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<br /> <br />METEOROLOGY. HYDROLOGY, BIG THOMPSON RIVER AND CACHE LA POUDRE RIVER BASINS 13 <br /> <br />1300 <br /> <br />1250 <br /> <br />1200 <br /> <br />1150 <br /> <br />1100 <br /> <br />1050 <br />I <br /> <br />100' <br />I <br /> <br />95' <br /> <br />90' <br /> <br />S5' <br />\ <br /> <br />25' <br /> <br /> <br />50" <br /> <br />45" <br /> <br />40' <br /> <br />35" <br /> <br />30' <br /> <br />o <br />I <br /> <br />1000 <br />500 MILES <br />I <br /> <br />95" <br /> <br />90" <br /> <br />60657015 <br />~~:, <br />. '" ~ <br />. .~"" <br /> <br />EXPLANATION <br /> <br />-70- <br />--65-- <br />-12- <br /> <br />AREA WHERE DEWPOlNT TEMPERATURE EXCEEDED 60 <br />DEGREES FAHRENHEIT <br />LINE OF EQUAL DEWPQINT TEMPERATURE. -Interval 5 <br />dBgreesFahrenheit <br />LINE OF EQUAL AIR TEMPERATURE. -Interval 5 degrees <br />Fahrenheit <br /> <br />. <br /> <br />COLD FRONT.--Oashed where dissipating <br />STATIONARY FRONT. --Dashed where di~sipating <br />SQUAll LINE <br />GEOGRAPHIC CENTER OF HIGH.PRESSURE SYSTEM <br /> <br />. <br /> <br />- <br /> <br />LINE OF EQUAL ATMOSPHERIC PRESSURE AT SEA <br />LEVEl.-12=lD12 millibars. Interval 2 millibars; <br />'-millibar interyal shown by dashed line <br /> <br />H <br />L <br /> <br />GEOGRAPHIC CENTER OF lOW-PRESSURE SYSTEM <br /> <br />FIGURE B.-Surface analysis, 0600 MDT. July 31,1976. <br /> <br />deep, unusually moist boundary layer which was condi- <br />tionally very unstable but which would have to be <br />lifted about 4,000 feet to release its instability. <br /> <br />During the afternoon, the surface pressures were <br />steady or increasing slightly over much of Nebraska <br />and were decreasing in western Colorado (figs. 18, 211, <br />