May 4–6 (United States) On May 4, a moderate risk was issued for an area from
Central Oklahoma southward into
North Texas, including a 15% risk of tornadoes. Multiple tornadic supercells formed that afternoon and evening, several tornadoes tore through the area, including a few that were strong. This included a mile-wide EF2 multiple-vortex tornado that caused extensive damage in the town of
Seminole, Oklahoma, where multiple homes, businesses, and other buildings were heavily damaged, and some had their roofs torn off. Numerous trees and power poles were snapped throughout the town, and several garages and older brick buildings were destroyed. An EF0 tornado struck a
cannabis farm near the town of
Maud, where multiple greenhouses and trailers were destroyed. An EF1 tornado damaged homes, power poles, and trees in
Cromwell, while another EF2 tornado caused significant damage to a business, homes, outbuildings, and trees along an unusual looping path as it clipped the east edge of
Earlsboro. Farther to the south, a large EF3 tornado touched down near
Lockett, Texas, bending large steel power poles to the ground in a rural area and scouring topsoil before striking the town, where metal buildings were destroyed, sheet metal was wrapped around trees, one storm shelter lost its door, homes and other structures had their roofs torn off, and multiple vehicles were moved and damaged, including a storm chasing tour van that was blown off the road, resulting in a few minor injuries. More severe weather was expected the next day and an enhanced risk for severe weather was issued from
Central Texas northeastward into much of
Arkansas. Damaging winds were expected to be the main hazards, but a few tornadoes were expected. Five tornadoes touched down that afternoon in
Oklahoma,
Texas, and Arkansas. This included an EF2 tornado that destroyed barns, shifted a house off its foundation, damaged mobile homes, and snapped numerous trees near
Henderson, Texas, injuring one person. Another EF2 tornado touched down near
Almyra, Arkansas, destroying a pole barn and toppling several metal truss transmission towers, one of which had a metal shipping container thrown into its base. The severe weather risk shifted eastward on May 6 and another enhanced risk was issued from
Central Alabama northeastward into
Southern Virginia, with both damaging winds and tornadoes expected to be the primary hazards. Several tornadoes touched down that afternoon, though all were weak. This included an EF1 tornado that snapped trees, destroyed outbuildings, damaged the Lake Cumberland Speedway, and rolled two manufactured homes near
Bronston, Kentucky, injuring two people. In
Mobile, Alabama, a high-end EF1 tornado destroyed a poorly built
Family Dollar store, and caused less severe damage to some other buildings and trees. An EF0 tornado touched down in
Perry, Florida, as well, peeling back the metal roof of a tavern in town and causing minor tree, fence, and house damage. Severe weather on May 6 forced the
MLB to postpone six baseball games, the most in a single day since
April 15, 2018. In all, 28 tornadoes touched down, causing at least three injuries.
May 9 (Indonesia) On May 9, a tornado moved through multiple villages in
Lebak Regency in
Indonesia, damaging 61 homes, some heavily. 15 homes were damaged in
Cisampih Village, 17 homes were damaged
Dederan Village, and 29 homes were damaged in
Lebaksiuh Market Village. An Islamic boarding school was damaged in Cisamph Village as well. No serious injuries or fatalities occurred.
May 12 (United States) On May 12, the SPC issued a moderate risk for the
Upper Midwest, from western
Minnesota and southeastern
North Dakota to northeastern
Nebraska and extreme northwestern
Iowa, including eastern
South Dakota. Conditions were favorable for a significant straight-line wind event, though a secondary threat of strong tornadoes was also present, and a 10% hatched tornado risk area was outlined as well. Two tornado watches were issued later that day, but the main watch was a
PDS severe thunderstorm watch that was issued across the area as well, indicating the possibility of tornadoes and severe wind gusts to . A strong
derecho developed over Nebraska and moved northeast, affecting parts of Iowa, Minnesota, and the Dakotas with destructive straight-line winds that exceeded in some areas, causing widespread damage to trees, power lines, buildings, and agriculture. Circulations embedded within and along the leading edge of the derecho produced numerous tornadoes, a few of which were strong. A high-end EF2 tornado caused major damage to a farm south of
Gary, South Dakota, ripping the roof and exterior walls off a house and injuring one person. A strong EF2 rope tornado hit
Castlewood, where homes sustained severe damage, a school building had much of its roof torn off, sheds and garages were destroyed, many trees and power poles were snapped, and one person was injured. Another EF2 tornado destroyed outbuildings and inflicted significant damage to a dairy farm near
Estelline, while an EF1 tornado damaged homes, trees, and a baseball field in
Madison, Minnesota. A low-end EF2 tornado snapped many trees and power poles in and around
Campbell, and heavily damaged large grain bins at a grain elevator in town. Another EF2 tornado caused damage to metal buildings and impacted
Verndale and
Blue Grass, where numerous trees and power poles were snapped, some of which landed on homes and vehicles. A high-end EF1 tornado also touched down in
Alexandria, where many trees were downed and homes sustained varying degrees of roof damage, a couple of which suffered partial to total roof loss. No tornado-related fatalities occurred, though at least three people were killed by straight-line winds. Overall, a total of 32 tornadoes were confirmed.
May 18–21 (United States and Canada) A period of sporadic tornadic activity affected the
Great Lakes, Upper
Mississippi Valley, and the
Mid-Atlantic beginning on May 18, when an EF0 tornado caused tree damage near
Rice Lake, Minnesota. On May 19, a long-tracked EF2 tornado touched down near
Keensburg, Illinois, before moving across the southeast side of
Mount Carmel, then crossing into
Indiana and striking
Decker. Countless large trees were snapped or uprooted along the path, many or which landed on structures, and power poles were also snapped. Barns were destroyed and pivot irrigation sprinklers were flipped in rural areas, and the tornado ended up crossing the
White River seven times before dissipating. An EF1 tornado downed trees in and around
Greenville, Illinois, destroying barns and damaging a few homes in areas outside of town as well. A few weak EF0 tornadoes also touched down in parts of the
St. Louis, Missouri metropolitan area, causing minor tree damage. On May 20, a destructive EF3 tornado swept through the city of
Gaylord, Michigan, killing two people and injuring 44 others. Many homes and businesses in Gaylord were severely damaged or destroyed, cars were tossed in parking lots, and RVs were thrown and demolished at a dealership. The two fatalities occurred at a mobile home park in town, where multiple mobile homes were completely destroyed. This tornado was the first to be rated EF3 in Michigan since
2012, and caused over 6,000 people to lose power. The Gaylord tornado caused $50 million in damage. Farther east, an EF0 tornado briefly touched down in
Aberdeen, New Jersey, downing trees and causing minor damage to some homes. On May 21, isolated weak tornadoes occurred across parts of Indiana and
Arkansas, resulting in marginal damage. However, a more significant severe weather event unfolded on May 21 farther north in
Canada, as a powerful and
deadly derecho with wind gusts of up to caused extensive damage across large areas of
Ontario and
Quebec, resulting in 11 fatalities from straight-line winds. The
London,
Ottawa,
Toronto,
Montreal, and
Quebec City metro areas all sustained significant impacts from the derecho, along with many other smaller cities and towns. The intense winds toppled many trees and power lines, damaged buildings, shattered windows, and caused massive power outages. The derecho produced four embedded
QLCS tornadoes, including two EF1 tornadoes that moved through parts of
London, Ontario, one of which touched down in the Huron Heights section of the city, snapping and uprooting trees, damaging the roof of an apartment building, and damaging hangars and small planes at an airport. The other EF1 tornado struck the Wilton Grove neighborhood, badly damaging a warehouse, bending a power pole, and downing trees. The third tornado spawned by the derecho was strong, producing EF2 damage in
Uxbridge, Ontario, where a brewery and a three-story apartment building were unroofed, cars were flipped, and many large trees were snapped or uprooted, some of which landed on structures and vehicles. Other apartment buildings, homes, and a church in town had large portions of their roofs ripped off, a train station was damaged, and many power lines were also downed. Another embedded EF2 tornado touched down east of
Lake Scugog and passed near the rural communities of
Janetville and
Yelverton, damaging or destroying multiple outbuildings, barns, and machine sheds. Numerous trees were snapped as the tornado impacted wooded areas. About 950,000 people in Canada lost power due to the derecho. Overall, a total of 25 tornadoes occurred. The severe weather resulted in two tornado-related fatalities, and an 11 additional fatalities from the derecho. Numerous injuries also occurred.
May 20 (Europe) A small tornado outbreak produced several tornadoes in multiple countries in Europe on May 20, including three strong F2 tornadoes that caused significant damage and numerous injuries in
Germany. In
Russia, a brief F0 tornado caused minor roof damage in
Ilovlya. In the
Netherlands, an F1 tornado struck
Beek, where homes sustained severe roof damage and garden sheds were destroyed. In Germany, one long-tracked supercell produced at least five tornadoes. The first was a strong F2 wedge tornado which touched down to the west of
Lippstadt in the German state of
North Rhine-Westphalia, first causing damage in the villages of
Eickelborn and
Benninghausen, where two medical clinic buildings were partially unroofed, a supermarket sustained roof damage, and trees were downed. Continuing to the east, the tornado reached peak intensity as it moved through a rural area, where a brick farm home had much of its roofing removed, and a large and well-built brick farm building was partially destroyed. A smaller outbuilding was completely destroyed, many large trees were snapped and uprooted, and a large masonry-construction church had its steeple torn off in this area as well. Continuing directly into Lippstadt, the tornado weakened, but caused roof damage to many homes, businesses, and a school, and downed numerous trees in the city before dissipating. Some large trees landed on vehicles and buildings, causing considerable damage. The Lippstadt tornado had a path length of , and did not result in any serious injuries. The second F2 tornado caused major damage as it tore directly through
Paderborn. Homes, churches, schools, businesses, and apartment buildings in the city sustained partial to total roof loss, including an apartment building that was unroofed and sustained partial failure of its top-floor exterior walls. An office building, a large furniture store, and a used car business were significantly damaged and had their roofs ripped off, and warehouses were also heavily damaged. Metal light poles were bent to the ground, while cars, trucks, and vehicle trailers were tossed and severely damaged, and other vehicles were damaged by flying debris. Numerous large trees were snapped or uprooted in Paderborn, and streets were left strewn with debris. The Paderborn tornado injured 43 people along its long path, including 13 serious injuries. The third tornado from the supercell, rated high-end F1, struck the towns of
Ovenhausen and
Lütmarsen, damaging dozens of trees and roofs along its path, and injuring two people. Many homes sustained heavy roof damage, a soccer field was damaged, and a large industrial building had its roof blown off. Trees were snapped, and outbuildings were damaged or destroyed in rural areas as well. A fourth tornado produced by the supercell, which was rated F2, touched down in a densely forested area near
Merxhausen, flattening large swaths of trees, with every tree in the direct path being snapped or uprooted in the most severely affected areas. The strong tornado then struck Merxhausen, where a large house and a masonry building had their roof structures completely destroyed, and a small summer home was also destroyed. Multiple other homes and buildings in town suffered major roof damage, including a few that had significant portions of their roofs torn off. The Merxhausen tornado remained on the ground for and reached a peak width of up to , resulting in one injury. The fifth and final tornado from this supercell received a low-end F1 rating after hitting the town of
Langelsheim. Along a long path, it caused roof damage to homes and uprooted or snapped trees. A frail brick-built garage partly collapsed as well. Another brief low-end F1 tornado also hit a suburban area in southwestern
Herford, causing roof and tree damage along its 0.65 kilomter (0.4 mi) long path. An F1 tornado downed numerous trees in wooded areas near
Abtsgmünd, and another rain-wrapped F1 tornado downed additional trees and caused slight roof damage in
Hillscheid. A total of 10 tornadoes were confirmed as a result of this outbreak, which resulted in 46 injuries.
May 26–27 (Eastern United States) On May 26, scattered tornadoes occurred in various states across the
Eastern United States, most of which were weak. However, a low-end EF2 tornado snapped or uprooted numerous trees near
Union Grove, North Carolina, and caused roof damage to a few structures. An EF1 tornado near
Greenup, Kentucky, tore a section of roof off a house and destroyed its adjacent garage. Additional tornadoes touched down along the
East Coast the following day, including a high-end EF2 tornado that caused significant damage near
Norwood, Virginia in
Bedford County, destroying a site-built house, two mobile homes, and several outbuildings. The tornado snapped or uprooted numerous trees, and two people were injured. An EF1 tornado touched down in
Kirkwood, Pennsylvania, and moved into rural areas outside of town, damaging a house, destroying barns and outbuildings, downing trees, and injuring three people. Another EF1 tornado struck areas in and around
Charlotte Hall, Maryland and downed dozens of trees, including some that landed on and caused damage to two homes. As one severe storm passed close to
Washington D.C., a
Major League Baseball game between the
Colorado Rockies and
Washington Nationals was postponed. EF0 tornadoes caused minor damage in
Olney, Maryland, and
Loris, South Carolina. A total of 20 tornadoes were confirmed, along with at least five injuries. ==June==