Moore tornado
The 2013 Moore tornado was a large and extremely violent EF5 tornado that ravaged Moore, Oklahoma, and adjacent areas on the afternoon of May 20, 2013, with peak winds estimated at 200–210 mph (320–340 km/h), killing 24 people (plus two indirect fatalities) and injuring 212 others. The tornado was part of a larger outbreak from a slow-moving weather system that had produced several other tornadoes across the Great Plains over the previous two days, including five that had struck portions of Central Oklahoma the day prior on May 19.
What was the 2013 Moore tornado?
The 2013 Moore tornado was an exceptionally violent EF5 tornado that struck Moore, Oklahoma, on the afternoon of May 20, 2013. Forming at 2:56 PM CDT, the tornado spent 39 minutes on the ground, carving a catastrophic 13.85-mile path through southern Oklahoma City, Newcastle, and Moore. At its peak intensity, it reached a maximum width of 1.08 miles and generated estimated peak wind speeds between 200 and 210 mph. As the vortex tore through residential communities and commercial zones, it left behind absolute devastation, flattening entire neighborhoods and stripping the landscape down to bare soil. The sheer ferocity of the storm solidified its place in history as one of the most destructive tornadoes ever recorded in the United States, and it stands as the most recent EF5 tornado to strike Oklahoma. The impacts extended far beyond physical damage; thousands of individuals were displaced, and infrastructure sustained catastrophic damage. The extensive damage prompted an unprecedented local, state, and federal response.
What was the Meteorological Setup for the 2013 Moore tornado?
The meteorological setup for the 2013 Moore tornado featured a volatile combination of extreme atmospheric instability, robust wind shear, and powerful lifting mechanisms. On May 20, 2013, a broad, deeply amplified upper-level trough was positioned over the Western United States, progressing eastward toward the Central Plains. In the lower levels, a potent mid-latitude cyclone lifted northeastward across the Dakotas, trailing a sharp cold front. Concurrently, a prominent dryline surged eastward across western Oklahoma. Ahead of the dryline, the warm sector was exceptionally unstable. Surface temperatures soared into the mid to upper 80s Fahrenheit, while surface dewpoints surged into the low to mid-70s, creating a highly buoyant air mass. Mixed-Layer Convective Available Potential Energy (MLCAPE) values exceeded 3500 to 5000 J/kg. Furthermore, deep-layer wind shear was highly favorable, with speeds ranging from 40 to 50 knots. Low-level wind shear enhanced storm-relative helicity values to over 250 m2/s2, strongly supporting low-level mesocyclone formation. The juxtaposition of intense CAPE and robust wind shear created an explosive parameter space. As daytime heating eroded the capping inversion, convective updrafts broke through. A discrete supercell initiated ahead of the main line of storms along the dryline in northern Grady County. This isolated storm rapidly acquired intense rotation, evolving into a classic cyclic tornadic supercell that would go on to produce the devastating EF5 tornado. Detailed meteorological analysis and archived data can be found via the NWS Norman Weather Forecast Office website at [1]
Can you detail the Warning Process and the 3:01 PM Tornado Emergency?
The warning process during the 2013 Moore tornado event represents a critical study in modern meteorological communication and the vital importance of real-time situational awareness. The Storm Prediction Center in Norman, Oklahoma, had highlighted the region in a 'Moderate Risk' for severe weather early in the day. As the tornadic supercell initiated and rapidly intensified southwest of the Oklahoma City metropolitan area, meteorologists at the National Weather Service (NWS) Weather Forecast Office in Norman closely monitored its evolution using the KTLX WSR-88D radar. The NWS Norman office issued the initial Tornado Warning for the storm at 2:40 PM CDT, providing an impressive 16-minute lead time before the tornado officially touched down northwest of Newcastle at 2:56 PM CDT. As the tornado progressed east-northeastward, it rapidly grew in size, intensity, and destructive capability. Radar data revealed a profoundly intense classic tornadic signature, including a textbook 'hook echo' and a highly pronounced Tornadic Vortex Signature (TVS). Crucially, the radar detected a distinct Tornado Debris Signature (TDS), confirming the tornado was actively lofting significant structural debris. Recognizing the catastrophic threat posed by this massive vortex bearing down on heavily populated areas of South Oklahoma City and Moore, NWS Norman meteorologists took a decisive step. At 3:01 PM CDT, they elevated the existing warning to a 'Tornado Emergency,' the most severe and urgent alert level possible. The exact text of the warning update was stark: 'TORNADO EMERGENCY FOR SOUTH OKLAHOMA CITY AND MOORE. DEADLY TORNADO ON THE GROUND.' The issuance of the Tornado Emergency signaled to the public and emergency responders that this was a life-threatening situation demanding immediate action. The clear, unambiguous language used by broadcasters and the NWS, emphasizing that survival required being underground or in a reinforced safe room, undoubtedly saved hundreds of lives. The 16-minute lead time for the initial touchdown, coupled with the urgent 3:01 PM Tornado Emergency issuance, is widely regarded as a highly successful warning operation. The full timeline and warning archive can be viewed at the NWS Norman official page: [2]
What is the School Damage Analysis involving Plaza Towers and Briarwood?
One of the most tragic and deeply defining aspects of the 2013 Moore tornado was its catastrophic impact on educational infrastructure, specifically the destruction of Briarwood Elementary School and Plaza Towers Elementary School. The tornado struck during school hours, shortly after 3:00 PM CDT, when students and staff were present and sheltering in place. As the massive EF5 vortex entered the city limits of Moore, it was near its peak intensity, producing wind speeds estimated well over 200 mph. Briarwood Elementary School, located in the southwestern portion of Moore, was the first to sustain a direct hit. The tornado completely destroyed the building, tearing off the roof, collapsing multiple load-bearing walls, and severely mangling the steel framework. Miraculously, despite the complete leveling of the facility, there were no fatalities among the students and staff at Briarwood, a testament to the heroic efforts of the teachers who shielded their students and their adherence to severe weather protocols. However, the situation at Plaza Towers Elementary School, located approximately 1.5 miles to the east-northeast, was profoundly more tragic. The tornado struck Plaza Towers directly, delivering winds of EF5 intensity. The building, constructed with older masonry and cinder block walls, suffered a catastrophic failure. The extreme winds caused the complete collapse of the roof structure and the blowout of exterior and interior walls. Particularly devastating was the collapse of a substantial cinder block wall in the school's central hallway and restroom areas, where many young students were sheltering. The sheer weight of the collapsing masonry and steel beams trapped numerous children beneath piles of rubble. In the frantic aftermath, first responders, teachers, and local residents engaged in a desperate rescue operation, digging through the debris in a race against time. Tragically, seven third-grade students lost their lives at Plaza Towers Elementary, crushed by the collapsing walls. This heartbreaking loss initiated intensive nationwide scrutiny regarding the structural integrity of school buildings in tornado-prone regions and the critical necessity for purpose-built storm shelters. Following the disaster, the city of Moore implemented stringent new building codes. Official damage assessment reports are maintained by the National Weather Service [3].
What was the human impact and the rebuilding process after the tornado?
The human impact of the 2013 Moore tornado was devastating, permanently altering the lives of thousands of residents. The storm resulted in 24 direct fatalities, a tragic toll that included the seven young children at Plaza Towers Elementary School. Additionally, there were two indirect fatalities attributed to the storm's aftermath, and over 212 individuals suffered injuries ranging from minor lacerations to severe trauma. The immediate aftermath resembled a war zone, with bewildered residents emerging from shelters into a completely unrecognizable landscape of splintered wood, twisted metal, and pulverized concrete. The widespread displacement created an immediate humanitarian crisis, necessitating massive emergency shelter operations, extensive medical triage, and long-term psychological support services for survivors. However, amidst the overwhelming devastation, the community of Moore demonstrated extraordinary resilience. The rebuilding process began almost immediately, driven by an indomitable spirit of recovery. The federal government, via FEMA, provided crucial financial assistance to aid in debris removal, temporary housing, and infrastructure repair. In a pioneering move that set a new standard for community resilience, the city of Moore adopted some of the strictest residential building codes in the United States. These new codes mandated the use of hurricane clips to secure roofs to walls, the implementation of more robust nailing patterns for roof decking, and the requirement for continuous structural sheathing, significantly improving the wind resistance of newly constructed homes. The disaster also catalyzed a massive surge in the installation of residential and commercial storm shelters.
What is the Minute-by-Minute Timeline of the Moore Tornado?
The 2013 Moore tornado was characterized by a rapid escalation from a severe thunderstorm into an EF5 monster over a relatively short period. At 2:00 PM CDT, severe thunderstorms began developing rapidly along a frontal boundary west of Oklahoma City, prompting the Storm Prediction Center to issue a PDS Tornado Watch for the region. By 2:40 PM, a discrete supercell thunderstorm southwest of the metro area exhibited strong low-level rotation on radar, leading the NWS Norman office to issue the first Tornado Warning, providing critical lead time. At 2:56 PM, the tornado officially touched down just northwest of Newcastle. Initially, the damage was rated EF0 to EF1, but the vortex was rapidly organizing and expanding in size. By 3:01 PM, the tornado crossed Interstate 44 and entered the city limits of Oklahoma City, escalating to EF3 intensity. Recognizing the severe and immediate threat, the NWS issued the historic 'Tornado Emergency for South Oklahoma City and Moore.' At 3:05 PM, the tornado crossed into the city limits of Moore, quickly intensifying to EF4 strength and growing to over half a mile wide. The storm completely destroyed the Orr Family Farm and heavily damaged the adjacent Celestial Acres horse training facility. At 3:11 PM, the tornado reached its peak EF5 intensity, with winds estimated at 210 mph, and struck Briarwood Elementary School, completely leveling the structure. Minutes later, at 3:15 PM, the EF5 vortex impacted Plaza Towers Elementary School, causing the catastrophic collapse of the building and resulting in the deaths of seven students. The tornado continued its devastating path eastward, flattening thousands of homes, and causing severe damage to the Moore Medical Center. By 3:30 PM, the tornado began to slowly weaken as it moved east of Interstate 35, narrowing in size but still producing EF2 to EF3 damage. Finally, at 3:35 PM, the tornado dissipated near the intersection of SE 4th Street and Air Depot Boulevard, just east of Moore. Detailed radar chronologies can be found at the NWS Norman historical event archive [4].
Moore Tornado Track
The mapped ground track below shows the surveyed touchdown point, damage corridor, and dissipation coordinates recorded by NWS field crews. The Moore tornado traveled 13.85 miles across McClain and Cleveland counties, Oklahoma. Coordinates are derived from the official SPC historical tornado database.
What was the cost of the 2013 Moore tornado?
The damage estimates reached up to $2 billion in 2013 USD, classifying it as a multi-billion dollar disaster. The catastrophic destruction of over a thousand homes, multiple schools, commercial businesses, and significant municipal infrastructure, including the Moore Medical Center, contributed to this massive financial toll.
How long did the Moore tornado last?
The tornado remained on the ground for exactly 39 minutes, touching down at 2:56 PM CDT and officially dissipating at 3:35 PM CDT. During this nearly 40-minute duration, it traversed 13.85 miles.
Did the Moore tornado hit any schools?
Yes, the tornado tragically struck two elementary schools during normal operating hours. It completely destroyed Briarwood Elementary School (miraculously with no fatalities) and delivered a devastating blow to Plaza Towers Elementary School, where the catastrophic collapse of a cinder block wall resulted in the heartbreaking deaths of seven young students.
What was the lead time for the Moore tornado warning?
The National Weather Service provided an exceptional 16-minute lead time before the tornado officially touched down, and nearly 25-30 minutes of lead time before the storm struck the most heavily populated areas of Moore. This advance warning, compounded by the issuance of a 'Tornado Emergency' well before the storm reached maximum intensity in Moore, is credited with saving countless lives despite the horrific EF5 strength of the vortex. The rapid and decisive action by NWS meteorologists in Norman is considered a defining example of successful severe weather forecasting and communication.