CHELSEA DIVISION: 10 STATION #1502 DATE OF RUN COUNTY: WASHTENAW PERIOD ANALYSIS FOR 1978 -1999 ( 22 YEARS) 11/03/04 PRECIPITATION (INCHES) YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL 1978 .00 .00 .00 .00 3.06 3.20 2.98 1.79 3.28 2.53 1.96 2.08 20.88 1979 2.38 .44 1.77 3.51 2.66 4.14 2.95 5.38 .30 1.18 3.92 2.98 31.61 1980 .92 1.02 3.17 3.78 2.63 3.98 3.45 6.80 4.42 1.47 .92 2.62 35.18 1981 .43 1.87 1.08 4.41 4.02 3.40 3.71 2.65 6.74 3.38 .93 1.39 34.01 1982 1.79 1.67 2.39 1.05 2.00 3.91 3.67 1.02 3.10 .49 5.44 1.97 28.50 1983 .65 .94 2.63 3.48 3.25 2.98 3.60 1.49 2.56 2.46 2.80 2.45 29.29 1984 .51 .44 2.67 2.04 3.66 .81 1.42 1.07 3.93 2.01 2.77 2.45 23.78 1985 2.39 2.02 3.37 .82 2.21 2.20 4.92 2.19 3.30 4.11 3.88 1.18 32.59 1986 .88 2.45 1.47 1.67 1.96 2.49 4.35 3.48 7.23 3.35 1.04 1.18 31.55 1987 1.66 .07 1.55 1.10 1.71 2.39 2.34 7.04 4.57 2.40 2.95 3.43 31.21 1988 .57 1.75 1.15 1.20 .46 .92 3.47 3.87 3.99 3.93 4.93 1.77 28.01 1989 1.24 .75 1.94 2.36 4.28 6.61 4.28 3.05 4.05 1.51 2.97 1.76 34.80 1990 1.85 5.28 1.93 2.97 3.24 3.32 2.96 4.32 4.63 5.29 3.05 4.00 42.84 1991 1.42 1.08 1.95 3.27 2.99 2.04 2.01 4.68 .83 5.16 2.94 1.97 30.34 1992 1.71 1.06 2.90 3.72 1.70 2.78 6.75 3.32 4.31 3.00 4.06 2.21 37.52 1993 3.63 1.16 1.53 3.27 2.05 6.29 3.27 2.08 4.86 3.05 2.09 .77 34.05 1994 2.34 .87 2.37 2.90 .94 5.15 3.70 4.77 2.75 2.16 2.83 1.63 32.41 1995 2.80 .82 1.76 3.14 3.31 3.11 6.13 4.37 1.66 3.73 4.00 1.22 36.05 1996 1.55 1.37 1.70 3.55 2.46 4.59 .47 2.53 4.43 2.46 2.88 2.57 30.56 1997 1.49 3.69 2.82 1.05 3.94 3.34 3.43 4.35 3.84 2.03 1.64 1.57 33.19 1998 3.05 2.56 4.12 3.60 1.50 3.73 1.54 3.70 1.93 1.81 1.98 1.06 30.58 1999 3.77 1.24 .89 4.39 1.93 2.39 3.43 2.44 1.44 1.23 .73 1.73 25.61 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 1.763 1.550 2.150 2.728 2.544 3.353 3.401 3.472 3.552 2.670 2.760 2.000 31.571 VARIANCE .969 1.419 .680 1.356 1.011 2.098 2.028 2.764 2.904 1.568 1.652 .638 22.088 STND DEV .984 1.191 .825 1.165 1.006 1.448 1.424 1.663 1.704 1.252 1.285 .799 4.700 SKEW .514 1.688 .573 -.382 -.110 .500 .328 .495 .119 .473 .186 .749 -.070 KURTOSIS 2.407 5.875 2.772 1.793 2.352 3.224 3.571 2.654 2.963 2.655 2.436 3.186 3.725 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 PRECIPITATION (INCHES) 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 1.763 1.550 2.150 2.728 2.544 3.353 3.401 3.472 3.552 2.670 2.760 2.000 31.571 VARIANCE .969 1.419 .680 1.356 1.011 2.098 2.028 2.764 2.904 1.568 1.652 .638 22.088 STND DEV .984 1.191 .825 1.165 1.006 1.448 1.424 1.663 1.704 1.252 1.285 .799 4.700 SKEW .514 1.688 .573 -.382 -.110 .500 .328 .495 .119 .473 .186 .749 -.070 KURTOSIS 2.407 5.875 2.772 1.793 2.352 3.224 3.571 2.654 2.963 2.655 2.436 3.186 3.725 GAMMA 3.043 1.857 7.133 4.383 5.058 4.859 4.519 4.208 3.029 4.190 3.998 6.739 45.246 BETA .579 .835 .301 .622 .503 .690 .753 .825 1.173 .637 .690 .297 .698 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 .66 .84 .79 .75 .52 .58 .57 .65 21.69 05 .20 .07 .63 .50 1.01 1.30 1.26 1.23 .98 .94 .94 .92 24.27 10 .51 .27 1.05 1.03 1.24 1.61 1.58 1.56 1.31 1.19 1.20 1.10 25.73 20 .82 .53 1.37 1.49 1.58 2.05 2.04 2.03 1.83 1.56 1.58 1.34 27.57 25 .94 .64 1.49 1.66 1.72 2.24 2.23 2.23 2.05 1.72 1.75 1.44 28.29 30 1.06 .75 1.60 1.83 1.85 2.42 2.42 2.43 2.27 1.87 1.90 1.54 28.95 40 1.28 .98 1.80 2.14 2.11 2.77 2.78 2.81 2.71 2.16 2.21 1.72 30.17 50 1.52 1.22 2.00 2.45 2.38 3.12 3.15 3.20 3.17 2.46 2.53 1.90 31.34 60 1.78 1.50 2.22 2.79 2.66 3.51 3.56 3.63 3.68 2.79 2.87 2.10 32.54 70 2.08 1.84 2.45 3.17 2.99 3.95 4.03 4.12 4.28 3.17 3.28 2.32 33.85 75 2.26 2.04 2.59 3.40 3.19 4.21 4.30 4.42 4.64 3.40 3.51 2.45 34.60 80 2.47 2.28 2.75 3.67 3.41 4.51 4.62 4.76 5.06 3.66 3.79 2.60 35.44 90 3.08 3.01 3.20 4.42 4.06 5.37 5.54 5.74 6.29 4.42 4.58 3.02 37.72 95 3.65 3.69 3.60 5.12 4.64 6.15 6.38 6.64 7.43 5.11 5.29 3.40 39.67 99 4.88 5.15 4.43 6.58 5.88 7.72 8.16 8.56 9.92 6.59 6.68 4.18 43.50