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<br />, ....'_"", ,..c, ""', ~".,,~,,-,,",' ~'~~.A' ""~r~, <br /> <br />2. SCOPE-OF-WORK <br /> <br />At a meeting at the Colorado Climate Center on the Foothills Campus of Colorado State <br />University on October 10, 1996, the focus of the CCCIHMS Service Agreement was <br />discussed. Given the available funding, the f')llowing Scope-of-Work was defi.ned: <br /> <br />. HMS should identify the most important storms on the list and the n~sources <br />necessary to analyze them further. <br />. Heavy rain events in the Great Plains Region are outside the scope of the HMS <br />study. <br />. Limited funds for data acquisition restrict HMS to acquiring the following as <br />part of the present study: <br /> <br />a. Lightning data for the Opal, Wyoming and ]?agosa Springs storms, <br /> <br />Note: Another storm, the Ridgeway 18E storm, was "discovered" by HMS <br />during a check of "Storm Data" and added to the list as part of Event <br />11 by mutual agreement. This storm was renamed the Owl Creek <br />Pass storm <br /> <br />b. Sounding data should be acquired via the Internet, <br /> <br />c. Surface Weather observations should Ibe obtained from the National <br />Climatic Data Center for the Frijole Creek, Cheyenne, Opal, and Pagosa <br />Springs events only, and <br /> <br />d. If possible, radar weather observations should be obtained for the Frijole <br />Creek and Big Thompson Canyon (,vents. <br /> <br />3, STORM SUMMARIES <br /> <br />3.1 Penrose, Colorado; June 2-6, 1921 <br /> <br />Because of the early date of occurrence of this event, virtually 110 meteorological <br />observations could be found. However, thankfully, a detailed account ofthis catastrophic <br />event given by Follansbee and Jones (1922) was located. Much of what follows is <br />interpreted based on this early paper. <br /> <br />Based on interviews of local residents (ibid), the sequence of events leading up to the <br />main flood on the night of June 3 have been reconstructed. Figures 2 and 3 show the <br />locations of places affected by heavy rain and flooding associated with this historic <br />flood. Apparently, two distinct periods of heavy convective showers and <br />thundershowers occurred over separate locations on June 2 and 3 making this event a <br />General Convective Storm (GCS). Additionally, the colla.pse of the Schaeffer Reservoir <br />on Beaver Creek on the moming of June 5 led to serious flooding and loss in <br /> <br />3 <br />