Tornadoes also develop occasionally in southern Canada during the Northern Hemisphere's summer and somewhat regularly at other times of the year across Europe, Asia, Argentina and Australia.

[7] A mesoscale convective system developed across eastern Texas early on January 2, aided by the combination of a strong upper-level trough, a moderately unstable atmosphere, and sufficient moisture.

[16]In the pre-dawn hours of January 21, a complex of strong thunderstorms affected the Gulf Coast states, where the SPC had issued an Enhanced risk of severe weather.

[34] Several damaging tornadoes touched down, including a violent EF4 that leveled and swept away homes at the north edge of Perryville, Missouri, and killed one person.

Later that day, an EF2 occurred near Marshall, Texas, and snapped or uprooted many trees, destroyed a metal outbuilding, damaged multiple carports, and ripped roofing off several residences.

A large EF1 wedge tornado passed near Natchitoches, Louisiana, and damaged a metal warehouse, a pool supply building, and several outbuildings and homes.

One of these EF2 tornadoes struck Belah and Trout, toppling metal truss towers, snapping many trees and power poles, and collapsing a boat business.

[45] However, a mainly unidirectional wind profile was present in the threat area that day, though explosive CAPE values and very steep lapse rates in combination with locally enhanced helicity due to outflow boundaries left behind by earlier storms were expected to compensate for this.

Another EF2 wedge tornado tracked from the eastern part of Johnston, South Carolina, and directly through Ward, causing damage to a few homes and businesses and snapping or uprooting many trees.

A large and damaging EF2 also tracked from just east of Cadwell, Georgia, to near Soperton, destroying an auto body shop, multiple outbuildings, a radio antennae, and much of the second floor of a two-story home.

A high-end EF2 tornado struck the southern part of Elk City, Oklahoma, damaging or destroying numerous homes and businesses, tossing vehicles, and killing one person.

[55] By May 18, a major outbreak of strong tornadoes was expected across the Great Plains, and a high risk of severe weather was issued by the Storm Prediction Center.

[57] On June 12, the Storm Prediction Center issued a moderate risk for severe thunderstorms across southeast Wyoming, northwest Nebraska, and southwest South Dakota.

[60] One of these tornadoes was caught on video and photographed by numerous storm chasers as it passed near Carpenter, Wyoming, causing severe damage to outbuildings, vehicles, power poles, and homes in the area.

In Nebraska, a long-track, multiple-vortex EF2 tornado passed near Bayard, tearing the roof and an exterior wall from a house, denuding trees, twisting irrigation pivots, damaging outbuildings, and destroying a garage.

One of these tornadoes was a high-end EF2 that downed many trees and caused major structural damage to homes as it moved through multiple subdivisions in the southern part of Bellevue.

The other tornado was an EF1 that struck Offutt Air Force Base, moving planes from their original locations, downing trees, and damaging the roofs of several structures.

The most significant tornado of the event was an EF2 that struck the small town of Prairieburg, Iowa, where a grain elevator sustained major damage, mobile homes were destroyed, and trees were snapped.

This included a large, high-end EF2 multiple-vortex tornado on July 11 that passed near the town of Buxton, snapping and uprooting many trees and destroying outbuildings as it impacted multiple farmsteads.

The tornado caused infrastructure damage to the BOK Financial Corporation's operations center, disabling its online, mobile and automated telephone systems.

Despite the presence of strong low-level rotation that was detected on radar, the Tulsa County Emergency Management Agency did not activate civil defense sirens in Tulsa proper as the local National Weather Service forecast office did not issue a tornado warning until 1:25 a.m. CDT (06:25 UTC), two minutes before it spawned an EF1 tornado that spanned a 2.9-mile-long (4.7 km) track across Broken Arrow, causing roof damage to numerous homes and bringing down several large tree limbs in the suburb.

[16] During the overnight hours of September 4, an isolated EF2 tornado struck the town of North Robinson, Ohio, destroying detached garages and significantly damaging homes.

Another brief but destructive EF2 tornado near Crescent ripped the roofs and top floor exterior walls from several large condominium buildings, while a third EF2 rolled a pickup truck and damaged homes near Mims.

[87] The tornado also did damage to part of the Riverwind Casino, which at the time was hosting a Beach Boys concert attended by Oklahoma governor Mary Fallin.

Later that day, severe thunderstorm began to organize in a modestly unstable, highly sheared environment spanning from Missouri to New York, resulting in a multitude of hail and wind reports.

Rotating supercell thunderstorms developed across parts of the Ohio Valley late that afternoon and evening, and multiple tornadoes began touching down and causing damage.

One EF2 tornado struck Galion, tearing the roof off of a house, snapping trees, and severely damaging industrial buildings in town, while another brief EF2 obliterated a barn near Republic.

In northeastern Ohio, a large and powerful macroburst with winds of up to 105-MPH caused significant damage in numerous towns and communities throughout Lorain, Medina, Cuyahoga, Summit, Portage and Geauga counties.

Tractors were thrown and mangled, reinforced concrete power poles were broken, trees were denuded and debarked, and branches were found impaled into walls of structures that remained standing before the third and final tornado dissipated.

A church and some small brick homes were leveled, and several other structures sustained significant damage, including the town clinic, school, and police station.