2007 Enterprise tornado

Template:Infobox weather eventTemplate:Infobox weather event/TornadoTemplate:Infobox weather event/EffectsTemplate:Infobox weather event/FooterTemplate:Distinguish During the midday hours of March 1, 2007, a supercell produced a destructive tornado that tracked along a 10.3-mile-long path through Enterprise, Alabama, causing heavy damage. The tornado would be part of a larger outbreak that lasted from February 28 to March 2. The tornado would inflict severe damage to the Enterprise High School, where it would kill 8 students. This tornado would be the deadliest tornado to strike a school since the Belvidere tornado in 1967. This would be the deadliest tornado in the outbreak as well. The tornado would spend much of it's 10 miles ({{rnd/cTemplate:Rnd/b|16|(1−1)|0}} km) in Enterprise, flattening many homes and businesses. While school was to be dismissed at 1:00 p.m., the tornado struck before much of the school could be dismissed. The tornado would cause 50 significant injuries as well.

Meteorological synopsis

The sever weather outlook outlined by the National Weather Service and Storm Prediction Center for March 1, 2007.

On February 28, a low-pressure formed across the Midwestern United States, moving east. A low level trough was present, bringing in warm moist air from the Gulf of Mexico. Temperatures reached Template:Convert/F. Dewpoints were as high as Template:Convert/F, leading to rapid storm development. Because of this, a moderate risk was issued across the Southwest. As March first came around, the Moderate risk was placed over the Oklahoma, Kansas, Arkansas, Missouri interjection. a 15% hatched risk for tornadoes were over much of the same place. By 8 a.m., the moderate risk had formed to a L shape, with Illinois to the north, and stretching as far as South Carolina. A high risk was outlined directly over the Mississippi and Alabama, with a 30% hatched risk mostly in Alabama. at around 1800 UTC (12:00p.m., CST), the 500 Millibars had showed a negatively tilt over Iowa. A 115-mph jet stream at this level stretched from north-central Texas across southeast Missouri into central Illinois. At the 850 mb level, a 58-mph jet stream of warm, moist air flowed from the Louisiana Gulf Coast across central Alabama into eastern Tennessee. At this time, tornadic supercells had formed, strengthening as they moved into Alabama. The first tornado touched down at 7:30 a.m., an EF0. A single supercell formed around midday and headed toward Enterprise. The cell was warned with a tornado warning at 12:47 p.m.

Tornado summary

City wide damage in Enterprise.

At 1:08 p.m., a tornado touched down just south of Enterprise, initially inflicting light damage to the Enterprise Municipal Airport before destroying several chicken coops. As it moved toward Enterprise, the tornado rapidly intensified and struck the south side of town. Taking the form of a large wedge tornado, it briefly became visible before reaching maximum intensity directly over the high school, where it caused catastrophic destruction. Nearly every hallway sustained damage, including one where eight students sheltering inside were killed when a concrete wall collapsed on them. The high school was the site of most of the injuries, with at least 40 people hurt. Continuing northeast, the tornado caused further EF4-level damage, severely impacting Hillcrest Elementary School. In the aftermath, uninjured students from both schools were escorted by emergency personnel to Hillcrest Baptist Church, which was unharmed, to reunite with their distressed parents. Emergency responders also focused on transporting the most seriously injured to local hospitals while providing on-site care to others. The tornado then destroyed a house, killing an older woman, before weakening and dissipating a few miles northeast of Enterprise. In total, the storm left nine people dead and at least 50 severely injured. Numerous homes and businesses suffered extensive damage, with some completely flattened. Several other schools and the local YMCA were among the damaged buildings. According to the Red Cross, 239 homes were destroyed, and 374 sustained major damage.

Aftermath

United States President George H.W Bush surveying the Enterprise High School from Marine One.

Recovery efforts

Shortly after the tornado subsided, Governor Bob Riley deployed over 100 National Guard troops, with additional forces on standby. President George W. Bush declared Enterprise a Disaster Area, and FEMA provided extensive assistance in cleanup operations and the establishment of temporary shelters. A curfew was enforced from dawn to dusk. In the aftermath, an investigation was launched to assess whether students should have been dismissed before the storm occurred.

The Alabama National Guard being deployed for recovery efforts.

However, a survey conducted by the National Weather Service office in Tallahassee indicated that the death toll could have been substantially higher due to the extensive damage sustained in the parking lot and surrounding areas. Additionally, earlier thunderstorm activity in the region, including two other rotating supercells moving toward Enterprise later that morning, made evacuation efforts unsafe.

Assessments and rating

A subsequent service assessment by the NWS determined that the school had implemented effective safety measures to minimize and prevent potential loss of life as the tornado approached, confirming that students were positioned in the safest area of the building. However, the assessment recommended the addition of hardened “safe rooms” with reinforced construction to further mitigate the impact of future disasters involving large and violent tornadoes striking substantial structures. A comparable tornado on July 13, 2004, in Roanoke, Illinois, destroyed an industrial facility; however, the presence of such rooms ensured that no one present sustained serious injuries. The school moved to a different location shortly after, and opened again in 2010, with the former site becoming an elementary school.

The tornado itself was estimated to have been Template:Convert/yd wide and have had a path length of 10 miles ({{rnd/cTemplate:Rnd/b|16|(1−1)|0}} km). It dissipated shortly after leaving Enterprise. It was given an initial rating of EF3 on the Enhanced Fujita Scale. However, after a detailed survey, the tornado was upgraded to a low-end EF4 with winds around Template:Convert/mph. This upgrade was based on the finding of flattened houses near the school. A total of $307 million in damages were inflicted on the city of Enterprise. The tornado became the strongest tornado ever warned and tracked through in NWS Tallassee history.

Other tornadoes and non-tornadic impacts

Tornado outbreak of February 28 – March 2, 2007

The tornadoes that occurred in Georgia from the outbreak.

There were 57 other tornadoes that touched down across the Midwest in the outbreak, including two other EF4 tornadoes that struck Kansas and a second EF4 in Alabama. In all, 20 (19 direct) fatalities occurred in the entire outbreak, including 98 injuries as well. In all, over $580 million (2008 USD) of damage was reported. On the opposite side of the low-pressure system, a significant blizzard impacted the northern Great Plains and Upper Midwest, affecting regions such as Minnesota, Manitoba, Saskatchewan, Wisconsin, Iowa, and Nebraska. Reports indicated snowfall amounts ranging from 8 to 18 inches (20 to 46 centimeters) in several areas, along with accumulations between 6 and 11 inches (15 to 28 centimeters) across portions of Ontario and Quebec.

Enterprise was hit again by a weaker tornado on October 8, 2008; however, no one was injured.

See also

• Tornado outbreak of February 28 – March 2, 2007
• List of F4 and EF4 tornadoes (2000–2009)
• Tornadoes of 2007