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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 05579500 LAKE FORK NEAR CORNLAND, IL


Logan County, Illinois
Hydrologic Unit Code 07130009
Latitude  39°57'06.36", Longitude  89°23'08.41" NAD83
Drainage area 214  square miles
Gage datum 554.73 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 1947-10-01 -> 2025-09-30)

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
1 211 173 201 260 389 240 189 99 41 51 95 135
2 176 169 215 238 369 243 180 122 41 52 110 135
3 160 182 221 245 331 245 161 156 46 55 94 174
4 164 189 281 263 302 224 154 131 39 53 82 199
5 176 198 300 260 320 244 172 104 32 47 76 171
6 170 192 267 269 324 248 165 104 26 44 68 150
7 155 217 253 265 314 229 143 101 35 52 63 147
8 143 213 241 247 330 218 133 92 45 55 58 141
9 136 205 233 231 328 218 140 70 47 70 54 126
10 142 223 233 215 305 205 145 58 41 70 57 117
11 162 210 236 236 307 215 150 59 46 66 60 120
12 156 216 251 331 313 255 187 54 37 60 59 157
13 158 193 260 310 333 289 189 60 30 61 69 139
14 194 176 265 293 342 311 189 50 47 67 74 128
15 200 165 258 291 305 315 143 53 65 64 82 138
16 173 176 247 284 305 327 130 54 74 61 82 145
17 140 203 233 261 373 273 121 44 55 64 92 136
18 135 214 245 244 393 225 104 42 43 62 106 122
19 147 216 280 256 373 217 93 36 44 59 127 113
20 156 230 300 286 350 212 92 35 46 54 145 110
21 148 259 311 324 309 240 89 33 41 53 116 134
22 148 323 269 347 266 297 121 33 40 48 97 159
23 177 325 246 322 241 347 115 44 56 67 93 154
24 202 292 237 294 228 291 96 46 48 73 91 160
25 182 285 234 329 240 259 79 35 47 77 94 158
26 172 256 232 332 296 245 89 43 47 72 97 148
27 165 224 247 335 292 242 115 34 44 74 110 158
28 166 198 257 364 279 237 121 31 38 67 144 170
29 173 151 249 347 253 231 103 38 43 66 114 205
30 181   259 356 235 211 91 38 40 83 114 239
31 170   275   234   98 33   90   225