Tornado 05 : A column of swirling wind: an extremely destructive funnel?shaped rotating column of air that passes in a narrow path over land. (PCiCCDE)
Arizona Department of Health Services, Emergency Preparedness Glossary, Phoenix, Arizona, USA 2011. http://www.azdhs.gov/als/childcare/documents/prepa redness/emergency-preparedness-glossary.pdf, (Emr Prep - Amer) {846}