Global WarmingAn overall increase in world temperatures which may be caused by additional heat being trapped by greenhouse gases. Pseudo-Warm FrontA 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 AdvectionTransport of warm air into an area by horizontal winds. Low-level warm advection sometimes is referred to (erroneously) as overrunning. Although the two terms are not properly interchangeable, both imply the presence of lifting in low levels.Warm Core LowA low pressure area which is warmer at its center than at its periphery. Tropical cyclones exhibit this temperature pattern. Unlike cold core lows, these lows produce much of their cloud cover and precipitation during the nighttime.Warm FrontA transition zone between a mass of warm air and the colder air it is replacing.Warm OcclusionA frontal zone formed when a cold front overtakes a warm front and, finding colder air ahead of the warm front, leaves the ground and rises up and over this denser air. Compare with cold occlusion.Warm SectorA region of warm surface air between a cold front and a warm front.
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