Saint Charles 3SSW DIVISION: STATION #7255 DATE OF RUN COUNTY: PERIOD ANALYSIS FOR 1971 -1999 ( 26 YEARS) 11/17/04 EXTREME PRECIPITATION YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL 1971 .44 .50 .77 .41 .32 .50 .83 1.22 1.02 1.05 .21 1.68 3.92 1972 .28 .29 .62 1.07 .25 2.06 .95 2.57 .69 1.19 .52 1.33 7.48 1973 .18 .30 1.15 .49 1.25 .60 1.82 1.07 1.30 .88 .78 .56 3.77 1974 .91 .72 .98 .29 .82 .94 .75 1.37 1.33 .72 1.23 .47 3.73 1975 .52 .34 .49 .67 1.08 1.05 .84 3.12 1.67 .18 .71 .63 9.27 1976 .39 1.65 2.25 2.30 1.68 3.50 .33 .63 .43 1.46 .55 .30 7.08 1977 .27 .23 .90 .76 .30 .56 .31 2.00 2.08 1.40 .63 .62 5.49 1978 1.75 .13 .39 .63 .84 .58 .82 .83 1.24 .34 .55 .65 4.06 1979 .95 .60 .49 .72 .53 1.24 .66 .60 .02 .60 .92 .42 4.01 1980 .42 .70 .71 .53 .65 .80 1.40 .50 1.03 .70 .28 1.02 5.40 1981 .18 .37 .23 .78 1.25 .99 1.45 .96 2.45 2.70 .93 .30 7.08 1982 .88 .55 .78 .41 .69 .90 1.86 1.53 .87 .22 1.20 .87 4.65 1983 .29 .31 .76 1.10 1.33 1.50 .45 1.35 1.20 1.09 .95 .60 6.01 1984 .24 .40 1.70 .64 1.30 1.75 1.95 1.78 .55 .91 1.00 .54 4.76 1988 .37 .23 .53 .88 .63 .40 4.78 .67 .96 .97 1.37 .50 6.06 1989 .76 .22 .45 .52 1.35 2.08 .35 .95 1.10 .79 1.82 .30 6.63 1990 .48 1.25 .42 .30 .88 .70 .96 2.93 2.65 1.55 1.83 .90 6.07 1991 .85 .53 .66 2.99 .93 .68 .94 .98 .79 .87 .85 .68 8.62 1992 .51 .56 .52 1.02 .63 .71 1.30 2.22 1.30 .91 1.17 .92 4.77 1993 .82 .65 .58 1.80 .76 .87 .95 2.30 1.33 1.96 .50 .30 5.53 1994 1.01 .50 .73 1.45 .64 3.10 .71 1.17 .60 .85 1.07 .60 8.18 1995 .69 .24 .51 .98 .50 .63 .56 1.13 .55 .68 2.21 .75 4.42 1996 .55 .50 .35 1.02 2.89 2.08 .85 1.24 .74 1.15 .75 .50 6.08 1997 .50 1.53 .38 .48 .49 .48 1.14 .75 .86 .92 .59 .37 4.28 1998 1.08 .82 .87 .87 .75 .41 .76 .67 .49 2.13 .82 .76 3.80 1999 .96 .19 .44 1.76 .40 1.25 1.39 .69 .83 .71 .39 .88 5.77 NON-ZERO 26 26 26 26 26 26 26 26 26 26 26 26 26 ZEROES 0 0 0 0 0 0 0 0 0 0 0 0 0 PROB OF ZERO .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 NOTE: STATISTICS ARE COMPUTED ON THE NON-ZERO VALUES NUMBER YEARS 26 26 26 26 26 26 26 26 26 26 26 26 26 MEAN .626 .550 .718 .957 .890 1.168 1.120 1.355 1.080 1.036 .917 .671 5.651 VARIANCE .130 .152 .189 .412 .304 .663 .766 .554 .367 .326 .235 .105 2.492 STND DEV .361 .390 .434 .642 .551 .814 .875 .744 .606 .571 .485 .325 1.579 SKEW 1.115 1.594 2.138 1.648 1.905 1.487 2.931 .997 1.004 1.140 .990 1.349 .647 KURTOSIS 4.534 4.905 7.724 5.416 7.688 4.493 12.931 2.937 3.886 4.407 3.634 5.028 2.540 NOTE: A MISSING OR INCOMPLETE VALUE, INDICATED BY THE FIELD BEING FILLED WITH 9s, IS NOT INCLUDED IN THE ANALYSIS. ????? DIVISION: STATION #7255 DATE OF RUN COUNTY: PERIOD ANALYSIS FOR 1971 -1999 ( 26 YEARS) 11/17/04 EXTREME PRECIPITATION STATISTICS PARAMETER JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL NUMBER YEARS 26 26 26 26 26 26 26 26 26 26 26 26 26 MEAN .626 .550 .718 .957 .890 1.168 1.120 1.355 1.080 1.036 .917 .671 5.651 VARIANCE .130 .152 .189 .412 .304 .663 .766 .554 .367 .326 .235 .105 2.492 STND DEV .361 .390 .434 .642 .551 .814 .875 .744 .606 .571 .485 .325 1.579 SKEW 1.115 1.594 2.138 1.648 1.905 1.487 2.931 .997 1.004 1.140 .990 1.349 .647 KURTOSIS 4.534 4.905 7.724 5.416 7.688 4.493 12.931 2.937 3.886 4.407 3.634 5.028 2.540 GAMMA 3.287 2.644 4.049 2.985 3.397 2.776 2.752 3.911 2.378 3.338 3.808 5.124 14.056 BETA .190 .208 .177 .320 .262 .421 .407 .346 .454 .310 .241 .131 .402 PROB OF ZERO .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 LEVELS PROBABILITY PERCENTILE VALUES 01 .10 .07 .15 .14 .15 .15 .14 .27 .11 .17 .18 .18 2.74 05 .18 .13 .25 .26 .27 .30 .28 .46 .23 .31 .30 .27 3.42 10 .24 .18 .32 .35 .35 .41 .39 .58 .33 .41 .39 .33 3.83 20 .33 .27 .41 .49 .48 .58 .55 .77 .49 .55 .52 .42 4.36 25 .37 .30 .46 .55 .54 .65 .62 .85 .57 .62 .57 .45 4.57 30 .41 .34 .50 .61 .59 .73 .69 .93 .64 .68 .63 .49 4.77 40 .49 .41 .58 .73 .69 .87 .84 1.08 .78 .81 .73 .56 5.15 50 .56 .48 .66 .85 .80 1.03 .99 1.24 .93 .93 .84 .63 5.52 60 .65 .57 .75 .99 .93 1.20 1.15 1.41 1.11 1.08 .95 .70 5.90 70 .75 .67 .85 1.15 1.07 1.41 1.35 1.61 1.31 1.24 1.09 .79 6.33 75 .81 .73 .92 1.25 1.15 1.53 1.47 1.73 1.44 1.34 1.17 .84 6.58 80 .88 .80 .99 1.36 1.25 1.68 1.61 1.87 1.58 1.46 1.27 .90 6.86 90 1.09 1.00 1.20 1.69 1.54 2.10 2.02 2.26 2.02 1.80 1.54 1.07 7.65 95 1.28 1.20 1.39 1.99 1.80 2.50 2.40 2.62 2.43 2.11 1.79 1.22 8.34 99 1.69 1.61 1.79 2.58 2.37 3.33 3.21 3.35 3.32 2.78 2.31 1.54 9.73