At some locations along the tornado's path it was as much as two miles wide, making it one of the largest tornadoes in U. This tornado struck just a few years before the modern warning system was established. Tupelo, Mississippi, was the worst affected, with killed by an F5 twister on April 5.
Gainesville, Georgia, saw lives lost the following day when a F4 tornado struck the city. The fourth-deadliest F5 tornado was that which devastated Joplin, Missouri, on May 22, , killing An additional three to eight fatalities occurred indirectly as a result of the storm, according to various sources.
This was the first tornado of any intensity to kill more than people since the Flint, Michigan, twister of June 8, , when perished another F5 event and the seventh-deadliest single tornado in U. The small town was crowded with people from out of town viewing a circus event. If not for that unfortunate circumstance, the death toll would likely have been much lower.
Stay away from windows! Get out of large auditoriums or large warehouses. Mobile homes are not safe during tornadoes or severe winds nearly 40 percent of all tornado-related deaths come from residents of mobile homes.
Do not seek shelter in a hallway or bathroom of a mobile home. If you have access to a sturdy shelter or a vehicle, abandon your mobile home immediately. If you are caught outdoors, seek shelter in a basement, shelter, or sturdy building. If you cannot quickly walk to a shelter: Immediately get into a vehicle, buckle your seat belt and try to drive to the closest sturdy shelter. If flying debris occurs while your are driving, pull over and park. Now you have the following options as a last resort: Stay in the car with the seat belt on.
Put your head down below the windows, covering with your hands or a blanket if possible. If you can safely get noticeably lower than the level of the roadway, exit your car and lie in that area, covering your head with your hands. Never drive directly toward a tornado or in the vicinity of a tornado. Any tornado can change direction or speed quickly and put you at risk. Drive at right angles away from the tornado or get out of your vehicle and seek shelter immediately.
Highway over-passes are not necessarily the safest outdoor place to be. People have been killed while hiding underneath an over-pass as a tornado moved overhead. Instead, seek a sturdy shelter or lie flat on the ground and cover your head with your arms. The most expensive included the August 10 Midwest derecho straight line winds.
Includes Puerto Rico and the U. Virgin Islands. Subject to change as loss estimates are further developed. As of February 23, A tornado that crosses state lines is counted as a single event in this chart. View Archived Graphs The following chart shows the top 10 catastrophes involving tornadoes. It counts severe convective storms that may include tornadoes and other perils such as straight-line winds derechos and hail. The August 10, , Midwest Derecho, which is included in the chart as part of the August , outbreak, would rank as the fourth-costliest insured severe convective storm event on record for the U.
Includes events that occurred through Consumer Price Index. The tangential winds far exceed the radial inflow or the vertical motion, and can cause much damage. Hurricanes always rotate counterclockwise in the northern hemisphere clockwise in the southern , the direction of their rotation being determined by the Earth's rotation. This is almost always true of tornadoes too, although on rare occasions "anticyclonic" tornadoes spinning in the opposite direction do occur tornadic circulation is determined by the local winds.
This is where the similarities end. The most obvious difference between tornadoes and hurricanes is that they have drastically different scales. They form under different circumstances and have different impacts on the environment. Tornadoes are "small-scale circulations", the largest observed horizontal dimensions in the most severe cases being on the order of 1 to 1. They most often form in association with severe thunderstorms which develop in the high wind-shear environment of the Central Plains during spring and early summer, when the large-scale wind flow provides favorable conditions for the sometimes violent clash between the moist warm air from the Gulf of Mexico with the cold dry continental air coming from the northwest.
However, tornadoes can form in many different circumstances and places around the globe.
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