Tornadoes are destructive forces of nature that can form rapidly and devastate towns and communities but with proper education and preparation, the damage can be minimal. Tornadoes are defined as “a violently rotating, tall, narrow column of air (that is, a vortex), typically about 300 ft. (100m) in diameter, that extends to the ground from a cumulonimbus cloud” (Davies-Jones 1). Tornadoes are notorious for forming in the central part of the United States, and most of them do, but they can form also form in many other parts of the world including Russia, China, South Africa, and Australia.
Tornadoes form from systems that have large scale patterns of circulation and are associated with violent thunderstorms which are filled with cumulonimbus clouds. It was once thought that they formed when warm moist air collided with cold dry air which was accepted because many form during the spring, but it is actually not accurate. “The most destructive and deadly tornadoes occur from supercells—which are rotating thunderstorms with a well-defined radar circulation called a mesocyclone” (Edwards 1). Temperature actually has little to do with how tornadoes form. Formation of tornadoes depends mainly on instability, updraft of wind, and moisture in the air. Severe thunderstorms that have green skies, heavy winds, and large diameter hail can form tornadoes but they don’t always do. Some can form over water but they are called waterspouts. There have been many tropical storms and hurricanes that have formed tornadoes in the recent past that have caused hundreds of millions of dollars in damage in conjunction with the flooding and high winds hurricanes already produce. Hurricane Danny in 1985 and Hurricane Ivan in 2004 produced many tor...
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...a list of items that could pose a problem should a tornado damage the building. Families should also have a plan to keep themselves safe. After a tornado strikes an area, there are hazards that people need to be aware of including downed electrical lines, debris from buildings and other structures, and potential for more storms. The desire for a lot of people to go back to their homes is expected but discouraged because it can interfere with rescue operations and damage control operations including restoration of utilities and cleaning up possible hazardous spills. It is important for people to monitor emergency information from radios and television stations so that they can be aware of these hazards. The aftermath of tornadoes also creates hazards of dehydration and heat injuries because of the lack of fresh water supplies and electricity to keep areas cool.
According to Webster’s Dictionary, a tornado is a rotating column of air accompanied by a funnel shaped downward extension of a cumulonimbus cloud and having a vortex several hundred yards in diameter whirling destructively at speeds of up to three hundred miles per hour. There are six classifications of tornadoes, which are measured on what is known as the Fujita Scale. These tornadoes range from an F0 to an F5, which is the most devastating of all. Abnormal warm, humid, and oppressive weather usually precede the formation of a tornado. Records of American tornadoes date back to 1804 and have been known to occur in every state of the United States.
Tornadoes are “violent windstorms that take the form of a rotating column of air or vortex that extends downward from a cumulonimbus cloud” as Tarbuck and Lutgens (2012) explain.
Tornadoes, also called twisters or cyclones, are a localized, violently destructive windstorm occurring over land, and characterized by a long, funnel-shaped cloud extending toward the ground and made visible by condensation and debris. They come in many different shapes and sizes, but are typical in a funnel formation, where the narrow end makes contact with the earth. Most don’t reach winds over 110 miles per hour (177 km/h) or have a path wider than 250 feet (76m), and most only travel a few miles on ground before dissipating. Although, some can reach winds as high as 300 miles per hour (483 km/h) or higher, have a path that can be as wide as two miles (3.2 km) or more, and can travel for dozens of miles on the ground before dissipating.
National Oceanic and Atmospheric Administration (NOAA)/National Climatic Data Center (NCDC), (2001). U.S. Tornado Climatology. Accessed on 9//27/2011 at http://www.ncdc.noaa.gov/oa/climate/severeweather/tornadoes.html#deadly
1. According to the USA Today Tornado Information website, a tornado is a "violently rotating column of air in contact with the ground and pendant from a thunderstorm." Therefore, thunderstorms are the first step in the creation of a tornado.
I would like to start out by what we know about tornados and outbreaks, and what is said to be the cause of such catastrophic events, such as the outbreak that occurred November 17th in the Midwestern, portion of the United States. Tornado outbreaks occur when there are multiple tornados that are said to be produced by the same weather system. The classification of an outbreak can vary depending on interpretation. It is said that in order to be classified as a “tornado outbreak” there must be a certain number of tornados that touch down. It is said that the US has the most tornados of any country. This can be attributed the location with in the mid latitude. The Rocky Mountains, have the ability to block moisture and “buckle” the atmospheric flow; thus forcing a lot of dry air at mid-levels of the troposphere, due to downslope winds. While the Rockies are forming a “dry-line” the Gulf of Mexico on the other hand contributes a lot of low level moisture. This mixture of warm air and cold air is to blame for the large number of tornados that form in the US. These events are most prevalent in the Midwestern and Southeastern United States, along with the Great Plains also known as (tornado alley) although some of these systems have been known to move as far North as Canada. The tornado outbreak that took place on the 17th of November is said to have been the one of the largest outbreaks to have occurred in eight years. This particular storm spawned a total of 72 tornados that swept through seven states, according to the National Weather Service. This outbreak is being considered the fourth largest outbreak of its kind, especially this time of year.
Tornadoes are devastating atmospheric events that affect the ecology and the lives of people in their paths. Tornadoes are defined as “a violently rotating column of air, in contact with the ground, either pendant from a cumuliform cloud or underneath a cumuliform cloud, and often (but not always) visible as a funnel cloud” (Glossary of Meterology, 2011). The Tri-state tornado was the most deadly tornado in the United States. It stayed on the ground for a total of 219 miles through areas of Missouri, Illinois, and Indiana, killed a total of 695 people, and an estimated $16.5 million in damages (National Weather Service, 2011). Luckily, the tornado’s path was largely rural farmland with scattered small towns between them.
On May 22nd, 2011 a massive tornado hit Joplin, Missouri killing 162 people and injuring 1150. With wind speeds of 322km/h, the tornado made a total cost of over $2 billion for the city. 8000 structures were destroyed, 2000 of which were homes. Many people were left homeless. The tornado held an incredible EF5 rating on the Fujita scale, measured from the amount of destruction. The tragic event lasted 38 minutes, from 5:34 pm to 6:12pm. Cool wind from the Rockies in Canada and warm wind from the gulf of Mexico formed into a supercell thunderstorm creating a tornado in Kansas. The tornado rapidly moved into Joplin and continued on its 35 km path.
A tornado struck Joplin, Missouri on May 22, 2011 at around 5:40 pm. With a population around 50,559, it killed 161 people and injured approximately 1,100 people. The cost was an estimated $2.8 billion in damage. The American taxpayers had to give about $500 million in recovery money. This made it the deadliest tornado since 1950, which was when modern recordkeeping began. Since it was an EF5 tornado, it destroyed everything in its path. The city was ruined with only piles of debris left. It was a half-mile wide when it hit Joplin and grew to three-quarters of a mile wide. It destroyed nearly 7,000 homes in Joplin and damaged hundreds more. It covered over 1,800 acres of land. The warnings that the Joplin residents received were through three different ways. The tornado warning that was sent out for Joplin’s county was from Jasper County Emergency Operations Center (JCEOC) and they claim that the first siren went off at 5:11 pm. Two other warnings for the Joplin residents was they saw the tornado heading their direction, and the media coverage which was all local electronic media switched to wall-to-wall coverage seeing live footage of the tornado.
Tornadoes are one of the deadliest and most unpredictable villains mankind will ever face. There is no rhyme or reason, no rhythm to it’s madness. Tornados are one of the most terrifying natural events that occur, destroying homes and ending lives every year. April 29th, 1995, a calm, muggy, spring night I may never forget. Jason, a buddy I grew up with, just agreed to travel across state with me so we could visit a friend in Lubbock. Jason and I were admiring the beautiful blue bonnets, which traveled for miles like little blue birds flying close to the ground. The warm breeze brushed across the tips of the blue bonnets and allowed them to dance under the perfectly clear blue sky. In the distance, however, we could see darkness. A rumbling sky was quickly approaching.
A tornado requires some basic ingredients to come together. First, energy in the form of warm, moist air must exist to feed thunder storms. Second, there must be a top layer of hot, dry air called a cap. This air acts like a lid on a simmering pot, holding in the warm air that’s accumulating in the atmosphere below until the storm’s ready to burst. Last, there has to be rotating winds speeding in oppositedirections at two different levels in the atmosphere, a phenomenon called wind shear, can cause the storms to rotate. Tornado alley is perfectly situated to meet these requirements. (1)
Once the storm arrives, stay inside and away from walls and windows that could collapse or be blown away. If it is during the night, have a flashlight near-by so that you can find your way around in case of a power failure. Don’t use the telephone either unless it’s absolutely necessary. Many people may be trying to make emergency calls and the phone lines may be knocked down in some areas.
A tropical cyclone is a warm-core, low-pressure system producing high winds that spiral counter-clockwise (in the northern hemisphere) and inward, with the highest winds near the center of circulation. The large counter-clockwise and inward flow is characteristic of the nearly symmetric structure of tropical cyclones as they are comprised of rain bands spiraling toward the center. These warm-core storms typically form over the tropical and subtropical oceans and extract their energy from the heat content of the oceans.
Other than the sweltering heat in the summer time in Oklahoma City, the only dilemma are tornadoes. I grew up in the middle of this “tornado alley” and eventually developed a sixth sense for detecting tornadic activity. Even in the 1980’s tornadoes were known for their violent crime wave, vandalizing neighborhoods and kidnapping children and adults. Imagine a beautiful evening in Moore, a suburb lying on the outskirts of Oklahoma City. Mom is in the kitchen and the kids are playing in the yard. In a matter of minutes, the sky turns green and large cumulonimbus clouds start to churn. A crackle of thunder sends a chill up your spine, followed by a strong odor of ozone that fills the air as Mother Nature’s fireworks illuminate the dark sky. Large golf ball sized hail sting your window and a melody of car alarms play in the streets. You panic as the lights inside your house start to flicker as the tornado touches down and it is reported as an F-5, the largest of all the tornadoes, tearing through houses with awe-inspiring velocity. The tornado engorges cars, trees, and small houses as it approaches your house. Being prepared, you descend to the storm cellar and brace yourself for the full impact of the unforgiving monster. The tornado has left its calling card on your block. A scrap of metal and glass resembling your car is found on your next door neighbor’s lawn. The houses on your block have vanished, leaving behind a scene of ultimate destruction. Families stand outside telling stories of how their child was stripped right out of their hands as the behemoth rampaged through their houses.
A tornado is defined as a violently rotating column extending from a thunderstorm to the ground. The most violent tornadoes are capable of tremendous destruction with wind speeds of two hundred and fifty miles per hour or more. Damage paths can be more than one mile wide and fifty miles long. In an average year, eight hundred tornadoes are reported nationwide, resulting in eighty deaths and over one thousand five hundred injuries. In the body of my essay, I will tell you about types of tornadoes, where tornadoes come from, where and when tornadoes occur, the damage they inflict, variations of tornadoes, and how to detect tornadoes.