Now that it is officially hot enough to do the barefoot chicken dance while walking to the mailbox, many of us plan to escape to the cool pines of the Mogollon Rim. Pinetop, Prescott, Payson ...

What do meteorologists mean when they start talking about the Mogollon Rim? I have looked it up on the Web, but its exact location escapes me. Where is it and how does it affect weather in Arizona?