A strong warm front brought many severe thunderstorms with large hail up to the size of golfballs along with very heavy rains which caused flash flooding.

Flash Flood in DEUEL, SOUTH DAKOTA
From 26-JUN-10 16:00:00 to 26-JUN-10 21:00:00 (CST-6)
Location: BRANDT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Very heavy rains caused the flash flooding of many area roads from Clear Lake to Brandt.

Flash Flood in HAND, SOUTH DAKOTA
From 26-JUN-10 16:30:00 to 26-JUN-10 18:00:00 (CST-6)
Location: DANFORTH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Very heavy rains caused the flash flooding of several locations on the county highway along with many other county and township roads.

Thunderstorm Wind in DEUEL, SOUTH DAKOTA
From 26-JUN-10 15:40:00 to 26-JUN-10 15:40:00 (CST-6)
Location: ASTORIA
Magnitude: 52.00 EG
Reported by: Law Enforcement

Sixty mph winds were estimated by law enforcement.

Hail in DEWEY, SOUTH DAKOTA
From 26-JUN-10 17:15:00 to 26-JUN-10 17:15:00 (MST-7)
Location: PROMISE
Magnitude: 1.00 
Reported by: Public

Hail in DEWEY, SOUTH DAKOTA
From 26-JUN-10 17:30:00 to 26-JUN-10 17:30:00 (MST-7)
Location: MOREAU
Magnitude: 1.50 
Reported by: Public

Large hail combined with strong winds caused damage to the house and the car.

Hail in DEWEY, SOUTH DAKOTA
From 26-JUN-10 17:45:00 to 26-JUN-10 17:45:00 (MST-7)
Location: MOREAU
Magnitude: 1.25 
Reported by: Public

Large hail combined with strong winds cracked many windows on the house along with damaging the screen door.

Hail in DEWEY, SOUTH DAKOTA
From 26-JUN-10 17:45:00 to 26-JUN-10 17:45:00 (MST-7)
Location: PROMISE
Magnitude: 1.75 
Reported by: Public

Hail in WALWORTH, SOUTH DAKOTA
From 26-JUN-10 18:48:00 to 26-JUN-10 18:48:00 (CST-6)
Location: AKASKA
Magnitude: 1.50 
Reported by: Public

Hail in WALWORTH, SOUTH DAKOTA
From 26-JUN-10 19:00:00 to 26-JUN-10 19:00:00 (CST-6)
Location: LOWRY
Magnitude: 1.25 
Reported by: Law Enforcement

Large hail broke the windows on a truck driving on the road.

Hail in CAMPBELL, SOUTH DAKOTA
From 26-JUN-10 19:10:00 to 26-JUN-10 19:10:00 (CST-6)
Location: HERREID MUNI ARPT
Magnitude: 1.00 
Reported by: Public

Hail in CAMPBELL, SOUTH DAKOTA
From 26-JUN-10 19:25:00 to 26-JUN-10 19:25:00 (CST-6)
Location: ARTAS
Magnitude: 1.50 
Reported by: Law Enforcement

Thunderstorm Wind in DEUEL, SOUTH DAKOTA
From 26-JUN-10 15:30:00 to 26-JUN-10 15:30:00 (CST-6)
Location: BRANDT
Magnitude: 61.00 EG
Reported by: Law Enforcement

About half the roof was taken off the butcher shop in Brandt.

Thunderstorm Wind in POTTER, SOUTH DAKOTA
From 26-JUN-10 20:25:00 to 26-JUN-10 20:25:00 (CST-6)
Location: LEBANON
Magnitude: 52.00 EG
Reported by: Public

Sixty mph winds blew the chicken coop next to the grain bin.

Flash Flood in HAMLIN, SOUTH DAKOTA
From 26-JUN-10 19:00:00 to 26-JUN-10 21:00:00 (CST-6)
Location: HAZEL
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Many township roads were flooded throughout Hamlin county with several of the roads being washed out.

Hail in DEUEL, SOUTH DAKOTA
From 26-JUN-10 13:59:00 to 26-JUN-10 13:59:00 (CST-6)
Location: JOHNSONVILLE
Magnitude: 2.00 
Reported by: Trained Spotter

Hail in DEUEL, SOUTH DAKOTA
From 26-JUN-10 14:16:00 to 26-JUN-10 14:16:00 (CST-6)
Location: TORONTO
Magnitude: 1.75 
Reported by: Trained Spotter

Hail in HAMLIN, SOUTH DAKOTA
From 26-JUN-10 14:49:00 to 26-JUN-10 14:49:00 (CST-6)
Location: LAKE NORDEN
Magnitude: 1.00 
Reported by: Law Enforcement

Hail in HAMLIN, SOUTH DAKOTA
From 26-JUN-10 14:55:00 to 26-JUN-10 14:55:00 (CST-6)
Location: STONE BRIDGE
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in HAMLIN, SOUTH DAKOTA
From 26-JUN-10 15:00:00 to 26-JUN-10 15:00:00 (CST-6)
Location: LAKE NORDEN
Magnitude: 1.50 
Reported by: Public

Hail in HAMLIN, SOUTH DAKOTA
From 26-JUN-10 15:02:00 to 26-JUN-10 15:02:00 (CST-6)
Location: LAKE NORDEN
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in HAMLIN, SOUTH DAKOTA
From 26-JUN-10 15:02:00 to 26-JUN-10 15:02:00 (CST-6)
Location: DEMPSTER
Magnitude: 0.88 
Reported by: Trained Spotter

Hail in DEUEL, SOUTH DAKOTA
From 26-JUN-10 15:30:00 to 26-JUN-10 15:30:00 (CST-6)
Location: BRANDT
Magnitude: 1.00 
Reported by: Public

Hail in HAND, SOUTH DAKOTA
From 26-JUN-10 15:30:00 to 26-JUN-10 15:30:00 (CST-6)
Location: DANFORTH
Magnitude: 1.25 
Reported by: Public

Hail in DEWEY, SOUTH DAKOTA
From 26-JUN-10 17:05:00 to 26-JUN-10 17:05:00 (MST-7)
Location: PROMISE
Magnitude: 0.88 
Reported by: Public

Hail in HAMLIN, SOUTH DAKOTA
From 26-JUN-10 14:50:00 to 26-JUN-10 14:50:00 (CST-6)
Location: LAKE NORDEN
Magnitude: 1.75 
Reported by: Park/Forest Service