Numerous severe thunderstorms brought hail up to the size of golfballs, damaging winds over 70 mph, along with flash flooding to parts of north central and northeast South Dakota.

Hail in GRANT, SOUTH DAKOTA
From 22-JUL-11 18:45:00 to 22-JUL-11 18:45:00 (CST-6)
Location: STRANDBURG
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CORSON, SOUTH DAKOTA
From 22-JUL-11 21:30:00 to 22-JUL-11 21:30:00 (MST-7)
Location: MORRISTOWN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in MCPHERSON, SOUTH DAKOTA
From 22-JUL-11 23:45:00 to 22-JUL-11 23:45:00 (CST-6)
Location: EUREKA MUNI ARPT
Magnitude: 65.00 EG
Reported by: Law Enforcement

A fifty thousand bushel grain bin was destroyed along with a grain cart tipped over.

Thunderstorm Wind in CORSON, SOUTH DAKOTA
From 22-JUL-11 22:06:00 to 22-JUL-11 22:06:00 (MST-7)
Location: BULLHEAD
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in CORSON, SOUTH DAKOTA
From 22-JUL-11 22:30:00 to 22-JUL-11 22:30:00 (MST-7)
Location: WAKPALA
Magnitude: 61.00 EG
Reported by: Law Enforcement

Seventy mph winds were estimated.

Thunderstorm Wind in WALWORTH, SOUTH DAKOTA
From 22-JUL-11 23:40:00 to 22-JUL-11 23:40:00 (CST-6)
Location: MOBRIDGE
Magnitude: 61.00 EG
Reported by: Law Enforcement

Many tree branches were downed at the Indian Creek Recreation Area.

Thunderstorm Wind in MCPHERSON, SOUTH DAKOTA
From 22-JUL-11 23:45:00 to 22-JUL-11 23:45:00 (CST-6)
Location: EUREKA
Magnitude: 61.00 EG
Reported by: Trained Spotter

Seventy mph winds downed many tree branches along with several trees in Eureka. Some power lines were also downed from falling branches.

Thunderstorm Wind in WALWORTH, SOUTH DAKOTA
From 22-JUL-11 23:45:00 to 22-JUL-11 23:45:00 (CST-6)
Location: JAVA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Sixty mph winds were estimated in Java.

Thunderstorm Wind in MCPHERSON, SOUTH DAKOTA
From 23-JUL-11 00:15:00 to 23-JUL-11 00:15:00 (CST-6)
Location: LANGLAKE
Magnitude: 61.00 EG
Reported by: Public

Seventy mph winds broke off several four-inch posts, loosened some tin on a chicken coop and caused some minor shingle damage.

Thunderstorm Wind in WALWORTH, SOUTH DAKOTA
From 23-JUL-11 00:15:00 to 23-JUL-11 00:15:00 (CST-6)
Location: JAVA
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Many large tree branches were broken off.

Thunderstorm Wind in MCPHERSON, SOUTH DAKOTA
From 23-JUL-11 01:00:00 to 23-JUL-11 01:00:00 (CST-6)
Location: LANGLAKE
Magnitude: 65.00 EG
Reported by: Public

Seventy mph winds pushed in the twenty foot doors on a steel building and ripped some metal off the roof of another building. Also, several large branches were broken off.

Thunderstorm Wind in BROWN, SOUTH DAKOTA
From 23-JUL-11 01:30:00 to 23-JUL-11 01:30:00 (CST-6)
Location: HECLA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Sixty mph winds were estimated west of Hecla.

Hail in CODINGTON, SOUTH DAKOTA
From 22-JUL-11 16:00:00 to 22-JUL-11 16:15:00 (CST-6)
Location: RAUVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SHAVE Project

Hail in CODINGTON, SOUTH DAKOTA
From 22-JUL-11 16:15:00 to 22-JUL-11 16:30:00 (CST-6)
Location: SOUTH SHORE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SHAVE Project

Hail in GRANT, SOUTH DAKOTA
From 22-JUL-11 16:40:00 to 22-JUL-11 17:06:00 (CST-6)
Location: MARVIN
Magnitude: 1.75 
Reported by: SHAVE Project

Hail in GRANT, SOUTH DAKOTA
From 22-JUL-11 16:30:00 to 22-JUL-11 16:35:00 (CST-6)
Location: HILAND
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SHAVE Project

Hail in GRANT, SOUTH DAKOTA
From 22-JUL-11 16:20:00 to 22-JUL-11 16:35:00 (CST-6)
Location: HILAND
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SHAVE Project

Hail in GRANT, SOUTH DAKOTA
From 22-JUL-11 16:40:00 to 22-JUL-11 16:50:00 (CST-6)
Location: HILAND
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SHAVE Project

Hail in GRANT, SOUTH DAKOTA
From 22-JUL-11 16:58:00 to 22-JUL-11 17:12:00 (CST-6)
Location: MARVIN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SHAVE Project

Hail in CODINGTON, SOUTH DAKOTA
From 22-JUL-11 16:30:00 to 22-JUL-11 16:32:00 (CST-6)
Location: SOUTH SHORE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SHAVE Project

Flash Flood in CODINGTON, SOUTH DAKOTA
From 22-JUL-11 19:50:00 to 22-JUL-11 22:50:00 (CST-6)
Location: SOUTH SHORE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy rains of over 3 inches brought flash flooding of several roads west of South Shore.

Hail in GRANT, SOUTH DAKOTA
From 22-JUL-11 16:40:00 to 22-JUL-11 16:40:00 (CST-6)
Location: MARVIN
Magnitude: 1.75 
Reported by: Public

Hail in GRANT, SOUTH DAKOTA
From 22-JUL-11 16:30:00 to 22-JUL-11 16:40:00 (CST-6)
Location: HILAND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SHAVE Project

Hail in GRANT, SOUTH DAKOTA
From 22-JUL-11 16:45:00 to 22-JUL-11 17:00:00 (CST-6)
Location: HILAND
Magnitude: 1.75 
Reported by: SHAVE Project

Hail in GRANT, SOUTH DAKOTA
From 22-JUL-11 16:35:00 to 22-JUL-11 16:50:00 (CST-6)
Location: MARVIN
Magnitude: 1.25 
Reported by: SHAVE Project

Thunderstorm Wind in MCPHERSON, SOUTH DAKOTA
From 23-JUL-11 00:00:00 to 23-JUL-11 00:00:00 (CST-6)
Location: LONG LAKE
Magnitude: 70.00 EG
Reported by: Public

Eighty mph winds ripped a grain bin from the fasteners, pushed the north wall of a garage in, snapped several corral poles, tipped over a gain vac and feeder wagon,  moved a semi trailer four feet, and caused some minor damage to the house. Also, many branches were broken off along with several trees uprooted.

Flash Flood in GRANT, SOUTH DAKOTA
From 22-JUL-11 18:30:00 to 22-JUL-11 21:30:00 (CST-6)
Location: MARVIN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several roads were flooded by nearly 4 inches of rain.