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: February 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

7,528

3,988

3,413

1,688

7,159

5437500

 Rock River near Joslin

9,549

73

10,790

6,670

5,830

2,598

12,000

5446500

 Pecatonica River at Freeport

1,326

97

1,535

1,123

909

426

2,052

5435500

 Green River near Geneseo

1,003

77

483

773

720

131

1,545

5447500

 Edwards River near New Boston

445

78

181

376

311

45

791

5466500

 Kankakee River at Momence

2,294

98

3,162

2,579

2,493

1,050

4,467

5520500

 Iroquois River near Chebanse

2,091

92

1,806

2,557

2,094

372

6,178

5526000

 Fox River at Dayton

2,642

96

2,189

2,104

1,821

557

3,918

5552500

 Vermilion River at Pontiac

579

72

438

525

390

40

1,315

5554500

 Spoon River at Seville

1,636

99

650

1,460

1,336

206

2,936

5570000

 LaMoine River at Ripley

1,293

92

185

1,034

746

121

2,196

5585000

 Bear Creek near Marcelline

349

71

16

265

168

14

598

5495500

 Mackinaw River near Congerville

767

67

478

668

541

62

1,616

5567500

 Salt Creek near Greenview

1,804

74

928

1,718

1,362

259

3,813

5582000

 Sangamon River at Monticello

550

103

325

591

443

52

1,345

5572000

 So. Fork Sangamon near Rochester

867

66

186

881

603

32

2,068

5576000

 Illinois River at Valley City

26,743

77

29,300

25,019

23,032

8,698

48,240

5586100

 Macoupin Creek near Kane

868

87

101

761

516

39

1,752

5587000

 Vermilion River near Danville

1,290

94

930

1,477

1,072

213

3,208

3339000

 Kaskaskia River at Vandalia

1,940

46

1,270

2,750

2,366

414

5,650

5592500

 Shoal Creek near Breese

735

72

172

906

588

76

2,158

5594000

 Embarras River at Ste. Marie

1,516

102

584

1,951

1,614

218

4,117

3345500

 Skillet Fork at Wayne City

464

96

45

649

491

51

1,487

3380500

 Little Wabash below Clay City

1,131

101

155

1,526

1,180

158

3,323

3379500

 Big Muddy at Plumfield

794

45

291

1,006

1,002

195

1,767

5597000

 Cache River at Forman

244

92

76

488

431

78

943

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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