June 17, 2106 Severe Weather Event

Overview

After a hot and humid day across the region, strong thunderstorms moved through during the late afternoon and evening hours. Damaging winds were the most reported weather hazard, with numerous reports of 60+ mph winds. The largest hail report was golf ball size hail near Madison, SD and Parker, SD. Temperatures also fell dramatically as the strong winds and rain moved through. In Sioux Falls, the temperature went from a steamy 90 degrees, down towards a chilly 67 degrees in less than 30 minutes.

In many areas there were two rounds of wind from this severe weather event. A strong outflow boundary (cool air rushing away from thunderstorms) would first push through a location bringing 40 to 60 mph winds. This boundary at times, was 30 or miles ahead of thunderstorms. A second round of wind would then accompany the thunderstorm activity as they moved through. The combination of these features led to a long and sustained period of 40 to even 70 mph winds.

Heavy rainfall was also common as thunderstorms moved through. Several flash flood warnings were issued with flooding reported in several areas, including the city of Brookings, SD. Localized rainfall totals greater than 2 to even 4 inches were reported.

Strong winds and tree damage lead to power outages in many areas. In portions of NW Iowa, including Sioux City, MidAmerican Energy reported that 12,600 customers were without power at one point following the passage of storms.

Radar Loop of Friday Evening Storms

Photos & Video
Radar
Storm Reports
Rainfall

Photos & Video:

Various Photos of Severe Weather Reports and Information


Satellite Image of Evening Storms SSEC/CIMMS	Tree Damage in Madison KJAM Radio	Hail in Brookings, SD (Jason Sik)	Moody County Tree Damage (Carl Brakke)


SiouxFalls Temperature and Wind Speed Trace With Time	Tree Damage in Madison Jacky Unzelman-Vasek	Lemars Wind Damage (David Skou)	Brookings Flash Flooding near Childrens Museum (Kellie Rhody)

Radar:

Additonal Radar Image (More Arriving at a Later Time)


LeMars, IA 940 PM	Minneota 80 MPH Winds 457pm

Storm Reports (Live and Interactive Display)

Report Time	County	Location	ST	Event Type	Mag.	Source	Remark
Fri Jun 17 2016 15:30:00 GMT-0500 (Central Daylight Time)	Cherokee	9 S Marcus	IA	TSTM WND DMG	0	public	tree down on a machine shed.
Fri Jun 17 2016 22:00:00 GMT-0500 (Central Daylight Time)	Lyon	Minneota	MN	TSTM WND GST	80	trained spotter	numerous trees down around town .
Fri Jun 17 2016 22:01:00 GMT-0500 (Central Daylight Time)	Lyon	Cottonwood	MN	TSTM WND GST	50	trained spotter	.
Fri Jun 17 2016 22:14:00 GMT-0500 (Central Daylight Time)	Lyon	Marshall	MN	TSTM WND GST	60	trained spotter	.
Fri Jun 17 2016 22:20:00 GMT-0500 (Central Daylight Time)	Lyon	Marshall	MN	TSTM WND GST	72	public	.
Fri Jun 17 2016 22:31:00 GMT-0500 (Central Daylight Time)	Lyon	5 NNW Tracy	MN	TSTM WND DMG	0	public	top of a grain elevator damaged.
Fri Jun 17 2016 22:40:00 GMT-0500 (Central Daylight Time)	Lyon	Tracy	MN	TSTM WND DMG	0	trained spotter	large tree blown down.
Fri Jun 17 2016 23:08:00 GMT-0500 (Central Daylight Time)	Brookings	2 NE Sinai	SD	HAIL	0.5	public	.
Fri Jun 17 2016 23:12:00 GMT-0500 (Central Daylight Time)	Cottonwood	Mountain Lake	MN	TSTM WND DMG	0	emergency mngr	large tree down across road.
Fri Jun 17 2016 23:28:00 GMT-0500 (Central Daylight Time)	Jackson	2 ENE Wilder	MN	TSTM WND GST	50	nws employee	.
Fri Jun 17 2016 23:40:00 GMT-0500 (Central Daylight Time)	Turner	Parker	SD	HAIL	1	public	.
Fri Jun 17 2016 23:40:00 GMT-0500 (Central Daylight Time)	Jackson	3 S Lakefield	MN	TSTM WND GST	53	mesonet	.
Fri Jun 17 2016 23:49:00 GMT-0500 (Central Daylight Time)	Brookings	Brookings	SD	HAIL	1.5	trained spotter	.
Sat Jun 18 2016 00:00:00 GMT-0500 (Central Daylight Time)	Brookings	Brookings	SD	FLASH FLOOD	0	emergency mngr	several streets are impassable due to high water.
Sat Jun 18 2016 00:01:00 GMT-0500 (Central Daylight Time)	Brookings	Brookings	SD	HAIL	1	public	report via social media.
Sat Jun 18 2016 00:05:00 GMT-0500 (Central Daylight Time)	Dickinson	1 ENE West Okoboji	IA	TSTM WND DMG	0	emergency mngr	8 inch diameter tree limb down on lakeshore drive.
Sat Jun 18 2016 00:18:00 GMT-0500 (Central Daylight Time)	Lake	Madison	SD	HAIL	1	trained spotter	.
Sat Jun 18 2016 00:21:00 GMT-0500 (Central Daylight Time)	Lake	Madison	SD	HAIL	1.75	trained spotter	.
Sat Jun 18 2016 00:24:00 GMT-0500 (Central Daylight Time)	Minnehaha	3 NNW Sioux Falls	SD	TSTM WND GST	49	official nws obs	.
Sat Jun 18 2016 00:28:00 GMT-0500 (Central Daylight Time)	Dickinson	Spirit Lake	IA	TSTM WND DMG	0	emergency mngr	8-12 inch tree limb down.
Sat Jun 18 2016 00:35:00 GMT-0500 (Central Daylight Time)	Minnehaha	Sioux Falls	SD	TSTM WND DMG	0	law enforcement	several trees down around town.
Sat Jun 18 2016 00:35:00 GMT-0500 (Central Daylight Time)	Lake	Wentworth	SD	TSTM WND DMG	0	emergency mngr	large trees down.
Sat Jun 18 2016 00:40:00 GMT-0500 (Central Daylight Time)	Brookings	Brookings	SD	FLASH FLOOD	0	public	car stuck near 6th street and main avenue. report and photo posted via social media.
Sat Jun 18 2016 00:40:00 GMT-0500 (Central Daylight Time)	Minnehaha	Garretson	SD	TSTM WND GST	50	emergency mngr	.
Sat Jun 18 2016 00:44:00 GMT-0500 (Central Daylight Time)	Minnehaha	Sherman	SD	HAIL	0.75	emergency mngr	.
Sat Jun 18 2016 01:30:00 GMT-0500 (Central Daylight Time)	Minnehaha	Hartford	SD	TSTM WND DMG	0	public	large tree down. report and photo posted via social media.
Sat Jun 18 2016 01:30:00 GMT-0500 (Central Daylight Time)	Mccook	Canistota	SD	TSTM WND DMG	0	trained spotter	trees down.
Sat Jun 18 2016 01:40:00 GMT-0500 (Central Daylight Time)	Sioux	Rock Valley	IA	TSTM WND DMG	0	emergency mngr	tree branches down and there was a power outage.
Sat Jun 18 2016 01:55:00 GMT-0500 (Central Daylight Time)	Sioux	Hawarden	IA	TSTM WND DMG	0	emergency mngr	numerous trees down across the area.
Sat Jun 18 2016 02:05:00 GMT-0500 (Central Daylight Time)	Turner	Viborg	SD	TSTM WND DMG	0	law enforcement	2-3 inches tree branches down in viborg and hurley.
Sat Jun 18 2016 02:20:00 GMT-0500 (Central Daylight Time)	Hutchinson	Menno	SD	HAIL	1.25	law enforcement	trees down around town.
Sat Jun 18 2016 02:25:00 GMT-0500 (Central Daylight Time)	Turner	Parker	SD	HAIL	1.75	law enforcement	time estimated by radar.
Sat Jun 18 2016 02:42:00 GMT-0500 (Central Daylight Time)	Plymouth	Le Mars	IA	TSTM WND GST	68	law enforcement	.
Sat Jun 18 2016 02:45:00 GMT-0500 (Central Daylight Time)	Plymouth	5 W Merrill	IA	TSTM WND DMG	0	public	shingles blown off.
Sat Jun 18 2016 03:10:00 GMT-0500 (Central Daylight Time)	Dixon	Newcastle	NE	TSTM WND DMG	0	law enforcement	trees down in the town.
Sat Jun 18 2016 03:12:00 GMT-0500 (Central Daylight Time)	Woodbury	Sioux City	IA	TSTM WND GST	61	asos	.
Sat Jun 18 2016 03:13:00 GMT-0500 (Central Daylight Time)	Plymouth	2 W Le Mars	IA	TSTM WND DMG	0	public	trees down in the area.
Sat Jun 18 2016 03:28:00 GMT-0500 (Central Daylight Time)	Plymouth	Kingsley	IA	HAIL	1	trained spotter	.
Sat Jun 18 2016 03:40:00 GMT-0500 (Central Daylight Time)	Woodbury	Sioux City	IA	TSTM WND GST	69	asos	.
Sat Jun 18 2016 03:44:00 GMT-0500 (Central Daylight Time)	Woodbury	5 N Lawton	IA	TSTM WND DMG	0	public	large tree down and damage to a barn.

Rain Reports

Location	State	Source	Rainfall
Lake Park 3.2 SSE	IA	CoCoRaHS	1.40
Lester 0.2 E	IA	CoCoRaHS	1.00
Orange City	IA	COOP	0.62
Sheldon	IA	COOP	0.62
Orange City	IA	AWOS	0.51
Sioux City ANG	IA	COOP	0.42
Sheldon	IA	AWOS	0.40
Sioux City	IA	ASOS	0.39
Sibley	IA	COOP	0.38
Spencer	IA	ASOS	0.37
Akron	IA	COOP	0.30
Holly Springs	IA	COOP	0.28
Everly 0.3 WSW	IA	CoCoRaHS	0.14
Cleghorn 2.5 NNE	IA	CoCoRaHS	0.11
Le Mars	IA	AWOS	0.05
Marshall 0.6 S	MN	CoCoRaHS	1.04
Lakefield	MN	COOP	0.97
Worthington	MN	COOP	0.78
Ghent 2.8 ENE	MN	CoCoRaHS	0.77
Marshall	MN	COOP	0.69
Luverne	MN	AWOS	0.54
Marshall	MN	AWOS	0.54
Slayton	MN	AWOS	0.48
Edgerton 0.5 W	MN	CoCoRaHS	0.48
Worthington	MN	AWOS	0.43
Pipestone	MN	COOP	0.37
Tracy	MN	AWOS	0.36
Pipestone	MN	AWOS	0.30
Jackson	MN	AWOS	0.29
Aurora 7.5 N	SD	CoCoRaHS	4.23
Brookings 0.5 E	SD	CoCoRaHS	4.20
White 1.3 ESE	SD	CoCoRaHS	3.38
White 0.4 WNW	SD	CoCoRaHS	3.22
Brookings 1.4 SW	SD	CoCoRaHS	3.10
Brookings 0.8 ESE	SD	CoCoRaHS	2.96
Madison	SD	COOP	2.90
Brookings 1.1 S	SD	CoCoRaHS	2.90
Brookings 0.2 SSW	SD	CoCoRaHS	2.87
Brookings 8.1 S	SD	CoCoRaHS	2.63
Astoria 2.2 SSE	SD	CoCoRaHS	2.16
Wagner 0.8 NW	SD	CoCoRaHS	1.75
Madison	SD	AWOS	1.59
Burke 10.5 SSE	SD	CoCoRaHS	1.53
Vermillion 0.6 SE	SD	CoCoRaHS	1.34
Chester	SD	COOP	1.31
Gayville 1.8 SSW	SD	CoCoRaHS	1.23
Yankton 1.7 NNE	SD	CoCoRaHS	1.12
Gayville 2.0 WNW	SD	CoCoRaHS	1.12
Springfield 7.6 WNW	SD	CoCoRaHS	1.07
Bonesteel 0.1 S	SD	CoCoRaHS	1.06
Tabor 3.9 S	SD	CoCoRaHS	1.06
Parker 6.8 WSW	SD	CoCoRaHS	1.05
Yankton	SD	COOP	1.02
Burke 6.7 S	SD	CoCoRaHS	1.00
Herrick 8.2 SSW	SD	CoCoRaHS	0.93
Sioux Falls 4.5 SSW	SD	CoCoRaHS	0.89
Tyndall	SD	COOP	0.88
Hudson 8.3 WNW	SD	CoCoRaHS	0.85
Harrisburg 2.5 NW	SD	CoCoRaHS	0.83
Burke 4.2 SW	SD	CoCoRaHS	0.79
Parkston 8.4 WNW	SD	CoCoRaHS	0.78
Herrick 4.5 NW	SD	CoCoRaHS	0.71
Herrick 0.1 NNW	SD	CoCoRaHS	0.66
Worthing 2.0 W	SD	CoCoRaHS	0.62
Marion 0.5 NE	SD	CoCoRaHS	0.59
Dell Rapids 0.9 WNW	SD	CoCoRaHS	0.59
Elk Point 5.6 NNE	SD	CoCoRaHS	0.58
Sioux Falls 4.1 SSE	SD	CoCoRaHS	0.57
Hurley 0.2 S	SD	CoCoRaHS	0.50
Garretson 4.2 SSE	SD	CoCoRaHS	0.50
Dimock 10.2 W	SD	CoCoRaHS	0.47
Dallas 8.8 S	SD	CoCoRaHS	0.42
Sioux Falls 3.4 WSW	SD	CoCoRaHS	0.38
Yankton	SD	AWOS	0.37
Armour 4.6 W	SD	CoCoRaHS	0.37
Renner 4.1 NW	SD	CoCoRaHS	0.33
Sioux Falls 3.9 SW	SD	CoCoRaHS	0.33
Sioux Falls 3.4 ESE	SD	CoCoRaHS	0.30
Parkston 6.6 S	SD	CoCoRaHS	0.30
Sioux Falls 1.1 SW	SD	CoCoRaHS	0.29
Sioux Falls 5.0 SE ARPT	SD	CoCoRaHS	0.26
Sioux Falls	SD	ASOS	0.24
Parkston 6.5 WSW	SD	CoCoRaHS	0.22
Alexandria 6.4 N	SD	CoCoRaHS	0.15
Pukwana 1.9 S	SD	CoCoRaHS	0.12
Burke 2.4 NE	SD	CoCoRaHS	0.10
Mitchell 1.7 SE	SD	CoCoRaHS	0.06
Academy	SD	COOP	0.03
Oldham 0.9 E	SD	CoCoRaHS	0.03
Mitchell	SD	ASOS	0.01

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