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Explore the catastrophic tornado events on March 8th, 2009, affecting Defiance County. Learn about the small CAPE environments that led to the formation of significant tornadoes and the impact of synoptic conditions. Discover how the regional outbreak unfolded, including detailed accounts of the tornadoes that ravaged the area.
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March tornado outbreaks • 1956 – 6th • 4 tornadoes, including a short track F4 in Marion county • 1976 – 12th • 9 tornadoes, including several long track tors with 2 F3’s • 1976 – 20th • 2 tornadoes, part of a much larger regional outbreak, including a long track F4 in White county • 1986 – 10th • Regional outbreak just outside our CWA, including several long track tors • 1991 – 27th • 4 tornadoes, part of a much larger regional outbreak, including 2 long track F3’s
Tornadoes in small CAPE Environments • Synoptic conditions on March 8th 2009 were very similar to April 4th 2004 • Johns et al. (1993), Rasmussen & Blanchard (1998), and other studies have shown that significant tornadoes can occur in small CAPE (less than 1000J kg-1). In addition, studies of tropical storm environments (McCaul 1990; 1991), and case studies of low-topped supercells in the Great Lakes (Davies 1993, Markowski & Straka 2000) illustrated that tornadoes can occur in low buoyancy, high shear environments.
