Flow report
Illinois River Levels & Streamflow
As of Aug 31, 2026, Illinois rivers are running at 106% of normal across 153 USGS gauges — the highest is 143,000 cfs on the Mississippi River At Thebes. Live discharge, gauge height, and percent-of-normal for every USGS streamgauge in Illinois.
USGS gauges
153
State percent normal
106%
Paddle runs
0
Updated
Aug 31
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Every USGS streamgauge filtered to Illinois.
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August
31
2026
Flow briefing
Streamflow levels across Illinois are currently 106% of normal, with the Mississippi River At Thebes reporting the highest discharge in the state at 143,000 cfs and a gauge stage of 12.46 ft.
Meanwhile, the Kaskaskia River At New Athens is seeing a spike today — up 28% 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 Natural Disaster Report
Illinois is under multiple Heat Advisories affecting nearly the entire state through September 4th, with heat index values reaching 100-106°F. Central Illinois counties including Sangamon, Christian, Mason, and Knox face conditions from this afternoon through Thursday, while southern regions including Madison, Monroe, and Saint Clair counties remain under advisory through Friday evening. Major population centers including the Springfield and St. Louis metropolitan areas are impacted. Residents across all affected regions should take precautions against heat-related illnesses by staying hydrated, limiting outdoor activities, and checking on vulnerable individuals. The combination of high temperatures and elevated humidity poses significant health risks, particularly for the elderly, children, and those with medical conditions.
Illinois is under multiple Heat Advisories affecting nearly the entire state through September 4th, with heat index values reaching 100-106°F. Central Illinois counties including Sangamon, Christian, Mason, and Knox face conditions from this afternoon through Thursday, while southern regions including Madison, Monroe, and Saint Clair counties remain under advisory through Friday evening. Major population centers including the Springfield and St. Louis metropolitan areas are impacted. Residents across all affected regions should take precautions against heat-related illnesses by staying hydrated, limiting outdoor activities, and checking on vulnerable individuals. The combination of high temperatures and elevated humidity poses significant health risks, particularly for the elderly, children, and those with medical conditions.
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
106%
100% is the historical norm. Below 70% indicates drought; above 130% can flag elevated flood risk.
Highest discharge
Mississippi River At Thebes
143,000 cfs
Gauge stage 12.46 ft
Biggest 24h spike
Kaskaskia River At New Athens
+28%
Now 654 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
12 hours ago · USGS 07022000 |
140,000 cfs | 12.15 ft | · | 72°F | 321 ft | Upper Mississippi-Cape Girardeau |
|
Mississippi River At Chester, Il
12 hours ago · USGS 07020500 |
133,000 cfs | 7.25 ft | · | 69°F | 358 ft | Upper Mississippi-Cape Girardeau |
|
Wabash River At Mt. Carmel, Il
12 hours ago · USGS 03377500 |
49,700 cfs | 14.04 ft | · | 73°F | 391 ft | Lower Wabash |
|
Illinois River At Valley City, Il
13 hours ago · USGS 05586100 |
36,800 cfs | 9.99 ft | · | 72°F | 433 ft | Lower Illinois |
|
Illinois River At Kingston Mines, Il
12 hours ago · USGS 05568500 |
21,400 cfs | 10.96 ft | · | 70°F | 441 ft | Lower Illinois-Lake Chautauqua |
|
Illinois River At Henry, Il
12 hours ago · USGS 05558300 |
10,500 cfs | 15.34 ft | 77°F | 72°F | 440 ft | Lower Illinois-Senachwine Lake |
|
Illinois River At Marseilles, Il
12 hours ago · USGS 05543500 |
8,130 cfs | 12.33 ft | · | 71°F | 459 ft | Upper Illinois |
|
Rock River At Como, Il
12 hours ago · USGS 05443500 |
3,610 cfs | 3.54 ft | · | 70°F | 618 ft | Lower Rock |
|
Embarras River At Lawrenceville, Il
13 hours ago · USGS 03346500 |
3,560 cfs | 22.90 ft | 61°F | 68°F | 424 ft | Embarras |
|
Rock River Near Joslin, Il
13 hours ago · USGS 05446500 |
3,550 cfs | 4.91 ft | 34°F | 73°F | 588 ft | Lower Rock |
|
Rock River At Byron, Il
13 hours ago · USGS 05440700 |
3,520 cfs | 5.70 ft | 74°F | 71°F | 677 ft | Lower Rock |
|
Rock River At Rockton, Il
13 hours ago · USGS 05437500 |
3,220 cfs | 3.80 ft | · | 70°F | 712 ft | Lower Rock |
|
Kankakee River Near Wilmington, Il
12 hours ago · USGS 05527500 |
2,250 cfs | 1.58 ft | 74°F | 70°F | 511 ft | Kankakee |
|
Kankakee River At Momence, Il
12 hours ago · USGS 05520500 |
1,840 cfs | 2.19 ft | · | 69°F | 610 ft | Kankakee |
|
Sangamon River Near Oakford, Il
12 hours ago · USGS 05583000 |
1,760 cfs | 4.98 ft | 81°F | 71°F | 457 ft | Lower Sangamon |
|
Pecatonica River Nr Shirland, Il
13 hours ago · USGS 05437050 |
1,270 cfs | 4.36 ft | · | 70°F | 718 ft | Pecatonica |
|
Fox River At Dayton, Il
12 hours ago · USGS 05552500 |
995 cfs | 5.73 ft | · | 71°F | 472 ft | Lower Fox |
|
Vermilion River Near Danville, Il
13 hours ago · USGS 03339000 |
842 cfs | 4.22 ft | 64°F | 69°F | 517 ft | Vermilion |
|
Spoon River At Seville, Il
12 hours ago · USGS 05570000 |
723 cfs | 7.07 ft | 53°F | 71°F | 498 ft | Spoon |
|
Sangamon River At Petersburg, Il
13 hours ago · USGS 05578000 |
677 cfs | 5.35 ft | 79°F | 69°F | 489 ft | Lower Sangamon |
|
Pecatonica River At Freeport, Il
13 hours ago · USGS 05435500 |
671 cfs | 3.96 ft | · | 70°F | 754 ft | Pecatonica |
|
Kaskaskia River At New Athens, Il
13 hours ago · USGS 05595000 |
664 cfs | 68.74 ft | 73°F | 68°F | 403 ft | Lower Kaskaskia |
|
Mackinaw River Near Green Valley, Il
12 hours ago · USGS 05568000 |
644 cfs | 14.70 ft | 75°F | 70°F | 501 ft | Mackinaw |
|
Fox River At South Elgin, Il
12 hours ago · USGS 05551000 |
589 cfs | 12.30 ft | · | 70°F | 696 ft | Lower Fox |
|
Salt Creek Near Greenview, Il
12 hours ago · USGS 05582000 |
582 cfs | 2.13 ft | 83°F | 70°F | 481 ft | Salt |
|
Fox River At Montgomery, Il
13 hours ago · USGS 05551540 |
566 cfs | 11.18 ft | · | 70°F | 613 ft | Lower Fox |
|
Fox River At Algonquin (Tailwater), Il
13 hours ago · USGS 05550001 |
523 cfs | 4.97 ft | 32°F | 70°F | 727 ft | Upper Fox |
|
Kaskaskia River Near Venedy Station, Il
13 hours ago · USGS 05594100 |
457 cfs | 3.05 ft | · | 69°F | 395 ft | Lower Kaskaskia |
|
Spoon River At London Mills, Il
12 hours ago · USGS 05569500 |
455 cfs | 3.48 ft | 77°F | 71°F | 557 ft | Spoon |
|
Sangamon River At Riverton, Il
13 hours ago · USGS 05576500 |
450 cfs | 3.97 ft | · | 70°F | 519 ft | Lower Sangamon |
|
Green River Near Geneseo, Il
13 hours ago · USGS 05447500 |
435 cfs | 2.93 ft | 58°F | 73°F | 586 ft | Green |
|
Kaskaskia River At Vandalia, Il
13 hours ago · USGS 05592500 |
380 cfs | 4.29 ft | · | 68°F | 537 ft | Middle Kaskaskia |
|
Des Plaines River At Riverside, Il
13 hours ago · USGS 05532500 |
356 cfs | 2.24 ft | · | 73°F | 598 ft | Des Plaines |
|
Iroquois River Near Chebanse, Il
13 hours ago · USGS 05526000 |
350 cfs | 3.21 ft | · | 69°F | 600 ft | Iroquois |
|
Kaskaskia River At Carlyle, Il
13 hours ago · USGS 05593000 |
338 cfs | 6.76 ft | · | 69°F | 413 ft | Middle Kaskaskia |
|
Embarras River At Ste. Marie, Il
12 hours ago · USGS 03345500 |
322 cfs | 2.36 ft | · | 70°F | 499 ft | Embarras |
|
Du Page River At Shorewood, Il
13 hours ago · USGS 05540500 |
310 cfs | 10.53 ft | · | 70°F | 566 ft | Des Plaines |
|
Henderson Creek Near Oquawka, Il
13 hours ago · USGS 05469000 |
306 cfs | 14.89 ft | · | 73°F | 611 ft | Flint-Henderson |
|
Kishwaukee River Near Perryville, Il
13 hours ago · USGS 05440000 |
280 cfs | 5.52 ft | · | 70°F | 701 ft | Kishwaukee |
|
Kaskaskia River Near Cowden, Il
13 hours ago · USGS 05592100 |
271 cfs | 3.64 ft | · | 69°F | 553 ft | Upper Kaskaskia |
|
Edwards River Near New Boston, Il
13 hours ago · USGS 05466500 |
264 cfs | 13.81 ft | · | 73°F | 561 ft | Flint-Henderson |
|
Kaskaskia River At Shelbyville, Il
13 hours ago · USGS 05592000 |
248 cfs | 7.25 ft | · | 68°F | 568 ft | Upper Kaskaskia |
|
Mackinaw River Near Congerville, Il
12 hours ago · USGS 05567500 |
232 cfs | 1.63 ft | 47°F | 71°F | 611 ft | Mackinaw |
|
Sangamon River At Monticello, Il
13 hours ago · USGS 05572000 |
213 cfs | 6.44 ft | 77°F | 69°F | 646 ft | Upper Sangamon |
|
La Moine River At Ripley, Il
13 hours ago · USGS 05585000 |
191 cfs | 5.82 ft | · | 71°F | 467 ft | La Moine |
|
Des Plaines River Near Des Plaines, Il
12 hours ago · USGS 05529000 |
189 cfs | 9.30 ft | · | 73°F | 625 ft | Des Plaines |
|
Little Wabash River At Carmi, Il
13 hours ago · USGS 03381500 |
182 cfs | 3.07 ft | · | 72°F | 419 ft | Little Wabash |
|
Des Plaines River Near Gurnee, Il
13 hours ago · USGS 05528000 |
147 cfs | 3.01 ft | · | 71°F | 664 ft | Des Plaines |
|
Salt Creek At Western Springs, Il
12 hours ago · USGS 05531500 |
145 cfs | 2.21 ft | · | 73°F | 634 ft | Des Plaines |
|
Middle Fork Vermilion River Above Oakwood, Il
12 hours ago · USGS 03336645 |
138 cfs | 1.42 ft | · | 69°F | 560 ft | Vermilion |
|
Kishwaukee River At Belvidere, Il
13 hours ago · USGS 05438500 |
136 cfs | 1.22 ft | · | 70°F | 740 ft | Kishwaukee |
|
Salt Creek Near Rowell, Il
13 hours ago · USGS 05578500 |
133 cfs | 10.86 ft | 77°F | 69°F | 634 ft | Salt |
|
Sangamon River At Rt 48 At Decatur, Il
12 hours ago · USGS 05573540 |
122 cfs | 2.99 ft | 75°F | 70°F | 618 ft | Upper Sangamon |
|
Pope Creek Near Keithsburg, Il
13 hours ago · USGS 05467000 |
106 cfs | 19.99 ft | · | 73°F | 550 ft | Flint-Henderson |
|
Iroquois River At Iroquois, Il
13 hours ago · USGS 05525000 |
106 cfs | 5.20 ft | · | 69°F | 638 ft | Iroquois |
|
Big Muddy River At Rte 127 At Murphysboro, Il
13 hours ago · USGS 05599490 |
95 cfs | 3.47 ft | 82°F | 72°F | 357 ft | Big Muddy |
|
La Moine River At Colmar, Il
12 hours ago · USGS 05584500 |
93 cfs | 4.24 ft | · | 72°F | 511 ft | La Moine |
|
Nippersink Creek Near Spring Grove, Il
13 hours ago · USGS 05548280 |
93 cfs | 4.16 ft | · | 70°F | 754 ft | Upper Fox |
|
West Branch Du Page River Near Naperville, Il
13 hours ago · USGS 05540130 |
91 cfs | 4.26 ft | · | 71°F | 637 ft | Des Plaines |
|
Little Calumet River At South Holland, Il
13 hours ago · USGS 05536290 |
89 cfs | 5.71 ft | · | 72°F | 596 ft | Chicago |
|
East Branch Du Page River At Bolingbrook, Il
12 hours ago · USGS 05540250 |
87 cfs | 14.96 ft | · | 71°F | 640 ft | Des Plaines |
|
Salt Fork Near St. Joseph, Il
13 hours ago · USGS 03336900 |
86 cfs | 3.84 ft | · | 68°F | 661 ft | Vermilion |
|
Kickapoo Creek At Waynesville, Il
13 hours ago · USGS 05580000 |
81 cfs | 3.06 ft | · | 70°F | 635 ft | Salt |
|
Vermilion River Near Leonore, Il
12 hours ago · USGS 05555300 |
74 cfs | 3.68 ft | 76°F | 71°F | 535 ft | Vermilion |
|
Big Muddy River At Plumfield, Il
13 hours ago · USGS 05597000 |
73 cfs | 2.59 ft | · | 73°F | 379 ft | Big Muddy |
|
Apple River Near Hanover, Il
13 hours ago · USGS 05419000 |
63 cfs | 4.07 ft | · | 70°F | 596 ft | Apple-Plum |
|
Vermilion River At Pontiac, Il
12 hours ago · USGS 05554500 |
60 cfs | 3.03 ft | 77°F | 71°F | 661 ft | Vermilion |
|
Sangamon River At Fisher, Il
13 hours ago · USGS 05570910 |
58 cfs | 5.66 ft | 82°F | 69°F | 693 ft | Upper Sangamon |
|
West Br Du Page River Near Warrenville, Il
13 hours ago · USGS 05540095 |
54 cfs | 7.75 ft | · | 71°F | 688 ft | Des Plaines |
|
Hickory Creek At Joliet, Il
13 hours ago · USGS 05539000 |
54 cfs | 10.83 ft | · | 70°F | 535 ft | Des Plaines |
|
Elkhorn Creek Near Penrose, Il
12 hours ago · USGS 05444000 |
52 cfs | 2.86 ft | · | 70°F | 669 ft | Lower Rock |
|
Little Wabash River Below Clay City, Il
13 hours ago · USGS 03379500 |
51 cfs | 4.55 ft | · | 66°F | 477 ft | Little Wabash |
|
Sugar Creek At Milford, Il
13 hours ago · USGS 05525500 |
48 cfs | 3.30 ft | · | 68°F | 644 ft | Iroquois |
|
Thorn Creek At Thornton, Il
12 hours ago · USGS 05536275 |
47 cfs | 2.92 ft | · | 72°F | 603 ft | Chicago |
|
E Br Du Page River Near Downers Grove, Il
13 hours ago · USGS 05540160 |
44 cfs | 12.21 ft | · | 72°F | 675 ft | Des Plaines |
|
Blackberry Creek Near Yorkville, Il
13 hours ago · USGS 05551700 |
41 cfs | 3.49 ft | · | 70°F | 617 ft | Lower Fox |
|
Thorn Creek At Glenwood, Il
13 hours ago · USGS 05536215 |
41 cfs | 2.65 ft | · | 71°F | 628 ft | Chicago |
|
Indian Creek Near Wyoming, Il
13 hours ago · USGS 05568800 |
40 cfs | 9.83 ft | · | 70°F | 623 ft | Spoon |
|
Salt Creek At Elmhurst, Il
13 hours ago · USGS 05531300 |
38 cfs | 5.06 ft | · | 72°F | 670 ft | Des Plaines |
|
South Branch Kishwaukee River Nr Fairdale Il, Il
13 hours ago · USGS 05439500 |
37 cfs | 1.95 ft | · | 70°F | 736 ft | Kishwaukee |
|
Kaskaskia River At Cooks Mills, Il
13 hours ago · USGS 05591200 |
37 cfs | 2.03 ft | · | 69°F | 641 ft | Upper Kaskaskia |
|
Mill Creek At Old Mill Creek, Il
13 hours ago · USGS 05527950 |
37 cfs | 6.57 ft | · | 71°F | 677 ft | Des Plaines |
|
North Branch Chicago River At Niles, Il
13 hours ago · USGS 05536000 |
37 cfs | · | · | 73°F | 608 ft | Chicago |
|
Blackberry Creek Near Montgomery, Il
13 hours ago · USGS 05551675 |
35 cfs | 3.73 ft | · | 70°F | 661 ft | Lower Fox |
|
Sugar Creek Near Bloomington, Il
13 hours ago · USGS 05580950 |
33 cfs | 1.01 ft | · | 69°F | 749 ft | Salt |
|
Shoal Creek Near Breese, Il
13 hours ago · USGS 05594000 |
30 cfs | 1.07 ft | · | 68°F | 456 ft | Shoal |
|
Lake Fork At Atwood, Il
13 hours ago · USGS 05590800 |
29 cfs | 2.52 ft | · | 68°F | 661 ft | Upper Kaskaskia |
|
Embarras River Near Camargo, Il
13 hours ago · USGS 03343400 |
28 cfs | 3.10 ft | · | 69°F | 644 ft | Embarras |
|
Sinsinawa River Near Menominee, Il
13 hours ago · USGS 05414820 |
27 cfs | 4.78 ft | · | 70°F | 645 ft | Apple-Plum |
|
Mazon River Near Coal City, Il
12 hours ago · USGS 05542000 |
25 cfs | 1.29 ft | · | 70°F | 529 ft | Upper Illinois |
|
Nippersink Creek Above Wonder Lake, Il
13 hours ago · USGS 05548105 |
21 cfs | 4.78 ft | · | 70°F | 806 ft | Upper Fox |
|
Silver Creek Near Freeburg, Il
13 hours ago · USGS 05594800 |
21 cfs | · | · | 67°F | 418 ft | Lower Kaskaskia |
|
W Branch Du Page River Nr West Chicago, Il
12 hours ago · USGS 05539900 |
20 cfs | 3.75 ft | · | 71°F | 723 ft | Des Plaines |
|
Shoal Creek Nr Pierron, Il
13 hours ago · USGS 05593945 |
18 cfs | 42.28 ft | · | 68°F | 465 ft | Shoal |
|
Mill Creek At Milan, Il
13 hours ago · USGS 05448000 |
18 cfs | 1.81 ft | · | 74°F | 574 ft | Lower Rock |
|
Big Bureau Creek At Princeton, Il
12 hours ago · USGS 05556500 |
16 cfs | 2.77 ft | · | 72°F | 603 ft | Lower Illinois-Senachwine Lake |
|
Flag Creek Near Willow Springs, Il
13 hours ago · USGS 05533000 |
16 cfs | 3.38 ft | · | 72°F | 610 ft | Des Plaines |
|
Des Plaines River At Russell, Il
13 hours ago · USGS 05527800 |
16 cfs | 3.91 ft | · | 71°F | 667 ft | Des Plaines |
|
Robinson Creek Near Shelbyville, Il
13 hours ago · USGS 05592050 |
15 cfs | 2.10 ft | · | 68°F | 616 ft | Upper Kaskaskia |
|
South Fork Sangamon River Nr Rochester, Il
13 hours ago · USGS 05576000 |
15 cfs | 5.44 ft | 75°F | 70°F | 518 ft | South Fork Sangamon |
|
Cahokia Creek At Edwardsville, Il
13 hours ago · USGS 05587900 |
15 cfs | 3.25 ft | · | 69°F | 456 ft | Cahokia-Joachim |
|
Ferson Creek Near St. Charles, Il
13 hours ago · USGS 05551200 |
14 cfs | 1.43 ft | · | 70°F | 709 ft | Lower Fox |
|
Lake Fork Near Cornland, Il
13 hours ago · USGS 05579500 |
13 cfs | 3.50 ft | · | 70°F | 569 ft | Salt |
|
Richland Creek Near Hecker, Il
13 hours ago · USGS 05595200 |
11 cfs | 26.85 ft | · | 67°F | 403 ft | Lower Kaskaskia |
|
Boone Creek Near Mc Henry, Il
12 hours ago · USGS 05549000 |
10 cfs | 1.00 ft | · | 70°F | 779 ft | Upper Fox |
|
Deer Creek Near Chicago Heights, Il
13 hours ago · USGS 05536235 |
10 cfs | 3.36 ft | · | 71°F | 628 ft | Chicago |
|
Macoupin Creek Near Kane, Il
13 hours ago · USGS 05587000 |
10 cfs | 3.85 ft | · | 70°F | 445 ft | Macoupin |
|
Tyler Creek At Elgin, Il
12 hours ago · USGS 05550300 |
9 cfs | 5.59 ft | · | 70°F | 751 ft | Upper Fox |
|
Cache River At Forman, Il
13 hours ago · USGS 03612000 |
9 cfs | 8.91 ft | · | 72°F | 367 ft | Lower Ohio |
|
Farm Creek At Farmdale, Il
13 hours ago · USGS 05560500 |
8 cfs | · | · | 71°F | 541 ft | Lower Illinois-Senachwine Lake |
|
Skillet Fork At Wayne City, Il
13 hours ago · USGS 03380500 |
8 cfs | 5.03 ft | · | 71°F | 387 ft | Skillet |
|
Hurricane Creek Near Mulberry Grove, Il
13 hours ago · USGS 05592800 |
8 cfs | 3.50 ft | · | 68°F | 551 ft | Middle Kaskaskia |
|
Little Wabash River Near Effingham, Il
13 hours ago · USGS 03378635 |
7 cfs | 10.51 ft | · | 68°F | 542 ft | Little Wabash |
|
Skokie River Near Highland Park, Il
12 hours ago · USGS 05535070 |
7 cfs | 2.79 ft | · | 73°F | 632 ft | Chicago |
|
Wf Of Nb Chicago River At Northbrook Il, Il
13 hours ago · USGS 05535500 |
7 cfs | 1.00 ft | · | 73°F | 653 ft | Chicago |
|
South Fork Saline River Nr Carrier Mills, Il
13 hours ago · USGS 03382100 |
7 cfs | 2.24 ft | · | 73°F | 415 ft | Saline |
|
Skokie River At Lake Forest, Il
12 hours ago · USGS 05535000 |
6 cfs | 2.13 ft | · | 72°F | 664 ft | Chicago |
|
Butterfield Creek At Flossmoor, Il
13 hours ago · USGS 05536255 |
6 cfs | 4.03 ft | · | 72°F | 635 ft | Chicago |
|
Bear Creek Near Marcelline, Il
13 hours ago · USGS 05495500 |
6 cfs | 2.40 ft | · | 74°F | 523 ft | Bear-Wyaconda |
|
Addison Creek At Bellwood, Il
13 hours ago · USGS 05532000 |
6 cfs | 1.26 ft | · | 73°F | 627 ft | Des Plaines |
|
Tinley Creek Near Palos Park, Il
12 hours ago · USGS 05536500 |
5 cfs | 2.55 ft | · | 72°F | 608 ft | Chicago |
|
South Branch Kishwaukee River At Dekalb, Il
13 hours ago · USGS 05439000 |
5 cfs | 2.82 ft | · | 70°F | 846 ft | Kishwaukee |
|
Long Run Near Lemont, Il
13 hours ago · USGS 05537500 |
5 cfs | · | · | 71°F | 641 ft | Des Plaines |
|
Boneyard Creek At Lincoln Ave At Urbana, Il
12 hours ago · USGS 03337100 |
5 cfs | 7.53 ft | · | 69°F | 714 ft | Vermilion |
|
North Branch Chicago River At Deerfield, Il
12 hours ago · USGS 05534500 |
4 cfs | 4.52 ft | · | 73°F | 642 ft | Chicago |
|
Poplar Creek At Elgin, Il
13 hours ago · USGS 05550500 |
4 cfs | 1.04 ft | · | 70°F | 730 ft | Upper Fox |
|
Kress Creek At West Chicago, Il
13 hours ago · USGS 05540060 |
4 cfs | 4.04 ft | · | 70°F | 706 ft | Des Plaines |
|
Sawmill Creek Near Lemont, Il
13 hours ago · USGS 05533400 |
3 cfs | 8.40 ft | · | 72°F | 647 ft | Des Plaines |
|
Salt Creek At Rolling Meadows, Il
12 hours ago · USGS 05530990 |
3 cfs | 2.23 ft | · | 72°F | 694 ft | Des Plaines |
|
Spring Brook At 87th Street Near Naperville, Il
12 hours ago · USGS 05540275 |
3 cfs | 2.82 ft | · | 70°F | 652 ft | Des Plaines |
|
Casey Fork At Mount Vernon, Il
13 hours ago · USGS 05595820 |
2 cfs | 1.54 ft | · | 70°F | 441 ft | Big Muddy |
|
Boneyard Creek At Urbana, Il
13 hours ago · USGS 03337000 |
2 cfs | 10.36 ft | · | 69°F | 717 ft | Vermilion |
|
Midlothian Creek At Oak Forest, Il
13 hours ago · USGS 05536340 |
2 cfs | 1.57 ft | · | 72°F | 629 ft | Chicago |
|
Mill Creek Near Batavia, Il
13 hours ago · USGS 05551330 |
2 cfs | 2.09 ft | · | 70°F | 690 ft | Lower Fox |
|
Silver Creek Near Troy, Il
13 hours ago · USGS 05594450 |
2 cfs | 3.74 ft | · | 68°F | 491 ft | Lower Kaskaskia |
|
Weller Creek At Des Plaines, Il
13 hours ago · USGS 05530000 |
2 cfs | · | · | 73°F | 648 ft | Des Plaines |
|
North Fork Embarras River Near Oblong, Il
13 hours ago · USGS 03346000 |
2 cfs | 2.26 ft | · | 70°F | 498 ft | Embarras |
|
Buffalo Creek Near Wheeling, Il
13 hours ago · USGS 05528500 |
2 cfs | 1.43 ft | · | 72°F | 667 ft | Des Plaines |
|
St. Joseph Creek At U.S. Route 34 At Lisle, Il
14 hours ago · USGS 05540195 |
1 cfs | 4.28 ft | · | 72°F | 673 ft | Des Plaines |
|
East Fork Shoal Creek Near Coffeen, Il
13 hours ago · USGS 05593900 |
1 cfs | 1.82 ft | · | 68°F | 590 ft | Shoal |
|
Mc Donald Creek Near Mount Prospect, Il
13 hours ago · USGS 05529500 |
1 cfs | · | · | 72°F | 641 ft | Des Plaines |
|
Indian Creek At Wanda, Il
13 hours ago · USGS 05588000 |
1 cfs | · | · | 69°F | 447 ft | Cahokia-Joachim |
|
Spring Creek At Springfield, Il
13 hours ago · USGS 05577500 |
1 cfs | 1.58 ft | · | 72°F | 529 ft | Lower Sangamon |
|
Little Crooked Creek Near New Minden, Il
13 hours ago · USGS 05593575 |
1 cfs | 4.71 ft | · | 70°F | 485 ft | Middle Kaskaskia |
|
Whitley Creek Near Allenville, Il
13 hours ago · USGS 05591550 |
0 cfs | 2.19 ft | · | 69°F | 625 ft | Upper Kaskaskia |
|
Lusk Creek Near Eddyville, Il
12 hours ago · USGS 03384450 |
0 cfs | 2.10 ft | · | 72°F | 388 ft | Lower Ohio-Bay |
|
Bonpas Creek At Browns, Il
12 hours ago · USGS 03378000 |
0 cfs | 1.26 ft | · | 72°F | 451 ft | Lower Wabash |
|
Hickory Creek Nr Brownstown, Il
13 hours ago · USGS 05592575 |
0 cfs | 4.18 ft | · | 68°F | 507 ft | Middle Kaskaskia |
|
Crab Orchard Creek Near Marion, Il
13 hours ago · USGS 05597500 |
0 cfs | · | · | 73°F | 430 ft | Big Muddy |
|
Rayse Creek Near Waltonville, Il
13 hours ago · USGS 05595730 |
0 cfs | 1.19 ft | · | 72°F | 424 ft | Big Muddy |
|
Fondulac Creek Near East Peoria, Il
12 hours ago · USGS 05561500 |
0 cfs | 1.37 ft | · | 71°F | 521 ft | Lower Illinois-Senachwine Lake |
|
West Okaw River Near Lovington, Il
13 hours ago · USGS 05591700 |
0 cfs | 2.84 ft | · | 68°F | 639 ft | Upper Kaskaskia |
|
East Fork Kaskaskia River Near Sandoval, Il
13 hours ago · USGS 05592900 |
0 cfs | 2.53 ft | · | 69°F | 491 ft | Middle Kaskaskia |
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See every Illinois gauge ranked against normal.
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Flow report FAQ
About Illinois streamflow
What are river levels like in Illinois right now?
As of August 31, 2026, Illinois rivers are running at 106% of normal across 153 USGS streamgauges, and the Mississippi River At Thebes is reporting the highest discharge at 143,000 cfs. The full sortable gauge table is below.
Which Illinois river is running highest right now?
As of August 31, 2026, the highest discharge in Illinois is 143,000 cfs on the Mississippi River At Thebes. 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.
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