Back Door Cold FrontA cold front moving south or southwest along the Atlantic seaboard and Great Lakes; these are especially common during the spring months.Cold FrontA zone separating two air masses, of which the cooler, denser mass is advancing and replacing the warmer.
Pseudo-Cold FrontA boundary between a supercell's inflow region and the rear-flank downdraft (or RFD). It extends outward from the mesocyclone center, usually toward the south or southwest (but occasionally bows outward to the east or southeast in the case of an occluded mesocyclone), and is characterized by advancing of the downdraft air toward the inflow region. It is a particular form of gust front.
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