For the second consecutve day, upper level disturbances rotating around a large upper level low positioned across California and Nevada contributed to scattered thunderstorms development across portions of the Panhandles. The late afternoon thunderstorms developed across the western to central Texas Panhandle near surface trough and dry line features in the area. A moderately unstable but weakly sheared environment led to strong to severe storms which produced large hail 1-2 in diameter and damaging winds mainly around the south-central Texas Panhandle. The strongest storms clustered around Canynon, Texas where flooding was also observed.

Hail in RANDALL, TEXAS
From 16-MAY-21 15:38:00 to 16-MAY-21 16:23:00 (CST-6)
Location: WASHBURN
Magnitude: 2.00 
Reported by: NWS Employee

Multiple reports came in between 1538 CST and 1623 CST around south and southwest Amarillo. These reports came from the public, trained spotters, and even NWS employees. The hail sizes range from 1 inch to 2 inches.

Hail in DEAF SMITH, TEXAS
From 16-MAY-21 16:46:00 to 16-MAY-21 17:06:00 (CST-6)
Location: SIMMS
Magnitude: 1.50 
Reported by: Storm Chaser

Hail in RANDALL, TEXAS
From 16-MAY-21 15:50:00 to 16-MAY-21 16:12:00 (CST-6)
Location: TIMBERCREEK CANYON
Magnitude: 1.25 
Reported by: Trained Spotter

Multiple reports came in from 1550 CST to 1612 CST for hail sizes ranging from 0.75 to 1.25 around southern Amarillo or west to northwest of Timbercreek Canyon. Sources for the reports ranged from public to emergency managers to spotters.

Hail in RANDALL, TEXAS
From 16-MAY-21 17:00:00 to 16-MAY-21 17:15:00 (CST-6)
Location: CANYON
Magnitude: 2.00 
Reported by: NWS Employee

From 1711 CST to 1715 CST multiple reports came in for large hail ranging from 1 to 2 located in Canyon to just northeast of Canyon. Report sources ranged from public to spotters, with a report from an NWS employee as well.

Hail in RANDALL, TEXAS
From 16-MAY-21 17:37:00 to 16-MAY-21 17:44:00 (CST-6)
Location: CANYON
Magnitude: 1.75 
Reported by: Trained Spotter

From 1737 CST to 1744 CST multiple reports of large hail ranging from 1 to 1.75 were made for areas around Cayon to the norhwest through parts of town and ending east of Canyon. Report sources included public and trained spotters.

Hail in DEAF SMITH, TEXAS
From 16-MAY-21 17:47:00 to 16-MAY-21 18:02:00 (CST-6)
Location: MILO CENTER
Magnitude: 1.75 
Reported by: Trained Spotter

From 1747  CST to 1802 CST, multiple reports of large hail ranging from 0.75 to 1.75 came in for an area just south of Vega along HWY 385. Report sources include public and trained spotters.

Hail in POTTER, TEXAS
From 16-MAY-21 17:29:00 to 16-MAY-21 17:30:00 (CST-6)
Location: (AMA)AMARILLO INTL A
Magnitude: 1.00 
Reported by: Official NWS Observations

Right around 1730 CST two reports were made for 1 hail around northeast Amarillo. One of which was an official NWS observation at WFO AMA.

Hail in RANDALL, TEXAS
From 16-MAY-21 17:56:00 to 16-MAY-21 17:57:00 (CST-6)
Location: WASHBURN
Magnitude: 2.00 
Reported by: NWS Employee

Around 1756 CST to 1757 CST two reports of hail larger than 1 were made around east Canyon to just south of Amarillo along the I-27 corridor. One report was for 2 hail made by an NWS employee located 3 miles east of Canyon.

Hail in DONLEY, TEXAS
From 16-MAY-21 18:55:00 to 16-MAY-21 18:55:00 (CST-6)
Location: CLARENDON
Magnitude: 1.25 
Reported by: Law Enforcement

Hail in DALLAM, TEXAS
From 16-MAY-21 18:59:00 to 16-MAY-21 18:59:00 (CST-6)
Location: PERICO
Magnitude: 1.50 
Reported by: Storm Chaser

Accumulating hail between pea and dime size, with larger stones up to ping pong ball  noted. Area roadway is covered with hail.

Hail in CARSON, TEXAS
From 16-MAY-21 19:19:00 to 16-MAY-21 19:19:00 (CST-6)
Location: WHITE DEER
Magnitude: 0.75 
Reported by: Storm Chaser

Hail in RANDALL, TEXAS
From 16-MAY-21 19:00:00 to 16-MAY-21 19:22:00 (CST-6)
Location: CANYON
Magnitude: 1.50 
Reported by: NWS Employee

Once again portions of Canyon especially eastern to northern portions received large hail, this time maxing out at 1.5.

Hail in RANDALL, TEXAS
From 16-MAY-21 18:57:00 to 16-MAY-21 18:59:00 (CST-6)
Location: UMBARGER
Magnitude: 1.75 
Reported by: Public

Hail in RANDALL, TEXAS
From 16-MAY-21 18:44:00 to 16-MAY-21 18:44:00 (CST-6)
Location: UMBARGER
Magnitude: 1.50 
Reported by: Public

Hail in RANDALL, TEXAS
From 16-MAY-21 18:27:00 to 16-MAY-21 18:38:00 (CST-6)
Location: CANYON
Magnitude: 1.25 
Reported by: Public

Flash Flood in RANDALL, TEXAS
From 16-MAY-21 18:02:00 to 16-MAY-21 20:27:00 (CST-6)
Location: CANYON
Flood cause: Heavy Rain
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Fire officials reported stranded vehicles and flooded roads along I-27 and HWY 217. Several other reports came in from the public of stranded vehicles as well.

Flood in RANDALL, TEXAS
From 16-MAY-21 17:02:00 to 16-MAY-21 18:31:00 (CST-6)
Location: TIMBERCREEK CANYON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Reports received of curb to curb flooding.

Thunderstorm Wind in RANDALL, TEXAS
From 16-MAY-21 17:45:00 to 16-MAY-21 17:45:00 (CST-6)
Location: CANYON
Magnitude: 65.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Downed powerlines were reported at 23rd St. and  10th Ave in Canyon.