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Provisional Mean Flows for October 2008 Choose another month
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Long-term
monthly flows for period of record (cfs) |
| Station No. |
Station |
Drainage area
(sq. mi.) |
Years of record |
Monthly
mean flow (cfs) |
Mean flow* |
Median (50% exceedence) flow |
90% exceedence flow |
10% exceedence flow |
|
5437500
|
Rock River at Rockton [graph]
|
6,363
|
73
|
4,610
|
3,099
|
2,692
|
1,091
|
5,736
|
|
5446500
|
Rock River near Joslin [graph]
|
9,549
|
65
|
6,357
|
4,511
|
3,898
|
1,523
|
8,614
|
|
5435500
|
Pecatonica River at Freeport [graph]
|
1,326
|
89
|
1,022
|
692
|
590
|
311
|
1,334
|
|
5447500
|
Green River near Geneseo [graph]
|
1,003
|
69
|
901
|
369
|
211
|
66
|
963
|
|
5466500
|
Edwards River near New Boston [graph]
|
445
|
70
|
299
|
136
|
46
|
13
|
390
|
|
5520500
|
Kankakee River at Momence [graph]
|
2,294
|
90
|
3,051
|
1,205
|
914
|
596
|
2,257
|
|
5526000
|
Iroquois River near Chebanse [graph]
|
2,091
|
84
|
897
|
741
|
193
|
58
|
1,923
|
|
5552500
|
Fox River at Dayton [graph]
|
2,642
|
88
|
2,323
|
1,131
|
807
|
313
|
2,099
|
|
5554500
|
Vermilion River at Pontiac [graph]
|
579
|
64
|
460
|
136
|
19
|
2
|
378
|
|
5570000
|
Spoon River at Seville [graph]
|
1,636
|
91
|
604
|
520
|
181
|
56
|
1,143
|
|
5585000
|
LaMoine River at Ripley [graph]
|
1,293
|
84
|
661
|
424
|
114
|
25
|
1,255
|
|
5495500
|
Bear Creek near Marcelline [graph]
|
349
|
63
|
43
|
113
|
13
|
1
|
212
|
|
5567500
|
Mackinaw River near Congerville [graph]
|
767
|
59
|
658
|
180
|
30
|
6
|
429
|
|
5582000
|
Salt Creek near Greenview [graph]
|
1,804
|
66
|
1,088
|
498
|
213
|
104
|
998
|
|
5572000
|
Sangamon River at Monticello [graph]
|
550
|
95
|
253
|
168
|
34
|
8
|
591
|
|
5576000
|
So. Fork Sangamon near Rochester [graph]
|
867
|
58
|
234
|
190
|
25
|
2
|
357
|
|
5586100
|
Illinois River at Valley City [graph]
|
26,743
|
69
|
39,570
|
12,470
|
8,046
|
5,384
|
28,458
|
|
5587000
|
Macoupin Creek near Kane [graph]
|
868
|
79
|
154
|
221
|
43
|
5
|
613
|
|
3339000
|
Vermilion River near Danville [graph]
|
1,290
|
86
|
300
|
354
|
104
|
39
|
910
|
|
5592500
|
Kaskaskia River at Vandalia [graph]
|
1,940
|
38
|
1,433
|
574
|
191
|
53
|
1,854
|
|
5594000
|
Shoal Creek near Breese [graph]
|
735
|
64
|
69
|
171
|
45
|
7
|
538
|
|
3345500
|
Embarras River at Ste. Marie [graph]
|
1,516
|
94
|
210
|
442
|
108
|
29
|
1,064
|
|
3380500
|
Skillet Fork at Wayne City [graph]
|
464
|
88
|
279
|
101
|
11
|
0
|
285
|
|
3379500
|
Little Wabash below Clay City [graph]
|
1,131
|
93
|
280
|
221
|
51
|
6
|
659
|
|
5597000
|
Big Muddy at Plumfield [graph]
|
794
|
37
|
111
|
116
|
58
|
32
|
386
|
|
3612000
|
Cache River at Forman [graph]
|
244
|
84
|
16
|
58
|
16
|
1
|
181
|
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 2007.
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