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<br />Appendix A. Colorado Extreme Storm Precipitation Data <br />Study - Complete Storm List <br /> <br />The following paragraphs describe the content of the extreme precipitation reports. <br /> <br />Each storm was given a brief descriptive name, usually based on the town, river or other <br />landmark nearest the center of heaviest precipitation. A state name was assigned to each <br />storm based on the state in which the heaviest precipitation fell. (Note: with large general <br />storms, several states may receive heavy precipitation at the same time.) The date listed <br />for each storm was the date on which the heaviest precipitation fell or the period of <br />consecutive days when a larger storm system or episode first began and finally ended. <br />Each storm was assigned one or more geographical regions based on a simple 6-region <br />system as shown on Figure 2. Storms were categorized using a highly simplified <br />meteorological typing scheme: 1) General (G) storms which were large multi-state storm <br />systems accompanied by a clearly defined low pressure system and/or frontal boundaries, <br />2) Local Convective (LC) storms which wer(': localized thunderstorms or thunderstorm <br />complexes not clearly associated with large-Scale atmospheric lifting mechanisms, and 3) <br />Local Convective Storms embedded within General storm systems (GLC). Storms with <br />air masses of tropical origin were not treated or categorized separately. A single latitude <br />and longitude was assigned to most storms based on an estimate of the coordinates where <br />the heaviest precipitation fell. <br /> <br />Two columns, "Maximum Precipitation" and "Remarks," were used to cryptically describe <br />the heaviest rains associated with each listed storm. This was very inadequate for <br />providing detailed storms descriptions, but was intended to provide sufficient information <br />to a reader to allow a quick assessment as to the significance of the storm without <br />additional research. For most storms, the "Maximum Precipitation" column listed the <br />largest observed or estimated precipitation amount for each storm, ifknown. The <br />"Remarks" column added supplemental reports or a very brief descIiption of impacts. The <br />storm list ends with two additional columns that indicate if information about the storm is <br />on file at the U.S. Bureau of Reclamation F1()Od Hydrology Section at the Denver Federal <br />Center and if a Depth-Area-Duration analysis has been performed. <br /> <br />35 <br />