CHELSEA DIVISION: 10 STATION #1502 DATE OF RUN COUNTY: WASHTENAW PERIOD ANALYSIS FOR 1978 -1999 ( 22 YEARS) 11/03/04 EXTREME PRECIPITATION YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL 1978 .00 .00 .00 .00 .98 1.36 1.32 .72 .78 1.05 .65 .65 3.28 1979 .84 .11 .69 .85 .87 2.60 .71 2.33 .30 .32 .62 1.33 5.38 1980 .35 .59 .57 1.27 1.33 1.30 1.00 2.24 1.85 .45 .46 .50 6.80 1981 .17 .89 .56 .90 1.06 1.03 1.78 .76 1.09 1.51 .42 .72 6.74 1982 .48 .56 .78 .50 .75 1.08 1.35 .38 1.17 .15 1.30 .65 5.44 1983 .23 .23 .74 .90 .63 1.46 .98 1.20 .94 .98 .85 .78 3.60 1984 .20 .18 1.24 .54 1.42 .35 .41 .55 .82 .84 1.12 .50 3.93 1985 1.47 .45 1.06 .33 .65 .85 1.69 .81 1.15 2.35 1.43 .33 4.92 1986 .30 .46 .80 .40 .49 .92 1.60 1.75 2.08 1.36 .45 .58 7.23 1987 .38 .06 .51 .30 .47 .95 .97 3.25 1.33 .70 .92 .86 7.04 1988 .25 .38 .37 .38 .32 .70 1.30 1.12 1.72 .77 1.16 .62 4.93 1989 .39 .40 .95 .65 1.66 2.72 2.49 1.04 1.28 .57 .87 .92 6.61 1990 .46 1.50 .48 1.12 1.12 .67 1.10 1.69 2.38 1.64 1.00 1.27 5.29 1991 .42 .52 .51 1.36 1.12 .56 .49 1.65 .33 1.56 1.01 .43 5.16 1992 .63 .38 .74 .82 .38 .78 1.92 1.92 1.26 1.34 .90 1.01 6.75 1993 .92 .26 .32 .71 1.07 1.81 .95 .66 1.10 1.13 .75 .19 6.29 1994 1.15 .37 1.25 .99 .50 1.70 2.20 1.27 1.06 .91 .96 .75 5.15 1995 .79 .48 .60 .50 .71 1.43 2.48 1.69 .48 .90 1.49 .46 6.13 1996 .74 .64 .84 .70 1.09 1.07 .15 1.57 1.64 1.05 1.14 .64 4.59 1997 .39 1.63 1.02 .28 .75 .61 2.06 .85 1.13 1.00 .43 .44 4.35 1998 .93 1.18 1.38 1.30 .39 1.00 .88 .87 .46 1.10 .80 .44 4.12 1999 1.00 .37 .27 1.33 .70 1.57 .75 .86 .98 .50 .47 .47 4.39 NON-ZERO 21 21 21 21 22 22 22 22 22 22 22 22 22 ZEROES 1 1 1 1 0 0 0 0 0 0 0 0 0 PROB OF ZERO .05 .05 .05 .05 .00 .00 .00 .00 .00 .00 .00 .00 .00 NOTE: STATISTICS ARE COMPUTED ON THE NON-ZERO VALUES NUMBER YEARS 22 22 22 22 22 22 22 22 22 22 22 22 22 MEAN .595 .554 .747 .768 .839 1.205 1.299 1.326 1.151 1.008 .873 .661 5.369 VARIANCE .125 .176 .097 .129 .132 .368 .434 .486 .293 .247 .104 .081 1.394 STND DEV .354 .419 .312 .359 .364 .607 .659 .697 .541 .497 .322 .284 1.181 SKEW .811 1.407 .441 .286 .477 1.099 .274 .984 .430 .654 .188 .846 .004 KURTOSIS 2.830 4.154 2.321 1.843 2.434 3.789 2.189 3.689 2.835 3.728 2.153 3.320 1.862 NOTE: A MISSING OR INCOMPLETE VALUE, INDICATED BY THE FIELD BEING FILLED WITH 9s, IS NOT INCLUDED IN THE ANALYSIS. CHELSEA DIVISION: 10 STATION #1502 DATE OF RUN COUNTY: WASHTENAW PERIOD ANALYSIS FOR 1978 -1999 ( 22 YEARS) 11/03/04 EXTREME PRECIPITATION STATISTICS PARAMETER JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL NUMBER YEARS 22 22 22 22 22 22 22 22 22 22 22 22 22 MEAN .595 .554 .747 .768 .839 1.205 1.299 1.326 1.151 1.008 .873 .661 5.369 VARIANCE .125 .176 .097 .129 .132 .368 .434 .486 .293 .247 .104 .081 1.394 STND DEV .354 .419 .312 .359 .364 .607 .659 .697 .541 .497 .322 .284 1.181 SKEW .811 1.407 .441 .286 .477 1.099 .274 .984 .430 .654 .188 .846 .004 KURTOSIS 2.830 4.154 2.321 1.843 2.434 3.789 2.189 3.689 2.835 3.728 2.153 3.320 1.862 GAMMA 3.065 2.038 5.766 4.472 5.410 4.515 3.190 4.030 4.118 3.640 7.142 5.782 20.847 BETA .194 .272 .129 .172 .155 .267 .407 .329 .280 .277 .122 .114 .258 PROB OF ZERO .05 .05 .05 .05 .00 .00 .00 .00 .00 .00 .00 .00 .00 LEVELS PROBABILITY PERCENTILE VALUES 01 .00 .00 .00 .00 .23 .28 .20 .28 .24 .19 .29 .19 3.02 05 .07 .03 .18 .15 .35 .45 .37 .46 .40 .32 .41 .28 3.59 10 .17 .11 .33 .29 .42 .56 .50 .58 .51 .42 .49 .34 3.93 20 .28 .20 .45 .42 .53 .72 .68 .76 .67 .56 .59 .43 4.36 25 .32 .24 .49 .47 .58 .79 .76 .84 .74 .62 .64 .46 4.54 30 .36 .28 .53 .52 .62 .86 .84 .92 .80 .68 .68 .49 4.69 40 .43 .36 .61 .60 .70 .99 1.00 1.07 .93 .80 .75 .56 4.99 50 .51 .45 .69 .69 .79 1.12 1.17 1.22 1.06 .92 .83 .62 5.28 60 .60 .54 .77 .78 .88 1.26 1.35 1.38 1.20 1.05 .92 .69 5.58 70 .70 .66 .86 .89 .98 1.43 1.56 1.58 1.37 1.20 1.01 .77 5.91 75 .76 .73 .91 .96 1.05 1.52 1.69 1.69 1.47 1.30 1.07 .82 6.10 80 .83 .81 .97 1.03 1.12 1.64 1.84 1.83 1.58 1.40 1.13 .87 6.32 90 1.04 1.06 1.15 1.24 1.32 1.96 2.27 2.21 1.91 1.72 1.31 1.03 6.91 95 1.23 1.29 1.31 1.43 1.51 2.26 2.68 2.57 2.21 2.00 1.47 1.16 7.42 99 1.64 1.81 1.63 1.84 1.89 2.89 3.55 3.32 2.86 2.61 1.81 1.44 8.40