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<br />10 days, indicating that while precipitation totals were near <br />normal the number of precipitation days was considerably above <br />normal (152 percent of normal). This was particularly true <br />during February where over twice the normal number of days <br />produced measurable precipitation. <br /> <br />Flagstaff Airport temperatures during the January-March <br />period were slightly below normal in January (mean temperature <br />was 0.6 degrees F below normal), slightly above normal in <br />February (mean 0.4 degrees F above normal), and below normal <br />in March (mean 1.7 degrees F below normal). The mean sky <br />coverage was right at normal (5.3 tenths) in January, 6.3 <br />tenths in February, well above the 5.1 tenths normal (which <br />reflected the greater number of storm days)r and 5.5 tenths <br />in March, near the normal of 5.2 tenths. <br /> <br />The general impression, from these statistics, is that <br />the January-March, 1987 period was fairly typical for any <br />winter period with the exception that February was more cloudy <br />and had more precipitation days than usual. It should be <br />noted that even though a significant storm (of a once in 20 <br />year magnitude at some locations) occurred during the month <br />(February 23-26), the monthly precipitation total was not <br />significantly above normal. In fact, 1.77 inches fell at <br />Flagstaff during this storm and without it the monthly total <br />would have been well below normal. Reasonably, the same can <br />be said for the other precipitation gauge sites over the area. <br /> <br />3.2.1 <br /> <br />storm Precipitation During the Field Season <br /> <br />The passage of synoptic scale weather systems usually <br />produces some finite period of organized (but not necessarily <br /> <br />3-23 <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 />