A line of thunderstorms moved from west to east across north central and northeast South Dakota during the early morning hours bringing mainly damaging winds along with some isolated flash flooding.

Thunderstorm Wind in STANLEY, SOUTH DAKOTA
From 03-JUL-18 23:00:00 to 03-JUL-18 23:00:00 (MST-7)
Location: HAYES HAMILTON ARPT
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in STANLEY, SOUTH DAKOTA
From 03-JUL-18 23:08:00 to 03-JUL-18 23:08:00 (MST-7)
Location: HAYES
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in DEWEY, SOUTH DAKOTA
From 03-JUL-18 23:09:00 to 03-JUL-18 23:09:00 (MST-7)
Location: EAGLE BUTTE
Magnitude: 61.00 MG
Reported by: Mesonet

Thunderstorm Wind in SULLY, SOUTH DAKOTA
From 04-JUL-18 00:55:00 to 04-JUL-18 00:55:00 (CST-6)
Location: ONIDA MUNI ARPT
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in WALWORTH, SOUTH DAKOTA
From 04-JUL-18 00:55:00 to 04-JUL-18 00:55:00 (CST-6)
Location: (Y26)MOBRIDGE ARPT
Magnitude: 83.00 MG
Reported by: ASOS

Thunderstorm Wind in POTTER, SOUTH DAKOTA
From 04-JUL-18 00:59:00 to 04-JUL-18 00:59:00 (CST-6)
Location: GETTYSBURG
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in WALWORTH, SOUTH DAKOTA
From 04-JUL-18 00:59:00 to 04-JUL-18 00:59:00 (CST-6)
Location: GLENHAM
Magnitude: 69.00 MG
Reported by: Mesonet

Thunderstorm Wind in WALWORTH, SOUTH DAKOTA
From 04-JUL-18 01:04:00 to 04-JUL-18 01:04:00 (CST-6)
Location: LOWRY
Magnitude: 56.00 MG
Reported by: Mesonet

Thunderstorm Wind in MCPHERSON, SOUTH DAKOTA
From 04-JUL-18 01:45:00 to 04-JUL-18 01:45:00 (CST-6)
Location: LONG LAKE
Magnitude: 83.00 MG
Reported by: Mesonet

Thunderstorm Wind in BROWN, SOUTH DAKOTA
From 04-JUL-18 02:20:00 to 04-JUL-18 02:20:00 (CST-6)
Location: WINSHIP
Magnitude: 61.00 EG
Reported by: Public

Estimated seventy mph winds downed several large branches.

Thunderstorm Wind in CLARK, SOUTH DAKOTA
From 04-JUL-18 03:28:00 to 04-JUL-18 03:28:00 (CST-6)
Location: CROCKER
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in DEWEY, SOUTH DAKOTA
From 03-JUL-18 23:27:00 to 03-JUL-18 23:27:00 (MST-7)
Location: LA PLANT
Magnitude: 61.00 EG
Reported by: Trained Spotter

Estimated seventy mph winds downed many large tree branches.

Thunderstorm Wind in WALWORTH, SOUTH DAKOTA
From 04-JUL-18 00:55:00 to 04-JUL-18 00:55:00 (CST-6)
Location: (Y26)MOBRIDGE ARPT
Magnitude: 78.00 EG
Crop damage: 0.00K
Reported by: Newspaper

Several campers were overturned along with many boats damaged at the marina as estimated ninety mph winds occurred. There were people in the campers that were rescued with no injuries reported. There was also roof damage to a building near the marina.

Thunderstorm Wind in CORSON, SOUTH DAKOTA
From 04-JUL-18 00:05:00 to 04-JUL-18 00:05:00 (MST-7)
Location: MAHTO
Magnitude: 70.00 EG
Crop damage: 0.00K
Reported by: Public

Numerous trees were downed by estimated eighty mph winds.

Thunderstorm Wind in CAMPBELL, SOUTH DAKOTA
From 04-JUL-18 01:24:00 to 04-JUL-18 01:24:00 (CST-6)
Location: HERREID MUNI ARPT
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: Public

A large tree was downed by an estimated seventy mph wind.

Thunderstorm Wind in MCPHERSON, SOUTH DAKOTA
From 04-JUL-18 01:55:00 to 04-JUL-18 01:55:00 (CST-6)
Location: LONG LAKE
Magnitude: 78.00 EG
Crop damage: 0.00K
Reported by: Public

Estimated ninety mph winds took a third of the roof off a machine shed and damaged a grain bin.

Thunderstorm Wind in CODINGTON, SOUTH DAKOTA
From 04-JUL-18 04:35:00 to 04-JUL-18 04:35:00 (CST-6)
Location: FOLEY
Magnitude: 61.00 EG
Reported by: Public

Estimated seventy mph winds took some shingles off the roof and downed several large tree branches along with laying down some corn stalks.

Thunderstorm Wind in CAMPBELL, SOUTH DAKOTA
From 03-JUL-18 23:50:00 to 03-JUL-18 23:50:00 (CST-6)
Location: ARTAS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Sixty mph winds were estimated.

Thunderstorm Wind in WALWORTH, SOUTH DAKOTA
From 04-JUL-18 00:55:00 to 04-JUL-18 00:55:00 (CST-6)
Location: MOBRIDGE
Magnitude: 78.00 EG
Crop damage: 0.00K
Reported by: Newspaper

Estimated ninety mph winds downed numerous trees and tree branches in Mobridge along with causing some property damage. Some fences and outside furniture were damaged along with several homes and businesses. There were signs blown over, windows blown out, along with several reports of vehicle damage. The electricity was also out on the east side of town for awhile. The cover of a storage building was ripped off along with the roof of a hanger at the airport.

Flash Flood in CORSON, SOUTH DAKOTA
From 04-JUL-18 04:00:00 to 04-JUL-18 10:00:00 (MST-7)
Location: WAKPALA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Very heavy rains caused flash flooding on Oak Creek near Wakpala. Oak creek rose 10 feet in a short period of time reaching 15 feet in the early morning. The creek then crested at 16.34 feet in the mid morning hours to just over major flood stage. Oak Creek then fell slowly into the afternoon and evening hours to below flood stage. Some agricultural land and roads were flooded.

Thunderstorm Wind in MCPHERSON, SOUTH DAKOTA
From 04-JUL-18 01:45:00 to 04-JUL-18 01:45:00 (CST-6)
Location: MADRA
Magnitude: 78.00 EG
Crop damage: 0.00K
Reported by: Public

Estimated ninety mph winds toppled several trees, downed a power line, and moved a semi.

Thunderstorm Wind in MCPHERSON, SOUTH DAKOTA
From 04-JUL-18 01:45:00 to 04-JUL-18 01:45:00 (CST-6)
Location: EUREKA MUNI ARPT
Magnitude: 78.00 EG
Crop damage: 0.00K
Reported by: Public

Estimated ninety mph winds ripped small pieces of siding off the house and uprooted trees.

Thunderstorm Wind in DEWEY, SOUTH DAKOTA
From 03-JUL-18 23:04:00 to 03-JUL-18 23:04:00 (MST-7)
Location: EAGLE BUTTE
Magnitude: 78.00 EG
Reported by: Emergency Manager

Estimated ninety mph winds destroyed an empty trailer along with tipping another one over. A delivery truck was also tipped over and a mobile home was destroyed. A couple buildings had parts of their roofs blown off with many trees damaged or uprooted. Some power lines were also downed.