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Provisional Mean Flows for January 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
|
7,508
|
3,240
|
2,795
|
1,329
|
5,490
|
|
5446500
|
Rock River near Joslin [graph]
|
9,549
|
65
|
16,000
|
5,227
|
4,332
|
2,000
|
9,432
|
|
5435500
|
Pecatonica River at Freeport [graph]
|
1,326
|
89
|
1,047
|
748
|
615
|
295
|
1,330
|
|
5447500
|
Green River near Geneseo [graph]
|
1,003
|
69
|
1,724
|
530
|
350
|
82
|
1,256
|
|
5466500
|
Edwards River near New Boston [graph]
|
445
|
70
|
580
|
239
|
132
|
23
|
604
|
|
5520500
|
Kankakee River at Momence [graph]
|
2,294
|
90
|
N/A
|
2,266
|
1,940
|
744
|
4,379
|
|
5526000
|
Iroquois River near Chebanse [graph]
|
2,091
|
84
|
5,800
|
1,986
|
1,401
|
126
|
4,773
|
|
5552500
|
Fox River at Dayton [graph]
|
2,642
|
88
|
4,776
|
1,485
|
1,111
|
429
|
3,098
|
|
5554500
|
Vermilion River at Pontiac [graph]
|
579
|
64
|
416
|
400
|
258
|
10
|
1,015
|
|
5570000
|
Spoon River at Seville [graph]
|
1,636
|
91
|
1,926
|
1,023
|
663
|
78
|
2,908
|
|
5585000
|
LaMoine River at Ripley [graph]
|
1,293
|
84
|
1,410
|
632
|
349
|
35
|
1,596
|
|
5495500
|
Bear Creek near Marcelline [graph]
|
349
|
63
|
72
|
156
|
65
|
2
|
436
|
|
5567500
|
Mackinaw River near Congerville [graph]
|
767
|
59
|
700
|
496
|
255
|
14
|
1,507
|
|
5582000
|
Salt Creek near Greenview [graph]
|
1,804
|
66
|
2,082
|
1,258
|
809
|
127
|
2,782
|
|
5572000
|
Sangamon River at Monticello [graph]
|
550
|
95
|
494
|
441
|
266
|
17
|
1,213
|
|
5576000
|
So. Fork Sangamon near Rochester [graph]
|
867
|
58
|
N/A
|
664
|
298
|
10
|
1,885
|
|
5586100
|
Illinois River at Valley City [graph]
|
26,743
|
69
|
52,460
|
20,350
|
16,452
|
6,474
|
45,548
|
|
5587000
|
Macoupin Creek near Kane [graph]
|
868
|
79
|
289
|
576
|
228
|
7
|
1,609
|
|
3339000
|
Vermilion River near Danville [graph]
|
1,290
|
86
|
N/A
|
1,206
|
637
|
50
|
3,200
|
|
5592500
|
Kaskaskia River at Vandalia [graph]
|
1,940
|
38
|
3,875
|
2,547
|
2,109
|
150
|
4,962
|
|
5594000
|
Shoal Creek near Breese [graph]
|
735
|
64
|
790
|
721
|
327
|
26
|
1,697
|
|
3345500
|
Embarras River at Ste. Marie [graph]
|
1,516
|
94
|
1,620
|
1,745
|
1,056
|
86
|
4,590
|
|
3380500
|
Skillet Fork at Wayne City [graph]
|
464
|
88
|
296
|
666
|
362
|
12
|
1,965
|
|
3379500
|
Little Wabash below Clay City [graph]
|
1,131
|
93
|
992
|
1,457
|
631
|
49
|
4,367
|
|
5597000
|
Big Muddy at Plumfield [graph]
|
794
|
37
|
149
|
880
|
627
|
43
|
2,180
|
|
3612000
|
Cache River at Forman [graph]
|
244
|
84
|
66
|
506
|
360
|
29
|
1,110
|
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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