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USGS Daily Statistics for the Nation

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°17'12", Longitude  88°52'20" NAD83
Drainage area 76.9  square miles
Contributing drainage area 76.9  square miles
Gage datum 419.57 feet above NAVD88
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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 -> 2023-09-30)

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 82 217 86 202 175 104 39 9.9 16 5.4 34 149
2 62 232 70 115 197 131 104 16 14 14 53 53
3 103 141 162 259 147 89 81 10 22 23 25 52
4 148 112 226 399 160 44 57 7.8 18 6.7 18 47
5 210 80 151 173 230 58 24 8.2 10 5.7 22 75
6 133 133 122 173 145 48 29 24 6.5 6.6 25 109
7 92 240 148 98 136 31 53 9.2 5.8 6 18 47
8 64 116 95 87 168 95 90 32 93 8 14 31
9 51 84 192 79 170 91 45 15 79 37 14 55
10 76 93 206 221 76 50 63 11 12 12 14 30
11 176 90 105 252 102 51 40 7 17 15 49 52
12 124 107 273 145 88 62 56 11 6.5 8.2 92 64
13 240 132 160 102 141 41 70 30 5.3 21 39 49
14 165 180 238 232 169 44 24 65 6.2 36 235 47
15 120 122 146 155 135 24 25 92 6 17 155 156
16 87 115 86 163 197 46 80 99 9.7 14 106 102
17 91 137 114 133 462 148 90 84 21 17 95 95
18 136 124 308 78 334 119 25 42 9.8 20 64 104
19 170 75 392 151 107 134 13 13 5.2 12 153 67
20 130 112 330 149 41 130 26 9.4 22 8.2 146 47
21 102 138 175 152 37 36 65 16 5.4 8.9 31 126
22 151 175 106 128 80 70 19 38 9 7.9 58 177
23 181 121 154 169 39 34 13 11 37 33 30 86
24 93 161 162 188 34 125 12 7.7 25 15 33 121
25 76 267 223 194 74 78 16 8.5 47 11 68 131
26 116 115 157 214 164 129 46 52 51 57 65 102
27 114 100 156 169 118 61 24 45 11 116 136 139
28 103 127 172 238 91 28 17 14 6.9 31 165 177
29 53 44 174 390 82 28 29 20 7.6 19 87 149
30 101   314 297 48 30 27 11 5.1 34 141 71
31 144   281   91   29 13   54   79