Colliding air masses within tornado alley make for exceptional conditions that allow for vigorously rising air, which is essential for thunderstorms. Storms in the Great Plains regularly reach 10 miles (16 kilometers) into the sky because of these conditions: 1  Winds pushing disparate air masses converge in tornado alley. 2  Colliding air, known as fronts, have nowhere to go, therefore they rise.
Apple's fiscal 2011 10-K report showed that the average size of an Apple Store has creeped up to 8,400 square feet per store, but Needham & Company analyst Charlie Wolf says that the retail stores are bulging at the seams and just aren't big enough.
One of the biggest differences in J.C. Penney's lifestyle center locations is that most are one-story and average 85,000 to 105,000 square feet, as opposed to two to three-story malls stores that average 100,000 to 165,000 square feet.lthough the look-and-feel of the stores are not significantly different, product assortment is reduced. In addition, the stores cost $5 million less to build, $1.5 million less to stock and require 25% less employees than the typical Lowe's; however, sales per square foot are about 84% of the typical store.