Isolated supercells developed in eastern New Mexico along a dryline during the middle afternoon hours of the 25th. The supercells intensified as they moved into the southwestern Texas Panhandle and western South Plains in association with an upper level shortwave trough translating over New Mexico. Very large hail was reported with the initial supercells in the Panhandle, along with reports of funnel clouds. By early in the evening, much of the convection had dissipated, but a single supercell evolved and tracked across Parmer and Castro Counties. The supercell morphed into a classic tornadic supercell before it eventually dissipated in northeastern Castro County. Severe hail was reported with the storm and several brief and weak tornadoes were observed near Dimmitt.
Several thunderstorms additionally developed across the western South Plains during the early morning hours of the 26th. However, only small hail was reported with this cluster of thunderstorms.

Hail in BAILEY, TEXAS
From 25-MAY-10 14:51:00 to 25-MAY-10 14:53:00 (CST-6)
Location: PROGRESS
Magnitude: 3.75 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained weather spotters reported very large hail of 3.75 inches in rural Bailey County.  Minor damage was reported to vehicles along U.S. Highway 84.

Hail in PARMER, TEXAS
From 25-MAY-10 15:49:00 to 25-MAY-10 16:07:00 (CST-6)
Location: BOVINA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Bovina police department reported golf ball size hail south and east of Bovina.

Hail in PARMER, TEXAS
From 25-MAY-10 16:31:00 to 25-MAY-10 16:38:00 (CST-6)
Location: BOVINA
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in PARMER, TEXAS
From 25-MAY-10 16:41:00 to 25-MAY-10 16:41:00 (CST-6)
Location: BOVINA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A trained weather spotter reported quarter size hail northeast of Bovina.

Hail in CASTRO, TEXAS
From 25-MAY-10 17:39:00 to 25-MAY-10 18:00:00 (CST-6)
Location: DIMMITT
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained weather spotter reported golf ball size hail in rural portions of Castro County.

Hail in CASTRO, TEXAS
From 25-MAY-10 18:50:00 to 25-MAY-10 18:50:00 (CST-6)
Location: DIMMITT
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained weather spotters reported golf ball size hail in Dimmitt.

Hail in LAMB, TEXAS
From 25-MAY-10 23:09:00 to 25-MAY-10 23:09:00 (CST-6)
Location: LITTLEFIELD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in TERRY, TEXAS
From 26-MAY-10 02:41:00 to 26-MAY-10 02:41:00 (CST-6)
Location: BROWNFIELD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Tornado in CASTRO, TEXAS
From 25-MAY-10 18:52:00 to 25-MAY-10 18:53:00 (CST-6)
Location: DIMMITT
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Skywarn storm spotters and numerous storm chasers photographed a tornado just west of Dimmitt shortly after 18:50 CST.  The tornado was brief and remained over open fields.  The tornado appeared as a slender condensation tube that stretched to the ground. No damage was reported.

Hail in PARMER, TEXAS
From 25-MAY-10 14:30:00 to 25-MAY-10 14:45:00 (CST-6)
Location: BOVINA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement in Parmer County reported quarter size to golfball size hail along U.S. Highway 60 from four miles east of Bovina to Friona.

Hail in BAILEY, TEXAS
From 25-MAY-10 14:43:00 to 25-MAY-10 14:53:00 (CST-6)
Location: PROGRESS
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

A storm chaser reported half dollar size hail along U.S. Highway 84 in Bailey County.  By 14:51 CST, the hail was intermittently mixed with very large 3.75 inch hail stones. No significant damages were reported.

Tornado in CASTRO, TEXAS
From 25-MAY-10 19:11:00 to 25-MAY-10 19:11:00 (CST-6)
Location: DIMMITT
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm spotters observed the first of two brief dusty tornadoes that developed under a deeply occluded bowl-shaped lowering northeast of Dimmitt at 19:11 CST.  These spin-ups occurred over open range land and no damages were reported.

Tornado in CASTRO, TEXAS
From 25-MAY-10 19:14:00 to 25-MAY-10 19:14:00 (CST-6)
Location: DIMMITT
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm spotters observed the second of two brief dusty tornadoes that developed under a deeply occluded bowl-shaped lowering northeast of Dimmitt at 19:14 CST.  These spin-ups occurred over open range land and no damages were reported.

Hail in PARMER, TEXAS
From 25-MAY-10 14:55:00 to 25-MAY-10 14:55:00 (CST-6)
Location: LARIAT
Magnitude: 2.00 
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

The public reported large hail to the size of 2 inches which destroyed a car windshield.