Provisional Monthly Streamflow Network - Tabular Data: January 2024
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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 |
N/A |
3,631 |
3,190 |
1,406 |
6,916 |
|
| Rock River near Joslin |
9,549 |
84 |
N/A |
6,009 |
5,049 |
2,052 |
12,860 |
|
| Pecatonica River at Freeport |
1,326 |
109 |
N/A |
820 |
663 |
311 |
1,686 |
|
| Green River near Geneseo |
1,003 |
88 |
N/A |
589 |
411 |
103 |
1,429 |
|
| Edwards River near New Boston |
445 |
88 |
N/A |
251 |
140 |
23 |
654 |
|
| Kankakee River at Momence |
2,294 |
111 |
N/A |
2,362 |
2,203 |
780 |
4,643 |
|
| Iroquois River near Chebanse |
2,091 |
100 |
N/A |
2,078 |
1,640 |
151 |
4,773 |
|
| Fox River at Dayton |
2,642 |
109 |
N/A |
1,616 |
1,230 |
439 |
3,426 |
|
| Vermilion River at Pontiac |
579 |
81 |
N/A |
430 |
258 |
11 |
1,084 |
|
| Spoon River at Seville |
1,636 |
109 |
N/A |
1,034 |
651 |
83 |
2,998 |
|
| LaMoine River at Ripley |
1,293 |
103 |
N/A |
640 |
343 |
35 |
1,601 |
|
| Bear Creek near Marcelline |
349 |
80 |
N/A |
150 |
64 |
3 |
517 |
|
| Mackinaw River near Congerville |
767 |
79 |
N/A |
525 |
274 |
26 |
1,507 |
|
| Salt Creek near Greenview |
1,804 |
82 |
N/A |
1,318 |
835 |
134 |
3,377 |
|
| Sangamon River at Monticello |
550 |
114 |
N/A |
450 |
267 |
19 |
1,213 |
|
| So. Fork Sangamon near Rochester |
867 |
74 |
N/A |
700 |
366 |
10 |
2,340 |
|
| Illinois River at Valley City |
26,743 |
85 |
32,500 |
22,043 |
17,030 |
6,760 |
47,630 |
|
| Macoupin Creek near Kane |
868 |
96 |
N/A |
574 |
255 |
7 |
1,623 |
|
| Vermilion River near Danville |
1,290 |
102 |
N/A |
1,232 |
763 |
58 |
3,099 |
|
| Kaskaskia River at Vandalia |
1,940 |
54 |
N/A |
2,635 |
2,109 |
271 |
5,338 |
|
| Shoal Creek near Breese |
735 |
81 |
915 |
744 |
377 |
30 |
2,068 |
|
| Embarras River at Ste. Marie |
1,516 |
112 |
N/A |
1,775 |
1,121 |
91 |
4,590 |
|
| Skillet Fork at Wayne City |
464 |
106 |
N/A |
666 |
380 |
15 |
1,965 |
|
| Little Wabash below Clay City |
1,131 |
109 |
1,736 |
1,490 |
793 |
49 |
4,538 |
|
| Big Muddy at Plumfield |
794 |
53 |
656 |
908 |
735 |
97 |
2,184 |
|
| Cache River at Forman |
244 |
101 |
803 |
510 |
381 |
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 2022. For best results when printing this page, change your layout to "Landscape". Streamflow Data |