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 storms finally weakened early Sunday morning as instability decreased.

Thunderstorm Wind in CIMARRON, OKLAHOMA
From 12-JUN-21 21:30:00 to 12-JUN-21 21:30:00 (CST-6)
Location: BOISE CITY
Magnitude: 68.00 MG
Reported by: Mesonet

Thunderstorm Wind in CIMARRON, OKLAHOMA
From 12-JUN-21 21:35:00 to 12-JUN-21 21:40:00 (CST-6)
Location: BOISE CITY
Magnitude: 68.00 MG
Reported by: Mesonet

Two different wind gusts 5 mins apart, highest was 78 mph, were measured by the mesonet station located in Boise City. At the same time reports of cottonwood trees being ripped apart in Boise City came in from the public.

Hail in CIMARRON, OKLAHOMA
From 12-JUN-21 21:34:00 to 12-JUN-21 21:34:00 (CST-6)
Location: BOISE CITY
Magnitude: 1.00 
Reported by: Trained Spotter

Thunderstorm Wind in CIMARRON, OKLAHOMA
From 12-JUN-21 20:30:00 to 12-JUN-21 20:30:00 (CST-6)
Location: KENTON
Magnitude: 60.00 EG
Reported by: Emergency Manager

Some tree limbs were snapped and a metal roof was peeled back slightly on local business.

Thunderstorm Wind in CIMARRON, OKLAHOMA
From 12-JUN-21 21:35:00 to 12-JUN-21 21:35:00 (CST-6)
Location: FELT
Magnitude: 60.00 EG
Reported by: Emergency Manager

Several large tree limbs broken and on the ground.

Thunderstorm Wind in CIMARRON, OKLAHOMA
From 12-JUN-21 22:30:00 to 12-JUN-21 22:30:00 (CST-6)
Location: GRIGGS
Magnitude: 61.00 EG
Reported by: Emergency Manager

Three limbs snapped and shed was shifted off its foundation and relocated.