Provisional Monthly Streamflow Network - Tabular Data: February 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 |
5,445 |
4,241 |
3,564 |
1,739 |
7,336 |
|
| Rock River near Joslin |
9,549 |
85 |
8,874 |
7,056 |
5,894 |
2,705 |
12,660 |
|
| Pecatonica River at Freeport |
1,326 |
110 |
998 |
1,156 |
906 |
434 |
2,317 |
|
| Green River near Geneseo |
1,003 |
88 |
1,246 |
802 |
695 |
131 |
1,545 |
|
| Edwards River near New Boston |
445 |
90 |
476 |
382 |
318 |
45 |
821 |
|
| Kankakee River at Momence |
2,294 |
109 |
3,567 |
2,615 |
2,537 |
1,050 |
4,610 |
|
| Iroquois River near Chebanse |
2,091 |
101 |
2,448 |
2,633 |
2,133 |
381 |
6,256 |
|
| Fox River at Dayton |
2,642 |
110 |
3,276 |
2,185 |
1,915 |
613 |
4,057 |
|
| Vermilion River at Pontiac |
579 |
82 |
482 |
551 |
414 |
47 |
1,401 |
|
| Spoon River at Seville |
1,636 |
110 |
1,510 |
1,464 |
1,336 |
206 |
3,208 |
|
| LaMoine River at Ripley |
1,293 |
103 |
579 |
1,034 |
745 |
121 |
2,197 |
|
| Bear Creek near Marcelline |
349 |
80 |
19 |
266 |
171 |
14 |
650 |
|
| Mackinaw River near Congerville |
767 |
80 |
696 |
683 |
539 |
62 |
1,628 |
|
| Salt Creek near Greenview |
1,804 |
83 |
1,683 |
1,738 |
1,362 |
260 |
4,359 |
|
| Sangamon River at Monticello |
550 |
115 |
482 |
600 |
444 |
52 |
1,345 |
|
| So. Fork Sangamon near Rochester |
867 |
75 |
494 |
881 |
601 |
31 |
2,068 |
|
| Illinois River at Valley City |
26,743 |
86 |
49,752 |
25,380 |
23,990 |
8,753 |
48,350 |
|
| Macoupin Creek near Kane |
868 |
96 |
131 |
752 |
464 |
39 |
1,752 |
|
| Vermilion River near Danville |
1,290 |
103 |
1,114 |
1,528 |
1,090 |
229 |
3,308 |
|
| Kaskaskia River at Vandalia |
1,940 |
55 |
2,655 |
2,787 |
2,365 |
459 |
5,650 |
|
| Shoal Creek near Breese |
735 |
83 |
267 |
906 |
594 |
85 |
2,147 |
|
| Embarras River at Ste. Marie |
1,516 |
113 |
1,085 |
1,971 |
1,623 |
240 |
4,117 |
|
| Skillet Fork at Wayne City |
464 |
108 |
132 |
678 |
518 |
49 |
1,758 |
|
| Little Wabash below Clay City |
1,131 |
110 |
356 |
1,572 |
1,185 |
158 |
3,718 |
|
| Big Muddy at Plumfield |
794 |
54 |
387 |
1,077 |
1,077 |
198 |
2,048 |
|
| Cache River at Forman |
244 |
102 |
147 |
518 |
441 |
78 |
970 |
|
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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 |