A strong warm front along with very unstable air and strong deep layer winds brought several supercell thunderstorns along with a damaging line of thunderstorms/bow echo to parts of central and northeast South Dakota during the afternoon hours.  Damaging winds up to 90 mph uprooted large trees and caused considerable structural and crop damage and loss of power to those in it's path. The worst wind damage was located at Lake Poinsett, Watertown, and Milbank.  A woman was killed and her husband was seriously injured on Lake Poinsett when their lake house was destroyed. Numerous trees were downed along with many structures damaged or destroyed. Many trees had fallen onto homes, cabins, and trailers. The bowling alley in Clear Lake lost its roof along with numerous pole barns being destroyed along the storms path. Thousands of people were also left without power. Four tornado touchdowns occurred along with hail up to the size of softballs. Isolated flash flooding also occurred.  Codington, Hamlin, Grant, and Deuel counties were all declared in a Federal Disaster Declaration. Total damage estimates were around 1,100,000 dollars.

Hail in SPINK, SOUTH DAKOTA
From 21-JUN-13 13:10:00 to 21-JUN-13 13:40:00 (CST-6)
Location: SPINK COLONY
Magnitude: 2.00 
Reported by: SHAVE Project

Large hail broke many windows in their house as hail lasted nearly thirty minutes with 2 to 3 inches of hail accumulating on the ground.

Hail in SPINK, SOUTH DAKOTA
From 21-JUN-13 13:45:00 to 21-JUN-13 14:10:00 (CST-6)
Location: GLENDALE COLONY
Magnitude: 1.00 
Reported by: SHAVE Project

Thunderstorm Wind in JONES, SOUTH DAKOTA
From 21-JUN-13 10:40:00 to 21-JUN-13 10:40:00 (CST-6)
Location: OKATON
Magnitude: 61.00 EG
Reported by: Public

Seventy mph winds were estimated.

Hail in SPINK, SOUTH DAKOTA
From 21-JUN-13 14:38:00 to 21-JUN-13 14:38:00 (CST-6)
Location: GLENDALE COLONY
Magnitude: 1.00 
Reported by: SHAVE Project

Hail in CORSON, SOUTH DAKOTA
From 21-JUN-13 10:25:00 to 21-JUN-13 10:25:00 (MST-7)
Location: MORRISTOWN
Magnitude: 2.75 
Reported by: Emergency Manager

Hail in CORSON, SOUTH DAKOTA
From 21-JUN-13 10:42:00 to 21-JUN-13 10:42:00 (MST-7)
Location: WATAUGA
Magnitude: 2.00 
Reported by: Public

Hail in SPINK, SOUTH DAKOTA
From 21-JUN-13 14:21:00 to 21-JUN-13 14:21:00 (CST-6)
Location: DOLAND
Magnitude: 1.75 
Reported by: SHAVE Project

Hail in SPINK, SOUTH DAKOTA
From 21-JUN-13 13:30:00 to 21-JUN-13 13:45:00 (CST-6)
Location: SPINK COLONY
Magnitude: 1.75 
Reported by: SHAVE Project

Thunderstorm Wind in JONES, SOUTH DAKOTA
From 21-JUN-13 10:30:00 to 21-JUN-13 10:30:00 (CST-6)
Location: OKATON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Sixty mph winds were estimated.

Thunderstorm Wind in HAMLIN, SOUTH DAKOTA
From 21-JUN-13 14:37:00 to 21-JUN-13 14:37:00 (CST-6)
Location: LAKE NORDEN
Magnitude: 56.00 EG
Reported by: Emergency Manager

Some tree damage occurred with estimated sixty-five mph winds.

Hail in HUGHES, SOUTH DAKOTA
From 21-JUN-13 11:44:00 to 21-JUN-13 11:44:00 (CST-6)
Location: (PIR)PIERRE ARPT
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in HYDE, SOUTH DAKOTA
From 21-JUN-13 11:56:00 to 21-JUN-13 11:56:00 (CST-6)
Location: HIGHMORE
Magnitude: 1.00 
Reported by: Emergency Manager

Hail in HYDE, SOUTH DAKOTA
From 21-JUN-13 12:25:00 to 21-JUN-13 12:25:00 (CST-6)
Location: STEPHAN
Magnitude: 1.00 
Reported by: Law Enforcement

Hail in JONES, SOUTH DAKOTA
From 21-JUN-13 11:10:00 to 21-JUN-13 11:30:00 (CST-6)
Location: MURDO
Magnitude: 0.88 
Reported by: SHAVE Project

Hail in JONES, SOUTH DAKOTA
From 21-JUN-13 11:00:00 to 21-JUN-13 11:30:00 (CST-6)
Location: MURDO
Magnitude: 0.88 
Reported by: SHAVE Project

Thunderstorm Wind in CLARK, SOUTH DAKOTA
From 21-JUN-13 14:40:00 to 21-JUN-13 14:40:00 (CST-6)
Location: ELROD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Sixty mph winds were reported.

Thunderstorm Wind in HAMLIN, SOUTH DAKOTA
From 21-JUN-13 14:51:00 to 21-JUN-13 14:51:00 (CST-6)
Location: LAKE NORDEN
Magnitude: 70.00 EG
Reported by: Public

Eighty mph winds were estimated near Lake Norden.

Hail in SPINK, SOUTH DAKOTA
From 21-JUN-13 12:27:00 to 21-JUN-13 12:27:00 (CST-6)
Location: TULARE
Magnitude: 1.00 
Reported by: Public

Thunderstorm Wind in CODINGTON, SOUTH DAKOTA
From 21-JUN-13 15:05:00 to 21-JUN-13 15:05:00 (CST-6)
Location: (ATY)WATERTOWN ARPT
Magnitude: 61.00 EG
Reported by: Emergency Manager

Emergency manager estimated winds to seventy mph near Lake Kampeska.

Hail in CORSON, SOUTH DAKOTA
From 21-JUN-13 10:04:00 to 21-JUN-13 10:24:00 (MST-7)
Location: KELDRON
Magnitude: 0.88 
Reported by: SHAVE Project

Hail in FAULK, SOUTH DAKOTA
From 21-JUN-13 11:44:00 to 21-JUN-13 12:00:00 (CST-6)
Location: ZELL
Magnitude: 0.88 
Reported by: SHAVE Project

Thunderstorm Wind in CODINGTON, SOUTH DAKOTA
From 21-JUN-13 15:07:00 to 21-JUN-13 15:07:00 (CST-6)
Location: (ATY)WATERTOWN ARPT
Magnitude: 56.00 MG
Reported by: ASOS

Hail in SPINK, SOUTH DAKOTA
From 21-JUN-13 12:45:00 to 21-JUN-13 13:05:00 (CST-6)
Location: DEITER ARPT
Magnitude: 0.88 
Reported by: SHAVE Project

Hail in HAND, SOUTH DAKOTA
From 21-JUN-13 12:40:00 to 21-JUN-13 12:40:00 (CST-6)
Location: REE HGTS
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in SPINK, SOUTH DAKOTA
From 21-JUN-13 14:41:00 to 21-JUN-13 14:41:00 (CST-6)
Location: FRANKFORT
Magnitude: 0.88 
Reported by: SHAVE Project

Hail in CODINGTON, SOUTH DAKOTA
From 21-JUN-13 13:08:00 to 21-JUN-13 13:08:00 (CST-6)
Location: HENRY
Magnitude: 1.00 
Reported by: Trained Spotter

Thunderstorm Wind in CODINGTON, SOUTH DAKOTA
From 21-JUN-13 15:10:00 to 21-JUN-13 15:10:00 (CST-6)
Location: (ATY)WATERTOWN ARPT
Magnitude: 71.00 MG
Property damage: 574.00K
Reported by: ASOS

Eighty mph winds caused extensive damage to trees along with many structures in and around Watertown. Many trees were downed.

Thunderstorm Wind in GRANT, SOUTH DAKOTA
From 21-JUN-13 15:55:00 to 21-JUN-13 15:55:00 (CST-6)
Location: MILBANK
Magnitude: 70.00 EG
Property damage: 131.00K
Reported by: Law Enforcement

Eighty mph winds caused major tree and structural damage in and around Milbank. Many trees were downed.

Thunderstorm Wind in HAMLIN, SOUTH DAKOTA
From 21-JUN-13 14:45:00 to 21-JUN-13 14:45:00 (CST-6)
Location: STONE BRIDGE
Magnitude: 78.00 EG
Property damage: 215.00K
Reported by: Emergency Manager

Severe tree and structural damage occurred on Lake Poinsett with ninety mph winds. A woman was killed and her husband was seriously injured when their lake house was destroyed. A man was also hospitalized for electric shock.

Hail in HAND, SOUTH DAKOTA
From 21-JUN-13 13:13:00 to 21-JUN-13 13:13:00 (CST-6)
Location: MILLER
Magnitude: 0.88 
Reported by: Emergency Manager

Hail in CODINGTON, SOUTH DAKOTA
From 21-JUN-13 13:17:00 to 21-JUN-13 13:17:00 (CST-6)
Location: (ATY)WATERTOWN ARPT
Magnitude: 0.88 
Reported by: Law Enforcement

Thunderstorm Wind in GRANT, SOUTH DAKOTA
From 21-JUN-13 16:10:00 to 21-JUN-13 16:10:00 (CST-6)
Location: TWIN BROOKS
Magnitude: 61.00 EG
Reported by: Trained Spotter

Several trees were downed along with many tree branches south of Corona.

Thunderstorm Wind in HAND, SOUTH DAKOTA
From 21-JUN-13 13:15:00 to 21-JUN-13 13:15:00 (CST-6)
Location: MILLER ARPT
Magnitude: 52.00 MG
Reported by: Mesonet

Hail in HAND, SOUTH DAKOTA
From 21-JUN-13 13:22:00 to 21-JUN-13 13:22:00 (CST-6)
Location: MILLER
Magnitude: 1.00 
Reported by: Law Enforcement

Hail in SPINK, SOUTH DAKOTA
From 21-JUN-13 13:25:00 to 21-JUN-13 13:25:00 (CST-6)
Location: SPINK COLONY
Magnitude: 4.00 
Reported by: SHAVE Project

Hail in HAMLIN, SOUTH DAKOTA
From 21-JUN-13 14:30:00 to 21-JUN-13 14:30:00 (CST-6)
Location: LAKE NORDEN
Magnitude: 2.50 
Reported by: Emergency Manager

Tornado in HAND, SOUTH DAKOTA
From 21-JUN-13 12:58:00 to 21-JUN-13 12:59:00 (CST-6)
Location: MILLER
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tornado touched down briefly with no damage reported.

Tornado in CLARK, SOUTH DAKOTA
From 21-JUN-13 13:55:00 to 21-JUN-13 13:57:00 (CST-6)
Location: CARPENTER
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A tornado touched down for a few minutes with no damage reported.

Thunderstorm Wind in HAND, SOUTH DAKOTA
From 21-JUN-13 12:45:00 to 21-JUN-13 12:45:00 (CST-6)
Location: REE HGTS
Magnitude: 70.00 EG
Reported by: CoCoRaHS

A large cottonwood tree was snapped at its base with a 100 foot by 40 foot quonset suffering damage.

Tornado in CLARK, SOUTH DAKOTA
From 21-JUN-13 14:08:00 to 21-JUN-13 14:11:00 (CST-6)
Location: CARPENTER
Tornado F-scale: EF0
Reported by: Public

A tornado touched down with no damage reported. The public reported over eighty mph inflow winds with some tree damage occurring.

Thunderstorm Wind in JONES, SOUTH DAKOTA
From 21-JUN-13 11:00:00 to 21-JUN-13 11:00:00 (CST-6)
Location: DRAPER
Magnitude: 52.00 EG
Reported by: Trained Spotter

Sixty mph winds were estimated.

Thunderstorm Wind in HAND, SOUTH DAKOTA
From 21-JUN-13 12:55:00 to 21-JUN-13 12:55:00 (CST-6)
Location: REE HGTS
Magnitude: 52.00 EG
Reported by: CoCoRaHS

Sixty mph winds downed several branches in Ree Heights.

Tornado in HAMLIN, SOUTH DAKOTA
From 21-JUN-13 14:34:00 to 21-JUN-13 14:38:00 (CST-6)
Location: LAKE NORDEN
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A rain wrapped tornado touched down with no damage reported.

Hail in CORSON, SOUTH DAKOTA
From 21-JUN-13 10:05:00 to 21-JUN-13 10:20:00 (MST-7)
Location: MORRISTOWN
Magnitude: 1.75 
Reported by: SHAVE Project

Hail in FAULK, SOUTH DAKOTA
From 21-JUN-13 12:00:00 to 21-JUN-13 12:10:00 (CST-6)
Location: ROCKHAM
Magnitude: 1.75 
Reported by: SHAVE Project

Thunderstorm Wind in HAND, SOUTH DAKOTA
From 21-JUN-13 13:15:00 to 21-JUN-13 13:15:00 (CST-6)
Location: MILLER
Magnitude: 52.00 EG
Reported by: Law Enforcement

Sixty mph winds blew over two large fuel tanks.

Thunderstorm Wind in CLARK, SOUTH DAKOTA
From 21-JUN-13 14:10:00 to 21-JUN-13 14:10:00 (CST-6)
Location: VIENNA
Magnitude: 70.00 EG
Reported by: Emergency Manager

Eighty mph winds downed several trees which blocked the highway.

Thunderstorm Wind in SPINK, SOUTH DAKOTA
From 21-JUN-13 13:20:00 to 21-JUN-13 13:20:00 (CST-6)
Location: SPINK COLONY
Magnitude: 61.00 EG
Reported by: Emergency Manager

Seventy mph winds damaged a building, windows, along with several trees.

Hail in FAULK, SOUTH DAKOTA
From 21-JUN-13 12:19:00 to 21-JUN-13 12:39:00 (CST-6)
Location: ZELL
Magnitude: 1.00 
Reported by: SHAVE Project

Thunderstorm Wind in HAMLIN, SOUTH DAKOTA
From 21-JUN-13 14:43:00 to 21-JUN-13 14:43:00 (CST-6)
Location: STONE BRIDGE
Magnitude: 78.00 EG
Reported by: Storm Chaser

Ninety mph winds caused major damage to buildings and barns at the intersection of highways 81 and 28.

Hail in SPINK, SOUTH DAKOTA
From 21-JUN-13 12:15:00 to 21-JUN-13 12:30:00 (CST-6)
Location: TULARE
Magnitude: 1.25 
Reported by: SHAVE Project

Hail in FAULK, SOUTH DAKOTA
From 21-JUN-13 12:20:00 to 21-JUN-13 12:35:00 (CST-6)
Location: ZELL
Magnitude: 1.25 
Reported by: SHAVE Project

Hail in SPINK, SOUTH DAKOTA
From 21-JUN-13 13:02:00 to 21-JUN-13 13:02:00 (CST-6)
Location: TULARE
Magnitude: 1.75 
Reported by: SHAVE Project

Thunderstorm Wind in HAMLIN, SOUTH DAKOTA
From 21-JUN-13 14:43:00 to 21-JUN-13 14:43:00 (CST-6)
Location: HAZEL
Magnitude: 70.00 EG
Reported by: Public

Many trees were downed in Hazel.

Thunderstorm Wind in CLARK, SOUTH DAKOTA
From 21-JUN-13 15:00:00 to 21-JUN-13 15:00:00 (CST-6)
Location: ELROD
Magnitude: 52.00 EG
Reported by: Trained Spotter

Sixty mph winds brought a large tree branch down onto a garage roof.

Hail in SPINK, SOUTH DAKOTA
From 21-JUN-13 12:30:00 to 21-JUN-13 12:45:00 (CST-6)
Location: TULARE
Magnitude: 1.75 
Reported by: SHAVE Project

Hail in SPINK, SOUTH DAKOTA
From 21-JUN-13 12:55:00 to 21-JUN-13 13:05:00 (CST-6)
Location: TULARE
Magnitude: 1.75 
Reported by: SHAVE Project

Thunderstorm Wind in DEUEL, SOUTH DAKOTA
From 21-JUN-13 15:25:00 to 21-JUN-13 15:25:00 (CST-6)
Location: CLEAR LAKE MUNI ARPT
Magnitude: 70.00 EG
Property damage: 193.00K
Reported by: Emergency Manager

Eighty mph winds caused major tree damage along with some structural damage in and around Clear Lake.  The roof of the bowling alley was severely damaged with the ITC storage shed tilted to it's side.

Thunderstorm Wind in GRANT, SOUTH DAKOTA
From 21-JUN-13 15:40:00 to 21-JUN-13 15:40:00 (CST-6)
Location: MILBANK
Magnitude: 70.00 EG
Reported by: Law Enforcement

Major tree and structural damage occurred in and around Milbank from eighty mph winds.

Hail in JONES, SOUTH DAKOTA
From 21-JUN-13 11:00:00 to 21-JUN-13 11:00:00 (CST-6)
Location: MURDO
Magnitude: 1.00 
Reported by: Broadcast Media

Hail in SPINK, SOUTH DAKOTA
From 21-JUN-13 12:40:00 to 21-JUN-13 12:55:00 (CST-6)
Location: TULARE
Magnitude: 1.00 
Reported by: SHAVE Project

Hail in SPINK, SOUTH DAKOTA
From 21-JUN-13 13:22:00 to 21-JUN-13 13:22:00 (CST-6)
Location: CRANDON
Magnitude: 1.75 
Reported by: SHAVE Project

Thunderstorm Wind in GRANT, SOUTH DAKOTA
From 21-JUN-13 15:50:00 to 21-JUN-13 15:50:00 (CST-6)
Location: MILBANK
Magnitude: 70.00 EG
Reported by: Trained Spotter

A lot of tree damage occurred along State Highway 15 into Milbank.

Thunderstorm Wind in HYDE, SOUTH DAKOTA
From 21-JUN-13 12:25:00 to 21-JUN-13 12:25:00 (CST-6)
Location: STEPHAN
Magnitude: 61.00 EG
Reported by: Law Enforcement

Seventy mph winds were estimated by law enforcement.

Thunderstorm Wind in LYMAN, SOUTH DAKOTA
From 21-JUN-13 12:20:00 to 21-JUN-13 12:20:00 (CST-6)
Location: OACOMA
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Flash Flood in HAND, SOUTH DAKOTA
From 21-JUN-13 13:45:00 to 21-JUN-13 16:45:00 (CST-6)
Location: DANFORTH
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flash flooding washed a culvert out of the road.

Funnel Cloud in HAND, SOUTH DAKOTA
From 21-JUN-13 12:48:00 to 21-JUN-13 12:49:00 (CST-6)
Location: MILLER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CORSON, SOUTH DAKOTA
From 21-JUN-13 10:12:00 to 21-JUN-13 10:12:00 (MST-7)
Location: KELDRON
Magnitude: 1.50 
Reported by: Public

Thunderstorm Wind in JONES, SOUTH DAKOTA
From 21-JUN-13 10:55:00 to 21-JUN-13 10:55:00 (CST-6)
Location: MURDO
Magnitude: 59.00 MG
Reported by: Mesonet

Hail in SPINK, SOUTH DAKOTA
From 21-JUN-13 12:45:00 to 21-JUN-13 13:00:00 (CST-6)
Location: CRANDON
Magnitude: 1.75 
Reported by: SHAVE Project

Hail in SPINK, SOUTH DAKOTA
From 21-JUN-13 13:30:00 to 21-JUN-13 13:45:00 (CST-6)
Location: SPINK COLONY
Magnitude: 4.00 
Reported by: SHAVE Project

Thunderstorm Wind in LYMAN, SOUTH DAKOTA
From 21-JUN-13 11:39:00 to 21-JUN-13 11:39:00 (CST-6)
Location: MC CLURE
Magnitude: 65.00 MG
Reported by: Mesonet

Hail in SPINK, SOUTH DAKOTA
From 21-JUN-13 13:25:00 to 21-JUN-13 13:45:00 (CST-6)
Location: SPINK COLONY
Magnitude: 3.50 
Reported by: SHAVE Project

Thunderstorm Wind in CLARK, SOUTH DAKOTA
From 21-JUN-13 13:54:00 to 21-JUN-13 13:54:00 (CST-6)
Location: CARPENTER
Magnitude: 66.00 EG
Reported by: Emergency Manager

Estimated wind gusts up to 75 mph.

Thunderstorm Wind in HAND, SOUTH DAKOTA
From 21-JUN-13 13:00:00 to 21-JUN-13 13:00:00 (CST-6)
Location: DANFORTH
Magnitude: 74.00 MG
Reported by: Mesonet