Question

Eventually the cold front catches up with, and merges with, the warm front forming an occluded front. at this stage in the life cycle of an extra-tropical cyclone (known as occlusion, the storm often begins to weaken as the central air pressure begins to:

Answer 1

The extratropical zone reaches an occlusion. This is the time when the storm weakens after the central pressure begins to subside and then slowly becomes colder.  The change lowers the high temperature when the cold front gets over the warm front.