reports

Report Time	County	Location	ST	Event Type	Mag.	Source	Remark
Tue Aug 01 2017 19:03:00 GMT-0500 (Central Daylight Time)	Brule	18 S Pukwana	SD	TSTM WND GST	60	trained spotter
Tue Aug 01 2017 20:40:00 GMT-0500 (Central Daylight Time)	Hutchinson	1 E Tripp	SD	TSTM WND GST	60	public	also 12 inch in diameter tree pushed over.
Tue Aug 01 2017 20:57:00 GMT-0500 (Central Daylight Time)	Minnehaha	3 SSE Sioux Falls	SD	HAIL	0.25	trained spotter
Tue Aug 01 2017 21:04:00 GMT-0500 (Central Daylight Time)	Lincoln	4 S Sioux Falls	SD	HAIL	1.25	public	report via social media.
Tue Aug 01 2017 21:05:00 GMT-0500 (Central Daylight Time)	Lincoln	4 SSE Sioux Falls	SD	HAIL	1	nws employee
Tue Aug 01 2017 21:07:00 GMT-0500 (Central Daylight Time)	Lincoln	Harrisburg	SD	HAIL	0.88	public
Tue Aug 01 2017 21:10:00 GMT-0500 (Central Daylight Time)	Lincoln	Harrisburg	SD	HAIL	1	public	report via social media.
Tue Aug 01 2017 21:25:00 GMT-0500 (Central Daylight Time)	Minnehaha	3 S Valley Springs	SD	HAIL	1	public	report via social media.
Tue Aug 01 2017 21:25:00 GMT-0500 (Central Daylight Time)	Minnehaha	3 S Valley Springs	SD	HAIL	1	public	report via social media
Tue Aug 01 2017 21:42:00 GMT-0500 (Central Daylight Time)	Nobles	Bigelow	MN	HAIL	0.75	trained spotter
Tue Aug 01 2017 21:48:00 GMT-0500 (Central Daylight Time)	Osceola	6 NNE Sibley	IA	HAIL	1.5	public	report via social media.
Tue Aug 01 2017 22:01:00 GMT-0500 (Central Daylight Time)	Osceola	3 NE Sibley	IA	HAIL	0.75	public
Tue Aug 01 2017 22:26:00 GMT-0500 (Central Daylight Time)	Osceola	1 NE Sibley	IA	HAIL	1	trained spotter
Tue Aug 01 2017 23:08:00 GMT-0500 (Central Daylight Time)	Dickinson	2 W Superior	IA	HAIL	1.5	emergency mngr
Tue Aug 01 2017 23:18:00 GMT-0500 (Central Daylight Time)	Dickinson	3 S Superior	IA	HAIL	1	trained spotter	hail covered the ground

Hail

The largest hail across the area was reported near Sioux Falls and in portions of Northwest Iowa. 1.5" Hail shredded trees and dented vehicles.


Photo by Marc Janssen	Photo by Marc Janssen	Hail In Trampoline	Sioux Falls Hail Near 69th Street

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Radar Loop	Loops of Storms near Sioux Falls	How Quickly Storms Grow Near Sioux Falls