A second long track severe thunderstorm moved out of western South Dakota and across central South Dakota through the evening hours. This storm produced large hail up to 2 inches along with winds to nearly 90 mph as it moved across the region. A nearly continuous path of destruction occurred from northwest Stanley county east through central Sully county and across northern Hyde county. The path was nearly 90 miles across this area with a path width varying from 2 to 5 miles. Tens of thousands of acres of crops and pastureland were destroyed by this storm with some farmers losing up to 15,000 acres alone.
The hail and wind storm also wreaked havoc on vehicles, buildings, and windows. Campers were toppled, grain bins and building siding were damaged with some roofs being blown off some structures.  Also, some wildlife, including birds and deer, were killed from the storm. Thirty-two power poles were downed west of Onida along with three transmission poles broken or leaning, leaving many without electricity through the night. Power lines and poles on the roads halted travel for some areas. This storm crossed some of the same areas in Sully county that were hit by destructive hail on June 27th. This hail and wind storm had began in Wyoming and traveled over 420 miles before it ended in eastern South Dakota.

Thunderstorm Wind in STANLEY, SOUTH DAKOTA
From 29-JUN-18 18:25:00 to 29-JUN-18 18:25:00 (MST-7)
Location: HAYES HAMILTON ARPT
Magnitude: 78.00 MG
Reported by: Mesonet

Thunderstorm Wind in STANLEY, SOUTH DAKOTA
From 29-JUN-18 18:25:00 to 29-JUN-18 18:25:00 (MST-7)
Location: HAYES
Magnitude: 52.00 MG
Reported by: Mesonet

Thunderstorm Wind in STANLEY, SOUTH DAKOTA
From 29-JUN-18 18:24:00 to 29-JUN-18 18:24:00 (MST-7)
Location: HAYES HAMILTON ARPT
Magnitude: 69.00 MG
Reported by: Mesonet

Thunderstorm Wind in SULLY, SOUTH DAKOTA
From 29-JUN-18 20:34:00 to 29-JUN-18 20:34:00 (CST-6)
Location: ONIDA MUNI ARPT
Magnitude: 61.00 EG
Reported by: Public

Severe winds along with large hail broke all windows on one side of the house.

Thunderstorm Wind in SULLY, SOUTH DAKOTA
From 29-JUN-18 20:32:00 to 29-JUN-18 20:32:00 (CST-6)
Location: ONIDA MUNI ARPT
Magnitude: 70.00 EG
Reported by: COOP Observer

Estimated eighty mph winds downed several miles of power poles with some falling onto and blocking the road.

Thunderstorm Wind in STANLEY, SOUTH DAKOTA
From 29-JUN-18 18:33:00 to 29-JUN-18 18:33:00 (MST-7)
Location: HAYES AIRSTRIP
Magnitude: 61.00 EG
Reported by: COOP Observer

Seventy mph winds were estimated.

Hail in STANLEY, SOUTH DAKOTA
From 29-JUN-18 18:32:00 to 29-JUN-18 18:32:00 (MST-7)
Location: ORTON
Magnitude: 1.50 
Reported by: Public

Thunderstorm Wind in HUGHES, SOUTH DAKOTA
From 29-JUN-18 20:18:00 to 29-JUN-18 20:18:00 (CST-6)
Location: (PIR)PIERRE ARPT
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in SULLY, SOUTH DAKOTA
From 29-JUN-18 20:35:00 to 29-JUN-18 20:35:00 (CST-6)
Location: ONIDA MUNI ARPT
Magnitude: 56.00 MG
Reported by: AWOS

Hail in STANLEY, SOUTH DAKOTA
From 29-JUN-18 18:54:00 to 29-JUN-18 18:54:00 (MST-7)
Location: ORTON
Magnitude: 2.00 
Reported by: COOP Observer

Hail in STANLEY, SOUTH DAKOTA
From 29-JUN-18 18:20:00 to 29-JUN-18 19:00:00 (MST-7)
Location: HAYES HAMILTON ARPT
Magnitude: 2.00 
Reported by: Newspaper

A severe thunderstorm from western South Dakota tracked across northern Stanley county and into Sully county bringing large hail up to 2 inches and winds up to ninety mph destroying thousands of acres of crops and pastureland. The hail and severe winds also caused some property damage along the path of the storm.

Hail in SULLY, SOUTH DAKOTA
From 29-JUN-18 20:26:00 to 29-JUN-18 20:26:00 (CST-6)
Location: ONIDA MUNI ARPT
Magnitude: 1.00 
Reported by: COOP Observer

Hail in HYDE, SOUTH DAKOTA
From 29-JUN-18 21:15:00 to 29-JUN-18 21:15:00 (CST-6)
Location: HIGHMORE ARPT
Magnitude: 1.75 
Reported by: Storm Chaser

Hail in SULLY, SOUTH DAKOTA
From 29-JUN-18 20:00:00 to 29-JUN-18 20:55:00 (CST-6)
Location: GALLAGHER
Magnitude: 1.75 
Reported by: Newspaper

A severe thunderstorm moved out of northern Stanley county and across central Sully county bringing golf ball hail and winds up to eighty mph. The hail and winds created a path of crop and pasture destruction as it moved east into northern Hyde county. There was also some property damage along the storms path.

Hail in HYDE, SOUTH DAKOTA
From 29-JUN-18 20:55:00 to 29-JUN-18 21:18:00 (CST-6)
Location: HOLABIRD
Magnitude: 1.50 
Reported by: Newspaper

A severe thunderstorm from Sully county moved into northern Hyde county and brought damaging hail and winds. Countless acres of crops and pasture were destroyed along the storms path. There was also some property damage as a result.

Hail in SPINK, SOUTH DAKOTA
From 29-JUN-18 22:10:00 to 29-JUN-18 22:10:00 (CST-6)
Location: ASHTON
Magnitude: 1.25 
Reported by: Public