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<br />( <br /> <br />Table 2. Average depth of among-storm, non-orographic PMP <br />(inches) adjusted to sea level for given storm area sizes and <br />durations. Values derived from HMR 55A sources. <br /> Duration (hours) <br />storm Area <br />(sq. mi. ) 6 12 24 48 72 <br /> 10 46.44 52.30 56.19 59.00 61.27 <br /> 200 32.51 37.39 40.79 43.66 45.95 <br />1000 21.13 25.10 27.81 30.98 33.09 <br />5000 9.94 12.81 14.33 16.87 18.69 <br />10000 6.73 8.89 10.40 12.39 13.17 <br />20000 5.02 , 6.80 8.15 9.44 10.54 <br />