Severe thunderstorms developed along the North Dakota border along a weak frontal zone and expanded into a line and moved quickly east across north central and northeast South Dakota into the early morning hours. These storms brought damaging winds up to over 90 mph as they moved east and into west central Minnesota into the early morning hours. Tree damage, power poles down, structural damage, along with some campers flipped were some of the effects from the storms.

Thunderstorm Wind in MARSHALL, SOUTH DAKOTA
From 10-AUG-16 01:42:00 to 10-AUG-16 01:42:00 (CST-6)
Location: HILLHEAD
Magnitude: 78.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Estimated ninety mph winds broke off many trees along with collapsing a barn.

Thunderstorm Wind in CAMPBELL, SOUTH DAKOTA
From 09-AUG-16 22:09:00 to 09-AUG-16 22:09:00 (CST-6)
Location: ARTAS
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: Public

An estimated seventy mph wind occurred near Artas.

Thunderstorm Wind in DEWEY, SOUTH DAKOTA
From 09-AUG-16 22:05:00 to 09-AUG-16 22:05:00 (MST-7)
Location: FIRESTEEL
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Sixty mph winds were estimated.

Thunderstorm Wind in MCPHERSON, SOUTH DAKOTA
From 09-AUG-16 23:35:00 to 09-AUG-16 23:35:00 (CST-6)
Location: LONG LAKE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Sixty mph winds were estimated.

Thunderstorm Wind in WALWORTH, SOUTH DAKOTA
From 10-AUG-16 00:30:00 to 10-AUG-16 00:30:00 (CST-6)
Location: SELBY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Sixty mph winds were estimated.

Thunderstorm Wind in DEWEY, SOUTH DAKOTA
From 09-AUG-16 21:40:00 to 09-AUG-16 21:40:00 (MST-7)
Location: TRAIL CITY
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in EDMUNDS, SOUTH DAKOTA
From 10-AUG-16 00:55:00 to 10-AUG-16 00:55:00 (CST-6)
Location: CRAVEN
Magnitude: 72.00 MG
Crop damage: 0.00K
Reported by: Mesonet

Hail in CAMPBELL, SOUTH DAKOTA
From 09-AUG-16 20:47:00 to 09-AUG-16 20:47:00 (CST-6)
Location: POLLOCK
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MCPHERSON, SOUTH DAKOTA
From 09-AUG-16 23:00:00 to 09-AUG-16 23:00:00 (CST-6)
Location: EUREKA MUNI ARPT
Magnitude: 2.00 
Reported by: Public

Hail in MCPHERSON, SOUTH DAKOTA
From 09-AUG-16 23:15:00 to 09-AUG-16 23:15:00 (CST-6)
Location: MADRA
Magnitude: 2.75 
Reported by: Public

Hail in MCPHERSON, SOUTH DAKOTA
From 09-AUG-16 23:30:00 to 09-AUG-16 23:30:00 (CST-6)
Location: LONG LAKE
Magnitude: 1.50 
Reported by: Public

Hail in EDMUNDS, SOUTH DAKOTA
From 10-AUG-16 01:24:00 to 10-AUG-16 01:24:00 (CST-6)
Location: ROSCOE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in CAMPBELL, SOUTH DAKOTA
From 09-AUG-16 21:30:00 to 09-AUG-16 21:30:00 (CST-6)
Location: HERREID MUNI ARPT
Magnitude: 65.00 EG
Crop damage: 0.00K
Reported by: Law Enforcement

An estimated seventy-five mph wind flipped several campers with one minor injury reported.

Thunderstorm Wind in WALWORTH, SOUTH DAKOTA
From 09-AUG-16 23:47:00 to 09-AUG-16 23:47:00 (CST-6)
Location: JAVA JCT
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: Law Enforcement

Seventy mph winds downed several trees along with many branches at Lake Hiddenwood.

Thunderstorm Wind in CORSON, SOUTH DAKOTA
From 09-AUG-16 21:00:00 to 09-AUG-16 21:00:00 (MST-7)
Location: MC INTOSH
Magnitude: 65.00 EG
Crop damage: 0.00K
Reported by: Law Enforcement

Seventy-five mph winds brought many power poles down from Mcintosh to several miles south on Highway 65. A Quonset was also blown across Highway 65.

Thunderstorm Wind in CORSON, SOUTH DAKOTA
From 09-AUG-16 20:46:00 to 09-AUG-16 20:46:00 (MST-7)
Location: ATHBOY
Magnitude: 64.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in CAMPBELL, SOUTH DAKOTA
From 09-AUG-16 21:50:00 to 09-AUG-16 21:50:00 (CST-6)
Location: HERREID MUNI ARPT
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in CORSON, SOUTH DAKOTA
From 09-AUG-16 21:40:00 to 09-AUG-16 21:40:00 (MST-7)
Location: MC LAUGHLIN
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in CORSON, SOUTH DAKOTA
From 09-AUG-16 21:45:00 to 09-AUG-16 21:45:00 (MST-7)
Location: MC LAUGHLIN
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in CORSON, SOUTH DAKOTA
From 09-AUG-16 21:50:00 to 09-AUG-16 21:50:00 (MST-7)
Location: LITTLE EAGLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Sixty mph winds were estimated.

Thunderstorm Wind in CORSON, SOUTH DAKOTA
From 09-AUG-16 09:55:00 to 09-AUG-16 09:55:00 (MST-7)
Location: MAHTO
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in CORSON, SOUTH DAKOTA
From 09-AUG-16 21:20:00 to 09-AUG-16 21:20:00 (MST-7)
Location: BULLHEAD
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in CORSON, SOUTH DAKOTA
From 09-AUG-16 21:55:00 to 09-AUG-16 21:55:00 (MST-7)
Location: MAHTO
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in WALWORTH, SOUTH DAKOTA
From 09-AUG-16 23:20:00 to 09-AUG-16 23:20:00 (CST-6)
Location: MOBRIDGE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Sixty-five mph winds were estimated.

Thunderstorm Wind in WALWORTH, SOUTH DAKOTA
From 09-AUG-16 23:42:00 to 09-AUG-16 23:42:00 (CST-6)
Location: SELBY
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: Law Enforcement

Seventy mph winds were estimated.

Thunderstorm Wind in MCPHERSON, SOUTH DAKOTA
From 10-AUG-16 00:00:00 to 10-AUG-16 00:00:00 (CST-6)
Location: LONG LAKE
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in BROWN, SOUTH DAKOTA
From 10-AUG-16 01:00:00 to 10-AUG-16 01:00:00 (CST-6)
Location: WINSHIP
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in BROWN, SOUTH DAKOTA
From 10-AUG-16 01:12:00 to 10-AUG-16 01:12:00 (CST-6)
Location: (ABR)ABERDEEN RGNL A
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Thunderstorm Wind in EDMUNDS, SOUTH DAKOTA
From 10-AUG-16 00:53:00 to 10-AUG-16 00:53:00 (CST-6)
Location: IPSWICH
Magnitude: 65.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Seventy-five mph winds brought many trees down along with many large branches throughout Ipswich.

Thunderstorm Wind in MARSHALL, SOUTH DAKOTA
From 10-AUG-16 01:35:00 to 10-AUG-16 01:35:00 (CST-6)
Location: BRITTON MUNI ARPT
Magnitude: 63.00 MG
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in MARSHALL, SOUTH DAKOTA
From 10-AUG-16 01:41:00 to 10-AUG-16 01:41:00 (CST-6)
Location: HILLHEAD
Magnitude: 80.00 MG
Reported by: Mesonet

Thunderstorm Wind in MARSHALL, SOUTH DAKOTA
From 10-AUG-16 01:49:00 to 10-AUG-16 01:49:00 (CST-6)
Location: VEBLEN
Magnitude: 52.00 EG
Crop damage: 0.00K
Reported by: Trained Spotter

Sixty mph winds brought several tree branches down.

Thunderstorm Wind in MARSHALL, SOUTH DAKOTA
From 10-AUG-16 01:40:00 to 10-AUG-16 01:40:00 (CST-6)
Location: HILLHEAD
Magnitude: 78.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Ninety mph winds brought down nine power poles.