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USGS Daily Statistics for Arkansas

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 -> 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
1 236 152 156 253 436 209 82 42 26 282 141 220
2 174 126 137 199 385 179 89 34 33 101 85 141
3 214 121 401 223 527 140 200 45 76 78 130 111
4 309 238 213 318 483 148 87 39 80 73 142 103
5 274 189 195 223 825 150 73 34 44 66 197 91
6 169 197 146 208 473 212 93 54 32 165 98 88
7 138 191 136 205 303 334 169 37 27 88 181 115
8 117 204 169 425 285 215 140 43 26 66 154 112
9 109 186 206 196 319 177 213 33 50 383 128 94
10 129 153 210 443 405 187 189 61 41 125 82 151
11 298 227 161 279 333 129 105 45 44 193 81 155
12 179 208 201 291 237 105 77 35 35 111 70 103
13 389 217 172 282 251 94 186 50 28 134 59 217
14 266 172 290 235 305 103 83 134 173 111 54 192
15 176 152 215 183 325 83 74 57 83 85 76 181
16 128 155 241 166 293 100 185 42 69 58 99 281
17 115 362 176 148 308 89 76 99 89 51 141 320
18 176 179 545 225 230 110 104 54 68 63 165 279
19 151 149 822 168 191 259 56 63 44 60 468 152
20 120 160 452 197 363 102 43 49 39 49 229 119
21 148 217 360 209 327 90 55 46 31 48 109 141
22 130 208 324 326 244 79 98 33 127 58 139 106
23 134 193 276 613 355 294 52 70 142 53 107 108
24 134 443 341 1,280 469 125 45 41 107 164 108 90
25 181 195 430 1,170 356 85 90 33 52 113 95 118
26 151 162 329 925 383 90 49 34 60 96 79 122
27 124 165 372 321 287 137 66 33 39 95 166 923
28 178 217 297 420 272 80 41 30 33 116 156 464
29 150 68 318 915 203 62 42 27 40 139 121 180
30 152   353 704 213 94 51 25 261 255 388 200
31 217   320   169   52 24   112   204