Provisional Monthly Streamflow Network - Tabular Data: February 2023
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Long-term monthly flows for period of record (cfs) | ||||||||
| Station | Drainage area (sq. mi.) |
Years of record | Monthly mean flow (cfs) | Mean flow* | Median (50% exceedence) flow | 90% exceedence flow | 10% exceedence flow | USGS Station No. |
| Rock River at Rockton |
6,363 |
84 |
6,680 |
4,212 |
3,533 |
1,739 |
7,336 |
|
| Rock River near Joslin |
9,549 |
84 |
10,276 |
7,017 |
5,877 |
2,705 |
12,660 |
|
| Pecatonica River at Freeport |
1,326 |
109 |
N/A |
1,152 |
904 |
434 |
2,317 |
|
| Green River near Geneseo |
1,003 |
88 |
1,236 |
798 |
692 |
131 |
1,545 |
|
| Edwards River near New Boston |
445 |
88 |
N/A |
382 |
312 |
45 |
821 |
|
| Kankakee River at Momence |
2,294 |
111 |
2,076 |
2,620 |
2,548 |
1,050 |
4,610 |
|
| Iroquois River near Chebanse |
2,091 |
100 |
3,261 |
2,626 |
2,107 |
372 |
6,314 |
|
| Fox River at Dayton |
2,642 |
109 |
3,268 |
2,175 |
1,898 |
613 |
4,057 |
|
| Vermilion River at Pontiac |
579 |
81 |
534 |
552 |
402 |
47 |
1,401 |
|
| Spoon River at Seville |
1,636 |
109 |
833 |
1,470 |
1,336 |
206 |
3,208 |
|
| LaMoine River at Ripley |
1,293 |
103 |
680 |
1,038 |
745 |
121 |
2,197 |
|
| Bear Creek near Marcelline |
349 |
80 |
238 |
266 |
171 |
14 |
650 |
|
| Mackinaw River near Congerville |
767 |
79 |
520 |
685 |
535 |
62 |
1,628 |
|
| Salt Creek near Greenview |
1,804 |
82 |
1,614 |
1,740 |
1,352 |
260 |
4,359 |
|
| Sangamon River at Monticello |
550 |
114 |
623 |
600 |
443 |
52 |
1,345 |
|
| So. Fork Sangamon near Rochester |
867 |
74 |
467 |
886 |
602 |
31 |
2,068 |
|
| Illinois River at Valley City |
26,743 |
85 |
21,500 |
25,433 |
23,995 |
8,753 |
48,350 |
|
| Macoupin Creek near Kane |
868 |
96 |
303 |
756 |
490 |
39 |
1,752 |
|
| Vermilion River near Danville |
1,290 |
102 |
1,600 |
1,528 |
1,081 |
229 |
3,308 |
|
| Kaskaskia River at Vandalia |
1,940 |
54 |
1,860 |
2,805 |
2,398 |
630 |
6,035 |
|
| Shoal Creek near Breese |
735 |
81 |
418 |
912 |
678 |
85 |
2,147 |
|
| Embarras River at Ste. Marie |
1,516 |
112 |
913 |
1,980 |
1,637 |
240 |
4,117 |
|
| Skillet Fork at Wayne City |
464 |
106 |
388 |
681 |
525 |
49 |
1,758 |
|
| Little Wabash below Clay City |
1,131 |
109 |
909 |
1,578 |
1,205 |
158 |
3,718 |
|
| Big Muddy at Plumfield |
794 |
53 |
1,138 |
1,076 |
1,068 |
198 |
2,048 |
|
| Cache River at Forman |
244 |
101 |
853 |
514 |
437 |
78 |
970 |
|
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Choose another month Station Numbers are linked to the U.S. Geological Survey, providing more information about each station. Notes: Much below normal flow = 90-100% chance of exceedence. Below normal flow = 70-90% chance of exceedence. Normal flow = 30-70% chance of exceedence. Above normal flow = 10-30% chance of exceedence. Much above normal flow = 0-10% chance of exceedence. * As reported in U.S. Geological Survey (USGS) Water Resources Data, Illinois, Water Year 2021. For best results when printing this page, change your layout to "Landscape". Streamflow Data |