TORNADO, HURRICANE, AND CYCLONE

Reversible Cape in Tropical Cyclone Tornado Regimes

Tropical cyclone (TC) tornadoes produced by supercells occur in characteristic thermodynamic environments of  rich low-level moisture,  high precipitable water and  commonly (but not always) enhancement to CAPE by diurnal, diabatic surface heating. These factors juxtapose with strong low-level shear magnitudes, high storm-relative helicity and enlarged hodographs to optimize supercellular to...

Wellposedness of the tornado-hurricane equations

We prove local-in-time existence of a unique mild solution for the tornado-hurricane equations in a Hilbert space setting. The wellposedness is shown simultaneously in a halfspace, a layer, and a cylinder and for various types of boundary conditions which admit discontinuities at the edges of the cylinder. By an approach based on symmetric forms we first prove maximal regularity for a linearize...

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), f...

Environmental Modeling, Technology, and Communication for Land Falling Tropical Cyclone/Hurricane Prediction

Katrina (a tropical cyclone/hurricane) began to strengthen reaching a Category 5 storm on 28th August, 2005 and its winds reached peak intensity of 175 mph and pressure levels as low as 902 mb. Katrina eventually weakened to a category 3 storm and made a landfall in Plaquemines Parish, Louisiana, Gulf of Mexico, south of Buras on 29th August 2005. We investigate the time series intensity change...

Tornado Warnings and Tornado Fatalities : The Case of May 22 , 2011 Tornado in Joplin , Missouri