tirsdag den 17. marts 2009

Distribution of Historical Tornadoes 1950 - 1995

43.433 tornadoer på 45 år ... næsten 1000 om året ...

43.433 tornadoes in 45 years ... almost 1000 each year ...


Paths of tornadoes from 1950 to 1995 are shown in below. The map (pdf) was produced at Texas Tech University's Center for Geospatial Technology, and includes data for 43,433 tornadoes. According to the information published with the map, a similar map was published in 1987 by Theodore T. Fujita which showed 23,264 tornadoes between 1930 and 1970. The map took three years to produce by hand. In comparison, the map shown here took just a few hours to generate.

Read more: http://www.gis.ttu.edu/center/ESRIMapBook/HistoricTornadoes_8x11.pdf

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