In the afternoon of the 25th, slow moving, high precipitation thunderstorms formed in eastern Colorado and moved northeast. In the evening, severe hail was reported along with heavy rain. Overnight on the 25th, the storms slowed, began to back-build, and cause flooding in southwest Nebraska. Flooding continued until the 28th but the damage it caused took even longer to repair. 6.5 to 9.5 inches of rain was reported across Dundy, Hitchcock and Red Willow counties.

Flash Flood in DUNDY, NEBRASKA
From 26-MAY-23 00:00:00 to 26-MAY-23 08:00:00 (MST-7)
Location: BENKELMAN
Flood cause: Heavy Rain
Property damage: 30.00K
Crop damage: 30.00K
Reported by: Emergency Manager

Emergency manager reported Highway 34 and 61 were both closed due to flash flooding. Highway 34 was closed from Benkelman to Trenton while highway 61 was closed from Benkelman to Enders. Up to 8 feet of water over the road was reported by Fire and Rescue. At least one car and driver were stranded in the water and a secondary road was completely washed out. The eastern portion of Dundy county remained largely under water for the following days.

Flood in DUNDY, NEBRASKA
From 26-MAY-23 08:01:00 to 28-MAY-23 19:00:00 (MST-7)
Location: BENKELMAN
Flood cause: Heavy Rain
Property damage: 30.00K
Crop damage: 30.00K
Reported by: Law Enforcement

Highway 61 remained closed until at least the evening of the 28th when water was still 3 or more feet deep over the road between Benkelman and Enders. Highway 34 between Benkelman and Trenton also remained closed due to flood waters of an unknown depth. Of the parts of the highways and other county road that were starting to be above water on the 28th, washouts and other damage were reported.

Hail in DUNDY, NEBRASKA
From 25-MAY-23 19:05:00 to 25-MAY-23 19:05:00 (MST-7)
Location: PARKS
Magnitude: 1.00 
Reported by: Public

Caller estimated hail mainly from pea to penny in size. They said that there were a few larger stones around a quarter in size.

Flash Flood in HITCHCOCK, NEBRASKA
From 26-MAY-23 03:00:00 to 26-MAY-23 12:00:00 (CST-6)
Location: MAX
Flood cause: Heavy Rain
Property damage: 202.00K
Crop damage: 50.00K
Reported by: Emergency Manager

In around around Stratton, at least one home and multiple cars were being swept away from flash flooding. Water rescues were required to save at least 4 citizens inside their homes. The town of Palisade also had extensive flooding but to less of an extent than Stratton. Highway 34 from Benkelman to Trenton was closed due to flooding. Highway 25 from Trenton to highway 6 was also closed.  The first report of flash flooding was when a driver became stranded near Palisade and needed rescue.

Flood in HITCHCOCK, NEBRASKA
From 26-MAY-23 12:01:00 to 28-MAY-23 16:00:00 (CST-6)
Location: STRATTON
Flood cause: Heavy Rain
Property damage: 740.00K
Crop damage: 50.00K
Reported by: Emergency Manager

Highway 34 from Benkelman to Trenton was closed due to flooding. Highway 25 from Trenton to highway 6 was also closed. The train bridge west of Stratton was washed out due to the flooding. A road grader was also found to be almost fully submerged.

Flood in HITCHCOCK, NEBRASKA
From 26-MAY-23 12:01:00 to 28-MAY-23 21:30:00 (CST-6)
Location: CULBERTSON
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 1.00K
Reported by: Emergency Manager

The Frenchman creek was reported to be out of its bank and flooding county multiple roads, although it seemingly never flooded over highway 6.

Flood in RED WILLOW, NEBRASKA
From 26-MAY-23 12:00:00 to 28-MAY-23 17:00:00 (CST-6)
Location: (MCK)MC COOK ARPT
Flood cause: Heavy Rain
Property damage: 3.50K
Crop damage: 1.00K
Reported by: Emergency Manager

Barnett Park in McCook flooded due to the Republican River rising out of its banks. It remained flooded until the afternoon of the 28th. Highway 34 and 83 both had to be closed due to the river flooding over them.