Provisional Monthly Streamflow Network - Data Details, Illinois State Water Survey

Water and Atmospheric Resources Monitoring Program (WARM)

Weather Soil Groundwater Sediment Streamflow Reservoirs

Provisional Monthly Streamflow Network - Tabular Data: January 2017

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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

81

N/A

3,373

3,000

1,406

5,729

5437500

 Rock River near Joslin

9,549

73

N/A

5,614

4,639

2,029

10,830

5446500

 Pecatonica River at Freeport

1,326

97

2,008

771

640

309

1,469

5435500

 Green River near Geneseo

1,003

77

1,226

558

368

86

1,261

5447500

 Edwards River near New Boston

445

78

454

247

139

23

635

5466500

 Kankakee River at Momence

2,294

98

4,451

2,321

2,106

744

4,624

5520500

 Iroquois River near Chebanse

2,091

92

4,585

2,029

1,544

139

4,773

5526000

 Fox River at Dayton

2,642

96

3,551

1,537

1,157

430

3,176

5552500

 Vermilion River at Pontiac

579

72

1,113

419

258

10

1,015

5554500

 Spoon River at Seville

1,636

99

1,466

1,029

663

78

2,998

5570000

 LaMoine River at Ripley

1,293

92

423

636

346

36

1,596

5585000

 Bear Creek near Marcelline

349

71

62

152

64

3

436

5495500

 Mackinaw River near Congerville

767

67

925

520

296

17

1,507

5567500

 Salt Creek near Greenview

1,804

74

1,485

1,274

835

133

2,984

5582000

 Sangamon River at Monticello

550

103

817

442

266

18

1,213

5572000

 So. Fork Sangamon near Rochester

867

66

533

637

298

11

1,881

5576000

 Illinois River at Valley City

26,743

77

28,700

21,110

17,030

6,477

47,160

5586100

 Macoupin Creek near Kane

868

87

240

549

225

7

1,351

5587000

 Vermilion River near Danville

1,290

94

2,243

1,207

704

57

3,099

3339000

 Kaskaskia River at Vandalia

1,940

46

2,468

2,535

2,029

156

4,962

5592500

 Shoal Creek near Breese

735

72

652

693

333

27

1,675

5594000

 Embarras River at Ste. Marie

1,516

102

2,669

1,721

1,121

89

4,139

3345500

 Skillet Fork at Wayne City

464

96

554

654

362

13

1,648

3380500

 Little Wabash below Clay City

1,131

101

1,982

1,434

728

49

3,937

3379500

 Big Muddy at Plumfield

794

45

559

841

735

80

1,855

5597000

 Cache River at Forman

244

92

269

492

367

34

1,109

3612000



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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 2015.

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Streamflow Data



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