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.
The original big-box Walmart store is now called a Discount Store, and the company has been closing these stores or converting them to Supercenters for at least the last 5 years. In 2010, the company had 810 Discount Store; the number has shrunk to 508 in 2014.The average size is 105,000 square feet.he stores are open for 11 or 12 hours a day with additional hours for business members. The gas station/convenience store is the sixth format, and a company executive has said that Walmart has no plans to roll-out the format further.