P 3.1 Tropical Cyclone Tornado Records for the Modernized Nws Era

Tornadoes from tropical cyclones (hereafter TCs) pose a specialized forecast challenge at time scales ranging from days for outlooks to minutes for warnings (Spratt et al. 1997, Edwards 1998, Schneider and Sharp 2007, Edwards 2008). The fundamental conceptual and physical tenets of midlatitude supercell prediction, in an ingredientsbased framework (e.g., Doswell 1987, Johns and Doswell 1992), fully apply to TC supercells; however, systematic differences in the relative magnitudes of moisture, instability, lift and shear in TCs (e.g., McCaul 1991) contribute strongly to that challenge. Further, there is a growing realization that some TC tornadoes are not necessarily supercellular in origin (Edwards et al. 2010, this volume).