Thunderstorms developed during the afternoon ahead of a dry line that was located near the Texas panhandle and Oklahoma border. The thunderstorms quickly became supercells as they moved toward southwest Kansas. Very large hail was the initial threat, although a significant tornado threat became apparent as they neared the Kansas border. Three tornadoes were reported with the thunderstorms, with two of them doing significant damage. The tornadic thunderstorms moved northeast by nightfall, with other less severe thunderstorms developing farther south. Monetary damages were estimated.

Hail in HARPER, OKLAHOMA
From 23-MAY-08 18:00:00 to 23-MAY-08 18:00:00 (CST-6)
Location: LAVERNE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in ELLIS, OKLAHOMA
From 23-MAY-08 18:15:00 to 23-MAY-08 18:15:00 (CST-6)
Location: SHATTUCK
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in HARPER, OKLAHOMA
From 23-MAY-08 19:03:00 to 23-MAY-08 19:03:00 (CST-6)
Location: SELMAN
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

The hail was reported seven miles south of the junction of Highways 34 and 64.

Hail in HARPER, OKLAHOMA
From 23-MAY-08 19:15:00 to 23-MAY-08 19:15:00 (CST-6)
Location: LAVERNE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in WOODWARD, OKLAHOMA
From 23-MAY-08 23:40:00 to 23-MAY-08 23:40:00 (CST-6)
Location: SHARON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The hail was reported near the Woodward and Dewey county line.

Tornado in HARPER, OKLAHOMA
From 23-MAY-08 19:03:00 to 23-MAY-08 19:15:00 (CST-6)
Location: SELMAN
Tornado F-scale: EF3
Crop damage: 0.00K
Reported by: NWS Storm Survey

A strong tornado, rated EF3 at its peak intensity, struck south-southwest of the Selman area, producing widespread damage along its path. The tornado touched down, doing minor damage to trees and outbuildings. The tornado continued moving northeast and struck a residence. Significant damage consistent with EF2 damage was seen at this location. More significant damage was done to a residence and stocked workshop building as the tornado moved northeast. This was the strongest point of the tornado, rated EF3. A semi-cab and a 20-horse trailer were blown 50 yards from inside of the workshop. They both sustained significant damage. The tornado moved north from this point, doing EF2 damage to a building and workshop. The owners of the home took shelter in their storm shelter during the tornado, but became trapped inside by debris over top of the door. They were freed by local firemen after approximately 45 minutes. The tornado continued north and then northwest as it began to dissipate. Before it dissipated, however, a heavy fiberglass water tank that was filled with water was destroyed and moved some distance away. Two horses were also killed and one was seriously injured by swirling tin and other sharp debris. Monetary damages were estimated.

Hail in ELLIS, OKLAHOMA
From 23-MAY-08 22:27:00 to 23-MAY-08 22:27:00 (CST-6)
Location: SHATTUCK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in ELLIS, OKLAHOMA
From 23-MAY-08 22:35:00 to 23-MAY-08 22:35:00 (CST-6)
Location: ARNETT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in ELLIS, OKLAHOMA
From 23-MAY-08 22:35:00 to 23-MAY-08 22:35:00 (CST-6)
Location: ARNETT
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in ELLIS, OKLAHOMA
From 23-MAY-08 22:45:00 to 23-MAY-08 22:45:00 (CST-6)
Location: ARNETT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in WOODWARD, OKLAHOMA
From 23-MAY-08 23:12:00 to 23-MAY-08 23:12:00 (CST-6)
Location: WOODWARD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in HARPER, OKLAHOMA
From 23-MAY-08 19:58:00 to 23-MAY-08 20:04:00 (CST-6)
Location: BUFFALO
Tornado F-scale: EF0
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado produced some minor tree damage, shingle damage to a home and some tin scattered about. The tornado continued to move north-northeast and crossed the state line into Clark County Kansas. Monetary damages were estimated.

Hail in ELLIS, OKLAHOMA
From 23-MAY-08 17:50:00 to 23-MAY-08 17:50:00 (CST-6)
Location: SHATTUCK
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Nickel to golf ball size hail was reported.

Hail in HARPER, OKLAHOMA
From 23-MAY-08 17:55:00 to 23-MAY-08 17:55:00 (CST-6)
Location: LAVERNE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in WOODS, OKLAHOMA
From 23-MAY-08 19:59:00 to 23-MAY-08 20:08:00 (CST-6)
Location: CAMP HOUSTON
Tornado F-scale: EF2
Property damage: 20.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado developed and moved predominately over range land. Little or no significant damage was observed until the tornado approached the state line. Widespread tree damage, consistent with an EF2 tornado was noted.  The tornado then moved into Comanche County Kansas. Monetary damages were estimated.

Hail in HARPER, OKLAHOMA
From 23-MAY-08 21:08:00 to 23-MAY-08 21:08:00 (CST-6)
Location: LAVERNE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer