The South-Central United States ("tornado alley") is a favorable location for tornadoes to form because:
a. It is very warm and dry, which increases the chances of rotating convection.
b. t is a unique area of convergence of warm, moist air from the Gulf of Mexico underneath dry air from the Mexican plateau.
c. It is at low elevation and fl at, which provides a lot of fetch for tornadoes to develop.
d. It is the so-called "graveyard of hurricanes", where hurricanes make landfall and spawn tornadoes.