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Tornado Alley: Patterns without predictability

November 19, 2013

With the devastating tornado(s) that happened in the last few days in Illinois and elsewhere it may be of interest to have a look at a little data about “Tornado Alley”.  The article is a little dated, since it is reporting on the tornado last May in Moore, Oklahoma but the data may shed some light on these most recent events.

Full Article at

By Jason Palmer

The enormous tornado that struck in Moore, Oklahoma, on Monday has added a chilling entry into the list of the deadliest tornadoes on record.

The event has many recalling a record-breaking tornado that struck in precisely the same region in 1999, during which the fastest winds ever seen on the Earth’s surface were recorded: over 500km/h (310mph).


The geography and climatology in the US’ interior provide for just this situation with great regularity; three-quarters of the tornadoes that happen on Earth happen in North America. A disproportionate number of those occur in a region in the nation’s centre, widely known as “Tornado Alley”.

It is a loosely defined area; the state of Texas gets on average the highest annual number of tornadoes, but Kansas, further north, gets the highest number of the more violent storms.

Full Article at

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