An upper level wave crossed over the Four Corners region and focused isolated severe thunderstorms over San Juan County during the evening of the 26th. A rapidly developing thunderstorm around Farmington moved quickly northeast and pounded the area from Flora Vista to Aztec shortly after sunset. These storms produced damage to trees and power lines, as well as flash flooding that damaged roads and businesses in the Aztec and Flora Vista areas. The flood waters pushed several homes off their foundations and swept away one propane gas tank. Several schools were impacted by flooding. Police and fire departments responded to 59 fire calls and 51 law enforcement calls about flooding, trapped individuals, power pole fires, and downed trees. Shelters were set up in the area for those impacted by flood waters, though no one had used the facilities. Sandbags were utilized to divert flood waters away from the nearby convention center. The flooding caused all schools to close in Aztec on the 27th and just the Lydia Rippey Elementary school on the 28th.  Major damages were also seen at the Aztec Municipal Golf Course at Hidden Valley, which closed until further notice for necessary repairs. Total estimated damages from this isolated severe thunderstorm were in excess of $1 million dollars.

Thunderstorm Wind in SAN JUAN, NEW MEXICO
From 26-AUG-15 18:40:00 to 26-AUG-15 18:50:00 (MST-7)
Location: AZTEC
Magnitude: 65.00 EG
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Damaging winds caused multiple trees to fall over, landing on houses and power lines.  This caused power outages for portions of Aztec, Flora Vista, and Crouch Mesa.

Thunderstorm Wind in SAN JUAN, NEW MEXICO
From 26-AUG-15 19:40:00 to 26-AUG-15 20:00:00 (MST-7)
Location: FLORA VISTA
Magnitude: 90.00 EG
Property damage: 350.00K
Crop damage: 0.00K
Reported by: Public

Significant damage reported on a property near Flora Vista likely the result of intense microburst winds.  The winds downed over 100 very large cottonwood trees, including a few that were completely uprooted.  The tops of a few trees were completely snapped off, as well.  Metal roofing on a barn was torn off and horizontally displaced about 20 yards on nearby power poles.  The falling timber along with the wind itself caused damage to a barn roof, a pop up camper, a canoe, a trampoline, and a camper. Based on the EF-toolkit winds from this storm may have reached as high as 104 mph. No injuries or further damages resulted from the microburst.

Flash Flood in SAN JUAN, NEW MEXICO
From 26-AUG-15 18:50:00 to 26-AUG-15 20:50:00 (MST-7)
Location: AZTEC
Flood cause: Heavy Rain
Property damage: 1.00M
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The Blanco Arroyo overflowed its banks and, combined with heavy rain across the area, led to significant flash flooding. Firefighters rescued a few individuals from the roofs of their homes, otherwise no major injuries or fatalities were reported.  Several homes were reportedly shifted off their foundation and a propane tank at one of those homes was swept away in the flood waters.  Multiple classrooms were damaged at three area schools, causing all schools to be closed on the 27th and one school, Lydia Rippey Elementary, to be closed on the 28th.  The Aztec Municipal Golf Course at Hidden Valley was closed until further notice due to damages incurred from the flooding.  A large rock slide closed Navajo Road 36 at mile marker 28, with other smaller road closures reported around Aztec.  Measured rainfall in the area ranges from an inch to a little over an inch and a half.