During the afternoon of the 18th, quite a bit of moisture and unstable air was present across the combined Oklahoma and Texas Panhandle. During the heat of the day several supercell thunderstorms created large hail, up to 2.5 in diameter, heavy rain, and damaging wind gusts. One of the supercells even produced a short lived tornado. Continued storm activity into the overnight hours from the help of an upper level system continued to feed the overall rain amounts leading to widespread flooding problems across the area.

Hail in OLDHAM, TEXAS
From 18-MAY-23 15:53:00 to 18-MAY-23 15:53:00 (CST-6)
Location: BOYS RANCH
Magnitude: 1.00 
Reported by: Public

Hail in DALLAM, TEXAS
From 18-MAY-23 17:04:00 to 18-MAY-23 17:04:00 (CST-6)
Location: CONLEN
Magnitude: 1.75 
Reported by: Law Enforcement

Hail in DALLAM, TEXAS
From 18-MAY-23 17:33:00 to 18-MAY-23 17:33:00 (CST-6)
Location: CONLEN
Magnitude: 1.50 
Property damage: 1.00K
Reported by: Public

Wind driven hail caused extensive damage to  house and trees. All windows on north side  of house were blown out.

Hail in POTTER, TEXAS
From 18-MAY-23 17:50:00 to 18-MAY-23 17:50:00 (CST-6)
Location: AMARILLO
Magnitude: 2.50 
Reported by: Trained Spotter

Hail in POTTER, TEXAS
From 18-MAY-23 18:59:00 to 18-MAY-23 18:59:00 (CST-6)
Location: (AMA)AMARILLO INTL A
Magnitude: 1.75 
Reported by: Public

Hail in POTTER, TEXAS
From 18-MAY-23 19:10:00 to 18-MAY-23 19:10:00 (CST-6)
Location: (AMA)AMARILLO INTL A
Magnitude: 1.00 
Reported by: Storm Chaser

Hail in CARSON, TEXAS
From 18-MAY-23 19:42:00 to 18-MAY-23 19:42:00 (CST-6)
Location: PANTEX
Magnitude: 2.00 
Reported by: Trained Spotter

Hail in CARSON, TEXAS
From 18-MAY-23 20:14:00 to 18-MAY-23 20:14:00 (CST-6)
Location: PANHANDLE
Magnitude: 2.00 
Reported by: Storm Chaser

Thunderstorm Wind in RANDALL, TEXAS
From 18-MAY-23 20:22:00 to 18-MAY-23 20:22:00 (CST-6)
Location: CANYON
Magnitude: 50.00 MG
Reported by: Mesonet

Thunderstorm Wind in CARSON, TEXAS
From 18-MAY-23 20:55:00 to 18-MAY-23 20:55:00 (CST-6)
Location: MC BRIDE
Magnitude: 52.00 MG
Reported by: Storm Chaser

Storm chaser measured the wind gust with his anemometer.

Hail in CARSON, TEXAS
From 18-MAY-23 20:55:00 to 18-MAY-23 20:55:00 (CST-6)
Location: MC BRIDE
Magnitude: 1.00 
Reported by: Storm Chaser

Thunderstorm Wind in CARSON, TEXAS
From 18-MAY-23 22:00:00 to 18-MAY-23 22:00:00 (CST-6)
Location: WHITE DEER
Magnitude: 50.00 MG
Reported by: Storm Chaser

This wind gusts was measured by a storm chaser with an anemometer.

Thunderstorm Wind in CARSON, TEXAS
From 18-MAY-23 21:45:00 to 18-MAY-23 21:45:00 (CST-6)
Location: WHITE DEER
Magnitude: 50.00 MG
Reported by: Storm Chaser

Storm chaser measured with an anemometer.

Thunderstorm Wind in MOORE, TEXAS
From 18-MAY-23 18:28:00 to 18-MAY-23 18:28:00 (CST-6)
Location: CACTUS
Magnitude: 74.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A metal roof was blown off one of the  apartment buildings at the Cactus JBS apartments.

Thunderstorm Wind in RANDALL, TEXAS
From 18-MAY-23 20:18:00 to 18-MAY-23 20:18:00 (CST-6)
Location: CANYON
Magnitude: 74.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Carport was destroyed alongside various roof  shingles blown off and a wooden fence was broken by thunderstorm wind gust.

Flash Flood in MOORE, TEXAS
From 18-MAY-23 20:00:00 to 18-MAY-23 21:00:00 (CST-6)
Location: CACTUS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Torrential rainfall rates of 3 to 5 inches  per hour resulted in major street flooding  throughout town. Vehicles were stranded with  several water rescues being conducted. Some streets had fast  flowing water over a foot deep covering the  street.

Flash Flood in RANDALL, TEXAS
From 18-MAY-23 21:15:00 to 18-MAY-23 22:15:00 (CST-6)
Location: AMARILLO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Coulter was closed at the north and south lanes at the intersection of 45th Avenue. Multiple water rescues were being conducted.

Flash Flood in RANDALL, TEXAS
From 18-MAY-23 21:32:00 to 18-MAY-23 22:32:00 (CST-6)
Location: CANYON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Water was reported to be across the road at the Canyon exit of I-27. A car had spun out and ended up in a ditch with deep water.

Flash Flood in RANDALL, TEXAS
From 18-MAY-23 22:15:00 to 18-MAY-23 23:15:00 (CST-6)
Location: PALO DURO CANYON STATE PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Fast moving water moved a truck bed camper at least 30 feet, and washed away several tents. As well as moved several other trailers. Flooding led to Park Road 5 being closed from the Lighthouse parking lot to the Cactus picnic area.

Tornado in CARSON, TEXAS
From 18-MAY-23 21:02:00 to 18-MAY-23 21:03:00 (CST-6)
Location: PANTEX
Tornado F-scale: EF0
Property damage: 20.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A brief tornado touched down just to the east of FM2373. It
caused some broken tree limbs and tossed a dumpster several yards
back to the south. It resulted in damage to an attached garage,
collapsing the structure. It also blew some horse trailers over
in a nearby field. The tornado lifted in an empty field.