A rather tame upper level pattern with mid and low level key features helped to develop this severe weather event. Weak upper level high center was moving east across southern New Mexico during the day on the 12th. A weak disturbance did set up across the Panhandles the evening of the 12th. In the lower levels, high low level moisture was in place with moderate to strong south to southeasterly surface winds. A surface boundary also set up from southwest to northeast across the Panhandles along with an outflow boundary moving west from western Oklahoma. These boundary set ups provided good shear with the already high instability across the region. As a result in the afternoon hours, slow moving supercells were developing across parts of the central and eastern Texas Panhandles. One storm near Panhandle, TX did produce a brief tornado. More thunderstorms would fire into the evening hours across portions of the western Texas Panhandle as the main boundary moved westward. A second complex of thunderstorms developed across portions of the eastern OK Panhandle in association with a complex of storms developing just to the east of Beaver County, OK. These storms also produced large hail. Starting later in the afternoon and continuing into the evening and early morning hours on the 13th was the  flash flooding threat that was ongoing with PWAT values in the atmosphere over one inch and some slow moving thunderstorms where flooding was reported.

Hail in GRAY, TEXAS
From 12-JUN-18 14:55:00 to 12-JUN-18 14:55:00 (CST-6)
Location: KINGS MILL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Dime to quarter size hail, and lots of rain.

Hail in ROBERTS, TEXAS
From 12-JUN-18 15:06:00 to 12-JUN-18 15:06:00 (CST-6)
Location: MIAMI
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ROBERTS, TEXAS
From 12-JUN-18 15:13:00 to 12-JUN-18 15:13:00 (CST-6)
Location: MIAMI
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ROBERTS, TEXAS
From 12-JUN-18 15:14:00 to 12-JUN-18 15:14:00 (CST-6)
Location: MIAMI
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ROBERTS, TEXAS
From 12-JUN-18 15:18:00 to 12-JUN-18 15:18:00 (CST-6)
Location: MIAMI
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CARSON, TEXAS
From 12-JUN-18 16:12:00 to 12-JUN-18 16:12:00 (CST-6)
Location: PANHANDLE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CARSON, TEXAS
From 12-JUN-18 16:27:00 to 12-JUN-18 16:27:00 (CST-6)
Location: PANHANDLE
Magnitude: 2.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in CARSON, TEXAS
From 12-JUN-18 17:00:00 to 12-JUN-18 17:00:00 (CST-6)
Location: PANHANDLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in CARSON, TEXAS
From 12-JUN-18 17:03:00 to 12-JUN-18 17:03:00 (CST-6)
Location: PANHANDLE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in CARSON, TEXAS
From 12-JUN-18 17:17:00 to 12-JUN-18 17:17:00 (CST-6)
Location: PANHANDLE
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Reports of hen egg to tennis ball size hail in Panhandle.

Hail in CARSON, TEXAS
From 12-JUN-18 17:38:00 to 12-JUN-18 17:38:00 (CST-6)
Location: PANHANDLE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in CARSON, TEXAS
From 12-JUN-18 17:38:00 to 12-JUN-18 17:38:00 (CST-6)
Location: PANHANDLE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CARSON, TEXAS
From 12-JUN-18 18:00:00 to 12-JUN-18 18:00:00 (CST-6)
Location: PANHANDLE
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in HUTCHINSON, TEXAS
From 12-JUN-18 18:36:00 to 12-JUN-18 18:36:00 (CST-6)
Location: SANFORD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Farm to market road 1319.

Hail in CARSON, TEXAS
From 12-JUN-18 18:38:00 to 12-JUN-18 18:38:00 (CST-6)
Location: CONWAY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

At 207 and interstate 40.

Hail in POTTER, TEXAS
From 12-JUN-18 23:05:00 to 12-JUN-18 23:05:00 (CST-6)
Location: (AMA)AMARILLO INTL A
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in RANDALL, TEXAS
From 12-JUN-18 23:06:00 to 12-JUN-18 23:06:00 (CST-6)
Location: AMARILLO
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in RANDALL, TEXAS
From 12-JUN-18 23:13:00 to 12-JUN-18 23:13:00 (CST-6)
Location: AMARILLO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Twitter report of nickel to quarter sized hail at interstate 27 and western street.

Hail in RANDALL, TEXAS
From 12-JUN-18 23:15:00 to 12-JUN-18 23:15:00 (CST-6)
Location: LAKE TANGLEWOOD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in POTTER, TEXAS
From 12-JUN-18 23:18:00 to 12-JUN-18 23:18:00 (CST-6)
Location: AMARILLO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in CARSON, TEXAS
From 12-JUN-18 18:15:00 to 12-JUN-18 19:15:00 (CST-6)
Location: PANHANDLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Significant flooding in and around Panhandle. Broadway from 1st to Elsie is impassible.  207 from 5th to the high school is impassible.  One to two feet of water over the roadways.

Thunderstorm Wind in HARTLEY, TEXAS
From 12-JUN-18 20:18:00 to 12-JUN-18 20:18:00 (CST-6)
Location: (DHT)DALHART MUNI AR
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in MOORE, TEXAS
From 12-JUN-18 21:07:00 to 12-JUN-18 21:07:00 (CST-6)
Location: DUMAS MUNI ARPT
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in ARMSTRONG, TEXAS
From 12-JUN-18 21:42:00 to 12-JUN-18 21:42:00 (CST-6)
Location: GOODNIGHT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in RANDALL, TEXAS
From 12-JUN-18 23:02:00 to 12-JUN-18 23:02:00 (CST-6)
Location: UMBARGER
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in HEMPHILL, TEXAS
From 12-JUN-18 23:29:00 to 12-JUN-18 23:29:00 (CST-6)
Location: CANADIAN
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in HEMPHILL, TEXAS
From 12-JUN-18 23:38:00 to 12-JUN-18 23:38:00 (CST-6)
Location: CANADIAN
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Tornado in CARSON, TEXAS
From 12-JUN-18 17:46:00 to 12-JUN-18 17:46:00 (CST-6)
Location: PANHANDLE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Brief landspout on ground a minute or less, reported by multiple chasers in the area.