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<br />addition, for the benefit of synoptic analyses the interpolated time versus height fields of <br />temperature, relative humidity, and equivalent potential temperature were contoured, and wind <br />data were displayed as time sequential series of wind barbs. These graphical presentations <br />appear in Appendix A. <br /> <br />C. Synoptic Charts and GOES Satellite Data <br />The surface and constant pressure analyses for the months covering the 1991 Utah/NOAA <br />field research program were obtained on microfilm from the National Climatic Data Center <br />(NCDC) in Asheville, North Carolina. Some of these data were archived on the DR! MclDAS <br />system during the field season. GOES satellite images covering much of the 1991 season were <br />archived by the DR! MclDAS system during the field program. Both these data sets were used <br />extensively in the analysis of 1991 Storm Periods presented in Section 3. From all available <br />infrared GOES images, the cloud top temperature (CTT) over the DOT site was obtained. For <br />periods when sounding data (or interpolated data) were available these cloud top temperatures <br />were converted to heights. A file of the complete set of cloud top temperatures and heights was <br />created. These data are plotted with other meteorological parameters and radar data in Section <br />3. <br /> <br />A new program was written to analyze the files of interpolated data. For comparison <br />with DOT site data, wind data at 2700 m (DOT height) and 3200 m (500 m above DOT) were <br />flagged and written to a separate file. Also,' the relative humidity data for each I-h period were <br />searched, from the surface upward, for values exceeding 95% (approximate water-saturation). <br />The heights and temperatures at the bases and tops of all such layers were determined and <br />written to file. A vertical separation of 100-300 m between individual layers was ignored, and <br />multiple layers such as these were combined into one layer. Westerly (U) and southerly (V) <br />wind components within each saturated layer were averaged and written to the same file, along <br />with the average wind direction and speed determined from the component averages. This file <br />of computed variables was used in many of the analyses presented in Section 4. Saturated layer <br />top temperatures are shown in the Storm Period data.plots of Section 3. <br /> <br />D. Surface Meteorological Data <br />At the DOT site the USBR maintained a tower containing wind, temperature and dew <br />point temperature sensors. The data were recorded on a data logger and processed intolO-min <br />averages by the USBR after the 1991 season. The DR! obtained files of these data covering <br />each day of the 1991 season. The lO-min data were plotted directly in describing the 1991 <br /> <br />2-7 <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />