The “why” (make that “why’s”) are many. There’s my personal interest with severe weather, Arizona’s modest, but relatively tame, tornado history and the recent conclusion of the Verification of the Origins of Rotation in Tornadoes Experiment (VORTEX2) spring tour through the Central Plains.
VORTEX2 is a field study project sponsored through the National Oceanic and Atmospheric Administration (NOAA) and the National Science Foundation (NSF) intended to further scientific understanding of “tornadogenesis” and increase warning times.
Apart from measurements and readings, VORTEX2 earned national publicity and yielded some striking stills and on-scene footage, including video of a June 5, 2009, tornado near La Grange, Wyo.
In Arizona, tornadoes aren’t what you’d call a major threat, but they happen on occasion. A query of the NOAA National Climatic Data Center (NCDC) produces 214 reported tornadoes between January 1, 1950, and February 28, 2009. All but a dozen measured F1 (weak), F0 (gale) or lower on the Enhanced Fujita Scale (EFS).

Should you be interested, tornado preparedness and safety information is readily available on the Web, including on just in case arizona and sites administered by the National Severe Storms Laboratory (NSSL), Ready.gov and the FEMA.
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