Provisional Monthly Streamflow Network - Tabular Data: December 2022
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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 |
83 |
4,532 |
3,689 |
3,230 |
1,288 |
6,242 |
|
| Rock River near Joslin |
9,549 |
83 |
7,207 |
5,683 |
5,107 |
1,984 |
10,200 |
|
| Pecatonica River at Freeport |
1,326 |
108 |
1,241 |
754 |
635 |
303 |
1,435 |
|
| Green River near Geneseo |
1,003 |
86 |
666 |
532 |
412 |
87 |
1,373 |
|
| Edwards River near New Boston |
445 |
88 |
N/A |
207 |
121 |
16 |
504 |
|
| Kankakee River at Momence |
2,294 |
108 |
1,190 |
2,082 |
1,872 |
833 |
3,787 |
|
| Iroquois River near Chebanse |
2,091 |
99 |
1,214 |
1,629 |
1,090 |
132 |
4,236 |
|
| Fox River at Dayton |
2,642 |
108 |
1,639 |
1,649 |
1,351 |
492 |
3,459 |
|
| Vermilion River at Pontiac |
579 |
80 |
133 |
394 |
170 |
8 |
1,070 |
|
| Spoon River at Seville |
1,636 |
108 |
203 |
746 |
401 |
65 |
1,905 |
|
| LaMoine River at Ripley |
1,293 |
101 |
175 |
550 |
238 |
28 |
1,472 |
|
| Bear Creek near Marcelline |
349 |
78 |
71 |
162 |
33 |
1 |
556 |
|
| Mackinaw River near Congerville |
767 |
78 |
122 |
467 |
226 |
15 |
1,493 |
|
| Salt Creek near Greenview |
1,804 |
81 |
693 |
1,114 |
591 |
106 |
2,837 |
|
| Sangamon River at Monticello |
550 |
112 |
124 |
374 |
180 |
12 |
1,118 |
|
| So. Fork Sangamon near Rochester |
867 |
73 |
435 |
575 |
147 |
8 |
1,694 |
|
| Illinois River at Valley City |
26,743 |
84 |
11,487 |
18,688 |
15,810 |
6,778 |
37,150 |
|
| Macoupin Creek near Kane |
868 |
94 |
298 |
512 |
155 |
8 |
1,514 |
|
| Vermilion River near Danville |
1,290 |
101 |
501 |
981 |
564 |
62 |
2,625 |
|
| Kaskaskia River at Vandalia |
1,940 |
53 |
229 |
1,992 |
1,624 |
282 |
5,780 |
|
| Shoal Creek near Breese |
735 |
80 |
377 |
617 |
196 |
19 |
1,762 |
|
| Embarras River at Ste. Marie |
1,516 |
111 |
148 |
1,324 |
833 |
39 |
3,501 |
|
| Skillet Fork at Wayne City |
464 |
104 |
91 |
470 |
227 |
5 |
1,264 |
|
| Little Wabash below Clay City |
1,131 |
108 |
243 |
1,107 |
533 |
22 |
3,525 |
|
| Big Muddy at Plumfield |
794 |
52 |
81 |
699 |
368 |
52 |
1,877 |
|
| Cache River at Forman |
244 |
100 |
66 |
362 |
215 |
16 |
931 |
|
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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 calculated from past monthly mean flow values retrieved from U.S. Geological Survey (USGS) data services this month. For best results when printing this page, change your layout to "Landscape". Streamflow Data |