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<br />~ <br /> <br />A record with missing data can be analyzed as though it were a con- <br />tinuous record with a length equal to the number of years of data available <br />if data are missing from the record for reasons not connected with unusual <br />hydrologic occurrences (Interagency Advisory Committee on Water Data, 1982, <br />p. 15). The Cheyenne record has no data for durations less than 1 hour for <br />the years 1968-69 and 1971-72. To determine whether the data were missing <br />due to unusual hydrologic occurrences, the 24-hour record was examined. The <br />24-hour annual maximum precipitation values for the years 1971-72 were among <br />the smallest values in the record, but the smaller of the two was only 43 <br />percent smaller than the median value in the record. The 24-hour annual <br />maximum precipitation for 1968 was 10 percent larger than the median value <br /> <br />Table l.--Annual maximum precipitation <br /> <br />[Data from National Weather Service, except <br /> <br /> 5-minute duration 10-minute duration 15-minute duration <br /> Maximum Maximum Maximum <br /> Month rainfall Month rainfall Month rainfall <br />Year and day (inches) and day (inches) and day (inches) <br /> <br />1871 <br />1872 <br />1873 <br />1874 <br />1875 <br /> <br />1876 <br />1877 <br />1878 <br />1879 <br />1880 <br /> <br />1881 <br />1882 <br />1883 <br />1884 <br />1885 <br /> <br />1886 <br />1887 <br />1888 <br />1889 <br />1890 <br /> <br />1891 <br />1892 <br />1893 <br />1894 <br />1895 <br /> <br />4 <br />