Physiologists use this information to predict the oxygen deprivation a mountaineer faces at high altitude ... On a cold, sunny day there will be a significantly higher atmospheric pressure ...

We spoke to former airline pilot Dan Bubb, now a professor at the University of Nevada, Las Vegas, to find out why 35,000 feet is the typical cruising altitude. Why Planes Fly at High Altitudes ...

The normal high today is 41, which is what's on tap for Sunday. Skies will be mostly sunny and winds will be light from the west. Overall, a picture perfect winter day. Tomorrow the cold front ...