... cloudsform. These, of course, dissipate by late morning as sur-face heating warms the air again.206 Chapter 8 Air Masses, Fronts, and Middle-Latitude Cyclones 85 86 88 87 9192 88 mT 86 88 85 86 89 919294969291HL3236292425163030cP162132292635LMinimum ... answer. The weather in the immediate vicinity of this coldfront in the southeastern United States is shown in Fig. 8. 12. The data plotted on the map represent the current2 08 Chapter 8 Air Masses, ... become a warmfront. If, on the other hand, the colder air slides up over the mountain and replaces the warmer air on the otherside, the front will become a cold front. If either a coldfront or a...