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Provisional Mean Flows for February 2009 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
|
6,487
|
3,902
|
3,342
|
1,586
|
7,336
|
|
5446500
|
Rock River near Joslin [graph]
|
9,549
|
65
|
14,750
|
6,403
|
5,504
|
2,486
|
12,000
|
|
5435500
|
Pecatonica River at Freeport [graph]
|
1,326
|
89
|
1,855
|
1,113
|
904
|
396
|
2,149
|
|
5447500
|
Green River near Geneseo [graph]
|
1,003
|
69
|
2,000
|
741
|
689
|
130
|
1,439
|
|
5466500
|
Edwards River near New Boston [graph]
|
445
|
70
|
683
|
360
|
302
|
45
|
667
|
|
5520500
|
Kankakee River at Momence [graph]
|
2,294
|
90
|
4,500
|
2,516
|
2,491
|
1,050
|
4,133
|
|
5526000
|
Iroquois River near Chebanse [graph]
|
2,091
|
84
|
4,360
|
2,519
|
2,133
|
347
|
6,178
|
|
5552500
|
Fox River at Dayton [graph]
|
2,642
|
88
|
5,500
|
2,045
|
1,570
|
527
|
3,860
|
|
5554500
|
Vermilion River at Pontiac [graph]
|
579
|
64
|
804
|
511
|
368
|
25
|
1,315
|
|
5570000
|
Spoon River at Seville [graph]
|
1,636
|
91
|
1,930
|
1,439
|
1,336
|
206
|
2,936
|
|
5585000
|
LaMoine River at Ripley [graph]
|
1,293
|
84
|
782
|
1,034
|
751
|
95
|
2,214
|
|
5495500
|
Bear Creek near Marcelline [graph]
|
349
|
63
|
187
|
261
|
165
|
13
|
598
|
|
5567500
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Mackinaw River near Congerville [graph]
|
767
|
59
|
896
|
639
|
531
|
60
|
1,616
|
|
5582000
|
Salt Creek near Greenview [graph]
|
1,804
|
66
|
2,082
|
1,675
|
1,349
|
258
|
3,813
|
|
5572000
|
Sangamon River at Monticello [graph]
|
550
|
95
|
502
|
581
|
434
|
50
|
1,345
|
|
5576000
|
So. Fork Sangamon near Rochester [graph]
|
867
|
58
|
1,250
|
877
|
601
|
31
|
2,082
|
|
5586100
|
Illinois River at Valley City [graph]
|
26,743
|
69
|
34,500
|
24,490
|
22,861
|
8,452
|
48,240
|
|
5587000
|
Macoupin Creek near Kane [graph]
|
868
|
79
|
585
|
753
|
464
|
36
|
1,967
|
|
3339000
|
Vermilion River near Danville [graph]
|
1,290
|
86
|
1,800
|
1,433
|
1,022
|
167
|
3,208
|
|
5592500
|
Kaskaskia River at Vandalia [graph]
|
1,940
|
38
|
3,672
|
2,703
|
1,993
|
347
|
6,035
|
|
5594000
|
Shoal Creek near Breese [graph]
|
735
|
64
|
1,665
|
895
|
536
|
69
|
2,189
|
|
3345500
|
Embarras River at Ste. Marie [graph]
|
1,516
|
94
|
4,166
|
1,913
|
1,580
|
203
|
4,088
|
|
3380500
|
Skillet Fork at Wayne City [graph]
|
464
|
88
|
1,612
|
650
|
491
|
41
|
1,747
|
|
3379500
|
Little Wabash below Clay City [graph]
|
1,131
|
93
|
2,617
|
1,518
|
1,173
|
126
|
3,568
|
|
5597000
|
Big Muddy at Plumfield [graph]
|
794
|
37
|
841
|
1,039
|
1,077
|
145
|
2,048
|
|
3612000
|
Cache River at Forman [graph]
|
244
|
84
|
788
|
491
|
433
|
76
|
943
|
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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