Anyone know what causes the erratic temperature fluctuations when ascending a mountainside? We were traveling up Mt Evans auto road in Colorado. The temperature was lowering about 5 degrees every 1000 ft, about what is normally expected, then at about 13000 feet the temperature rose 10 degrees in a matter of seconds while we were continuing to ascend and then rapidly fell again. I've seen this before when traveling up a mountain but never quite this dramatic. Is this chinook winds? I don't recall our orientation on the mountain, whether it was the windward or leeward side when it occured. But it does seem to occur around the switchbacks.