CHELSEA DIVISION: 10 STATION #1502 DATE OF RUN COUNTY: WASHTENAW PERIOD ANALYSIS FOR 1978 -1999 ( 22 YEARS) 11/03/04 EXTREME SNOWFALL YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL 1978 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 2.0 2.0 7.0 1979 8.0 1.0 1.0 1.0 .0 .0 .0 .0 .0 .0 2.0 1.0 16.5 1980 1.0 2.0 8.0 .0 .0 .0 .0 .0 .0 .5 2.0 2.0 16.0 1981 3.0 8.0 .0 .0 .0 .0 .0 .0 .0 .0 1.7 7.0 13.7 1982 4.0 5.5 3.6 6.0 .0 .0 .0 .0 .0 .0 .8 1.0 20.1 1983 1.0 2.3 7.2 8.0 .0 .0 .0 .0 .0 .0 1.6 4.6 17.2 1984 2.5 1.8 2.5 .0 .0 .0 .0 .0 .0 .0 1.0 4.3 8.1 1985 3.2 3.0 4.5 .0 .0 .0 .0 .0 .0 .0 1.5 2.0 15.1 1986 2.3 4.0 3.5 .5 .0 .0 .0 .0 .0 .0 3.8 1.5 11.2 1987 7.5 .8 4.5 1.5 .0 .0 .0 .0 .0 .8 .0 7.0 21.0 1988 2.2 6.0 1.5 .2 .0 .0 .0 .0 .0 .0 .0 3.0 20.9 1989 2.4 3.5 .7 .2 .0 .0 .0 .0 .0 2.5 .0 3.0 10.2 1990 1.4 8.0 3.3 .8 .0 .0 .0 .0 .0 .0 .0 3.0 13.3 1991 1.5 5.1 .0 .0 .0 .0 .0 .0 .0 .0 .4 2.0 8.6 1992 7.5 1.2 8.4 1.1 .0 .0 .0 .0 .0 .8 .0 4.0 19.5 1993 3.0 2.2 4.4 4.0 .0 .0 .0 .0 .0 .0 .8 1.2 11.9 1994 .0 5.0 .9 .0 .0 .0 .0 .0 .0 .0 .0 .0 17.1 1995 4.8 4.0 1.1 .0 .0 .0 .0 .0 .0 .0 .0 2.0 15.1 1996 2.0 2.5 5.0 .0 .0 .0 .0 .0 .0 .0 .0 4.5 10.6 1997 5.0 1.5 2.0 .0 .0 .0 .0 .0 .0 .0 2.4 4.0 17.0 1998 4.0 .0 4.0 .0 .0 .0 .0 .0 .0 .0 .0 .9 7.5 1999 10.0 3.7 5.0 .0 .0 .0 .0 .0 .0 .0 .0 2.9 25.3 NON-ZERO 20 20 19 10 0 0 0 0 0 4 12 21 22 ZEROES 2 2 3 12 22 22 22 22 22 18 10 1 0 PROB OF ZERO .09 .09 .14 .55 1.00 1.00 1.00 1.00 1.00 .82 .45 .05 .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 3.82 3.55 3.74 2.33 .00 .00 .00 .00 .00 1.15 1.67 3.00 14.68 VARIANCE 6.63 4.65 5.46 7.46 .00 .00 .00 .00 .00 .83 .82 3.17 24.63 STND DEV 2.58 2.16 2.34 2.73 .00 .00 .00 .00 .00 .91 .90 1.78 4.96 SKEW 1.02 .70 .52 1.16 .00 .00 .00 .00 .00 1.07 .84 .92 .18 KURTOSIS 2.97 2.59 2.44 2.85 .00 .00 .00 .00 .00 2.28 3.69 3.15 2.27 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 SNOWFALL 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 3.82 3.55 3.74 2.33 .00 .00 .00 .00 .00 1.15 1.67 3.00 14.68 VARIANCE 6.63 4.65 5.46 7.46 .00 .00 .00 .00 .00 .83 .82 3.17 24.63 STND DEV 2.58 2.16 2.34 2.73 .00 .00 .00 .00 .00 .91 .90 1.78 4.96 SKEW 1.02 .70 .52 1.16 .00 .00 .00 .00 .00 1.07 .84 .92 .18 KURTOSIS 2.97 2.59 2.44 2.85 .00 .00 .00 .00 .00 2.28 3.69 3.15 2.27 GAMMA 2.533 2.749 2.304 .860 .000 .000 .000 .000 .000 999.000 3.499 3.095 8.595 BETA 1.506 1.293 1.624 2.709 .000 .000 .000 .000 .000 999.000 .476 .968 1.708 PROB OF ZERO .09 .09 .14 .55 1.00 1.00 1.00 1.00 1.00 .82 .45 .05 .00 LEVELS PROBABILITY PERCENTILE VALUES 01 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 5.6 05 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .3 7.5 10 .4 .5 .0 .0 .0 .0 .0 .0 .0 .0 .0 .9 8.7 20 1.4 1.3 1.0 .0 .0 .0 .0 .0 .0 .0 .0 1.4 10.4 25 1.7 1.6 1.3 .0 .0 .0 .0 .0 .0 .0 .0 1.6 11.1 30 2.0 1.9 1.6 .0 .0 .0 .0 .0 .0 .0 .0 1.8 11.7 40 2.5 2.4 2.2 .0 .0 .0 .0 .0 .0 .0 .0 2.2 12.9 50 3.1 2.9 2.8 .0 .0 .0 .0 .0 .0 .0 .6 2.6 14.1 60 3.7 3.4 3.4 .2 .0 .0 .0 .0 .0 .0 1.0 3.0 15.4 70 4.4 4.1 4.2 .9 .0 .0 .0 .0 .0 .0 1.4 3.5 16.8 75 4.8 4.5 4.6 1.3 .0 .0 .0 .0 .0 .0 1.6 3.8 17.7 80 5.3 4.9 5.2 1.8 .0 .0 .0 .0 .0 .0 1.8 4.2 18.6 90 6.8 6.2 6.7 3.5 .0 .0 .0 .0 .0 .6 2.4 5.2 21.3 95 8.2 7.5 8.2 5.3 .0 .0 .0 .0 .0 .8 2.9 6.2 23.7 99 11.2 10.0 11.4 9.5 .0 .0 .0 .0 .0 2.1 4.0 8.2 28.7