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<br />transposition." The areal, durational, and regional smoothing done to obtain comprehensive <br />individual drainage estimates and generalized PMP studies is termed "implicit transposition" <br />(WMO, 1986). <br /> <br />Synoptic: Showing the distribution of meteorological elements over an area at a given time, e.g., <br />a synoptic chart, Use in this report also means a weather system that is large enough to be a <br />major feature on large-scale maps (e.g., of the continental U.S.), <br /> <br />Temporal distribution: The time order in which incremental PMP amounts are arranged within <br />a PMP storm. <br /> <br />Tropical Storm: A cyclone of tropical origin that derives its energy from the ocean surface, <br /> <br />Total storm area and total storm duration: The largest area size and longest duration for <br />which depth-area-duration data are available in the records of a major storm rainfall, <br /> <br />Transposition limits: The outer boundaries of the region surrounding an actual storm location <br />that has similar, but not identical, climatic and topographic characteristics throughout. The <br />storm can be transpositioned within the transposition limits with only relatively minor <br />modifications to the observed storm rainfall amounts. <br /> <br />Warm front: Front where relatively warmer air replaces colder air. <br /> <br />Warm sector: Sector of warm air bounded on two sides by the cold and warm fronts extending <br />from a center of low pressure. <br /> <br />xx <br /> <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />