A weak upper level disturbance moved along the northern side of an upper level ridge centered across the Desert Southwest generating thunderstorms over the mountains of Colorado and New Mexico. These storms slowly moved east into the Panhandles and encountered an environment with weak to moderate wind shear but extreme instability and high moisture which allowed these storms to thrive and increase in severity and organization as they tracked east. The main impact from the storms were from damaging winds as they crossed out of New Mexico and Colorado into the Panhandles, but some hail was also reported. The most significant damage occurred with a storm that strongly bowed as it moved southeast across Cimarron County Oklahoma. This storm produced wind speeds likely around 90 mph in some locations based on damage and were measured just shy of 80 mph near Boise City, OK at a mesonet site. The storm produced widespread wind damage from Kenton to Boise city and southeast to Griggs, OK. Widespread damage to trees and powerlines occurred and isolated significant roof damage occurred as well, including the Boise City High School auditorium, which lost part of it's roof completely. Fifty-five power poles were reported damaged across Cimarron County with around 1600 customers without power during the peak outage after the storms. Power was out until well into the afternoon hours on Sunday for some locations. This storm continued to grow upscale and eventually merged across the northwestern Texas Panhandle with another broken line of storms that had crossed the New Mexico border near I-40, also producing severe wind gusts as they entered the Texas Panhandle. This storm complex tracked east-southeast and continued to produce severe wind gusts and heavy rainfall, especially across the northern and central Texas Panhandle. The storm complex finally weakened early Sunday morning as instability decreased.

Flash Flood in DALLAM, TEXAS
From 12-JUN-21 23:10:00 to 12-JUN-21 23:50:00 (CST-6)
Location: DALHART
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Water reported over curb with a few inches of water covering all the lanes of HWY 87.

Thunderstorm Wind in RANDALL, TEXAS
From 13-JUN-21 01:13:00 to 13-JUN-21 01:13:00 (CST-6)
Location: AMARILLO
Magnitude: 61.00 EG
Reported by: Public

Approximately 6 inch diameter tree down near Zita and along loop 335.

Thunderstorm Wind in SHERMAN, TEXAS
From 12-JUN-21 22:22:00 to 12-JUN-21 22:22:00 (CST-6)
Location: MALLETT
Magnitude: 58.00 MG
Reported by: Mesonet

Thunderstorm Wind in HARTLEY, TEXAS
From 12-JUN-21 22:35:00 to 12-JUN-21 22:57:00 (CST-6)
Location: (DHT)DALHART MUNI AR
Magnitude: 55.00 MG
Reported by: ASOS

At least 4 different wind gusts exceeding 60 mph, the highest being 63 mph, were registered  in the span of 22 minutes.

Thunderstorm Wind in MOORE, TEXAS
From 12-JUN-21 23:35:00 to 12-JUN-21 23:35:00 (CST-6)
Location: DUMAS MUNI ARPT
Magnitude: 53.00 MG
Reported by: AWOS

Thunderstorm Wind in DEAF SMITH, TEXAS
From 12-JUN-21 23:50:00 to 12-JUN-21 23:50:00 (CST-6)
Location: WALCOTT
Magnitude: 53.00 MG
Reported by: Mesonet

Thunderstorm Wind in HUTCHINSON, TEXAS
From 13-JUN-21 00:08:00 to 13-JUN-21 00:08:00 (CST-6)
Location: HUTCHINSON CO ARPT
Magnitude: 58.00 MG
Reported by: ASOS

Thunderstorm Wind in POTTER, TEXAS
From 13-JUN-21 00:17:00 to 13-JUN-21 00:17:00 (CST-6)
Location: (AMA)AMARILLO INTL A
Magnitude: 53.00 EG
Reported by: Trained Spotter

Spotter measured wind gust using handheld wind meter.

Thunderstorm Wind in MOORE, TEXAS
From 12-JUN-21 23:28:00 to 12-JUN-21 23:28:00 (CST-6)
Location: CACTUS
Magnitude: 70.00 EG
Reported by: Public

Tree limbs, 3 inches in diameter, were blown down along with power poles  blown over in Cactus, TX.

Thunderstorm Wind in MOORE, TEXAS
From 12-JUN-21 23:23:00 to 12-JUN-21 23:23:00 (CST-6)
Location: CACTUS
Magnitude: 65.00 MG
Reported by: Trained Spotter

Spotter had measured the thunderstorm wind gust with a handheld wind meter.

Thunderstorm Wind in POTTER, TEXAS
From 13-JUN-21 00:13:00 to 13-JUN-21 00:13:00 (CST-6)
Location: VALLE DE ORO
Magnitude: 70.00 EG
Reported by: Public

Report received of power poles blown down.

Thunderstorm Wind in POTTER, TEXAS
From 13-JUN-21 00:29:00 to 13-JUN-21 00:29:00 (CST-6)
Location: AMARILLO
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Report of shingles torn off of roof.