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.
Best Buy. In fiscal year 2013 Best Buy operated 1990 stores with the total space of 55,785,000-square feet. The average space for a Best Buy store was 28,032-square feet. In 2013 Best Buy's total revenue was equal to $45 billion.The average revenue per square foot was equal to $808.he average space for Wal-Mart's store was 100,644-square feet. In 2013, Wal-Mart's total revenue was equal to $469 billion. The average revenue per square foot was equal to $435. Right after 2009 Wal-Mart suffered a decrease in revenue per square foot.