Rain rates increased rapidly following the arrival of the outflow jet from the east.   Six-hour accumulations approached 500-year, 24-hour amounts within just a few hours.   As noted, even the low-lying regions away from rivers and creeks - especially within the Canal Importation (Green) and the Spring Creek (Red) basins - began to accumulate deep, fast flowing water.

      These are rainfall amounts for the period 5:30 - 11:00 MDT on 28 July 1997,  superimposed on the Fort Collins drainage basin map.     Rainfall amounts are given in inches. The analysis is based on observations taken at over 60 local sites having reliable gauges.

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