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portions of a two day period but several included three days and the longest covered a four day period. Generally these storm periods covered similar time intervals as those episodes described in Section 3.1. Notable exceptions were that episodes 8S-7, which occurred on February 15-16 and SC-3, which occurred on March 10, did not qualify as a storm as defined here, since the network average precipitation was less than 0.05 inch. Likewise, there was no precipitation recordeq at any gauge site with episodes 88-8 (January 28). Also, episode MC-3 (on March 17) was included within the March 15-17 storm period. 3.2.2 storm Duration Individual storm duration (in hours) for each gauge site is presented in Table 3-3. Over the gauge network, the longest storm period (February 23-26) averaged 68 hours, while the shortest (February 17-18) averaged 10 hours, The average storm period lasted a relatively long 32 hours (median 31 hours), but this was undoubtably influenced by the February 23-26 storm. without this exceptional storm, the average duration was 28 hours (about one day) with the median between 21 and 31 hours. Both the Mormon Lake and the Happy Jack gauge sites averaged 35 hours per storm (a little above the average) but the gauge site at Mingus Mountain was considerably less (25 hours). This latter gauge site is actually upwind of the Mogollon Rim (across the verde Valley) on a separate range called the Black Hills and that may have been a contributing factor. For whatever reasons, this gauge had four storm periods with durations of 10 hours or less (36 percent) which was far less than any other gauge site. The Flagstaff Arboretum 3-25 I I I I I I I I I I I I I I I I I I I