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On March 18, 1925, one of the deadliest tornado outbreaks in recorded history generated at least 12 significant tornadoes and spanned a large portion of the midwestern and southern United States. In all, at least 751 men, women and children were killed and more than 2,298 were injured, making the outbreak the deadliest tornado outbreak in U.S. history. The outbreak generated several destructive tornadoes in Missouri, Illinois, and Indiana on the same day, as well as significant tornadoes in Alabama and Kansas. In addition to confirmed tornadoes, there were undoubtedly others with lesser impacts, the occurrences of which have been lost to history.
These are some notable tornadoes, tornado outbreaks, and tornado outbreak sequences that have occurred around the globe.
- Exact death and injury counts are not possible; especially for large events and events before 1955.
- Prior to 1950 in the United States, only significant tornadoes are listed for the number of tornadoes in outbreaks.
- Due to increasing detection, particularly in the U.S., numbers of counted tornadoes have increased markedly in recent decades although the number of actual tornadoes and counted significant tornadoes has not. In older events, the number of tornadoes officially counted is likely underestimated.
Hurricane Agnes was the costliest hurricane to hit the United States at the time, causing an estimated $2.1 billion in damage. The hurricane's death toll was 128. The effects of Agnes were widespread, from the Caribbean to Canada, with much of the east coast of the United States affected. Damage was heaviest in Pennsylvania, where Agnes was the state's wettest tropical cyclone. Due to the significant effects, the name Agnes was retired in the spring of 1973.
Hurricane Cindy was a tropical cyclone that made landfall in the U.S. state of Louisiana in July 2005. The third named storm of the 2005 Atlantic hurricane season, Cindy developed from a tropical wave on July 3, off the east coast of Mexico's Yucatán Peninsula. Soon after, it moved over land before emerging into the Gulf of Mexico. Cindy tracked toward the northern Gulf Coast and strengthened to reach maximum sustained winds of 75 mph (120 km/h), making it a Category 1 on the Saffir–Simpson scale. The hurricane struck near Grand Isle, Louisiana, on July 5 at peak intensity, but weakened by the time it made a second landfall along southern Mississippi. Cindy weakened over the southeastern United States and transitioned into an extratropical cyclone as it merged with a cold front on July 7. The remnants of Cindy produced an outbreak of 42 tornadoes across six states. Eventually, the remnants of Cindy moved into Atlantic Canada, dissipating on July 13 over the Gulf of St. Lawrence.
Tropical Storm Bill was a tropical storm that affected the Gulf Coast of the United States in the summer of 2003. The second storm of the 2003 Atlantic hurricane season, Bill developed from a tropical wave on June 29 to the north of the Yucatán Peninsula. It slowly organized as it moved northward, and reached a peak of 60 miles per hour (97 km/h) shortly before making landfall in south-central Louisiana. Bill quickly weakened over land, and as it accelerated to the northeast, moisture from the storm, combined with cold air from an approaching cold front, produced an outbreak of 34 tornadoes. Bill became extratropical on July 2, and was absorbed by the cold front later that day.
Hurricane Bob was the first of six hurricanes to strike the United States during the 1985 Atlantic hurricane season. The second tropical storm and first hurricane of the year, Bob developed from a tropical wave on July 21 in the eastern Gulf of Mexico. Bob began moving east, making landfall southwestern Florida as a weak tropical storm. The storm then turned to the north and quickly intensified to hurricane status on July 24. The next day, it made landfall near Beaufort, South Carolina, becoming one of a record-tying six hurricanes to hit the United States during a single season. Bob quickly weakened over land, and was absorbed by a frontal trough over eastern West Virginia on July 26.
The Hurricane Ivan tornado outbreak was a three-day tornado outbreak that was associated with the passage of Hurricane Ivan across the Southern United States starting on September 15, 2004, across the Gulf Coast states of Alabama and Florida as well as southern Georgia before ending in the Middle Atlantic Coast on September 18.
The Hurricane Frances tornado outbreak was a widespread tornado outbreak associated with Hurricane Frances that came ashore on eastern Florida on September 4–5, 2004. Outer bands from the hurricane and its remnants, when it moved across the Appalachian Mountains, produced one of the largest tornado outbreaks ever spawned by a tropical cyclone in the United States in terms of number of tornadoes confirmed since records were kept in 1950. In addition, it was the largest tornado outbreak in South Carolina history, with nearly half of the tornadoes in that state.
Tropical Storm Becky was the second tropical cyclone and named storm of the 1970 Atlantic hurricane season. Becky formed from a tropical depression that was designated on July 19. The next day it organized over the Yucatán Channel and became Tropical Storm Becky. Initially thought to have attained minimal hurricane status, Becky reached peak winds of 65 mph (100 km/h), but the storm began to deteriorate shortly thereafter. The storm made landfall on the Florida Panhandle on July 22, and rapidly weakened over land. Overall, damage was related to heavy rainfall that caused flooding in Tallahassee, Florida; 104 families suffered flood-related losses. About $500,000 in damage was attributed to the storm. Further north, the heavy rainfall swelled rivers. Becky may have been partially responsible for spawning tornadoes that destroyed or damaged several houses.
On June 18–19, 1972, Hurricane Agnes generated the third-deadliest tropical cyclone-related tornado outbreak in the United States since 1900, as well as the deadliest such tornado outbreak on record in Florida. The outbreak lasted about 38 hours and produced at least 19 confirmed tornadoes, though some studies suggested nearly a dozen more. Two of the tornadoes killed a total of seven people and were not classified as tornadoes by the National Weather Service until 2018. In Florida alone, the outbreak inflicted at least 135 injuries and destroyed 15 homes, while 119 homes received damage. Statewide, 217 trailers were destroyed and 196 trailers incurred damage. Additionally, six businesses were destroyed, while six others were damaged.
The Hurricane Rita tornado outbreak was a significant tropical cyclone-produced tornado outbreak and severe weather event that resulted from the remnants of Hurricane Rita in late-September 2005. The event was the fourth-largest tornado outbreak caused by a tropical cyclone in recorded history. After the hurricane made landfall on the extreme southwestern coast of Louisiana on September 24, the tropical cyclone's strong rainbands affected much of the West South Central and East South Central States, producing heavy rainfall in addition to numerous tornadoes. Tornadic activity was distributed roughly evenly from September 24–25, though activity shifted slightly eastward on September 25. The severe activity ended by September 26, by which time the remnants of Hurricane Rita were absorbed by a frontal boundary.
Tropical Storm Nestor was a large but short-lived and disorganized tropical cyclone which caused widespread tornadoes and heavy rain in the Southeastern United States during mid-October 2019. The sixteenth depression and fourteenth named storm of the erratic 2019 Atlantic hurricane season, Nestor originated from a broad area of low pressure over the Western Caribbean. It emerged in the Gulf of Mexico and began to organize slightly, becoming Potential Tropical Cyclone Sixteen due to its threat to the Southeastern United States. It gained sufficient circulation to be designated Tropical Storm Nestor near the Florida Panhandle early on October 18, crawling to the northeast, and then finally transitioning into an extratropical cyclone due to strong shear from a nearby upper-level low before making landfall on the Florida Panhandle on October 19.
Hurricane Isaias was a destructive tropical cyclone that caused extensive damage across the Caribbean and the East Coast of the United States while also spawning the strongest tropical cyclone-spawned tornado since Hurricane Rita in 2005. The ninth named storm and second hurricane of the extremely active and record-breaking 2020 Atlantic hurricane season, Isaias originated from a vigorous tropical wave off the coast of Africa that was first identified by the National Hurricane Center on July 23. The tropical wave gradually became more organized and obtained gale-force winds on July 28 before organizing into Tropical Storm Isaias on July 30. Isaias marked the earliest ninth named storm on record, surpassing 2005's Hurricane Irene by eight days. Isaias strengthened into a Category 1 hurricane on the next day, reaching an initial peak of 85 mph (140 km/h), with a minimum central pressure of 987 mbar. On August 1, the storm made landfall on North Andros, Bahamas and subsequently weakened to a tropical storm, before paralleling the east coast of Florida and Georgia. As Isaias approached the Carolina coastline, it reintensified back into a hurricane. Soon afterward, Isaias reached its peak intensity, with maximum 1-minute sustained winds of 90 mph (150 km/h) and a minimum central pressure of 986 millibars (29.1 inHg), before making landfall near Ocean Isle Beach, North Carolina, at 03:10 UTC on August 4, at the same intensity. The storm proceeded to accelerate up the East Coast of the United States as a strong tropical storm, before transitioning into an extratropical cyclone over Quebec on August 4. Isaias's extratropical remnants persisted for another day, before dissipating on August 5.
The following is a list of weather events that occurred on Earth in the year 2022. The year began with a La Niña. There were several natural disasters around the world from various types of weather, including blizzards, cold waves, droughts, heat waves, wildfires, floods, tornadoes, and tropical cyclones. The deadliest weather event of the year were the European heat waves, which killed over 26,000 people, 11,000 of which were in France. The costliest weather event of the year was Hurricane Ian, which caused at least $112.9 billion in damages in Florida and Cuba. Another significant weather event was the Pakistan floods, which killed 1,739 people and a total of $14.9 billion in damages.
The following is a list of weather events that occurred in 2018.
The following is a list of weather events that occurred in 2011. The year began with La Niña conditions. There were several natural disasters around the world from various types of weather, including blizzards, cold waves, droughts, heat waves, tornadoes, and tropical cyclones.