Numerous thunderstorms developed along a stationary front extending from west to east across eastern South Dakota. Large hail up to tennis ball size, wind gusts to near sixty-five mph, along with flash flooding occurred during the late evening and overnight across parts of central and northeast South Dakota. The training of the thunderstorms over the same area brought extreme rainfall amounts of 4 to 11 inches across parts of northern Hand and southern Spink counties. Some rainfall amounts included, 6 inches 2 miles west of Tulare, 7.05 inches in Polo, 8.40 inches 2 miles southwest of Polo, 10.50 inches 2.5 miles southeast of Polo, and 11 inches 3 miles south southwest of Polo.

Flash Flood in HAND, SOUTH DAKOTA
From 03-JUL-18 01:00:00 to 03-JUL-18 07:00:00 (CST-6)
Location: VAYLAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Township and county roads were underwater from very heavy rainfall.

Flash Flood in HAND, SOUTH DAKOTA
From 03-JUL-18 01:30:00 to 03-JUL-18 07:00:00 (CST-6)
Location: POLO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Extreme rainfall of eleven inches caused flash flooding with many roads under water.

Hail in SPINK, SOUTH DAKOTA
From 02-JUL-18 19:05:00 to 02-JUL-18 19:05:00 (CST-6)
Location: TULARE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in HAND, SOUTH DAKOTA
From 02-JUL-18 20:05:00 to 02-JUL-18 20:05:00 (CST-6)
Location: MILLER ARPT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in HAND, SOUTH DAKOTA
From 02-JUL-18 20:40:00 to 02-JUL-18 20:40:00 (CST-6)
Location: MILLER
Magnitude: 1.50 
Reported by: Emergency Manager

Hail in HAND, SOUTH DAKOTA
From 02-JUL-18 21:00:00 to 02-JUL-18 21:00:00 (CST-6)
Location: POLO
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in HAND, SOUTH DAKOTA
From 02-JUL-18 21:04:00 to 02-JUL-18 21:04:00 (CST-6)
Location: POLO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in HAND, SOUTH DAKOTA
From 02-JUL-18 21:27:00 to 02-JUL-18 21:27:00 (CST-6)
Location: POLO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in CLARK, SOUTH DAKOTA
From 02-JUL-18 21:45:00 to 02-JUL-18 21:45:00 (CST-6)
Location: WILLOW LAKE
Magnitude: 1.00 
Reported by: Public

Quarter size hail and strong winds damaged many acres of corn and beans.

Hail in HAMLIN, SOUTH DAKOTA
From 02-JUL-18 22:09:00 to 02-JUL-18 22:09:00 (CST-6)
Location: HAZEL
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in HAND, SOUTH DAKOTA
From 02-JUL-18 22:44:00 to 02-JUL-18 22:44:00 (CST-6)
Location: POLO
Magnitude: 2.50 
Reported by: Public

Hail in FAULK, SOUTH DAKOTA
From 02-JUL-18 23:39:00 to 02-JUL-18 23:39:00 (CST-6)
Location: ORIENT
Magnitude: 1.75 
Reported by: Public

Golf ball hail damaged many acres of corn and beans.

Hail in FAULK, SOUTH DAKOTA
From 02-JUL-18 23:40:00 to 02-JUL-18 23:40:00 (CST-6)
Location: ORIENT
Magnitude: 1.50 
Reported by: Trained Spotter

Hail in HAND, SOUTH DAKOTA
From 02-JUL-18 23:40:00 to 02-JUL-18 23:40:00 (CST-6)
Location: POLO
Magnitude: 1.00 
Reported by: Public

Hail in HAND, SOUTH DAKOTA
From 03-JUL-18 00:00:00 to 03-JUL-18 00:00:00 (CST-6)
Location: POLO
Magnitude: 1.00 
Reported by: Public

Many acres of corn were stripped by quarter size hail.

Hail in HAND, SOUTH DAKOTA
From 03-JUL-18 01:00:00 to 03-JUL-18 01:00:00 (CST-6)
Location: POLO
Magnitude: 1.50 
Reported by: Public

Hail in FAULK, SOUTH DAKOTA
From 03-JUL-18 02:00:00 to 03-JUL-18 02:00:00 (CST-6)
Location: ONAKA
Magnitude: 1.00 
Reported by: Public

Quarter hail damaged the bean crop and peeled paint of a building.

Thunderstorm Wind in ROBERTS, SOUTH DAKOTA
From 03-JUL-18 08:35:00 to 03-JUL-18 08:35:00 (CST-6)
Location: SISSETON ARPT
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Funnel Cloud in SPINK, SOUTH DAKOTA
From 02-JUL-18 19:20:00 to 02-JUL-18 19:20:00 (CST-6)
Location: TULARE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in SPINK, SOUTH DAKOTA
From 02-JUL-18 19:15:00 to 02-JUL-18 19:15:00 (CST-6)
Location: TULARE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BROWN, SOUTH DAKOTA
From 02-JUL-18 19:47:00 to 02-JUL-18 19:47:00 (CST-6)
Location: HOUGHTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public