 An outline of Significant Tornado Alley in the United States, where the highest percentage of violent tornadoes occur Tornado Alley is a colloquial term most often used in reference to the area of the United States in which tornadoes are most frequent. Although an official location of the term is not defined, the areas in between the Rocky Mountains and Appalachian Mountains are the areas usually associated with it. Image File history File links No higher resolution available. ...
Image File history File links No higher resolution available. ...
A tornado in central Oklahoma. ...
For individual mountains named Rocky Mountain, see Rocky Mountain (disambiguation). ...
Appalachians in North Carolina The Appalachian Mountains (French: les Appalaches) are a vast system of mountains in eastern North America. ...
Tornado geography
Although no state is entirely free of tornadoes, they are most frequent in the Plains area between the Rocky and Appalachian Mountains and in the state of Florida. The state where twisters most commonly occur is Texas.[1] When land area is taken into account, however, Florida has the highest density of tornado occurrence in the country.[2] However nearly all of Florida's tornadoes are weak, short lived and not produced by supercell thunderstorms; Oklahoma has the highest occurrence of such "classic" supercelluar tornadoes. In contrast, the Northeast and West tend to be the least tornado-prone regions in the United States. Federal courts Supreme Court Circuit Courts of Appeal District Courts Elections Presidential elections Midterm elections Political Parties Democratic Republican Third parties State & Local government Governors Legislatures (List) State Courts Local Government Other countries Atlas Politics Portal A U.S. state is any one of the fifty subnational entities of the...
The Great Plains covers much of the central United States, portions of Canada and Mexico. ...
Official language(s) English Capital Tallahassee Largest city Jacksonville Largest metro area Miami Area Ranked 22nd - Total 65,795[1] sq mi (170,304[1] km²) - Width 361 miles (582 km) - Length 447 miles (721 km) - % water 17. ...
Official language(s) No official language See languages of Texas Capital Austin Largest city Houston Largest metro area Dallas–Fort Worth Metroplex Area Ranked 2nd - Total 261,797 sq mi (678,051 km²) - Width 773 miles (1,244 km) - Length 790 miles (1,270 km) - % water 2. ...
Official language(s) English Capital Tallahassee Largest city Jacksonville Largest metro area Miami Area Ranked 22nd - Total 65,795[1] sq mi (170,304[1] km²) - Width 361 miles (582 km) - Length 447 miles (721 km) - % water 17. ...
Satellite view of a supercell A supercell is a severe thunderstorm with a deep rotating updraft (a mesocyclone) [1]. Supercell thunderstorms are the largest, most severe class of single-cell thunderstorms. ...
Official language(s) None Capital Oklahoma City Largest city Oklahoma City Area Ranked 20th - Total 69,898 sq mi (181,196 km²) - Width 230 miles (370 km) - Length 298 miles (480 km) - % water 1. ...
Regional definitions vary from source to source. ...
This article or section does not cite its references or sources. ...
Definition
Tornado activity in the United States. Although Tornado Alley is generally considered to be in the areas of the Central United States, no official definition of the term has actually been produced by the National Weather Service. There are several ideas of what tornado alley is, but those ideas are the result of the different criteria used to come up with them. Image File history File links Tornado_Alley. ...
Image File history File links Tornado_Alley. ...
The Central United States is a bridge region between the Eastern United States and Western United States. ...
The National Weather Service (NWS) is one of the six scientific agencies that make up the National Oceanic and Atmospheric Administration (NOAA) of the United States government. ...
Significant Tornado Alley la la la Perhaps the most common definition of tornado alley is the location of where the strongest tornadoes occur most frequently. In the United States that location is from Northern Texas, northward through Oklahoma, Kansas, Missouri, Nebraska and into South Dakota. Official language(s) None Capital Oklahoma City Largest city Oklahoma City Area Ranked 20th - Total 69,898 sq mi (181,196 km²) - Width 230 miles (370 km) - Length 298 miles (480 km) - % water 1. ...
This article needs additional references or sources for verification. ...
Official language(s) English Capital Jefferson City Largest city Kansas City Largest metro area St Louis[1] Area Ranked 21st - Total 69,709 sq mi (180,693 km²) - Width 240 miles (385 km) - Length 300 miles (480 km) - % water 1. ...
Official language(s) English Capital Lincoln Largest city Omaha Largest metro area Omaha Area Ranked 16th - Total 77,421 sq mi (200,520 km²) - Width 210 miles (340 km) - Length 430 miles (690 km) - % water 0. ...
Official language(s) English Capital Pierre Largest city Sioux Falls Area Ranked 17th - Total 77,163 sq mi (199,905 km²) - Width 210 miles (340 km) - Length 380 miles (610 km) - % water 1. ...
Other areas experience many strong tornadoes, but where strong tornadoes in the aforementioned area accrue more steadily, strong tornadoes in the Mississippi and Ohio Valleys and the Southeast occur less frequently but tend to surge in large outbreaks. While there is no single agreed upon definition, generally more than six tornadoes in a day in the same region is considered a tornado outbreak. ...
Other criteria Another criteria for determining tornado alley is to not focus on just the strongest tornadoes, but the location of where tornadoes happen more frequently relative to other places in the county. When using this method tornado alley has a much wider reaching grasp. In addition to Significant Tornado Alley, this area can include the great lowland areas of the Mississippi, Ohio and lower Missouri River Valleys, as well as the Southeast into Florida. For the river in Canada, see Mississippi River (Ontario). ...
Cincinnati, Ohio is a well known city along the Ohio River, historically known for its riverboats. ...
The Missouri River is a tributary of the Mississippi River in the United States. ...
This article is 88 kilobytes or more in size. ...
Time of year Also to be considered is the time of year. The highest frequency of tornadoes, commonly (but incorrectly) called "tornado season", shifts geographically depending on the season. During the winter months the Southeastern United States receives the highest number of tornadoes. During the months of March - May the threat shifts into the central United States. Then during the summer months the highest concentration of tornadoes tends to shift farther north as the weather warms across the U.S. Technically speaking, however, the central plains may be considered part of the tornado alley almost all-year-round, since this is where "temperature swings" between warm and cold air are most common. Winter is one of the four seasons of temperate zones. ...
Regional definitions vary from source to source. ...
The Central United States is a bridge region between the Eastern United States and Western United States. ...
Variations The nickname Dixie Alley is sometimes used for the areas in the southern US - notably the lower Mississippi Valley and the upper Tennessee Valley - which are particularly vulnerable to strong/violent tornadoes. More people have been killed by tornadoes in this particular region than those of the great plains because of the higher population density in the southeastern U.S. "Dixie Alley" is used extensively by The Weather Channel.[3] For the Australian Weather Channel with the same name, see The Weather Channel, Australia The Weather Channel (TWC) is a cable and satellite television network that broadcasts weather and weather-related news 24 hours a day. ...
Impact In the heart of tornado alley, building codes are often stricter than those for other parts of the U.S., requiring strengthened roofs and more secure connections between the building and its foundation. Other common precautionary measures include the construction of storm cellars, and the installation of tornado sirens. Tornado awareness and media weather coverage are also high. A building code, or building control, is a set of rules that specify the minimum acceptable level of safety for constructed objects such as buildings and nonbuilding structures. ...
A foundation is a structure that transmits loads from a building or road to the underlying ground. ...
Categories: Stub ...
Thunderbolt 1000/1000T Civil Defense siren. ...
References The Storm Prediction Center, located in Norman, Oklahoma, is part of the National Centers for Environmental Prediction (NCEP), operating under the control of the National Weather Service, which in turn is part of the National Oceanic and Atmospheric Administration (NOAA) of the U.S. government. ...
Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era. ...
is the 116th day of the year (117th in leap years) in the Gregorian calendar. ...
The U.S. National Climatic Data Center (NCDC) in Asheville, North Carolina is the worlds largest active archive of weather data. ...
January 29 is the 29th day of the year in the Gregorian calendar. ...
Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era. ...
Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era. ...
is the 116th day of the year (117th in leap years) in the Gregorian calendar. ...
Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era. ...
is the 116th day of the year (117th in leap years) in the Gregorian calendar. ...
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