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<br />of Miles City. Soundings were collected in Montana from May to August. <br />At Goodland, Kansas, and Big Spring and Midland, Texas, observations were <br />taken from May to September. <br /> <br />During 1977, special HIPLEX soundings were also observed at Billings, <br />Montana, about 115 km west-southwest of Miles City to study conditions in <br />the vicinity of mountain-generated convective clouds and storms. Soundings <br />were collected from May to August in Montana. Special mesoscale rawin- <br />sondes were collected for the Goodland HIPLEX site to study the generation <br />and propagation of convective systems from the central Colorado Rockies to <br />western Kansas. These soundings were collected at Limon and South Park, <br />Colorado, from July to mid-August 1977 (Danielson et al., 1978). Goodland <br />and Big Spring soundings were collected from May to September. <br /> <br />The GPCM model was initialized using soundings from these data sets on <br />days when satell ite observations of cloud types were avail abl e in 1976 and <br />1977. Care was taken that only one sounding per day was analyzed to <br />determi ne frequency of occurrence when severa 1 soundi ngs were obs,erved on <br />one day (tables 2, 7, 8, and 9). <br /> <br />b. Satell ite Observations <br /> <br />Geosynchronous satellite imagery observed at local noon (1800 G.m.t.) and <br />late afternoon (2300 G.m.t.) were collected in 1976 and 1977. These data <br />provided 2-km resolution visible images of the HIPLEX field sites. This <br />imagery was received from the National Environmental ,Satellite Service, <br />Satellite Field Service Station in Kansas. City, ~1issouri, continuously <br />during the HIPLEX field season. Daily analyses of the imaqery were per- <br />formed for the reqion within 250 km of each field site (Matthews, 198Gb).. <br /> <br />5 <br />