Professor Mandia's Air Masses, Weather Fronts, and Station Model Extra Help Air Masses Air masses are explained quite well in the Lab introduction, therefore I will not spend much time with them here. Station Model Station models are explained quite well in the Lab introduction, therefore I will not spend much time with them here. Fronts A weather front is a boundary between two distinct air masses. Since wind direction will relate to the air mass, wind direction will shift dramatically when a front passes. For example, the winds in the warm air ahead of a cold front will be southerly, but the winds in the cooler air behind the cold front will normally be from the northwest.
Clouds are good indicators of weather fronts.
Tips Course Scott A. Mandia, Assoc. S.C.C.C. 533 College Rd.