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: November 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

4,467

3,598

3,389

1,397

6,216

5437500

 Rock River near Joslin

9,549

73

6,940

5,303

4,842

1,935

9,241

5446500

 Pecatonica River at Freeport

1,326

97

996

769

679

334

1,349

5435500

 Green River near Geneseo

1,003

77

605

455

329

82

1,195

5447500

 Edwards River near New Boston

445

78

87

168

83

18

447

5466500

 Kankakee River at Momence

2,294

98

3,198

1,582

1,270

673

2,795

5520500

 Iroquois River near Chebanse

2,091

92

2,796

983

484

96

2,571

5526000

 Fox River at Dayton

2,642

96

2,588

1,519

1,322

506

3,000

5552500

 Vermilion River at Pontiac

579

72

185

250

64

7

764

5554500

 Spoon River at Seville

1,636

99

206

615

329

64

1,585

5570000

 LaMoine River at Ripley

1,293

92

91

532

198

25

1,280

5585000

 Bear Creek near Marcelline

349

71

13

156

25

1

356

5495500

 Mackinaw River near Congerville

767

67

46

297

70

11

962

5567500

 Salt Creek near Greenview

1,804

74

254

839

283

116

2,405

5582000

 Sangamon River at Monticello

550

103

94

252

83

9

771

5572000

 So. Fork Sangamon near Rochester

867

66

14

302

78

4

807

5576000

 Illinois River at Valley City

26,743

77

18,893

14,790

11,514

5,846

26,577

5586100

 Macoupin Creek near Kane

868

87

21

341

92

8

847

5587000

 Vermilion River near Danville

1,290

94

1,086

625

301

53

1,355

3339000

 Kaskaskia River at Vandalia

1,940

46

255

923

633

65

2,239

5592500

 Shoal Creek near Breese

735

72

97

332

127

15

865

5594000

 Embarras River at Ste. Marie

1,516

102

229

739

326

28

1,817

3345500

 Skillet Fork at Wayne City

464

96

47

267

89

2

734

3380500

 Little Wabash below Clay City

1,131

101

267

586

245

14

1,525

3379500

 Big Muddy at Plumfield

794

45

113

401

130

41

1,063

5597000

 Cache River at Forman

244

92

103

195

87

4

571

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 2016.

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Streamflow Data



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