A tornado touched down 3 miles east of Hennessey in Kingfisher County at about 11:00 pm CST on May 7th, destroying a farm home and injuring 3 people. The 3 people were treated for cuts from flying debris, but also received bruises from large hailstones. Three other farmsteads received damage in the area when several outbuildings were destroyed or damaged. Total damages were estimated at $25,000.

This tornado struck the Spring Creek community in northern Caddo County at 6:30 pm CST, injuring 5 people from one family when a house collapsed in the area. A store and a vacant house were also damaged in the community.

The tornado continued northeastward into Canadian County, striking the Fort Reno area at 7:17 pm CST before dissipating 6 miles east of Okarche in southern Kingfisher County at 8:00 pm CST. The hail that accompanied the tornado in Kingfisher County caused $500 in property damage. Estimated damage from this tornado was $32,500.

The Fort Reno area incurred about $15,000 in damages and several buildings were demolished including a large barracks and large hay shed while other buildings were damaged including Lucas Hall. The weather equipment at Fort Reno was destroyed with the rain gauge being found several hundred yards from its original location. Several farms in Canadian County were also damaged.

Four farmsteads were damaged by a tornado southeast of Loyal in Kingfisher County. Two people were injured in the area. A barn was destroyed and total damages were $31,000.

At 6:00 pm CST, a tornado hit an area 2 miles west and 6 miles north of Loyal in Kingfisher County. A barn. shop, granary, and cattle shed were destroyed while 4 houses. a 2-way radio antenna, other antennae, 2 combines, a tractor, and trees were damaged. Two people were injured when a porch fell on them.

A supercell thunderstorm moving to the northeast across the western part of Kingfisher County produced a tornado that caused heavy damage to the Omega community at 10:00 pm CST on June 10th. The Omega school, a two-story classroom building, was unroofed and large portions of its brick walls were knocked down. The entire contents of the school building were windblown and water soaked.

A new gymnasium building was also unroofed and received water damage as were 2 frames teacherages, a mobile home, a round-top garage, and a frame lunchroom building. The superintendent of the school was hit on the head by a falling brick. Every building in town sustained some degree of damage ranging from minor roof damage to total destruction. Many homes had windows broken by hail measuring up to 2.5 inches and flying debris, and suffered interior water damage from heavy rainfall.

A tornado touched down briefly in the southwest corner of Hennessey and moved briefly northeastward. The tornado destroyed two mobile homes, damaged three businesses and some houses, and uprooted trees. Two people were injured slightly at a motel when it was struck by the tornado.

A tornado moving north-northeastward caused damage along a 6-mile path beginning about 6-7 miles southwest of Hennessey. Eight homes/farms including a mobile home suffered damage. Two children in the mobile home were injured and hospitalized.

Two people were hospitalized after a tornado destroyed their mobile home in Hennessey. The winds accompanying the tornado were estimated at 100 mph. Damage in the town was extensive.

This tornado formed 7 miles south of Omega in Kingfisher County and tracked northeast for 12 miles before dissipating 7 miles northwest of Kingfisher. Extensive tree damage and damage to 1 farmstead occurred during the first 2.5 miles of its path. The tornado then reached its maximum width of about 1/4 of a mile, 5 miles west-northwest of Kingfisher where a large, well-built brick home was severely damaged. Although anchored to the foundation, half the walls were collapsed or missing, and the roof was gone, warranting an F3 rating. Along the remainder of the path, a handful of other homes had minor damage, and 7 mobile homes and numerous outbuildings were destroyed or severely damaged. There was also damage to trees, telephone poles, and farm equipment.

This killer tornado was the 6th of seven tornadoes produced by a supercell thunderstorm in northwestern Canadian and Kingfisher counties during the May 3, 1999 tornado outbreak. The tornado produced a damage path 15 miles long and ½ mile wide as it tracked through Kingfisher County. The city of Dover, OK took a direct hit. About one-third of Dover's structures were destroyed. The tornado formed 4 miles south-southwest of Dover, and traveled north-northeast crossing U.S. Highway 81 on the north side of Dover, dissipating about 7 miles east-southeast of Hennessey, OK.

F4 damage was observed on the west side of Dover where a steel-reinforced concrete building only had a few walls remaining; large vehicles were rendered apart; mobile homes' frames were wrapped around tree trunks; and trees lost all their branches and most of their bark. One woman was killed inside a large frame home that collapsed. Approximately 34 mobile homes and houses were either damaged or destroyed in Dover. Outside of Dover, damage was rated primarily F1 and was confined to trees, telephone poles, farm equipment, and outbuildings. Total damage was estimated at $2.5 million.

A large storm system moved through the southern and central Plains during the morning and afternoon of May 19th. Thunderstorms, some of them severe, had developed over the Texas panhandle and moved east into northwest and north central Oklahoma during the early morning hours. Additional development, aided by the low-level jet, occurred into parts of central Oklahoma, north of a warm front that was slowly moving north to near U.S. Interstate I-40.

By midafternoon, the well-defined front was located from parts of west-central into central Oklahoma, just north of the Oklahoma City metro area. Two thunderstorms developed near and along the front, one over Roger Mills and Dewey counties, and the other over northern Blaine County. The storms quickly became tornadic, with the first tornado of the day occurring north of Leedey in Dewey County. Another tornado, and probably the most photographed one of the day, occurred just north of Hennessey. Tornadoes, most of them brief in duration, and large hail continued across western and central Kingfisher County, and across northern Logan, southeast Garfield, and Payne Counties. Another thunderstorm developed further east along the dry line later in the afternoon, and the storm eventually produced a tornado west of Prague in Lincoln County.

This tornado developed just west of Loyal, where an un-anchored trailer home was destroyed and a power pole was downed. The tornado continued east toward the southern edge of Loyal, with tree damage reported in Loyal. The tornado crossed U.S. Highway 81 north of Kingfisher, and a truck was blown off the road with the driver suffering minor injuries. Also, near this location, the Department of Transportation salt barn was destroyed five miles north of Kingfisher and sign/fence damage occurred just east of this location. Monetary damage estimates were not available.

This tornado began very close to the Caddo/Canadian County border and quickly became a strong/violent tornado. The tornado destroyed numerous trees, many of which were debarked, before crossing U.S. Interstate Highway I-40. Three people died in vehicles near the U.S. Interstate Highway I-40 Calumet exit, and two other fatalities occurred just northeast of that location. Cars were thrown thousands of feet off the roadways. It is believed that the tornado reached its maximum intensity just after crossing I-40, and it was here that a mobile radar measured winds of greater than 210 mph just off the surface.

The tornado side-swiped the El Reno Oklahoma Mesonet station (located 5 miles west of El Reno, OK) along its path, and the site measured wind gusts of 131 and 151 mph. From this location, the tornado continued northeast, narrowly missing the town of Piedmont, OK. Widespread EF-3, occasional EF-4 damage occurred between El Reno, OK and Piedmont. More widespread EF-4 damage was seen west and north of Piedmont. Especially hard hit was the Falcon Lake neighborhood, near the Kingfisher County border. Two children were killed at this location.

The tornado entered far southeast Kingfisher County before moving into Logan County. However, EF-3 damage occurred just over the Kingfisher County border, debarking trees and significantly damaging buildings. As the tornado continued northeast, the damage was mainly considered EF-2, with damage to mostly outbuildings and trees. The tornado then continued into Logan County.

The tornado moved into Logan County and resulted in two additional fatalities (both of whom were outside when the tornado struck) near Cashion, OK. The tornado destroyed several manufactured homes (both double and single-wide) after entering Logan County. Large high-transmission line tresses collapsed. Trees were debarked with only stumps remaining. Several buildings had most of their exterior walls collapse, with only the inner walls remaining. EF-2 to occasionally EF-3 damage occurred as the tornado neared Guthrie, OK. Luckily, most of the town of Guthrie was spared to the tornado as it moved west and then north of the center of the city. Finally, the tornado dissipated northeast of Guthrie with some minor tree damage. The tornado’s path total path length was 63 miles, and it was on the ground for nearly one hour and 45 minutes. This was the first EF-5 tornado to occur in Oklahoma since the Enhanced Fujita Scale was adopted by the National Weather Service in 2007.