Severe thunderstorms developed in the early morning hours over Jones County. A second round of severe thunderstorms occurred in the late evening and overnight hours along a cold front moving east across the region, mainly effecting Brown and Day counties. Large hail and winds of 80-90 mph occurred in Day county.

Hail in BROWN, SOUTH DAKOTA
From 01-AUG-16 19:48:00 to 01-AUG-16 19:48:00 (CST-6)
Location: FREDERICK
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in BROWN, SOUTH DAKOTA
From 01-AUG-16 20:15:00 to 01-AUG-16 20:15:00 (CST-6)
Location: FREDERICK
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Sixty mph winds were estimated.

Hail in BROWN, SOUTH DAKOTA
From 01-AUG-16 20:15:00 to 01-AUG-16 20:15:00 (CST-6)
Location: FREDERICK
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BROWN, SOUTH DAKOTA
From 01-AUG-16 22:03:00 to 01-AUG-16 22:03:00 (CST-6)
Location: GROTON MUNI ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BROWN, SOUTH DAKOTA
From 01-AUG-16 22:05:00 to 01-AUG-16 22:05:00 (CST-6)
Location: GROTON MUNI ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in DAY, SOUTH DAKOTA
From 01-AUG-16 22:40:00 to 01-AUG-16 22:40:00 (CST-6)
Location: ANDOVER
Magnitude: 1.75 
Reported by: Public

Thunderstorm Wind in DAY, SOUTH DAKOTA
From 01-AUG-16 23:08:00 to 01-AUG-16 23:08:00 (CST-6)
Location: LILY
Magnitude: 56.00 EG
Reported by: Public

Sixty-five mph winds downed many large tree limbs along with damaging some crops.

Thunderstorm Wind in JONES, SOUTH DAKOTA
From 01-AUG-16 02:02:00 to 01-AUG-16 02:02:00 (CST-6)
Location: MURDO MUNI ARPT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in JONES, SOUTH DAKOTA
From 01-AUG-16 02:25:00 to 01-AUG-16 02:25:00 (CST-6)
Location: DRAPER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Sixty mph winds were estimated.

Thunderstorm Wind in BROWN, SOUTH DAKOTA
From 01-AUG-16 21:15:00 to 01-AUG-16 21:15:00 (CST-6)
Location: WESTPORT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Sixty mph winds were estimated.

Thunderstorm Wind in BROWN, SOUTH DAKOTA
From 01-AUG-16 22:03:00 to 01-AUG-16 22:03:00 (CST-6)
Location: GROTON MUNI ARPT
Magnitude: 68.00 MG
Reported by: Public

Thunderstorm Wind in DAY, SOUTH DAKOTA
From 01-AUG-16 22:40:00 to 01-AUG-16 22:40:00 (CST-6)
Location: ANDOVER
Magnitude: 70.00 EG
Reported by: Emergency Manager

Eighty mph winds downed numerous trees in Andover along with many power poles. There was damage to vehicles and buildings from large hail and high winds. Windows were broken and siding was damaged. There was also extensive damage to crops near Andover with hail piled up to a foot or so in ditches.

Thunderstorm Wind in BROWN, SOUTH DAKOTA
From 01-AUG-16 22:07:00 to 01-AUG-16 22:07:00 (CST-6)
Location: GROTON
Magnitude: 56.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Sixty-five mph winds downed many tree branches along with some trees in Groton.

Thunderstorm Wind in BROWN, SOUTH DAKOTA
From 01-AUG-16 22:40:00 to 01-AUG-16 22:40:00 (CST-6)
Location: GROTON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Building removed from foundation and moved to the east.

Thunderstorm Wind in DAY, SOUTH DAKOTA
From 01-AUG-16 22:41:00 to 01-AUG-16 22:41:00 (CST-6)
Location: ANDOVER
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Damage to fabric roof of Wheat Grower's hoop barn.

Thunderstorm Wind in DAY, SOUTH DAKOTA
From 01-AUG-16 22:42:00 to 01-AUG-16 22:42:00 (CST-6)
Location: BRISTOL
Magnitude: 70.00 EG
Reported by: Emergency Manager

A sixty by eighty foot building was destroyed by eighty mph winds.

Thunderstorm Wind in DAY, SOUTH DAKOTA
From 01-AUG-16 22:40:00 to 01-AUG-16 22:40:00 (CST-6)
Location: ANDOVER
Magnitude: 70.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Eighty mph winds took the roof off a barn and completely destroyed a metal hoop barn.

Thunderstorm Wind in DAY, SOUTH DAKOTA
From 01-AUG-16 22:41:00 to 01-AUG-16 22:41:00 (CST-6)
Location: ANDOVER
Magnitude: 78.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Eight empty rail cars were derailed by ninety mph winds.