Provisional Monthly Streamflow Network - Tabular Data: November 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 |
2,886 |
3,873 |
3,451 |
1,397 |
6,917 |
|
| Rock River near Joslin |
9,549 |
84 |
4,047 |
5,656 |
4,996 |
2,067 |
10,120 |
|
| Pecatonica River at Freeport |
1,326 |
109 |
692 |
810 |
698 |
334 |
1,447 |
|
| Green River near Geneseo |
1,003 |
88 |
320 |
463 |
350 |
82 |
1,195 |
|
| Edwards River near New Boston |
445 |
88 |
52 |
169 |
86 |
19 |
447 |
|
| Kankakee River at Momence |
2,294 |
111 |
1,212 |
1,631 |
1,362 |
692 |
2,978 |
|
| Iroquois River near Chebanse |
2,091 |
100 |
377 |
1,010 |
530 |
97 |
2,598 |
|
| Fox River at Dayton |
2,642 |
109 |
1,348 |
1,576 |
1,375 |
506 |
3,334 |
|
| Vermilion River at Pontiac |
579 |
81 |
78 |
250 |
70 |
7 |
764 |
|
| Spoon River at Seville |
1,636 |
109 |
137 |
620 |
329 |
64 |
1,649 |
|
| LaMoine River at Ripley |
1,293 |
103 |
24 |
519 |
193 |
24 |
1,280 |
|
| Bear Creek near Marcelline |
349 |
80 |
1 |
148 |
24 |
1 |
532 |
|
| Mackinaw River near Congerville |
767 |
79 |
176 |
296 |
75 |
12 |
962 |
|
| Salt Creek near Greenview |
1,804 |
82 |
453 |
829 |
343 |
121 |
2,405 |
|
| Sangamon River at Monticello |
550 |
114 |
52 |
251 |
86 |
9 |
771 |
|
| So. Fork Sangamon near Rochester |
867 |
74 |
24 |
295 |
73 |
4 |
807 |
|
| Illinois River at Valley City |
26,743 |
85 |
8,322 |
15,260 |
11,530 |
5,949 |
34,520 |
|
| Macoupin Creek near Kane |
868 |
96 |
16 |
322 |
90 |
9 |
847 |
|
| Vermilion River near Danville |
1,290 |
102 |
131 |
632 |
307 |
53 |
1,508 |
|
| Kaskaskia River at Vandalia |
1,940 |
54 |
55 |
899 |
665 |
65 |
2,239 |
|
| Shoal Creek near Breese |
735 |
81 |
45 |
327 |
139 |
18 |
865 |
|
| Embarras River at Ste. Marie |
1,516 |
112 |
56 |
736 |
338 |
29 |
1,817 |
|
| Skillet Fork at Wayne City |
464 |
106 |
5 |
269 |
90 |
2 |
771 |
|
| Little Wabash below Clay City |
1,131 |
109 |
12 |
590 |
261 |
14 |
1,760 |
|
| Big Muddy at Plumfield |
794 |
53 |
50 |
384 |
153 |
42 |
1,063 |
|
| Cache River at Forman |
244 |
101 |
7 |
195 |
87 |
4 |
571 |
|
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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 2022. For best results when printing this page, change your layout to "Landscape". Streamflow Data |