A powerful upper level low lifted across the central and northern Rockies on May 23rd into May 24th. Thunderstorms developed across eastern Wyoming during the afternoon of May 23rd along a surface trough of low pressure. As the storms tracked east, they became severe with large hail and damaging wind gusts. Hail up to the size of baseballs and thunderstorm wind gusts to 60 MPH were reported.

Thunderstorm Wind in CHERRY, NEBRASKA
From 23-MAY-21 19:42:00 to 23-MAY-21 19:42:00 (CST-6)
Location: KILGORE
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cooperative observer reported damage to their equipment and an outbuilding blown over. Time estimated by radar.

Hail in GARDEN, NEBRASKA
From 23-MAY-21 16:21:00 to 23-MAY-21 16:21:00 (MST-7)
Location: OSHKOSH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Pea to quarter sized hail reported in Oshkosh.

Hail in GARDEN, NEBRASKA
From 23-MAY-21 16:27:00 to 23-MAY-21 16:27:00 (MST-7)
Location: OSHKOSH
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Golf ball, goose egg and baseball sized hail reported at this location.

Hail in GARDEN, NEBRASKA
From 23-MAY-21 16:53:00 to 23-MAY-21 16:53:00 (MST-7)
Location: OSHKOSH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GARDEN, NEBRASKA
From 23-MAY-21 17:02:00 to 23-MAY-21 17:02:00 (MST-7)
Location: OSHKOSH
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CHERRY, NEBRASKA
From 23-MAY-21 18:26:00 to 23-MAY-21 18:26:00 (CST-6)
Location: IRWIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in PERKINS, NEBRASKA
From 23-MAY-21 18:25:00 to 23-MAY-21 18:25:00 (MST-7)
Location: VENANGO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Quarter sized hail and high winds were reported at this location.

Thunderstorm Wind in ARTHUR, NEBRASKA
From 23-MAY-21 17:43:00 to 23-MAY-21 17:43:00 (MST-7)
Location: ARTHUR
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm wind gust estimated at 60 mph, reported at this location.

Thunderstorm Wind in CHERRY, NEBRASKA
From 23-MAY-21 19:13:00 to 23-MAY-21 19:13:00 (CST-6)
Location: ELI
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm wind gust of 60 mph reported at this location.

Thunderstorm Wind in CHERRY, NEBRASKA
From 23-MAY-21 20:06:00 to 23-MAY-21 20:06:00 (CST-6)
Location: VALENTINE
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A thunderstorm wind gust of 59 mph reported at the Valentine Airport.

Thunderstorm Wind in CHERRY, NEBRASKA
From 23-MAY-21 20:00:00 to 23-MAY-21 20:00:00 (CST-6)
Location: BROWNLEE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported thunderstorm winds of 60 mph at this location.

Thunderstorm Wind in CUSTER, NEBRASKA
From 23-MAY-21 22:15:00 to 23-MAY-21 22:15:00 (CST-6)
Location: CALLAWAY
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: COOP Observer

A 10 foot diameter grain bin was blown over at the grain elevator in Callaway. Time estimated from radar.