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USGS Daily Statistics for Illinois

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The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 05595820 CASEY FORK AT MOUNT VERNON, IL


Jefferson County, Illinois
Hydrologic Unit Code 07140106
Latitude  38°17'11", Longitude  88°52'17" NAD83
Drainage area 76.9  square miles
Contributing drainage area 76.9  square miles
Gage datum 420.00 feet above NGVD29
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00060, Discharge, cubic feet per second,
Day of
month		 Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1985-10-01 -> 2022-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 84 222 88 197 184 109 39 9.5 16 5.5 34 152
2 64 238 71 115 207 138 107 16 14 14 54 55
3 97 145 113 266 152 93 84 9.7 22 24 25 54
4 149 115 186 417 167 46 59 6.9 18 6.8 18 48
5 215 82 153 169 240 61 24 6.5 8.5 5.8 22 77
6 136 136 125 171 145 51 30 24 5.5 6.7 26 112
7 94 246 115 98 137 31 50 9 5.5 6.1 19 48
8 66 118 87 88 170 98 91 32 95 8.1 14 32
9 52 66 198 81 177 93 45 15 81 38 15 56
10 77 90 214 231 79 51 64 11 12 12 14 31
11 180 90 109 264 107 53 41 7 17 15 51 53
12 126 108 286 148 92 63 58 11 6.6 8.3 95 65
13 245 134 167 91 148 42 71 30 5.4 21 40 50
14 169 184 249 223 178 45 25 67 6.3 37 241 47
15 123 125 153 158 142 25 26 94 6.1 17 159 155
16 89 116 90 162 207 47 82 101 9.9 15 109 104
17 93 139 117 136 487 152 92 86 22 17 97 97
18 133 70 323 78 352 122 23 43 10 20 65 107
19 148 72 411 157 112 137 13 13 5.3 12 157 68
20 129 115 346 154 42 134 27 9.6 23 8.4 150 49
21 103 143 184 126 38 37 66 16 5.5 9.1 32 129
22 153 160 102 124 82 71 19 39 9.2 8 59 182
23 185 114 148 175 40 35 13 11 38 34 31 88
24 95 163 112 193 35 128 12 7.8 26 16 34 124
25 75 272 157 186 77 80 17 8.6 48 12 70 135
26 113 115 152 222 172 120 12 53 52 59 67 105
27 114 98 158 176 124 61 7.1 46 12 119 140 142
28 104 129 176 250 95 28 9.3 14 7 32 169 181
29 53 44 180 410 86 28 12 19 7.8 20 89 153
30 102   315 312 50 30 25 10 5.1 34 144 73
31 147   220   96   28 13   55   80