Provisional Monthly Streamflow Network - Tabular Data: June 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 |
11,699 |
5,227 |
4,359 |
1,734 |
10,010 |
|
| Rock River near Joslin |
9,549 |
85 |
14,753 |
8,606 |
7,147 |
3,128 |
17,450 |
|
| Pecatonica River at Freeport |
1,326 |
110 |
2,050 |
1,147 |
942 |
357 |
2,227 |
|
| Green River near Geneseo |
1,003 |
88 |
687 |
1,026 |
882 |
239 |
2,431 |
|
| Edwards River near New Boston |
445 |
90 |
250 |
509 |
403 |
65 |
1,254 |
|
| Kankakee River at Momence |
2,294 |
109 |
2,011 |
2,326 |
2,079 |
1,002 |
3,931 |
|
| Iroquois River near Chebanse |
2,091 |
101 |
825 |
2,299 |
1,726 |
417 |
5,013 |
|
| Fox River at Dayton |
2,642 |
110 |
2,928 |
2,210 |
1,765 |
604 |
5,312 |
|
| Vermilion River at Pontiac |
579 |
82 |
221 |
617 |
406 |
96 |
1,612 |
|
| Spoon River at Seville |
1,636 |
110 |
840 |
1,761 |
1,167 |
282 |
3,937 |
|
| LaMoine River at Ripley |
1,293 |
103 |
252 |
1,327 |
789 |
99 |
3,090 |
|
| Bear Creek near Marcelline |
349 |
80 |
16 |
355 |
135 |
7 |
1,130 |
|
| Mackinaw River near Congerville |
767 |
80 |
547 |
809 |
619 |
111 |
2,073 |
|
| Salt Creek near Greenview |
1,804 |
83 |
978 |
2,006 |
1,411 |
486 |
3,964 |
|
| Sangamon River at Monticello |
550 |
115 |
364 |
554 |
416 |
83 |
1,241 |
|
| So. Fork Sangamon near Rochester |
867 |
75 |
292 |
966 |
592 |
107 |
2,539 |
|
| Illinois River at Valley City |
26,743 |
86 |
26,127 |
32,364 |
28,470 |
10,480 |
66,270 |
|
| Macoupin Creek near Kane |
868 |
96 |
355 |
632 |
340 |
58 |
1,730 |
|
| Vermilion River near Danville |
1,290 |
103 |
849 |
1,363 |
1,057 |
229 |
2,956 |
|
| Kaskaskia River at Vandalia |
1,940 |
55 |
1,018 |
1,836 |
1,673 |
264 |
4,658 |
|
| Shoal Creek near Breese |
735 |
83 |
202 |
596 |
332 |
59 |
1,469 |
|
| Embarras River at Ste. Marie |
1,516 |
113 |
470 |
1,470 |
998 |
215 |
3,509 |
|
| Skillet Fork at Wayne City |
464 |
108 |
131 |
354 |
149 |
11 |
1,117 |
|
| Little Wabash below Clay City |
1,131 |
110 |
171 |
966 |
493 |
55 |
2,706 |
|
| Big Muddy at Plumfield |
794 |
54 |
721 |
820 |
639 |
169 |
1,809 |
|
| Cache River at Forman |
244 |
102 |
230 |
216 |
152 |
9 |
461 |
|
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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 |