May 2–4 (Europe) A severe weather outbreak produced scattered tornadoes across
Europe from May 2–4, producing a total of 14 tornadoes across several countries. On May 2, conditions in
Iberia, namely a
cold front pulling warm, moist air from the
Mediterranean into an unstable environment with high wind shear, allowed for the development of long-lasting
supercells. Two tornadoes touched down in eastern
Portugal: one IF1.5 tornado near
Beja caused significant roof damage Remnants of this system continued to create a risk of severe weather in Portugal the next day, as a waterspout moved ashore off the coast of
Sesimbra and a large IF1 tornado tracked through
Sardoal in central Portugal.
May 8 (China) An EF1 tornado struck
Qidong County in
Hengyang,
Hunan Province. Two people were killed when their house collapsed, and several more were injured. Six houses collapsed and more than 100 were damaged.
May 8–9 (Brazil) On May 8, two tornadoes touched down in
Rio Grande do Sul. The next day, a wide tornado struck
Erval Grande, being officially rated an EF2 by the
PREVOTS group. The event lasted about 15 minutes, damaging around 285 homes, displacing 55 families, and overall affecting over 1,000 people. The storm also wrecked power lines and blocked roads with fallen trees. The mayor declared a state of emergency, and relief efforts provided shelter and supplies. Additionally, a tornado struck
Palmitos in
Santa Catarina, killing one man when a tree hit him.
May 15–16 (United States) swept away at high-end EF4 intensity.A significant tornado outbreak produced 61 tornadoes in portions of the
Midwestern and
Southeastern United States on May 15–16 due to a negatively tilted mid-level atmospheric
trough that moved through the
Upper Midwest. On May 15, tornadic activity was centered on the Great Lakes Region with 31 tornadoes touching down throughout the day. An EF2 tornado damaged several structures near
Colby, Wisconsin. One supercell thunderstorm produced six tornadoes, including an EF2 tornado that injured one person as it passed through
Juneau, and another EF2 tornado that struck
Mayville. Four more tornadoes touched down from this initial round of storms after midnight as well. An early afternoon
EF3 tornado struck the
Greater St. Louis area, causing widespread destruction to trees, power lines, homes, traffic lights, and other structures, killing four people, and injuring 38 others. The tornado was be one of the costliest tornadoes in US history, with monetary damage estimated at $1.6 billion
USD. Another deadly EF3 tornado destroyed homes and mobile homes and killed two more people near
Blodgett, Missouri. A stray high-end EF1 tornado also caused considerable damage in
Baltimore, Maryland. A violent high-end
EF4 tornado injured seven people and prompted the issuance of a
tornado emergency for the
Marion, Illinois area. A strong EF2 tornado in
Linton killed one person. In
Kentucky, an EF3 tornado caused intense damage in the
Morganfield area, and a
destructive EF4 tornado struck the cities of
Somerset and
London, killing 19 people. Overall, 26 tornadic fatalities occurred as a result of this tornado outbreak.
May 18–21 (United States) . Another powerful trough ejection, coupled with deep moisture return from the
Gulf of Mexico, prompted another damaging tornado outbreak, moving from the Southern
Great Plains towards the
Southeast. Numerous tornadoes touched down, several of which were strong to intense. On the May 18, an EF3 tornado caused severe damage in the town of
Grinnell, Kansas across its long path, After dark, a powerful, cyclic
supercell developed in south-central
Kansas, eventually producing a long
family of eight tornadoes, five of which were rated EF3. Two of these prompted
tornado emergencies: one as it approached the towns of
Greensburg and
Brenham, and another that directly hit the small town of
Plevna. and in the evening, another tornado emergency was issued for an EF2 tornado that went through
Madison, Alabama, dissipating just before reaching
Huntsville. The storm impacted 150–250 homes, a supermarket, and infrastructure, including power lines, resulting in over 10,000 households losing electricity.
May 29–30 (United States) . A small tornado event, which produced 18 tornadoes over two days, took place mainly across the
Southeastern United States on May 29–30. On May 29, a strong EF2 tornado struck
Locust Grove, Georgia. Two people were thrown from their house as the tornado demolished their home, injuring both, one critically. The tornado was then caught on video crossing
I-75. In addition, three rare tornadoes touched down in the
Western United States, two of these in
Utah, specifically in
Herriman and
Logan. The third tornado affected
Loving, New Mexico, all three of these tornadoes were rated EFU. Early the following morning, a strong EF2 tornado struck in rural
Washington County, Kentucky. Several homes, mobile homes, and outbuildings were heavily damaged or destroyed by the tornado, which killed one person and injured 14 others. In addition, an unwarned EF0 tornado rolled campers, damaged homes and barns, and injured five people southwest of
Loudon, Tennessee. ==June==