During the winter cP air masses may stall over the Gulf of Mexico. These air masses are modified by the warm waters of the Gulf over several days and are drawn back to the north. These air masses may be reclassified as mT because of the increase in moisture and warmth of the air mass. These are called .

These are called WARM FRONT.

Explanation: In meteorology, warm front is known as a trailing edge of a retreating mass of cold air. It involves a warm air mass replacing a cold air mass. They are typically located on the equator-facing edge of an isotherm gradient.

Clouds ahead of the warm front are mostly stratiform, and rainfall gradually increases as the front approaches.

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