Provisional Monthly Streamflow Network - Tabular Data: April 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 |
11,704 |
7,804 |
6,894 |
3,161 |
12,840 |
|
| Rock River near Joslin |
9,549 |
84 |
17,150 |
11,420 |
10,305 |
4,700 |
18,870 |
|
| Pecatonica River at Freeport |
1,326 |
109 |
2,206 |
1,314 |
1,108 |
512 |
2,361 |
|
| Green River near Geneseo |
1,003 |
88 |
1,940 |
1,089 |
984 |
379 |
2,347 |
|
| Edwards River near New Boston |
445 |
88 |
1,391 |
562 |
450 |
149 |
1,230 |
|
| Kankakee River at Momence |
2,294 |
111 |
5,592 |
3,470 |
3,469 |
1,807 |
5,265 |
|
| Iroquois River near Chebanse |
2,091 |
100 |
4,693 |
3,139 |
2,907 |
955 |
5,945 |
|
| Fox River at Dayton |
2,642 |
109 |
5,506 |
3,402 |
3,132 |
1,174 |
5,964 |
|
| Vermilion River at Pontiac |
579 |
81 |
1,072 |
796 |
673 |
191 |
1,644 |
|
| Spoon River at Seville |
1,636 |
109 |
2,946 |
1,923 |
1,532 |
395 |
4,055 |
|
| LaMoine River at Ripley |
1,293 |
103 |
1,849 |
1,579 |
1,279 |
234 |
3,284 |
|
| Bear Creek near Marcelline |
349 |
80 |
969 |
417 |
304 |
42 |
897 |
|
| Mackinaw River near Congerville |
767 |
79 |
1,275 |
1,059 |
919 |
226 |
2,077 |
|
| Salt Creek near Greenview |
1,804 |
82 |
2,333 |
2,394 |
2,001 |
793 |
4,521 |
|
| Sangamon River at Monticello |
550 |
114 |
660 |
792 |
674 |
194 |
1,648 |
|
| So. Fork Sangamon near Rochester |
867 |
74 |
1,738 |
1,081 |
817 |
153 |
2,243 |
|
| Illinois River at Valley City |
26,743 |
85 |
46,683 |
37,653 |
34,680 |
15,840 |
61,280 |
|
| Macoupin Creek near Kane |
868 |
96 |
1,284 |
1,132 |
704 |
129 |
2,864 |
|
| Vermilion River near Danville |
1,290 |
102 |
2,728 |
1,891 |
1,599 |
537 |
3,786 |
|
| Kaskaskia River at Vandalia |
1,940 |
54 |
3,347 |
2,648 |
2,066 |
515 |
5,594 |
|
| Shoal Creek near Breese |
735 |
81 |
1,440 |
1,047 |
699 |
174 |
2,236 |
|
| Embarras River at Ste. Marie |
1,516 |
112 |
2,831 |
2,298 |
1,797 |
543 |
4,787 |
|
| Skillet Fork at Wayne City |
464 |
106 |
1,144 |
821 |
725 |
117 |
1,910 |
|
| Little Wabash below Clay City |
1,131 |
109 |
2,469 |
1,739 |
1,274 |
195 |
3,840 |
|
| Big Muddy at Plumfield |
794 |
53 |
584 |
1,538 |
1,313 |
431 |
3,113 |
|
| Cache River at Forman |
244 |
101 |
324 |
591 |
528 |
112 |
1,190 |
|
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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 |