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USGS Surface-Water 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 07194800 Illinois River at Savoy, AR


Washington County, Arkansas
Hydrologic Unit Code 11110103
Latitude  36°06'11", Longitude  94°20'40" NAD83
Drainage area 167  square miles
Gage datum 1,018.97 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 1978-10-01 -> 2024-09-30)

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
1 236 152 160 259 421 212 84 42 24 292 145 226
2 174 126 141 202 382 184 92 35 33 104 88 144
3 214 121 415 227 535 143 207 46 78 80 134 114
4 309 238 219 327 492 152 90 39 82 75 96 104
5 274 189 201 229 808 150 70 34 44 68 79 92
6 169 197 150 214 456 217 95 55 32 170 83 90
7 138 191 140 210 248 345 174 38 27 91 179 117
8 117 204 173 439 265 221 144 44 26 68 153 114
9 109 186 210 202 284 183 219 33 51 396 90 96
10 129 153 215 458 404 193 194 62 42 129 66 155
11 298 227 164 280 335 133 108 43 44 200 74 155
12 179 208 207 296 238 108 78 34 35 115 66 103
13 389 221 176 288 254 96 192 50 28 138 56 217
14 266 174 299 241 310 106 85 138 178 114 51 192
15 176 154 213 187 332 85 76 58 85 87 75 181
16 128 158 244 169 300 103 191 42 71 59 99 281
17 115 373 178 152 314 91 78 101 91 52 143 320
18 176 183 563 231 232 114 106 53 69 65 164 279
19 151 153 851 173 194 268 57 58 44 61 466 152
20 120 164 467 203 374 105 44 48 40 50 229 119
21 148 223 372 216 337 92 53 45 31 49 106 141
22 130 214 335 337 245 81 98 33 131 59 139 106
23 134 198 284 636 361 304 51 72 146 54 107 108
24 134 458 353 1,330 483 129 45 41 110 170 108 90
25 181 200 408 1,210 367 88 92 34 53 116 95 118
26 151 166 314 959 395 92 50 34 62 99 79 122
27 124 169 375 326 296 141 67 33 40 97 169 923
28 178 223 301 396 280 82 41 30 34 119 159 464
29 150 70 324 902 209 64 42 27 40 143 123 180
30 152   362 718 219 96 52 25 270 263 400 200
31 217   329   173   53 24   113   204