Provisional Monthly Streamflow Network - Tabular Data: March 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 |
85 |
5,604 |
7,597 |
7,332 |
2,949 |
12,630 |
|
| Rock River near Joslin |
9,549 |
85 |
8,383 |
11,452 |
10,700 |
4,826 |
18,310 |
|
| Pecatonica River at Freeport |
1,326 |
110 |
995 |
1,799 |
1,625 |
671 |
3,209 |
|
| Green River near Geneseo |
1,003 |
88 |
1,077 |
1,104 |
941 |
398 |
2,266 |
|
| Edwards River near New Boston |
445 |
90 |
405 |
531 |
415 |
138 |
1,069 |
|
| Kankakee River at Momence |
2,294 |
109 |
3,296 |
3,373 |
3,284 |
1,681 |
5,157 |
|
| Iroquois River near Chebanse |
2,091 |
101 |
1,652 |
3,186 |
2,790 |
859 |
6,270 |
|
| Fox River at Dayton |
2,642 |
110 |
3,511 |
3,421 |
3,129 |
1,326 |
5,967 |
|
| Vermilion River at Pontiac |
579 |
82 |
312 |
759 |
674 |
139 |
1,567 |
|
| Spoon River at Seville |
1,636 |
110 |
1,648 |
1,739 |
1,335 |
449 |
4,009 |
|
| LaMoine River at Ripley |
1,293 |
103 |
440 |
1,333 |
964 |
281 |
3,486 |
|
| Bear Creek near Marcelline |
349 |
80 |
27 |
377 |
249 |
42 |
1,002 |
|
| Mackinaw River near Congerville |
767 |
80 |
405 |
955 |
796 |
138 |
2,440 |
|
| Salt Creek near Greenview |
1,804 |
83 |
922 |
2,125 |
1,785 |
470 |
4,212 |
|
| Sangamon River at Monticello |
550 |
115 |
441 |
715 |
613 |
150 |
1,370 |
|
| So. Fork Sangamon near Rochester |
867 |
75 |
380 |
1,015 |
777 |
137 |
2,059 |
|
| Illinois River at Valley City |
26,743 |
86 |
29,868 |
35,103 |
31,420 |
13,470 |
55,520 |
|
| Macoupin Creek near Kane |
868 |
96 |
284 |
899 |
636 |
116 |
2,254 |
|
| Vermilion River near Danville |
1,290 |
103 |
829 |
1,764 |
1,508 |
507 |
3,125 |
|
| Kaskaskia River at Vandalia |
1,940 |
55 |
1,434 |
3,027 |
2,683 |
594 |
6,037 |
|
| Shoal Creek near Breese |
735 |
83 |
226 |
1,001 |
880 |
182 |
2,218 |
|
| Embarras River at Ste. Marie |
1,516 |
113 |
685 |
2,247 |
2,078 |
523 |
4,495 |
|
| Skillet Fork at Wayne City |
464 |
108 |
240 |
855 |
747 |
126 |
1,870 |
|
| Little Wabash below Clay City |
1,131 |
110 |
396 |
1,820 |
1,591 |
295 |
3,624 |
|
| Big Muddy at Plumfield |
794 |
54 |
233 |
1,440 |
1,188 |
367 |
2,616 |
|
| Cache River at Forman |
244 |
102 |
160 |
641 |
465 |
225 |
1,319 |
|
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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 |