Flow report
Illinois River Levels & Streamflow
As of Aug 10, 2026, Illinois rivers are running at 92% of normal across 153 USGS gauges — the highest is 171,000 cfs on the Mississippi River At Chester. Live discharge, gauge height, and percent-of-normal for every USGS streamgauge in Illinois.
USGS gauges
153
State percent normal
92%
Paddle runs
0
Updated
Aug 10
Open the Illinois flow layer on the map
Every USGS streamgauge filtered to Illinois.
Open the map →
August
10
2026
Flow briefing
Streamflow levels across Illinois are currently 92% of normal, with the Mississippi River At Chester reporting the highest discharge in the state at 171,000 cfs and a gauge stage of 11.41 ft.
Meanwhile, the Illinois River At Henry is seeing a spike today — up 23% since yesterday and currently running near peak.
Tap any gauge below for the full hydrograph, paired weather forecast, and historical context. Use the rivers panel to jump into Illinois's named rivers.
River levels near Illinois towns
Active weather warnings for Illinois
# Illinois Storm Center Report - August 10, 2026
Illinois faces multiple hazardous weather threats today and through Wednesday. A Flood Advisory remains in effect until 10:00 AM CDT across northeastern Livingston, Ford, and Iroquois counties, with up to 3 inches of rainfall reported affecting communities including Streator, Watseka, Dwight, and Gilman. Simultaneously, dangerous heat conditions dominate the state: Heat Advisories with heat indices between 100-105°F cover central and east-central regions until this evening, while an Extreme Heat Warning with potentially life-threatening heat indices up to 111°F impacts south-central and southwestern Illinois through Wednesday evening. Perry County faces the most severe heat threat with indices potentially reaching 113°F. Residents should monitor flood impacts on roads and streams while taking precautions against heat-related illness during this extended dangerous weather event.
Illinois faces multiple hazardous weather threats today and through Wednesday. A Flood Advisory remains in effect until 10:00 AM CDT across northeastern Livingston, Ford, and Iroquois counties, with up to 3 inches of rainfall reported affecting communities including Streator, Watseka, Dwight, and Gilman. Simultaneously, dangerous heat conditions dominate the state: Heat Advisories with heat indices between 100-105°F cover central and east-central regions until this evening, while an Extreme Heat Warning with potentially life-threatening heat indices up to 111°F impacts south-central and southwestern Illinois through Wednesday evening. Perry County faces the most severe heat threat with indices potentially reaching 113°F. Residents should monitor flood impacts on roads and streams while taking precautions against heat-related illness during this extended dangerous weather event.
Illinois at a glance
State-wide streamflow overview
The Illinois flow picture in four data points -- where the state sits versus historical norms, what's flowing hardest, and what's spiking fastest.
Percent of normal
92%
100% is the historical norm. Below 70% indicates drought; above 130% can flag elevated flood risk.
Highest discharge
Mississippi River At Chester
171,000 cfs
Gauge stage 11.41 ft
Biggest 24h spike
Illinois River At Henry
+23%
Now 10,800 cfs
Network coverage
Gauges + rivers tracked
153 + 0
USGS gauges feeding 0 named rivers in Illinois.
Full streamgauge inventory
Illinois USGS streamgauges
Every USGS gauge Snoflo tracks in Illinois. Sortable, quickly filterable. Numeric columns heat-mapped from light to deep. Tap any gauge for its full hydrograph and forecast.
| Streamgage | Streamflow | Gage height | Water temp | Air temp | Elevation | Watershed |
|---|---|---|---|---|---|---|
|
Mississippi River At Thebes, Il
10 hours ago · USGS 07022000 |
170,000 cfs | 15.58 ft | · | 76°F | 321 ft | Upper Mississippi-Cape Girardeau |
|
Mississippi River At Chester, Il
10 hours ago · USGS 07020500 |
166,000 cfs | 11.01 ft | · | 76°F | 358 ft | Upper Mississippi-Cape Girardeau |
|
Wabash River At Mt. Carmel, Il
11 hours ago · USGS 03377500 |
14,500 cfs | 5.46 ft | · | 74°F | 391 ft | Lower Wabash |
|
Illinois River At Valley City, Il
11 hours ago · USGS 05586100 |
13,500 cfs | 4.14 ft | · | 75°F | 433 ft | Lower Illinois |
|
Illinois River At Kingston Mines, Il
12 hours ago · USGS 05568500 |
12,900 cfs | 5.42 ft | · | 73°F | 441 ft | Lower Illinois-Lake Chautauqua |
|
Illinois River At Marseilles, Il
11 hours ago · USGS 05543500 |
12,100 cfs | 13.24 ft | · | 74°F | 459 ft | Upper Illinois |
|
Illinois River At Henry, Il
11 hours ago · USGS 05558300 |
11,000 cfs | 15.33 ft | 82°F | 72°F | 440 ft | Lower Illinois-Senachwine Lake |
|
Rock River Near Joslin, Il
12 hours ago · USGS 05446500 |
5,010 cfs | 5.88 ft | 34°F | 71°F | 588 ft | Lower Rock |
|
Rock River At Como, Il
11 hours ago · USGS 05443500 |
4,430 cfs | 3.96 ft | · | 70°F | 618 ft | Lower Rock |
|
Rock River At Byron, Il
11 hours ago · USGS 05440700 |
4,400 cfs | 6.14 ft | 78°F | 69°F | 677 ft | Lower Rock |
|
Rock River At Rockton, Il
11 hours ago · USGS 05437500 |
4,300 cfs | 4.55 ft | · | 69°F | 712 ft | Lower Rock |
|
Kankakee River Near Wilmington, Il
11 hours ago · USGS 05527500 |
2,100 cfs | 1.53 ft | 78°F | 76°F | 511 ft | Kankakee |
|
Kaskaskia River Near Venedy Station, Il
11 hours ago · USGS 05594100 |
2,090 cfs | 7.19 ft | · | 75°F | 395 ft | Lower Kaskaskia |
|
Des Plaines River At Riverside, Il
12 hours ago · USGS 05532500 |
1,930 cfs | 4.59 ft | · | 73°F | 598 ft | Des Plaines |
|
Fox River At South Elgin, Il
12 hours ago · USGS 05551000 |
1,920 cfs | 13.04 ft | · | 71°F | 696 ft | Lower Fox |
|
Fox River At Dayton, Il
12 hours ago · USGS 05552500 |
1,910 cfs | 6.72 ft | · | 76°F | 472 ft | Lower Fox |
|
Fox River At Montgomery, Il
11 hours ago · USGS 05551540 |
1,740 cfs | 11.88 ft | · | 72°F | 613 ft | Lower Fox |
|
Kaskaskia River At Vandalia, Il
11 hours ago · USGS 05592500 |
1,740 cfs | 8.26 ft | · | 74°F | 537 ft | Middle Kaskaskia |
|
Kaskaskia River Near Cowden, Il
11 hours ago · USGS 05592100 |
1,670 cfs | 8.06 ft | · | 73°F | 553 ft | Upper Kaskaskia |
|
Kaskaskia River At Shelbyville, Il
11 hours ago · USGS 05592000 |
1,620 cfs | 11.09 ft | · | 73°F | 568 ft | Upper Kaskaskia |
|
Pecatonica River Nr Shirland, Il
11 hours ago · USGS 05437050 |
1,520 cfs | 4.94 ft | · | 69°F | 718 ft | Pecatonica |
|
Kaskaskia River At Carlyle, Il
11 hours ago · USGS 05593000 |
1,520 cfs | 10.35 ft | · | 75°F | 413 ft | Middle Kaskaskia |
|
Du Page River At Shorewood, Il
12 hours ago · USGS 05540500 |
1,440 cfs | 12.20 ft | · | 73°F | 566 ft | Des Plaines |
|
Kankakee River At Momence, Il
12 hours ago · USGS 05520500 |
1,360 cfs | 1.85 ft | · | 75°F | 610 ft | Kankakee |
|
Fox River At Algonquin (Tailwater), Il
11 hours ago · USGS 05550001 |
1,320 cfs | 6.47 ft | 32°F | 70°F | 727 ft | Upper Fox |
|
Kaskaskia River At New Athens, Il
11 hours ago · USGS 05595000 |
1,320 cfs | 68.87 ft | 73°F | 75°F | 403 ft | Lower Kaskaskia |
|
Des Plaines River Near Des Plaines, Il
11 hours ago · USGS 05529000 |
1,120 cfs | 12.23 ft | · | 72°F | 625 ft | Des Plaines |
|
Little Calumet River At South Holland, Il
12 hours ago · USGS 05536290 |
851 cfs | 10.58 ft | · | 72°F | 596 ft | Chicago |
|
Pecatonica River At Freeport, Il
11 hours ago · USGS 05435500 |
804 cfs | 4.57 ft | · | 67°F | 754 ft | Pecatonica |
|
Sangamon River Near Oakford, Il
12 hours ago · USGS 05583000 |
753 cfs | 3.83 ft | 81°F | 74°F | 457 ft | Lower Sangamon |
|
East Branch Du Page River At Bolingbrook, Il
11 hours ago · USGS 05540250 |
743 cfs | 18.57 ft | · | 72°F | 640 ft | Des Plaines |
|
Des Plaines River Near Gurnee, Il
11 hours ago · USGS 05528000 |
693 cfs | 5.56 ft | · | 69°F | 664 ft | Des Plaines |
|
West Branch Du Page River Near Naperville, Il
11 hours ago · USGS 05540130 |
641 cfs | 6.04 ft | · | 72°F | 637 ft | Des Plaines |
|
Salt Creek At Western Springs, Il
11 hours ago · USGS 05531500 |
586 cfs | 4.53 ft | · | 73°F | 634 ft | Des Plaines |
|
Thorn Creek At Thornton, Il
11 hours ago · USGS 05536275 |
583 cfs | 5.89 ft | · | 72°F | 603 ft | Chicago |
|
West Br Du Page River Near Warrenville, Il
11 hours ago · USGS 05540095 |
519 cfs | 9.36 ft | · | 74°F | 688 ft | Des Plaines |
|
Salt Creek At Elmhurst, Il
11 hours ago · USGS 05531300 |
477 cfs | 7.51 ft | · | 72°F | 670 ft | Des Plaines |
|
E Br Du Page River Near Downers Grove, Il
11 hours ago · USGS 05540160 |
429 cfs | 14.07 ft | · | 72°F | 675 ft | Des Plaines |
|
Iroquois River Near Chebanse, Il
12 hours ago · USGS 05526000 |
412 cfs | 3.36 ft | · | 76°F | 600 ft | Iroquois |
|
Buffalo Creek Near Wheeling, Il
11 hours ago · USGS 05528500 |
379 cfs | 5.11 ft | · | 74°F | 667 ft | Des Plaines |
|
North Branch Chicago River At Niles, Il
11 hours ago · USGS 05536000 |
354 cfs | 3.37 ft | · | 72°F | 608 ft | Chicago |
|
Wf Of Nb Chicago River At Northbrook Il, Il
11 hours ago · USGS 05535500 |
353 cfs | 5.44 ft | · | 74°F | 653 ft | Chicago |
|
Kishwaukee River Near Perryville, Il
11 hours ago · USGS 05440000 |
348 cfs | 5.67 ft | · | 73°F | 701 ft | Kishwaukee |
|
Embarras River At Lawrenceville, Il
12 hours ago · USGS 03346500 |
337 cfs | 17.29 ft | 61°F | 74°F | 424 ft | Embarras |
|
Salt Creek At Rolling Meadows, Il
12 hours ago · USGS 05530990 |
319 cfs | 5.28 ft | · | 74°F | 694 ft | Des Plaines |
|
North Branch Chicago River At Deerfield, Il
11 hours ago · USGS 05534500 |
303 cfs | 9.25 ft | · | 71°F | 642 ft | Chicago |
|
Mackinaw River Near Green Valley, Il
12 hours ago · USGS 05568000 |
292 cfs | 13.82 ft | 75°F | 74°F | 501 ft | Mackinaw |
|
Skokie River Near Highland Park, Il
11 hours ago · USGS 05535070 |
288 cfs | 6.67 ft | · | 71°F | 632 ft | Chicago |
|
Little Wabash River At Carmi, Il
12 hours ago · USGS 03381500 |
285 cfs | 3.38 ft | · | 73°F | 419 ft | Little Wabash |
|
Salt Creek Near Greenview, Il
12 hours ago · USGS 05582000 |
280 cfs | 1.51 ft | 83°F | 74°F | 481 ft | Salt |
|
Weller Creek At Des Plaines, Il
11 hours ago · USGS 05530000 |
257 cfs | 3.16 ft | · | 72°F | 648 ft | Des Plaines |
|
Green River Near Geneseo, Il
11 hours ago · USGS 05447500 |
256 cfs | 2.73 ft | 58°F | 71°F | 586 ft | Green |
|
Spoon River At Seville, Il
12 hours ago · USGS 05570000 |
255 cfs | 5.65 ft | 53°F | 73°F | 498 ft | Spoon |
|
W Branch Du Page River Nr West Chicago, Il
11 hours ago · USGS 05539900 |
244 cfs | 5.76 ft | · | 74°F | 723 ft | Des Plaines |
|
Sangamon River At Petersburg, Il
11 hours ago · USGS 05578000 |
237 cfs | 4.66 ft | 79°F | 75°F | 489 ft | Lower Sangamon |
|
Big Muddy River At Rte 127 At Murphysboro, Il
11 hours ago · USGS 05599490 |
227 cfs | 3.85 ft | 84°F | 74°F | 357 ft | Big Muddy |
|
Des Plaines River At Russell, Il
11 hours ago · USGS 05527800 |
215 cfs | 6.16 ft | · | 69°F | 667 ft | Des Plaines |
|
Flag Creek Near Willow Springs, Il
11 hours ago · USGS 05533000 |
209 cfs | 5.02 ft | · | 73°F | 610 ft | Des Plaines |
|
Skokie River At Lake Forest, Il
11 hours ago · USGS 05535000 |
190 cfs | 4.05 ft | · | 73°F | 664 ft | Chicago |
|
Embarras River At Ste. Marie, Il
11 hours ago · USGS 03345500 |
182 cfs | 1.57 ft | · | 73°F | 499 ft | Embarras |
|
Spoon River At London Mills, Il
12 hours ago · USGS 05569500 |
181 cfs | 2.38 ft | 77°F | 72°F | 557 ft | Spoon |
|
Kishwaukee River At Belvidere, Il
11 hours ago · USGS 05438500 |
178 cfs | 1.39 ft | · | 72°F | 740 ft | Kishwaukee |
|
Sangamon River At Riverton, Il
12 hours ago · USGS 05576500 |
173 cfs | 2.76 ft | · | 75°F | 519 ft | Lower Sangamon |
|
Vermilion River Near Danville, Il
11 hours ago · USGS 03339000 |
170 cfs | 2.49 ft | 64°F | 73°F | 517 ft | Vermilion |
|
Sawmill Creek Near Lemont, Il
11 hours ago · USGS 05533400 |
168 cfs | 10.17 ft | · | 75°F | 647 ft | Des Plaines |
|
Mackinaw River Near Congerville, Il
12 hours ago · USGS 05567500 |
145 cfs | 1.25 ft | 47°F | 73°F | 611 ft | Mackinaw |
|
Hickory Creek At Joliet, Il
11 hours ago · USGS 05539000 |
136 cfs | 11.41 ft | · | 73°F | 535 ft | Des Plaines |
|
Little Wabash River Below Clay City, Il
11 hours ago · USGS 03379500 |
125 cfs | 5.53 ft | · | 74°F | 477 ft | Little Wabash |
|
Big Muddy River At Plumfield, Il
11 hours ago · USGS 05597000 |
118 cfs | 3.23 ft | · | 75°F | 379 ft | Big Muddy |
|
Edwards River Near New Boston, Il
11 hours ago · USGS 05466500 |
114 cfs | 12.90 ft | · | 72°F | 561 ft | Flint-Henderson |
|
Nippersink Creek Near Spring Grove, Il
11 hours ago · USGS 05548280 |
114 cfs | 4.33 ft | · | 68°F | 754 ft | Upper Fox |
|
La Moine River At Ripley, Il
12 hours ago · USGS 05585000 |
111 cfs | 5.33 ft | · | 74°F | 467 ft | La Moine |
|
Henderson Creek Near Oquawka, Il
11 hours ago · USGS 05469000 |
107 cfs | 13.77 ft | · | 72°F | 611 ft | Flint-Henderson |
|
Thorn Creek At Glenwood, Il
11 hours ago · USGS 05536215 |
104 cfs | 3.11 ft | · | 72°F | 628 ft | Chicago |
|
Vermilion River Near Leonore, Il
12 hours ago · USGS 05555300 |
103 cfs | 3.54 ft | 76°F | 77°F | 535 ft | Vermilion |
|
Poplar Creek At Elgin, Il
11 hours ago · USGS 05550500 |
102 cfs | 2.11 ft | · | 71°F | 730 ft | Upper Fox |
|
Silver Creek Near Freeburg, Il
11 hours ago · USGS 05594800 |
96 cfs | 1.18 ft | · | 75°F | 418 ft | Lower Kaskaskia |
|
Midlothian Creek At Oak Forest, Il
11 hours ago · USGS 05536340 |
96 cfs | 2.49 ft | · | 72°F | 629 ft | Chicago |
|
Big Bureau Creek At Princeton, Il
12 hours ago · USGS 05556500 |
94 cfs | 2.71 ft | · | 71°F | 603 ft | Lower Illinois-Senachwine Lake |
|
Spring Brook At 87th Street Near Naperville, Il
12 hours ago · USGS 05540275 |
94 cfs | 5.41 ft | · | 72°F | 652 ft | Des Plaines |
|
Mc Donald Creek Near Mount Prospect, Il
12 hours ago · USGS 05529500 |
87 cfs | 3.03 ft | · | 72°F | 641 ft | Des Plaines |
|
Iroquois River At Iroquois, Il
11 hours ago · USGS 05525000 |
80 cfs | 5.08 ft | · | 75°F | 638 ft | Iroquois |
|
Deer Creek Near Chicago Heights, Il
11 hours ago · USGS 05536235 |
80 cfs | 5.36 ft | · | 72°F | 628 ft | Chicago |
|
St. Joseph Creek At U.S. Route 34 At Lisle, Il
11 hours ago · USGS 05540195 |
70 cfs | 5.42 ft | · | 72°F | 673 ft | Des Plaines |
|
South Branch Kishwaukee River Nr Fairdale Il, Il
12 hours ago · USGS 05439500 |
68 cfs | 2.09 ft | · | 70°F | 736 ft | Kishwaukee |
|
Addison Creek At Bellwood, Il
11 hours ago · USGS 05532000 |
67 cfs | 2.25 ft | · | 72°F | 627 ft | Des Plaines |
|
Apple River Near Hanover, Il
11 hours ago · USGS 05419000 |
66 cfs | 4.08 ft | · | 69°F | 596 ft | Apple-Plum |
|
Butterfield Creek At Flossmoor, Il
11 hours ago · USGS 05536255 |
63 cfs | 5.03 ft | · | 72°F | 635 ft | Chicago |
|
Tinley Creek Near Palos Park, Il
11 hours ago · USGS 05536500 |
60 cfs | 3.28 ft | · | 73°F | 608 ft | Chicago |
|
Tyler Creek At Elgin, Il
12 hours ago · USGS 05550300 |
58 cfs | 6.21 ft | · | 71°F | 751 ft | Upper Fox |
|
Shoal Creek Near Breese, Il
11 hours ago · USGS 05594000 |
57 cfs | 1.30 ft | · | 75°F | 456 ft | Shoal |
|
Middle Fork Vermilion River Above Oakwood, Il
12 hours ago · USGS 03336645 |
55 cfs | 1.02 ft | · | 73°F | 560 ft | Vermilion |
|
Elkhorn Creek Near Penrose, Il
12 hours ago · USGS 05444000 |
55 cfs | 2.88 ft | · | 69°F | 669 ft | Lower Rock |
|
Blackberry Creek Near Yorkville, Il
11 hours ago · USGS 05551700 |
52 cfs | 3.69 ft | · | 71°F | 617 ft | Lower Fox |
|
Blackberry Creek Near Montgomery, Il
11 hours ago · USGS 05551675 |
52 cfs | 3.92 ft | · | 71°F | 661 ft | Lower Fox |
|
Skillet Fork At Wayne City, Il
11 hours ago · USGS 03380500 |
51 cfs | 5.41 ft | · | 74°F | 387 ft | Skillet |
|
Ferson Creek Near St. Charles, Il
11 hours ago · USGS 05551200 |
51 cfs | 2.01 ft | · | 71°F | 709 ft | Lower Fox |
|
La Moine River At Colmar, Il
12 hours ago · USGS 05584500 |
49 cfs | 3.57 ft | · | 74°F | 511 ft | La Moine |
|
Vermilion River At Pontiac, Il
12 hours ago · USGS 05554500 |
45 cfs | 2.92 ft | 77°F | 77°F | 661 ft | Vermilion |
|
Sangamon River At Monticello, Il
11 hours ago · USGS 05572000 |
43 cfs | 4.73 ft | 77°F | 73°F | 646 ft | Upper Sangamon |
|
Shoal Creek Nr Pierron, Il
11 hours ago · USGS 05593945 |
42 cfs | 42.72 ft | · | 75°F | 465 ft | Shoal |
|
Long Run Near Lemont, Il
11 hours ago · USGS 05537500 |
39 cfs | 1.99 ft | · | 72°F | 641 ft | Des Plaines |
|
Cache River At Forman, Il
11 hours ago · USGS 03612000 |
38 cfs | 9.75 ft | · | 75°F | 367 ft | Lower Ohio |
|
Cahokia Creek At Edwardsville, Il
11 hours ago · USGS 05587900 |
33 cfs | 3.51 ft | · | 76°F | 456 ft | Cahokia-Joachim |
|
Richland Creek Near Hecker, Il
11 hours ago · USGS 05595200 |
31 cfs | 27.75 ft | · | 74°F | 403 ft | Lower Kaskaskia |
|
Sinsinawa River Near Menominee, Il
11 hours ago · USGS 05414820 |
30 cfs | 4.83 ft | · | 68°F | 645 ft | Apple-Plum |
|
Sugar Creek Near Bloomington, Il
11 hours ago · USGS 05580950 |
30 cfs | · | · | 73°F | 749 ft | Salt |
|
Salt Fork Near St. Joseph, Il
12 hours ago · USGS 03336900 |
28 cfs | 3.03 ft | · | 73°F | 661 ft | Vermilion |
|
Sangamon River At Fisher, Il
11 hours ago · USGS 05570910 |
28 cfs | 4.79 ft | 82°F | 73°F | 693 ft | Upper Sangamon |
|
Kickapoo Creek At Waynesville, Il
11 hours ago · USGS 05580000 |
28 cfs | 2.48 ft | · | 73°F | 635 ft | Salt |
|
Mill Creek Near Batavia, Il
11 hours ago · USGS 05551330 |
27 cfs | 2.66 ft | · | 71°F | 690 ft | Lower Fox |
|
Salt Creek Near Rowell, Il
11 hours ago · USGS 05578500 |
26 cfs | 9.02 ft | 77°F | 73°F | 634 ft | Salt |
|
South Fork Saline River Nr Carrier Mills, Il
11 hours ago · USGS 03382100 |
26 cfs | 2.59 ft | · | 73°F | 415 ft | Saline |
|
Pope Creek Near Keithsburg, Il
11 hours ago · USGS 05467000 |
25 cfs | 19.23 ft | · | 72°F | 550 ft | Flint-Henderson |
|
Macoupin Creek Near Kane, Il
21 hours ago · USGS 05587000 |
24 cfs | 4.11 ft | · | 74°F | 445 ft | Macoupin |
|
Sugar Creek At Milford, Il
11 hours ago · USGS 05525500 |
23 cfs | 2.87 ft | · | 76°F | 644 ft | Iroquois |
|
Kress Creek At West Chicago, Il
11 hours ago · USGS 05540060 |
23 cfs | 4.43 ft | · | 74°F | 706 ft | Des Plaines |
|
Nippersink Creek Above Wonder Lake, Il
12 hours ago · USGS 05548105 |
21 cfs | 4.77 ft | · | 68°F | 806 ft | Upper Fox |
|
Mill Creek At Old Mill Creek, Il
11 hours ago · USGS 05527950 |
20 cfs | 6.28 ft | · | 69°F | 677 ft | Des Plaines |
|
South Fork Sangamon River Nr Rochester, Il
12 hours ago · USGS 05576000 |
18 cfs | 5.53 ft | 75°F | 75°F | 518 ft | South Fork Sangamon |
|
Silver Creek Near Troy, Il
11 hours ago · USGS 05594450 |
17 cfs | 4.52 ft | · | 76°F | 491 ft | Lower Kaskaskia |
|
Indian Creek Near Wyoming, Il
11 hours ago · USGS 05568800 |
17 cfs | 9.47 ft | · | 72°F | 623 ft | Spoon |
|
Sangamon River At Rt 48 At Decatur, Il
12 hours ago · USGS 05573540 |
16 cfs | 2.06 ft | 75°F | 74°F | 618 ft | Upper Sangamon |
|
Mazon River Near Coal City, Il
12 hours ago · USGS 05542000 |
15 cfs | 1.13 ft | · | 76°F | 529 ft | Upper Illinois |
|
Kaskaskia River At Cooks Mills, Il
11 hours ago · USGS 05591200 |
15 cfs | 1.48 ft | · | 74°F | 641 ft | Upper Kaskaskia |
|
Embarras River Near Camargo, Il
11 hours ago · USGS 03343400 |
14 cfs | 2.64 ft | · | 73°F | 644 ft | Embarras |
|
Lake Fork Near Cornland, Il
11 hours ago · USGS 05579500 |
13 cfs | 3.51 ft | · | 74°F | 569 ft | Salt |
|
Little Wabash River Near Effingham, Il
11 hours ago · USGS 03378635 |
12 cfs | 10.55 ft | · | 74°F | 542 ft | Little Wabash |
|
Boone Creek Near Mc Henry, Il
12 hours ago · USGS 05549000 |
11 cfs | 1.23 ft | · | 69°F | 779 ft | Upper Fox |
|
Mill Creek At Milan, Il
11 hours ago · USGS 05448000 |
11 cfs | 1.62 ft | · | 72°F | 574 ft | Lower Rock |
|
East Fork Kaskaskia River Near Sandoval, Il
11 hours ago · USGS 05592900 |
10 cfs | 3.11 ft | · | 75°F | 491 ft | Middle Kaskaskia |
|
Hurricane Creek Near Mulberry Grove, Il
11 hours ago · USGS 05592800 |
10 cfs | 3.54 ft | · | 75°F | 551 ft | Middle Kaskaskia |
|
Bear Creek Near Marcelline, Il
11 hours ago · USGS 05495500 |
9 cfs | 2.47 ft | · | 75°F | 523 ft | Bear-Wyaconda |
|
Rayse Creek Near Waltonville, Il
11 hours ago · USGS 05595730 |
8 cfs | 1.51 ft | · | 75°F | 424 ft | Big Muddy |
|
North Fork Embarras River Near Oblong, Il
11 hours ago · USGS 03346000 |
6 cfs | 2.51 ft | · | 73°F | 498 ft | Embarras |
|
Little Crooked Creek Near New Minden, Il
11 hours ago · USGS 05593575 |
4 cfs | 4.94 ft | · | 75°F | 485 ft | Middle Kaskaskia |
|
Farm Creek At Farmdale, Il
11 hours ago · USGS 05560500 |
3 cfs | · | · | 74°F | 541 ft | Lower Illinois-Senachwine Lake |
|
Indian Creek At Wanda, Il
11 hours ago · USGS 05588000 |
3 cfs | · | · | 76°F | 447 ft | Cahokia-Joachim |
|
Casey Fork At Mount Vernon, Il
11 hours ago · USGS 05595820 |
3 cfs | 1.53 ft | · | 74°F | 441 ft | Big Muddy |
|
Lusk Creek Near Eddyville, Il
11 hours ago · USGS 03384450 |
3 cfs | 2.33 ft | · | 72°F | 388 ft | Lower Ohio-Bay |
|
Boneyard Creek At Lincoln Ave At Urbana, Il
11 hours ago · USGS 03337100 |
3 cfs | 7.48 ft | · | 73°F | 714 ft | Vermilion |
|
South Branch Kishwaukee River At Dekalb, Il
11 hours ago · USGS 05439000 |
3 cfs | 2.82 ft | · | 73°F | 846 ft | Kishwaukee |
|
Spring Creek At Springfield, Il
11 hours ago · USGS 05577500 |
2 cfs | 1.69 ft | · | 75°F | 529 ft | Lower Sangamon |
|
East Fork Shoal Creek Near Coffeen, Il
11 hours ago · USGS 05593900 |
2 cfs | 1.87 ft | · | 73°F | 590 ft | Shoal |
|
Bonpas Creek At Browns, Il
12 hours ago · USGS 03378000 |
2 cfs | 1.46 ft | · | 73°F | 451 ft | Lower Wabash |
|
West Okaw River Near Lovington, Il
11 hours ago · USGS 05591700 |
2 cfs | 3.00 ft | · | 74°F | 639 ft | Upper Kaskaskia |
|
Boneyard Creek At Urbana, Il
11 hours ago · USGS 03337000 |
2 cfs | 10.23 ft | · | 73°F | 717 ft | Vermilion |
|
Crab Orchard Creek Near Marion, Il
11 hours ago · USGS 05597500 |
2 cfs | · | · | 74°F | 430 ft | Big Muddy |
|
Whitley Creek Near Allenville, Il
11 hours ago · USGS 05591550 |
1 cfs | 2.33 ft | · | 73°F | 625 ft | Upper Kaskaskia |
|
Robinson Creek Near Shelbyville, Il
11 hours ago · USGS 05592050 |
1 cfs | 1.60 ft | · | 73°F | 616 ft | Upper Kaskaskia |
|
Lake Fork At Atwood, Il
11 hours ago · USGS 05590800 |
1 cfs | 1.45 ft | · | 74°F | 661 ft | Upper Kaskaskia |
|
Hickory Creek Nr Brownstown, Il
11 hours ago · USGS 05592575 |
0 cfs | 4.05 ft | · | 75°F | 507 ft | Middle Kaskaskia |
|
Fondulac Creek Near East Peoria, Il
12 hours ago · USGS 05561500 |
0 cfs | 1.37 ft | · | 74°F | 521 ft | Lower Illinois-Senachwine Lake |
🔒 Premium
See every Illinois gauge ranked against normal.
- Percentile rank & % of median for all 153 gauges
- 15-day PULSE forecast on every gauge
- Custom flow alerts & full daily history
Flow report FAQ
About Illinois streamflow
What are river levels like in Illinois right now?
As of August 10, 2026, Illinois rivers are running at 92% of normal across 153 USGS streamgauges, and the Mississippi River At Chester is reporting the highest discharge at 171,000 cfs. The full sortable gauge table is below.
Which Illinois river is running highest right now?
As of August 10, 2026, the highest discharge in Illinois is 171,000 cfs on the Mississippi River At Chester. See the sortable gauge table for the full statewide ranking.
Are Illinois rivers high or low right now?
Compare the statewide percent-of-normal on this page: above 100% means Illinois rivers are running higher than the seasonal average for the date, below 100% means lower (a dry spell or drought). Each gauge also shows its own percent of median.
Where does the Illinois streamflow data come from?
The U.S. Geological Survey National Water Information System. USGS streamgauges report continuously (every 15 minutes) and the data is the canonical real-time record for U.S. rivers. Snoflo pulls the latest readings and joins them to a 7-day NOAA weather forecast for each station.
What is cfs?
Cubic feet per second — the standard unit for streamflow. One cfs is about 7.5 gallons per second. Small creeks run at single-digit cfs; the Mississippi at hundreds of thousands.
What does Gauge Height mean?
The water level at the gauge in feet above the reference datum. Used together with discharge to track river state. Flood stage and runnable levels are typically expressed in gauge height (e.g., "flood at 16 ft").
How fresh is the Illinois data?
USGS streamgauges report every 15 minutes; Snoflo re-pulls throughout the day. The AI briefing regenerates daily.
Can I get a flow alert for a Illinois gauge?
Yes. Save any USGS gauge as a favorite in the Snoflo iOS app, set a discharge or stage threshold (e.g. "alert me when discharge crosses 2,000 cfs"), and you'll get a push the moment it crosses.
Is this a substitute for an NWS flood warning?
No. Snoflo is informational. For flood life-safety decisions always follow guidance from your local NWS forecast office and state emergency management. Snoflo data is one input among several.
Browse other states
Streamflow in every state
Alabama
Alaska
Arizona
Arkansas
California
Colorado
Connecticut
Delaware
District Of Columbia
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
Kentucky
Louisiana
Maine
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Montana
Nebraska
Nevada
New Hampshire
New Jersey
New Mexico
New York
North Carolina
North Dakota
Ohio
Oklahoma
Oregon
Pennsylvania
Puerto Rico
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Utah
Vermont
Virgin Islands
Virginia
Washington
West Virginia
Wisconsin
Wyoming
Create a free account, or sign in.
Get the free Illinois report — alerts, favorites, and history & forecasts, plus the free iPhone app.
or
Already have an account?
Sign in