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Pseudo-Warm Front
A boundary between a supercell's inflow region and the forward-flank downdraft (or FFD). It extends outward from at or near the mesocyclone center, usually toward the east or southeast, and normally is either nearly stationary or moves northward or northeastward ahead of the mesocyclone.
Warm Front
A transition zone between a mass of warm air and the colder air it is replacing.

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     Page last Modified: 25 June, 2009 1:01 PM