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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
1 211 174 203 263 392 240 189 99 41 51 95 135
2 176 170 217 240 370 243 180 122 41 52 110 135
3 160 184 224 243 332 245 161 156 46 55 94 174
4 164 191 284 261 303 224 154 131 39 53 82 199
5 176 200 303 255 321 244 172 104 32 47 76 171
6 170 194 269 264 325 248 165 104 26 44 68 150
7 155 219 255 262 316 229 143 101 35 52 63 147
8 143 215 243 245 332 218 133 92 45 55 58 141
9 136 207 235 230 330 218 140 70 47 70 54 126
10 142 225 235 214 307 205 145 58 41 70 57 117
11 162 212 239 236 309 215 150 59 46 66 60 120
12 156 218 254 332 316 255 187 54 37 60 59 157
13 158 194 263 311 336 289 189 60 30 61 69 139
14 194 178 268 295 345 311 189 50 47 67 74 128
15 200 167 260 292 308 315 143 53 65 64 82 138
16 173 178 248 285 307 327 130 54 74 61 82 145
17 140 205 235 262 376 273 121 44 55 64 92 136
18 135 217 247 245 397 225 104 42 43 62 106 122
19 147 218 283 257 376 217 93 36 44 59 127 113
20 156 233 302 288 351 212 92 35 46 54 145 110
21 148 262 314 323 305 240 89 33 41 53 116 134
22 148 326 271 346 264 297 121 33 40 48 97 159
23 177 329 248 322 240 347 115 44 56 67 93 154
24 202 295 240 295 228 291 96 46 48 73 91 160
25 182 288 236 331 240 259 79 35 47 77 94 158
26 172 259 234 333 297 245 89 43 47 72 97 148
27 165 227 250 337 294 242 115 34 44 74 110 158
28 166 201 259 366 281 237 121 31 38 67 144 170
29 173 151 252 349 253 231 103 38 43 66 114 205
30 181   262 359 235 211 91 38 40 83 114 239
31 171   277   234   98 33   90   225