An active day of severe weather across central and eastern TX and OK Panhandles. An upper low analyzed near Las Vegas, NV in the morning opened as it bottoms out over srn NM in the afternoon before lifting and deepening again as it ejected over the Panhandles later that evening. Dryline slowly mixed east early afternoon on the 16th and with the more significant synoptic forcing hanging back and fairly meridional flow aloft. Mid to upper 60s dewpts were present over the eastern half of the Panhandles and with the exception of the very western edge of the deep sfc moisture, these dewpts did not mix out much through the day. Some standards parameters across the eastern Panhandles in particular included 400-600 m^2/s^2 Helicity with 3000-4000 J/kg of SBCAPE. This environment lead to numerous very large hail reports and several tornadoes, with one or two being long tracked over several miles.

Tornado in BEAVER, OKLAHOMA
From 16-MAY-17 13:45:00 to 16-MAY-17 13:46:00 (CST-6)
Location: BALKO
Tornado F-scale: EF0
Reported by: Storm Chaser

Report of tornado on the ground 1 mile south and 2 miles west of Balko. Brief touchdown. Less than a  minute.

Hail in BEAVER, OKLAHOMA
From 16-MAY-17 14:00:00 to 16-MAY-17 14:00:00 (CST-6)
Location: BRYANS CORNER
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BEAVER, OKLAHOMA
From 16-MAY-17 14:02:00 to 16-MAY-17 14:02:00 (CST-6)
Location: BEAVER
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hen egg size hail reported.

Hail in BEAVER, OKLAHOMA
From 16-MAY-17 14:13:00 to 16-MAY-17 14:13:00 (CST-6)
Location: FORGAN
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in BEAVER, OKLAHOMA
From 16-MAY-17 14:15:00 to 16-MAY-17 14:15:00 (CST-6)
Location: FORGAN
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in BEAVER, OKLAHOMA
From 16-MAY-17 14:20:00 to 16-MAY-17 14:20:00 (CST-6)
Location: FORGAN
Magnitude: 3.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Late report. Found one very large hail stone measured at 3.5 inches.

Hail in TEXAS, OKLAHOMA
From 16-MAY-17 14:32:00 to 16-MAY-17 14:32:00 (CST-6)
Location: ADAMS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in BEAVER, OKLAHOMA
From 16-MAY-17 14:51:00 to 16-MAY-17 14:51:00 (CST-6)
Location: BRYANS CORNER
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in BEAVER, OKLAHOMA
From 16-MAY-17 15:45:00 to 16-MAY-17 15:45:00 (CST-6)
Location: FORGAN
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Late report. Mostly quarter size hail with a few as large as ping pong ball size.

Hail in BEAVER, OKLAHOMA
From 16-MAY-17 16:15:00 to 16-MAY-17 16:15:00 (CST-6)
Location: TURPIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Late report. Radar estimated time of occurrence.  45-50 mph winds.

Hail in BEAVER, OKLAHOMA
From 16-MAY-17 13:30:00 to 16-MAY-17 13:30:00 (CST-6)
Location: BRYANS CORNER
Magnitude: 1.75 
Reported by: Trained Spotter

Late report. Estimated at least golf ball size hail based on damage to trees, dents in cars, and house  damage.

Hail in BEAVER, OKLAHOMA
From 16-MAY-17 13:30:00 to 16-MAY-17 13:30:00 (CST-6)
Location: BRYANS CORNER
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ping pong to Tennis ball size hail.