Provisional Monthly Streamflow Network - Tabular Data: January 2023
Choose another month|
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 |
6,236 |
3,600 |
3,173 |
1,406 |
6,916 |
|
| Rock River near Joslin |
9,549 |
84 |
N/A |
5,967 |
4,932 |
2,052 |
12,860 |
|
| Pecatonica River at Freeport |
1,326 |
109 |
1,436 |
814 |
662 |
311 |
1,686 |
|
| Green River near Geneseo |
1,003 |
88 |
851 |
586 |
405 |
103 |
1,429 |
|
| Edwards River near New Boston |
445 |
88 |
N/A |
252 |
141 |
23 |
654 |
|
| Kankakee River at Momence |
2,294 |
111 |
1,589 |
2,369 |
2,216 |
780 |
4,643 |
|
| Iroquois River near Chebanse |
2,091 |
100 |
1,570 |
2,084 |
1,679 |
139 |
4,794 |
|
| Fox River at Dayton |
2,642 |
109 |
2,022 |
1,612 |
1,220 |
439 |
3,426 |
|
| Vermilion River at Pontiac |
579 |
81 |
160 |
434 |
260 |
11 |
1,084 |
|
| Spoon River at Seville |
1,636 |
109 |
431 |
1,039 |
657 |
83 |
2,998 |
|
| LaMoine River at Ripley |
1,293 |
103 |
140 |
645 |
345 |
35 |
1,601 |
|
| Bear Creek near Marcelline |
349 |
80 |
57 |
152 |
64 |
3 |
517 |
|
| Mackinaw River near Congerville |
767 |
79 |
140 |
530 |
285 |
26 |
1,507 |
|
| Salt Creek near Greenview |
1,804 |
82 |
646 |
1,326 |
860 |
134 |
3,377 |
|
| Sangamon River at Monticello |
550 |
114 |
284 |
451 |
258 |
19 |
1,213 |
|
| So. Fork Sangamon near Rochester |
867 |
74 |
766 |
699 |
348 |
10 |
2,340 |
|
| Illinois River at Valley City |
26,743 |
85 |
16,400 |
22,121 |
17,120 |
6,760 |
47,630 |
|
| Macoupin Creek near Kane |
868 |
96 |
381 |
576 |
242 |
7 |
1,623 |
|
| Vermilion River near Danville |
1,290 |
102 |
924 |
1,236 |
715 |
58 |
3,099 |
|
| Kaskaskia River at Vandalia |
1,940 |
54 |
1,212 |
2,662 |
2,126 |
271 |
5,338 |
|
| Shoal Creek near Breese |
735 |
81 |
898 |
743 |
372 |
30 |
2,068 |
|
| Embarras River at Ste. Marie |
1,516 |
112 |
1,069 |
1,781 |
1,132 |
91 |
4,590 |
|
| Skillet Fork at Wayne City |
464 |
106 |
600 |
666 |
374 |
15 |
1,965 |
|
| Little Wabash below Clay City |
1,131 |
109 |
1,596 |
1,489 |
790 |
49 |
4,538 |
|
| Big Muddy at Plumfield |
794 |
53 |
674 |
913 |
757 |
97 |
2,184 |
|
| Cache River at Forman |
244 |
101 |
521 |
510 |
377 |
41 |
1,228 |
|
|
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 |