U.S. DEPARTMENT OF THE INTERIOR - U.S. GEOLOGICAL SURVEY - WATER RESOURCES STATION NUMBER 04099808 LITTLE ELKHART RIVER AT MIDDLEBURY, IND. STREAM SOURCE AGENCY USGS STATE 18 COUNTY 039 LATITUDE 414031 LONGITUDE 0854201 NAD27 DRAINAGE AREA 97.60 CONTRIBUTING DRAINAGE AREA 91.70 DATUM 810.00 NGVD29 Date Processed: 2007-08-07 17:45 By dvarvin PARAMETER CODE - 00060 Discharge STATISTIC CODE - 00003 MEAN DURATION TABLE OF DAILY VALUES FOR PERIOD OCT TO SEP CLASS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 WATER YEAR NUMBER OF DAYS IN CLASS RANGE 1980 1980 5 29 32 62 53 35 38 33 18 9 9 13 8 9 4 5 1 2 1 1981 1981 8 21 32 39 25 26 36 27 32 21 24 13 13 10 9 9 3 4 2 5 1 1 1 1 1 1 1982 1982 2 30 21 20 43 55 50 47 22 16 8 6 12 10 5 6 1 1 1 2 2 2 1 1 1 1983 1983 31 43 21 16 27 46 45 22 32 22 21 12 8 6 4 1 5 2 1 1984 1984 2 12 18 51 46 44 36 35 24 24 22 8 11 11 3 9 3 3 2 1 1 1985 1985 9 56 33 36 39 44 23 25 21 14 12 8 10 6 8 3 5 1 3 2 2 2 1 1 1 1986 1986 17 50 42 37 59 28 34 19 15 14 15 12 7 5 7 1 1 2 1987 1987 15 36 25 28 16 23 66 57 44 14 12 10 8 3 2 2 2 1 1 1988 1988 1 10 13 25 62 45 25 14 28 43 24 13 13 13 11 9 6 3 2 3 1 1 1 1989 1989 13 46 27 27 36 31 32 40 32 17 19 14 10 8 5 2 2 1 1 1 1 1990 1990 7 30 32 31 35 30 37 31 20 28 19 16 16 7 6 4 4 2 4 2 2 1 1 1991 1991 1 26 35 23 16 10 15 23 39 56 35 23 21 16 7 5 4 3 1 1 1 2 1 1 1992 1992 10 16 56 22 33 51 61 29 37 21 16 5 2 2 1 1 1 2 1993 1993 6 26 45 19 26 41 33 39 36 21 14 14 10 9 6 3 6 1 4 2 2 1 1 1994 1994 8 44 48 26 28 26 48 56 28 21 7 4 6 6 2 2 2 2 1 1995 1995 18 31 35 37 46 68 53 25 26 11 3 2 5 2 1 2 1996 1996 17 57 79 59 42 20 22 11 19 8 13 5 1 1 1 4 2 1 1 1 1 1 1997 1997 22 25 27 53 62 45 41 31 21 8 8 6 5 4 2 2 1 1 1 1998 1998 6 17 40 41 57 35 30 36 33 24 13 9 3 8 3 2 2 1 3 1 1 1999 1999 36 31 25 14 16 61 33 28 31 22 26 15 11 5 2 3 1 1 1 1 2 2000 2000 11 19111 72 47 39 27 17 7 6 3 2 2 1 1 1 2001 2001 6 12 27 64 40 40 26 21 38 20 21 16 12 6 4 2 4 1 1 1 1 2 2002 2002 1 26 19 21 21 29 40 23 26 45 35 31 12 15 5 2 6 2 2 1 1 1 1 2003 2003 31 51118 51 44 22 14 12 7 3 3 1 2 1 1 2 1 1 CLASS VALUE TOTAL ACCUM PERCT CLASS VALUE TOTAL ACCUM PERCT CLASS VALUE TOTAL ACCUM PERCT 1 0.00 0 8766 100.00 13 95.00 663 2924 33.36 25 466.00 14 82 0.94 2 22.00 7 8766 100.00 14 108.00 584 2261 25.79 26 533.00 19 68 0.78 3 25.00 22 8759 99.92 15 124.00 422 1677 19.13 27 608.00 14 49 0.56 4 29.00 85 8737 99.67 16 141.00 345 1255 14.32 28 695.00 10 35 0.40 5 33.00 259 8652 98.70 17 161.00 252 910 10.38 29 793.00 5 25 0.29 6 37.00 694 8393 95.74 18 184.00 174 658 7.51 30 906.00 6 20 0.23 7 43.00 751 7699 87.83 19 210.00 131 484 5.52 31 1030.00 3 14 0.16 8 49.00 791 6948 79.26 20 240.00 91 353 4.03 32 1180.00 4 11 0.13 9 56.00 697 6157 70.24 21 274.00 69 262 2.99 33 1350.00 3 7 0.08 10 64.00 788 5460 62.29 22 313.00 57 193 2.20 34 1540.00 2 4 0.05 11 73.00 896 4672 53.30 23 358.00 26 136 1.55 35 1760.00 2 2 0.02 12 83.00 852 3776 43.08 24 408.00 28 110 1.25 VALUE EXCEEDED 'P' PERCENT OF TIME P95 = 37.6 P90 = 41.4 P80 = 48.5 P75 = 52.3 P50 = 76.2 P25 = 109.9 P10 = 164.0 P05 = 220.5 U.S. DEPARTMENT OF THE INTERIOR - U.S. GEOLOGICAL SURVEY - WATER RESOURCES STATION NUMBER 04099808 LITTLE ELKHART RIVER AT MIDDLEBURY, IND. STREAM SOURCE AGENCY USGS STATE 18 COUNTY 039 LATITUDE 414031 LONGITUDE 0854201 NAD27 DRAINAGE AREA 97.60 CONTRIBUTING DRAINAGE AREA 91.70 DATUM 810.00 NGVD29 Date Processed: 2007-08-07 17:45 By dvarvin PARAMETER CODE - 00060 Discharge STATISTIC CODE - 00003 MEAN LOWEST MEAN VALUE AND RANKING FOR THE FOLLOWING NUMBER OF CONSECUTIVE DAYS FOR PERIOD APR TO MAR WATER YEAR RANGE 1 3 7 14 30 60 90 120 183 1980 1981 34.0 8 34.7 9 35.6 9 36.5 8 38.6 7 42.5 9 48.0 12 51.0 12 50.8 8 1981 1982 60.0 23 61.0 23 62.1 23 69.0 23 74.0 23 81.5 23 82.4 22 83.8 21 90.7 21 1982 1983 42.0 16 42.3 16 42.7 16 43.9 16 44.3 13 44.8 12 47.9 10 52.8 13 69.8 14 1983 1984 37.0 11 37.3 11 37.9 11 38.6 11 40.5 10 42.1 8 44.6 8 47.4 8 54.8 11 1984 1985 32.0 5 32.7 5 33.9 6 35.0 6 38.3 6 44.5 10 48.7 13 54.1 14 74.4 16 1985 1986 46.0 19 47.3 20 48.1 20 50.1 20 51.1 16 53.5 16 56.1 15 57.7 15 66.3 12 1986 1987 52.0 22 53.0 22 53.6 22 57.6 22 61.4 21 65.0 19 73.6 21 81.0 20 83.4 19 1987 1988 33.0 6 33.0 6 33.1 5 34.1 5 38.7 8 40.0 6 40.8 6 41.7 4 45.5 5 1988 1989 24.0 2 24.7 2 25.6 2 27.4 2 30.0 2 35.6 2 38.9 4 42.0 6 47.6 6 1989 1990 34.0 9 34.3 8 34.9 7 36.5 9 41.4 11 45.0 13 46.7 9 47.7 9 50.1 7 1990 1991 42.0 17 44.0 18 47.9 19 49.3 19 60.4 20 63.4 18 67.4 18 71.1 18 100 23 1991 1992 36.0 10 37.3 12 38.4 12 40.6 12 44.3 14 47.0 14 47.9 11 49.4 10 67.4 13 1992 1993 37.0 12 38.7 13 40.6 13 41.8 13 45.6 15 51.2 15 60.3 16 63.5 17 70.5 15 1993 1994 43.0 18 43.3 17 44.0 17 48.1 17 55.6 18 66.0 20 72.1 19 84.1 22 80.5 18 1994 1995 33.0 7 34.0 7 34.9 8 35.2 7 35.9 5 37.0 4 39.2 5 40.1 3 43.1 4 1995 1996 40.0 14 40.3 14 40.9 14 42.4 14 42.6 12 44.7 11 51.4 14 50.5 11 52.6 9 1996 1997 46.0 20 46.3 19 47.0 18 48.2 18 57.2 19 58.3 17 60.9 17 63.1 16 77.4 17 1997 1998 49.0 21 50.0 21 51.9 21 55.2 21 62.4 22 74.8 22 83.4 23 85.6 23 88.9 20 1998 1999 40.0 15 41.0 15 41.6 15 42.4 15 54.8 17 66.8 21 72.4 20 78.7 19 94.2 22 1999 2000 37.0 13 37.0 10 37.6 10 38.4 10 39.7 9 40.9 7 40.9 7 42.1 7 42.6 3 2000 2001 30.0 3 31.3 4 31.9 4 32.5 4 33.0 3 37.1 5 36.8 1 37.9 2 38.4 2 2001 2002 22.0 1 23.0 1 24.1 1 24.7 1 27.6 1 34.0 1 38.2 3 41.8 5 53.6 10 2002 2003 30.0 4 30.0 3 30.0 3 30.9 3 34.1 4 36.4 3 37.0 2 37.0 1 38.0 1 U.S. DEPARTMENT OF THE INTERIOR - U.S. GEOLOGICAL SURVEY - WATER RESOURCES STATION NUMBER 04099808 LITTLE ELKHART RIVER AT MIDDLEBURY, IND. STREAM SOURCE AGENCY USGS STATE 18 COUNTY 039 LATITUDE 414031 LONGITUDE 0854201 NAD27 DRAINAGE AREA 97.60 CONTRIBUTING DRAINAGE AREA 91.70 DATUM 810.00 NGVD29 Date Processed: 2007-08-07 17:45 By dvarvin PARAMETER CODE - 00060 Discharge STATISTIC CODE - 00003 MEAN HIGHEST MEAN VALUE AND RANKING FOR THE FOLLOWING NUMBER OF CONSECUTIVE DAYS FOR PERIOD OCT TO SEP WATER YEAR RANGE 1 3 7 15 30 60 90 120 183 1980 1980 460 20 305 21 260 18 221 16 195 16 154 15 131 16 119 17 108 18 1981 1981 1260 6 813 6 558 6 395 5 272 7 237 5 204 4 189 5 164 6 1982 1982 1410 5 1210 3 995 1 680 1 453 1 312 2 248 2 211 3 170 3 1983 1983 801 10 517 14 365 13 265 13 222 11 186 10 155 14 138 14 136 11 1984 1984 519 18 361 18 253 19 198 19 155 18 148 16 140 15 131 15 112 15 1985 1985 2040 1 1501 1 895 2 592 2 384 2 329 1 250 1 238 1 196 2 1986 1986 588 16 474 15 296 16 266 12 231 10 184 11 161 13 160 10 149 8 1987 1987 537 17 410 17 283 17 208 18 154 19 125 21 121 20 111 18 106 19 1988 1988 712 14 443 16 298 15 216 17 169 17 136 18 127 17 128 16 109 16 1989 1989 1080 7 603 9 369 12 246 14 212 14 182 12 171 9 154 12 136 10 1990 1990 1030 8 712 7 487 7 340 7 293 4 212 6 197 5 180 7 151 7 1991 1991 1500 4 943 5 596 5 382 6 286 5 211 7 192 8 186 6 164 5 1992 1992 377 21 326 20 220 21 169 20 145 21 128 20 112 21 108 21 108 17 1993 1993 1760 2 1034 4 705 3 484 3 351 3 238 4 227 3 215 2 207 1 1994 1994 477 19 349 19 224 20 160 22 152 20 132 19 122 19 111 19 105 20 1995 1995 257 24 221 23 173 23 130 23 102 23 98.6 22 92.0 22 89.0 22 83.7 22 1996 1996 1700 3 1267 2 663 4 437 4 276 6 242 3 194 6 162 9 127 14 1997 1997 790 11 548 12 414 10 317 9 237 9 188 9 162 11 149 13 134 12 1998 1998 766 13 590 11 474 8 330 8 241 8 197 8 192 7 191 4 164 4 1999 1999 789 12 598 10 411 11 286 11 218 12 179 13 169 10 170 8 140 9 2000 2000 294 23 209 24 154 24 114 24 91.0 24 79.7 24 77.8 24 71.8 23 64.8 23 2001 2001 659 15 542 13 351 14 234 15 196 15 143 17 125 18 111 20 90.6 21 2002 2002 871 9 690 8 459 9 302 10 213 13 174 14 162 12 158 11 133 13 2003 2003 318 22 268 22 220 22 163 21 120 22 90.3 23 79.5 23 71.6 24 61.4 24 U.S. DEPARTMENT OF THE INTERIOR - U.S. GEOLOGICAL SURVEY - WATER RESOURCES STATION NUMBER 04099808 LITTLE ELKHART RIVER AT MIDDLEBURY, IND. STREAM SOURCE AGENCY USGS STATE 18 COUNTY 039 LATITUDE 414031 LONGITUDE 0854201 NAD27 DRAINAGE AREA 97.60 CONTRIBUTING DRAINAGE AREA 91.70 DATUM 810.00 NGVD29 Date Processed: 2007-08-07 17:45 By dvarvin PARAMETER CODE - 00060 Discharge STATISTIC CODE - 00003 MEAN ANNUAL AND/OR SEMI-ANNUAL VALUES MEAN VALUE AND RANKING FOR MEAN VALUE AND RANKING FOR PERIOD INCLUDED IN LOW-VALUE ANALYSIS PERIOD INCLUDED IN HIGH-VALUE ANALYSIS (APR-MAR) (OCT-SEP) WATER YEAR WATER YEAR RANGE RANGE 1980 1981 76.0 6 1980 1980 82.0 18 1981 1982 150 23 1981 1981 116 6 1982 1983 98.9 14 1982 1982 120 4 1983 1984 92.0 11 1983 1983 99.1 12 1984 1985 130 21 1984 1984 84.9 16 1985 1986 116 16 1985 1985 131 2 1986 1987 94.9 12 1986 1986 115 7 1987 1988 76.8 7 1987 1987 84.6 17 1988 1989 95.0 13 1988 1988 75.9 20 1989 1990 91.0 10 1989 1989 102 11 1990 1991 133 22 1990 1990 105 9 1991 1992 89.9 9 1991 1991 120 5 1992 1993 125 20 1992 1992 88.9 15 1993 1994 118 17 1993 1993 155 1 1994 1995 63.2 1 1994 1994 80.3 19 1995 1996 63.9 2 1995 1995 70.1 21 1996 1997 124 19 1996 1996 90.9 14 1997 1998 120 18 1997 1997 111 8 1998 1999 116 15 1998 1998 129 3 1999 2000 69.0 5 1999 1999 102 10 2000 2001 65.7 3 2000 2000 53.0 23 2001 2002 79.1 8 2001 2001 64.4 22 2002 2003 68.3 4 2002 2002 98.6 13 2003 2003 49.8 24 U.S. DEPARTMENT OF THE INTERIOR - U.S. GEOLOGICAL SURVEY - WATER RESOURCES STATION NUMBER 04099808 LITTLE ELKHART RIVER AT MIDDLEBURY, IND. STREAM SOURCE AGENCY USGS STATE 18 COUNTY 039 LATITUDE 414031 LONGITUDE 0854201 NAD27 DRAINAGE AREA 97.60 CONTRIBUTING DRAINAGE AREA 91.70 DATUM 810.00 NGVD29 Date Processed: 2007-08-01 09:33 By dvarvin Daily Values Monthly and Annual Statistics MEAN Discharge Number of years retrieved is 26 Normal monthly means (All days) Year Oct Nov Dec Jan Feb March April May June July Aug Sept 1979 * * * * * * * * * * * * 1980 48.2 76.7 104.3 79.2 75.2 130.0 167.0 72.8 70.4 42.8 52.5 65.7 1981 46.8 38.6 85.4 53.8 139.0 84.5 118.9 141.1 267.9 189.2 117.0 117.9 1982 93.1 83.7 79.5 94.1 90.8 404.1 199.5 114.6 107.9 73.0 54.5 45.4 1983 44.5 100.3 169.3 93.8 90.4 94.2 170.8 191.1 80.7 62.2 50.6 40.5 1984 47.1 53.8 97.4 59.1 124.5 127.5 151.0 111.5 100.3 55.2 42.4 52.5 1985 90.3 115.5 132.0 181.8 280.1 263.7 210.5 79.7 64.5 56.4 51.6 61.9 1986 87.2 202.2 160.7 97.8 161.5 169.8 93.3 79.3 68.4 125.6 67.5 65.8 1987 152.1 96.4 110.4 80.4 87.8 108.9 105.1 89.7 54.8 48.2 39.9 40.6 1988 43.7 48.0 134.7 93.5 123.4 100.9 145.1 55.3 36.7 37.9 43.2 50.9 1989 141.0 184.1 123.1 138.6 82.5 101.0 112.3 67.8 120.3 56.0 47.2 49.2 1990 44.2 63.0 42.9 99.1 194.7 205.1 124.4 183.2 103.5 64.3 72.1 66.3 1991 171.5 143.3 206.9 201.8 136.9 116.5 135.3 105.8 78.1 50.7 49.4 45.5 1992 86.1 128.2 100.4 83.3 101.1 116.4 94.9 63.4 50.4 80.5 64.0 99.0 1993 66.5 190.9 153.3 307.5 113.3 214.6 175.0 114.5 277.9 106.6 60.7 74.3 1994 118.4 88.2 84.1 86.4 126.9 110.5 102.4 72.9 52.1 43.6 43.3 38.3 1995 36.0 47.7 75.1 80.5 71.9 94.9 100.9 77.8 63.9 74.3 72.6 45.4 1996 44.3 66.1 48.6 56.6 58.4 57.9 81.5 263.9 211.3 77.3 65.9 58.8 1997 59.0 92.0 122.2 106.3 188.2 172.1 113.5 99.5 114.9 81.2 92.0 102.2 1998 72.4 82.9 112.8 233.8 136.9 191.6 185.9 120.4 82.5 65.2 160.4 98.8 1999 95.4 82.2 76.5 146.3 145.4 137.5 202.9 117.3 77.8 63.6 47.0 40.0 2000 42.4 40.5 46.3 42.7 52.4 56.8 78.5 73.0 76.0 51.3 38.1 38.7 2001 36.8 43.0 36.4 43.1 188.6 96.3 95.1 68.9 60.8 34.9 37.7 43.3 2002 98.0 76.7 85.1 75.0 142.8 136.3 139.9 203.5 95.2 54.4 43.5 35.5 2003 38.5 38.7 38.0 37.9 40.1 53.1 60.3 116.3 53.1 43.0 38.2 39.5 2004 * * * * * * * * * * * * * Indicates a no-value month Station 04099808 LITTLE ELKHART RIVER AT MIDDLEBURY, IND. MEAN Discharge Ranked Normal monthly means (All days) Oct Nov Dec Jan Feb March * 1979 * 1979 * 1979 * 1979 * 1979 * 1979 * 2004 * 2004 * 2004 * 2004 * 2004 * 2004 36.0 1995 38.6 1981 36.4 2001 37.9 2003 40.1 2003 53.1 2003 36.8 2001 38.7 2003 38.0 2003 42.7 2000 52.4 2000 56.8 2000 38.5 2003 40.5 2000 42.9 1990 43.1 2001 58.4 1996 57.9 1996 42.4 2000 43.0 2001 46.3 2000 53.8 1981 71.9 1995 84.5 1981 43.7 1988 47.7 1995 48.6 1996 56.6 1996 75.2 1980 94.2 1983 44.2 1990 48.0 1988 75.1 1995 59.1 1984 82.5 1989 94.9 1995 44.3 1996 53.8 1984 76.5 1999 75.0 2002 87.8 1987 96.3 2001 44.5 1983 63.0 1990 79.5 1982 79.2 1980 90.4 1983 100.9 1988 46.8 1981 66.1 1996 84.1 1994 80.4 1987 90.8 1982 101.0 1989 47.1 1984 76.7 1980 85.1 2002 80.5 1995 101.1 1992 108.9 1987 48.2 1980 76.7 2002 85.4 1981 83.3 1992 113.3 1993 110.5 1994 59.0 1997 82.2 1999 97.4 1984 86.4 1994 123.4 1988 116.4 1992 66.5 1993 82.9 1998 100.4 1992 93.5 1988 124.5 1984 116.5 1991 72.4 1998 83.7 1982 104.3 1980 93.8 1983 126.9 1994 127.5 1984 86.1 1992 88.2 1994 110.4 1987 94.1 1982 136.9 1991 130.0 1980 87.2 1986 92.0 1997 112.8 1998 97.8 1986 136.9 1998 136.3 2002 90.3 1985 96.4 1987 122.2 1997 99.1 1990 139.0 1981 137.5 1999 93.1 1982 100.3 1983 123.1 1989 106.3 1997 142.8 2002 169.8 1986 95.4 1999 115.5 1985 132.0 1985 138.6 1989 145.4 1999 172.1 1997 98.0 2002 128.2 1992 134.7 1988 146.3 1999 161.5 1986 191.6 1998 118.4 1994 143.3 1991 153.3 1993 181.8 1985 188.2 1997 205.1 1990 141.0 1989 184.1 1989 160.7 1986 201.8 1991 188.6 2001 214.6 1993 152.1 1987 190.9 1993 169.3 1983 233.8 1998 194.7 1990 263.7 1985 171.5 1991 202.2 1986 206.9 1991 307.5 1993 280.1 1985 404.1 1982 * Indicates a no-value month Station 04099808 LITTLE ELKHART RIVER AT MIDDLEBURY, IND. MEAN Discharge Ranked Normal monthly means (All days) April May June July Aug Sept * 1979 * 1979 * 1979 * 1979 * 1979 * 1979 * 2004 * 2004 * 2004 * 2004 * 2004 * 2004 60.3 2003 55.3 1988 36.7 1988 34.9 2001 37.7 2001 35.5 2002 78.5 2000 63.4 1992 50.4 1992 37.9 1988 38.1 2000 38.3 1994 81.5 1996 67.8 1989 52.1 1994 42.8 1980 38.2 2003 38.7 2000 93.3 1986 68.9 2001 53.1 2003 43.0 2003 39.9 1987 39.5 2003 94.9 1992 72.8 1980 54.8 1987 43.6 1994 42.4 1984 40.0 1999 95.1 2001 72.9 1994 60.8 2001 48.2 1987 43.2 1988 40.5 1983 100.9 1995 73.0 2000 63.9 1995 50.7 1991 43.3 1994 40.6 1987 102.4 1994 77.8 1995 64.5 1985 51.3 2000 43.5 2002 43.3 2001 105.1 1987 79.3 1986 68.4 1986 54.4 2002 47.0 1999 45.4 1982 112.3 1989 79.7 1985 70.4 1980 55.2 1984 47.2 1989 45.4 1995 113.5 1997 89.7 1987 76.0 2000 56.0 1989 49.4 1991 45.5 1991 118.9 1981 99.5 1997 77.8 1999 56.4 1985 50.6 1983 49.2 1989 124.4 1990 105.8 1991 78.1 1991 62.2 1983 51.6 1985 50.9 1988 135.3 1991 111.5 1984 80.7 1983 63.6 1999 52.5 1980 52.5 1984 139.9 2002 114.5 1993 82.5 1998 64.3 1990 54.5 1982 58.8 1996 145.1 1988 114.6 1982 95.2 2002 65.2 1998 60.7 1993 61.9 1985 151.0 1984 116.3 2003 100.3 1984 73.0 1982 64.0 1992 65.7 1980 167.0 1980 117.3 1999 103.5 1990 74.3 1995 65.9 1996 65.8 1986 170.8 1983 120.4 1998 107.9 1982 77.3 1996 67.5 1986 66.3 1990 175.0 1993 141.1 1981 114.9 1997 80.5 1992 72.1 1990 74.3 1993 185.9 1998 183.2 1990 120.3 1989 81.2 1997 72.6 1995 98.8 1998 199.5 1982 191.1 1983 211.3 1996 106.6 1993 92.0 1997 99.0 1992 202.9 1999 203.5 2002 267.9 1981 125.6 1986 117.0 1981 102.2 1997 210.5 1985 263.9 1996 277.9 1993 189.2 1981 160.4 1998 117.9 1981 * Indicates a no-value month Station 04099808 LITTLE ELKHART RIVER AT MIDDLEBURY, IND. MEAN Discharge Quartiles of Normal monthly means (All days) Oct Nov Dec Jan Feb March Twenty-Fifth Percentile 44.2 49.5 75.5 63.1 83.8 95.2 Fiftieth Percentile 62.8 82.5 98.9 90.0 124.0 116.5 Seventy-Fifth Percentile 94.8 111.7 129.8 130.5 144.8 171.5 April May June July Aug Sept Twenty-Fifth Percentile 96.5 72.9 61.6 48.8 43.2 40.5 Fiftieth Percentile 121.7 102.7 78.0 59.3 51.1 50.0 Seventy-Fifth Percentile 169.8 119.6 106.8 76.5 67.1 66.2