Evening storms developed across western and south central South Dakota before expanding north and east through the course of the night, either as individual cells or as small clusters. Hail and wind damage was isolated but spread across the area. The bowing segment of a thunderstorm produced an estimated 70 mph wind gust west of Trail City, which knocked down a Cottonwood tree. One of the stronger clusters also generated hail up to the size of golf balls north of Oacoma, while another cluster moved into far eastern South Dakota and produce hail to half dollar size in Lake Poinsett later that morning.

Thunderstorm Wind in CORSON, SOUTH DAKOTA
From 12-MAY-22 02:02:00 to 12-MAY-22 02:02:00 (MST-7)
Location: TRAIL CITY
Magnitude: 61.00 EG
Reported by: Fire Department/Rescue

A fire department employee estimated 70 mph wind gusts, which downed a nearby large cottonwood tree.

Hail in HAMLIN, SOUTH DAKOTA
From 12-MAY-22 03:10:00 to 12-MAY-22 03:10:00 (CST-6)
Location: ESTELLINE MUNI ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in HAMLIN, SOUTH DAKOTA
From 12-MAY-22 03:56:00 to 12-MAY-22 03:56:00 (CST-6)
Location: DEMPSTER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LYMAN, SOUTH DAKOTA
From 12-MAY-22 00:00:00 to 12-MAY-22 00:00:00 (CST-6)
Location: OACOMA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LYMAN, SOUTH DAKOTA
From 12-MAY-22 00:13:00 to 12-MAY-22 00:13:00 (CST-6)
Location: RELIANCE ARPT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in HAMLIN, SOUTH DAKOTA
From 12-MAY-22 02:55:00 to 12-MAY-22 02:55:00 (CST-6)
Location: STONE BRIDGE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DEWEY, SOUTH DAKOTA
From 12-MAY-22 02:39:00 to 12-MAY-22 02:39:00 (MST-7)
Location: LANTRY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LYMAN, SOUTH DAKOTA
From 11-MAY-22 23:35:00 to 11-MAY-22 23:35:00 (CST-6)
Location: OACOMA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LYMAN, SOUTH DAKOTA
From 11-MAY-22 20:45:00 to 11-MAY-22 20:45:00 (CST-6)
Location: RELIANCE ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LYMAN, SOUTH DAKOTA
From 11-MAY-22 22:45:00 to 11-MAY-22 22:45:00 (CST-6)
Location: RELIANCE ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CLARK, SOUTH DAKOTA
From 12-MAY-22 04:22:00 to 12-MAY-22 04:22:00 (CST-6)
Location: WILLOW LAKE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in CAMPBELL, SOUTH DAKOTA
From 12-MAY-22 03:43:00 to 12-MAY-22 03:43:00 (CST-6)
Location: POLLOCK
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in DEWEY, SOUTH DAKOTA
From 12-MAY-22 01:50:00 to 12-MAY-22 01:50:00 (MST-7)
Location: TIMBER LAKE ARPT
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in EDMUNDS, SOUTH DAKOTA
From 12-MAY-22 04:35:00 to 12-MAY-22 04:35:00 (CST-6)
Location: BOWDLE
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet