A large cutoff upper low meandered across the western U.S. To the east, across the Southern Plains, a weak surface trough aided afternoon thunderstorm development, first over the Texas and Oklahoma Panhandles, where surface heating was more intense. More isolated activity developed in the warm sector across western Oklahoma, persisting into the evening hours. At least one tornado was observed near Sayre, with no significant damage. Elsewhere, large hail and damaging winds were reported.

Hail in ROGER MILLS, OKLAHOMA
From 16-APR-15 18:18:00 to 16-APR-15 18:18:00 (CST-6)
Location: DURHAM
Magnitude: 1.25 
Reported by: Storm Chaser

No known damage.

Hail in ROGER MILLS, OKLAHOMA
From 16-APR-15 17:52:00 to 16-APR-15 17:52:00 (CST-6)
Location: REYDON
Magnitude: 2.00 
Reported by: Trained Spotter

No known damage.

Hail in ROGER MILLS, OKLAHOMA
From 16-APR-15 18:36:00 to 16-APR-15 18:36:00 (CST-6)
Location: CRAWFORD
Magnitude: 2.50 
Reported by: Storm Chaser

No known damage.

Hail in BECKHAM, OKLAHOMA
From 16-APR-15 18:55:00 to 16-APR-15 18:55:00 (CST-6)
Location: DELHI
Magnitude: 1.75 
Reported by: Storm Chaser

No known damage.

Hail in ROGER MILLS, OKLAHOMA
From 16-APR-15 20:32:00 to 16-APR-15 20:32:00 (CST-6)
Location: SWEETWATER
Magnitude: 1.00 
Reported by: Public

No known damage.

Thunderstorm Wind in BECKHAM, OKLAHOMA
From 16-APR-15 18:58:00 to 16-APR-15 18:58:00 (CST-6)
Location: DELHI
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A pivot irrigation system was damaged by thunderstorm winds.

Hail in ROGER MILLS, OKLAHOMA
From 16-APR-15 21:35:00 to 16-APR-15 21:35:00 (CST-6)
Location: CHEYENNE
Magnitude: 1.00 
Reported by: Storm Chaser

No known damage.

Hail in ROGER MILLS, OKLAHOMA
From 16-APR-15 21:29:00 to 16-APR-15 21:29:00 (CST-6)
Location: CHEYENNE
Magnitude: 1.25 
Reported by: Trained Spotter

No known damage.

Thunderstorm Wind in ROGER MILLS, OKLAHOMA
From 16-APR-15 18:25:00 to 16-APR-15 18:25:00 (CST-6)
Location: DURHAM
Magnitude: 53.00 EG
Reported by: Storm Chaser

No known damage.

Thunderstorm Wind in ROGER MILLS, OKLAHOMA
From 16-APR-15 21:11:00 to 16-APR-15 21:11:00 (CST-6)
Location: CHEYENNE
Magnitude: 53.00 EG
Reported by: Storm Chaser

No known damage.

Tornado in BECKHAM, OKLAHOMA
From 16-APR-15 19:00:00 to 16-APR-15 19:15:00 (CST-6)
Location: DELHI
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Numerous storm chasers observed a tornado that developed about 5 miles east of Erick. The tornado moved northeast and crossed Interstate 40 at the Hext Road interchange. The tornado then curved northwest and dissipated 8 miles west-southwest of Sayre. Some trees were damaged, but no structural damage was found.

Hail in TILLMAN, OKLAHOMA
From 16-APR-15 15:40:00 to 16-APR-15 15:40:00 (CST-6)
Location: FREDERICK
Magnitude: 1.00 
Reported by: Broadcast Media

Relayed by kswo.  No known damage.

Hail in TILLMAN, OKLAHOMA
From 16-APR-15 15:55:00 to 16-APR-15 15:55:00 (CST-6)
Location: MANITOU
Magnitude: 1.00 
Reported by: Amateur Radio

No known damage.

Hail in TILLMAN, OKLAHOMA
From 16-APR-15 16:00:00 to 16-APR-15 16:00:00 (CST-6)
Location: MANITOU
Magnitude: 1.00 
Reported by: Broadcast Media

Relayed by kswo.  No known damage.

Hail in TILLMAN, OKLAHOMA
From 16-APR-15 15:30:00 to 16-APR-15 15:30:00 (CST-6)
Location: FREDERICK
Magnitude: 1.75 
Reported by: Public

No known damage.