Flow report
Illinois River Levels & Streamflow
As of Sep 1, 2026, Illinois rivers are running at 105% of normal across 153 USGS gauges — the highest is 140,000 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
105%
Paddle runs
0
Updated
Sep 1
Open the Illinois flow layer on the map
Every USGS streamgauge filtered to Illinois.
Open the map →
September
1
2026
Flow briefing
Streamflow levels across Illinois are currently 105% of normal, with the Mississippi River At Thebes reporting the highest discharge in the state at 140,000 cfs and a gauge stage of 12.15 ft.
Meanwhile, the Illinois River At Marseilles is seeing a spike today — up 22% 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 Alert
Illinois is under widespread Heat Advisory warnings through September 4, with dangerously high heat index values affecting the entire state. Northern Illinois, including Chicago and surrounding counties (Cook, DuPage, Kane, Lake, McHenry), faces heat index values of 100-110°F today through Wednesday. Central Illinois counties (McLean, Champaign, Vermilion, Marshall, Woodford) expect heat index values up to 105°F, while southern Illinois counties experience indices reaching 108°F through Friday evening. High humidity combined with extreme temperatures poses significant health risks, particularly for vulnerable populations. Residents are urged to stay hydrated, limit outdoor activities, and check on elderly neighbors and pets. Overnight lows in the mid-70s will provide minimal relief. Heat-related illnesses remain a serious concern throughout this multi-day event.
Illinois is under widespread Heat Advisory warnings through September 4, with dangerously high heat index values affecting the entire state. Northern Illinois, including Chicago and surrounding counties (Cook, DuPage, Kane, Lake, McHenry), faces heat index values of 100-110°F today through Wednesday. Central Illinois counties (McLean, Champaign, Vermilion, Marshall, Woodford) expect heat index values up to 105°F, while southern Illinois counties experience indices reaching 108°F through Friday evening. High humidity combined with extreme temperatures poses significant health risks, particularly for vulnerable populations. Residents are urged to stay hydrated, limit outdoor activities, and check on elderly neighbors and pets. Overnight lows in the mid-70s will provide minimal relief. Heat-related illnesses remain a serious concern throughout this multi-day 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
105%
100% is the historical norm. Below 70% indicates drought; above 130% can flag elevated flood risk.
Highest discharge
Mississippi River At Thebes
140,000 cfs
Gauge stage 12.15 ft
Biggest 24h spike
Illinois River At Marseilles
+22%
Now 8,130 cfs
Network coverage
Gauges + rivers tracked
153 + 0
USGS gauges feeding 0 named rivers in Illinois.
Where every gauge actually sits
One dot per Illinois streamgauge, placed by its own percent of normal. The state average is a single line through all of it.
0%
50%
100% · normal
150%
200%+
Much below normalunder 50%
Below normal50–90%
Near normal90–110%
Above normal110–150%
Much above normalover 150%
Percent of normal compares today's discharge with the historical average for this calendar day. Tap any dot to open that gauge.
Illinois streamflow, three water years
Statewide percent of normal, every day since Aug 2023. The dotted line is normal.
105%
of normal today
+3pts
vs this day last year (102%)
309of 366
days below normal, past year
201%
3-year peak · Aug 2026 · above the axis
50%
100% normal
150%
Aug 2023
202420252026
Sep 1, 2026
799 daily readings from 150 reporting gauges. Percent of normal is today's statewide discharge against the historical average for the same calendar day — 100% is normal, not "good". The axis tops out at 160%: 7 readings above that — including the 201% peak in Aug 2026 — are drawn along the top edge, so a few flood days cannot flatten three years of everything else. The line breaks in 2 places where the record skips more than five days — those are gaps in reporting, not readings of zero.
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
13 hours ago · USGS 07022000 |
132,000 cfs | 11.39 ft | · | 72°F | 321 ft | Upper Mississippi-Cape Girardeau |
|
Mississippi River At Chester, Il
13 hours ago · USGS 07020500 |
123,000 cfs | 6.18 ft | · | 73°F | 358 ft | Upper Mississippi-Cape Girardeau |
|
Wabash River At Mt. Carmel, Il
13 hours ago · USGS 03377500 |
42,000 cfs | 12.26 ft | · | 72°F | 391 ft | Lower Wabash |
|
Illinois River At Valley City, Il
14 hours ago · USGS 05586100 |
34,000 cfs | 9.34 ft | · | 76°F | 433 ft | Lower Illinois |
|
Illinois River At Kingston Mines, Il
14 hours ago · USGS 05568500 |
20,100 cfs | 10.24 ft | · | 74°F | 441 ft | Lower Illinois-Lake Chautauqua |
|
Illinois River At Henry, Il
14 hours ago · USGS 05558300 |
9,420 cfs | 14.86 ft | 80°F | 74°F | 440 ft | Lower Illinois-Senachwine Lake |
|
Illinois River At Marseilles, Il
14 hours ago · USGS 05543500 |
5,650 cfs | 11.69 ft | · | 73°F | 459 ft | Upper Illinois |
|
Rock River Near Joslin, Il
14 hours ago · USGS 05446500 |
3,870 cfs | 5.13 ft | 34°F | 74°F | 588 ft | Lower Rock |
|
Rock River At Como, Il
14 hours ago · USGS 05443500 |
3,720 cfs | 3.50 ft | · | 73°F | 618 ft | Lower Rock |
|
Rock River At Byron, Il
15 hours ago · USGS 05440700 |
3,310 cfs | 5.59 ft | 76°F | 72°F | 677 ft | Lower Rock |
|
Rock River At Rockton, Il
14 hours ago · USGS 05437500 |
3,250 cfs | 3.82 ft | · | 71°F | 712 ft | Lower Rock |
|
Kankakee River Near Wilmington, Il
14 hours ago · USGS 05527500 |
2,100 cfs | 1.53 ft | 77°F | 73°F | 511 ft | Kankakee |
|
Embarras River At Lawrenceville, Il
14 hours ago · USGS 03346500 |
2,090 cfs | 20.87 ft | 61°F | 70°F | 424 ft | Embarras |
|
Kankakee River At Momence, Il
14 hours ago · USGS 05520500 |
1,770 cfs | 2.14 ft | · | 73°F | 610 ft | Kankakee |
|
Sangamon River Near Oakford, Il
14 hours ago · USGS 05583000 |
1,570 cfs | 4.78 ft | 81°F | 74°F | 457 ft | Lower Sangamon |
|
Pecatonica River Nr Shirland, Il
14 hours ago · USGS 05437050 |
1,280 cfs | 4.37 ft | · | 72°F | 718 ft | Pecatonica |
|
Fox River At Dayton, Il
14 hours ago · USGS 05552500 |
956 cfs | 5.68 ft | · | 73°F | 472 ft | Lower Fox |
|
Vermilion River Near Danville, Il
14 hours ago · USGS 03339000 |
774 cfs | 4.08 ft | 64°F | 73°F | 517 ft | Vermilion |
|
Fox River At South Elgin, Il
14 hours ago · USGS 05551000 |
732 cfs | 12.41 ft | · | 72°F | 696 ft | Lower Fox |
|
Fox River At Montgomery, Il
15 hours ago · USGS 05551540 |
687 cfs | 11.27 ft | · | 72°F | 613 ft | Lower Fox |
|
Spoon River At Seville, Il
14 hours ago · USGS 05570000 |
684 cfs | 6.97 ft | 53°F | 72°F | 498 ft | Spoon |
|
Pecatonica River At Freeport, Il
14 hours ago · USGS 05435500 |
681 cfs | 4.01 ft | · | 72°F | 754 ft | Pecatonica |
|
Fox River At Algonquin (Tailwater), Il
14 hours ago · USGS 05550001 |
639 cfs | 5.23 ft | 32°F | 72°F | 727 ft | Upper Fox |
|
Kaskaskia River At New Athens, Il
15 hours ago · USGS 05595000 |
634 cfs | 68.79 ft | 73°F | 73°F | 403 ft | Lower Kaskaskia |
|
Mackinaw River Near Green Valley, Il
14 hours ago · USGS 05568000 |
608 cfs | 14.62 ft | 75°F | 74°F | 501 ft | Mackinaw |
|
Sangamon River At Petersburg, Il
15 hours ago · USGS 05578000 |
599 cfs | 5.26 ft | 79°F | 73°F | 489 ft | Lower Sangamon |
|
Des Plaines River At Riverside, Il
14 hours ago · USGS 05532500 |
525 cfs | 2.64 ft | · | 74°F | 598 ft | Des Plaines |
|
Salt Creek Near Greenview, Il
14 hours ago · USGS 05582000 |
505 cfs | 1.98 ft | 83°F | 73°F | 481 ft | Salt |
|
Sangamon River At Riverton, Il
14 hours ago · USGS 05576500 |
431 cfs | 3.89 ft | · | 74°F | 519 ft | Lower Sangamon |
|
Green River Near Geneseo, Il
14 hours ago · USGS 05447500 |
428 cfs | 2.90 ft | 58°F | 74°F | 586 ft | Green |
|
Kaskaskia River Near Venedy Station, Il
15 hours ago · USGS 05594100 |
428 cfs | 2.93 ft | · | 74°F | 395 ft | Lower Kaskaskia |
|
Spoon River At London Mills, Il
14 hours ago · USGS 05569500 |
423 cfs | 3.37 ft | 77°F | 71°F | 557 ft | Spoon |
|
Du Page River At Shorewood, Il
14 hours ago · USGS 05540500 |
375 cfs | 10.64 ft | · | 72°F | 566 ft | Des Plaines |
|
Kaskaskia River At Vandalia, Il
14 hours ago · USGS 05592500 |
365 cfs | 4.22 ft | · | 74°F | 537 ft | Middle Kaskaskia |
|
Iroquois River Near Chebanse, Il
14 hours ago · USGS 05526000 |
308 cfs | 3.10 ft | · | 73°F | 600 ft | Iroquois |
|
Embarras River At Ste. Marie, Il
14 hours ago · USGS 03345500 |
289 cfs | 2.20 ft | · | 74°F | 499 ft | Embarras |
|
Henderson Creek Near Oquawka, Il
14 hours ago · USGS 05469000 |
283 cfs | 14.76 ft | · | 74°F | 611 ft | Flint-Henderson |
|
Kishwaukee River Near Perryville, Il
14 hours ago · USGS 05440000 |
280 cfs | 5.52 ft | · | 72°F | 701 ft | Kishwaukee |
|
Kaskaskia River Near Cowden, Il
14 hours ago · USGS 05592100 |
266 cfs | 3.62 ft | · | 74°F | 553 ft | Upper Kaskaskia |
|
Des Plaines River Near Des Plaines, Il
14 hours ago · USGS 05529000 |
265 cfs | 9.61 ft | · | 74°F | 625 ft | Des Plaines |
|
Edwards River Near New Boston, Il
14 hours ago · USGS 05466500 |
249 cfs | 13.72 ft | · | 74°F | 561 ft | Flint-Henderson |
|
Kaskaskia River At Shelbyville, Il
14 hours ago · USGS 05592000 |
245 cfs | 7.24 ft | · | 71°F | 568 ft | Upper Kaskaskia |
|
Mackinaw River Near Congerville, Il
14 hours ago · USGS 05567500 |
212 cfs | 1.55 ft | 47°F | 74°F | 611 ft | Mackinaw |
|
Kaskaskia River At Carlyle, Il
14 hours ago · USGS 05593000 |
203 cfs | 6.27 ft | · | 74°F | 413 ft | Middle Kaskaskia |
|
Sangamon River At Monticello, Il
14 hours ago · USGS 05572000 |
189 cfs | 6.25 ft | 77°F | 72°F | 646 ft | Upper Sangamon |
|
La Moine River At Ripley, Il
14 hours ago · USGS 05585000 |
167 cfs | 5.69 ft | · | 74°F | 467 ft | La Moine |
|
Little Wabash River At Carmi, Il
14 hours ago · USGS 03381500 |
146 cfs | 2.71 ft | · | 71°F | 419 ft | Little Wabash |
|
Salt Creek At Western Springs, Il
14 hours ago · USGS 05531500 |
145 cfs | 2.21 ft | · | 74°F | 634 ft | Des Plaines |
|
Des Plaines River Near Gurnee, Il
14 hours ago · USGS 05528000 |
140 cfs | 2.95 ft | · | 73°F | 664 ft | Des Plaines |
|
Kishwaukee River At Belvidere, Il
14 hours ago · USGS 05438500 |
138 cfs | 1.23 ft | · | 72°F | 740 ft | Kishwaukee |
|
North Branch Chicago River At Niles, Il
14 hours ago · USGS 05536000 |
128 cfs | 1.77 ft | · | 75°F | 608 ft | Chicago |
|
Middle Fork Vermilion River Above Oakwood, Il
14 hours ago · USGS 03336645 |
122 cfs | 1.36 ft | · | 71°F | 560 ft | Vermilion |
|
West Branch Du Page River Near Naperville, Il
15 hours ago · USGS 05540130 |
115 cfs | 4.37 ft | · | 73°F | 637 ft | Des Plaines |
|
Salt Creek Near Rowell, Il
14 hours ago · USGS 05578500 |
110 cfs | 10.61 ft | 77°F | 73°F | 634 ft | Salt |
|
Nippersink Creek Near Spring Grove, Il
14 hours ago · USGS 05548280 |
104 cfs | 4.25 ft | · | 72°F | 754 ft | Upper Fox |
|
Sangamon River At Rt 48 At Decatur, Il
14 hours ago · USGS 05573540 |
101 cfs | 2.92 ft | 75°F | 75°F | 618 ft | Upper Sangamon |
|
East Branch Du Page River At Bolingbrook, Il
14 hours ago · USGS 05540250 |
99 cfs | 15.09 ft | · | 73°F | 640 ft | Des Plaines |
|
Big Muddy River At Rte 127 At Murphysboro, Il
14 hours ago · USGS 05599490 |
98 cfs | 3.41 ft | 83°F | 73°F | 357 ft | Big Muddy |
|
Pope Creek Near Keithsburg, Il
14 hours ago · USGS 05467000 |
97 cfs | 19.90 ft | · | 74°F | 550 ft | Flint-Henderson |
|
Iroquois River At Iroquois, Il
15 hours ago · USGS 05525000 |
95 cfs | 5.09 ft | · | 73°F | 638 ft | Iroquois |
|
La Moine River At Colmar, Il
14 hours ago · USGS 05584500 |
86 cfs | 4.15 ft | · | 74°F | 511 ft | La Moine |
|
Little Calumet River At South Holland, Il
14 hours ago · USGS 05536290 |
80 cfs | 5.60 ft | · | 75°F | 596 ft | Chicago |
|
Salt Fork Near St. Joseph, Il
14 hours ago · USGS 03336900 |
77 cfs | 3.72 ft | · | 71°F | 661 ft | Vermilion |
|
Kickapoo Creek At Waynesville, Il
15 hours ago · USGS 05580000 |
74 cfs | 2.99 ft | · | 73°F | 635 ft | Salt |
|
Big Muddy River At Plumfield, Il
14 hours ago · USGS 05597000 |
73 cfs | 2.60 ft | · | 74°F | 379 ft | Big Muddy |
|
Salt Creek At Elmhurst, Il
14 hours ago · USGS 05531300 |
69 cfs | 5.38 ft | · | 74°F | 670 ft | Des Plaines |
|
West Br Du Page River Near Warrenville, Il
15 hours ago · USGS 05540095 |
64 cfs | 7.82 ft | · | 73°F | 688 ft | Des Plaines |
|
Apple River Near Hanover, Il
15 hours ago · USGS 05419000 |
63 cfs | 4.07 ft | · | 72°F | 596 ft | Apple-Plum |
|
Vermilion River Near Leonore, Il
14 hours ago · USGS 05555300 |
61 cfs | 3.61 ft | 76°F | 73°F | 535 ft | Vermilion |
|
Hickory Creek At Joliet, Il
15 hours ago · USGS 05539000 |
60 cfs | 10.87 ft | · | 73°F | 535 ft | Des Plaines |
|
Vermilion River At Pontiac, Il
14 hours ago · USGS 05554500 |
54 cfs | 2.99 ft | 77°F | 74°F | 661 ft | Vermilion |
|
Sangamon River At Fisher, Il
15 hours ago · USGS 05570910 |
54 cfs | 5.57 ft | 82°F | 73°F | 693 ft | Upper Sangamon |
|
Elkhorn Creek Near Penrose, Il
14 hours ago · USGS 05444000 |
52 cfs | 2.86 ft | · | 73°F | 669 ft | Lower Rock |
|
Little Wabash River Below Clay City, Il
14 hours ago · USGS 03379500 |
48 cfs | 4.50 ft | · | 69°F | 477 ft | Little Wabash |
|
E Br Du Page River Near Downers Grove, Il
14 hours ago · USGS 05540160 |
47 cfs | 12.24 ft | · | 73°F | 675 ft | Des Plaines |
|
Thorn Creek At Thornton, Il
14 hours ago · USGS 05536275 |
44 cfs | 2.89 ft | · | 74°F | 603 ft | Chicago |
|
Sugar Creek At Milford, Il
15 hours ago · USGS 05525500 |
43 cfs | 3.23 ft | · | 73°F | 644 ft | Iroquois |
|
Thorn Creek At Glenwood, Il
15 hours ago · USGS 05536215 |
43 cfs | 2.67 ft | · | 74°F | 628 ft | Chicago |
|
W Branch Du Page River Nr West Chicago, Il
14 hours ago · USGS 05539900 |
42 cfs | 4.17 ft | · | 73°F | 723 ft | Des Plaines |
|
Blackberry Creek Near Yorkville, Il
14 hours ago · USGS 05551700 |
42 cfs | 3.50 ft | · | 72°F | 617 ft | Lower Fox |
|
South Branch Kishwaukee River Nr Fairdale Il, Il
14 hours ago · USGS 05439500 |
39 cfs | 1.96 ft | · | 72°F | 736 ft | Kishwaukee |
|
Mill Creek At Old Mill Creek, Il
15 hours ago · USGS 05527950 |
37 cfs | 6.58 ft | · | 72°F | 677 ft | Des Plaines |
|
Blackberry Creek Near Montgomery, Il
14 hours ago · USGS 05551675 |
37 cfs | 3.75 ft | · | 72°F | 661 ft | Lower Fox |
|
Des Plaines River At Russell, Il
14 hours ago · USGS 05527800 |
36 cfs | 4.39 ft | · | 72°F | 667 ft | Des Plaines |
|
Indian Creek Near Wyoming, Il
15 hours ago · USGS 05568800 |
36 cfs | 9.78 ft | · | 73°F | 623 ft | Spoon |
|
Sugar Creek Near Bloomington, Il
15 hours ago · USGS 05580950 |
34 cfs | 1.02 ft | · | 73°F | 749 ft | Salt |
|
Lake Fork At Atwood, Il
15 hours ago · USGS 05590800 |
34 cfs | 2.62 ft | · | 72°F | 661 ft | Upper Kaskaskia |
|
Kaskaskia River At Cooks Mills, Il
14 hours ago · USGS 05591200 |
32 cfs | 1.93 ft | · | 73°F | 641 ft | Upper Kaskaskia |
|
Shoal Creek Near Breese, Il
14 hours ago · USGS 05594000 |
28 cfs | 1.05 ft | · | 74°F | 456 ft | Shoal |
|
Nippersink Creek Above Wonder Lake, Il
14 hours ago · USGS 05548105 |
28 cfs | 4.86 ft | · | 72°F | 806 ft | Upper Fox |
|
Sinsinawa River Near Menominee, Il
15 hours ago · USGS 05414820 |
26 cfs | 4.77 ft | · | 71°F | 645 ft | Apple-Plum |
|
Embarras River Near Camargo, Il
15 hours ago · USGS 03343400 |
26 cfs | 3.05 ft | · | 73°F | 644 ft | Embarras |
|
Mazon River Near Coal City, Il
14 hours ago · USGS 05542000 |
21 cfs | 1.24 ft | · | 73°F | 529 ft | Upper Illinois |
|
Silver Creek Near Freeburg, Il
14 hours ago · USGS 05594800 |
20 cfs | · | · | 73°F | 418 ft | Lower Kaskaskia |
|
Robinson Creek Near Shelbyville, Il
15 hours ago · USGS 05592050 |
20 cfs | 2.21 ft | · | 72°F | 616 ft | Upper Kaskaskia |
|
Skokie River Near Highland Park, Il
14 hours ago · USGS 05535070 |
19 cfs | 3.12 ft | · | 74°F | 632 ft | Chicago |
|
Flag Creek Near Willow Springs, Il
15 hours ago · USGS 05533000 |
19 cfs | 3.44 ft | · | 74°F | 610 ft | Des Plaines |
|
Shoal Creek Nr Pierron, Il
15 hours ago · USGS 05593945 |
17 cfs | 42.26 ft | · | 74°F | 465 ft | Shoal |
|
Mill Creek At Milan, Il
14 hours ago · USGS 05448000 |
17 cfs | 1.80 ft | · | 75°F | 574 ft | Lower Rock |
|
Ferson Creek Near St. Charles, Il
15 hours ago · USGS 05551200 |
17 cfs | 1.50 ft | · | 72°F | 709 ft | Lower Fox |
|
Wf Of Nb Chicago River At Northbrook Il, Il
15 hours ago · USGS 05535500 |
15 cfs | 1.17 ft | · | 74°F | 653 ft | Chicago |
|
Addison Creek At Bellwood, Il
15 hours ago · USGS 05532000 |
15 cfs | 1.55 ft | · | 75°F | 627 ft | Des Plaines |
|
South Fork Sangamon River Nr Rochester, Il
14 hours ago · USGS 05576000 |
14 cfs | 5.41 ft | 75°F | 74°F | 518 ft | South Fork Sangamon |
|
Cahokia Creek At Edwardsville, Il
14 hours ago · USGS 05587900 |
14 cfs | 3.24 ft | · | 75°F | 456 ft | Cahokia-Joachim |
|
Big Bureau Creek At Princeton, Il
14 hours ago · USGS 05556500 |
13 cfs | 2.74 ft | · | 74°F | 603 ft | Lower Illinois-Senachwine Lake |
|
Skokie River At Lake Forest, Il
14 hours ago · USGS 05535000 |
12 cfs | 2.28 ft | · | 74°F | 664 ft | Chicago |
|
Tyler Creek At Elgin, Il
14 hours ago · USGS 05550300 |
12 cfs | 5.67 ft | · | 72°F | 751 ft | Upper Fox |
|
North Branch Chicago River At Deerfield, Il
14 hours ago · USGS 05534500 |
12 cfs | 4.94 ft | · | 74°F | 642 ft | Chicago |
|
Boone Creek Near Mc Henry, Il
14 hours ago · USGS 05549000 |
11 cfs | 1.03 ft | · | 72°F | 779 ft | Upper Fox |
|
Richland Creek Near Hecker, Il
14 hours ago · USGS 05595200 |
11 cfs | 26.87 ft | · | 73°F | 403 ft | Lower Kaskaskia |
|
Lake Fork Near Cornland, Il
14 hours ago · USGS 05579500 |
11 cfs | 3.46 ft | · | 74°F | 569 ft | Salt |
|
Poplar Creek At Elgin, Il
14 hours ago · USGS 05550500 |
11 cfs | 1.27 ft | · | 72°F | 730 ft | Upper Fox |
|
Deer Creek Near Chicago Heights, Il
14 hours ago · USGS 05536235 |
10 cfs | 3.36 ft | · | 74°F | 628 ft | Chicago |
|
Macoupin Creek Near Kane, Il
14 hours ago · USGS 05587000 |
10 cfs | 3.85 ft | · | 75°F | 445 ft | Macoupin |
|
Butterfield Creek At Flossmoor, Il
14 hours ago · USGS 05536255 |
9 cfs | 4.10 ft | · | 74°F | 635 ft | Chicago |
|
Skillet Fork At Wayne City, Il
15 hours ago · USGS 03380500 |
7 cfs | 5.02 ft | · | 71°F | 387 ft | Skillet |
|
Little Wabash River Near Effingham, Il
14 hours ago · USGS 03378635 |
7 cfs | 10.51 ft | · | 73°F | 542 ft | Little Wabash |
|
Hurricane Creek Near Mulberry Grove, Il
14 hours ago · USGS 05592800 |
7 cfs | 3.49 ft | · | 74°F | 551 ft | Middle Kaskaskia |
|
Farm Creek At Farmdale, Il
15 hours ago · USGS 05560500 |
7 cfs | · | · | 74°F | 541 ft | Lower Illinois-Senachwine Lake |
|
Salt Creek At Rolling Meadows, Il
14 hours ago · USGS 05530990 |
7 cfs | 2.43 ft | · | 74°F | 694 ft | Des Plaines |
|
Cache River At Forman, Il
15 hours ago · USGS 03612000 |
7 cfs | 8.82 ft | · | 72°F | 367 ft | Lower Ohio |
|
Sawmill Creek Near Lemont, Il
15 hours ago · USGS 05533400 |
7 cfs | 8.59 ft | · | 73°F | 647 ft | Des Plaines |
|
St. Joseph Creek At U.S. Route 34 At Lisle, Il
14 hours ago · USGS 05540195 |
6 cfs | 4.40 ft | · | 73°F | 673 ft | Des Plaines |
|
Tinley Creek Near Palos Park, Il
14 hours ago · USGS 05536500 |
6 cfs | 2.56 ft | · | 74°F | 608 ft | Chicago |
|
South Fork Saline River Nr Carrier Mills, Il
14 hours ago · USGS 03382100 |
6 cfs | 2.22 ft | · | 73°F | 415 ft | Saline |
|
Bear Creek Near Marcelline, Il
1 day ago · USGS 05495500 |
5 cfs | 2.38 ft | · | 74°F | 523 ft | Bear-Wyaconda |
|
Long Run Near Lemont, Il
15 hours ago · USGS 05537500 |
5 cfs | · | · | 73°F | 641 ft | Des Plaines |
|
Boneyard Creek At Lincoln Ave At Urbana, Il
14 hours ago · USGS 03337100 |
5 cfs | 7.53 ft | · | 74°F | 714 ft | Vermilion |
|
South Branch Kishwaukee River At Dekalb, Il
14 hours ago · USGS 05439000 |
5 cfs | 2.80 ft | · | 72°F | 846 ft | Kishwaukee |
|
Mc Donald Creek Near Mount Prospect, Il
14 hours ago · USGS 05529500 |
5 cfs | · | · | 74°F | 641 ft | Des Plaines |
|
Weller Creek At Des Plaines, Il
14 hours ago · USGS 05530000 |
4 cfs | · | · | 74°F | 648 ft | Des Plaines |
|
Spring Brook At 87th Street Near Naperville, Il
14 hours ago · USGS 05540275 |
4 cfs | 2.91 ft | · | 72°F | 652 ft | Des Plaines |
|
Kress Creek At West Chicago, Il
14 hours ago · USGS 05540060 |
3 cfs | 4.03 ft | · | 72°F | 706 ft | Des Plaines |
|
Buffalo Creek Near Wheeling, Il
15 hours ago · USGS 05528500 |
3 cfs | 1.58 ft | · | 74°F | 667 ft | Des Plaines |
|
Mill Creek Near Batavia, Il
14 hours ago · USGS 05551330 |
3 cfs | 2.13 ft | · | 72°F | 690 ft | Lower Fox |
|
Casey Fork At Mount Vernon, Il
14 hours ago · USGS 05595820 |
2 cfs | 1.54 ft | · | 72°F | 441 ft | Big Muddy |
|
Boneyard Creek At Urbana, Il
14 hours ago · USGS 03337000 |
2 cfs | 10.35 ft | · | 74°F | 717 ft | Vermilion |
|
Midlothian Creek At Oak Forest, Il
14 hours ago · USGS 05536340 |
2 cfs | 1.56 ft | · | 74°F | 629 ft | Chicago |
|
Silver Creek Near Troy, Il
15 hours ago · USGS 05594450 |
2 cfs | 3.74 ft | · | 74°F | 491 ft | Lower Kaskaskia |
|
North Fork Embarras River Near Oblong, Il
14 hours ago · USGS 03346000 |
1 cfs | 2.24 ft | · | 74°F | 498 ft | Embarras |
|
East Fork Shoal Creek Near Coffeen, Il
14 hours ago · USGS 05593900 |
1 cfs | 1.79 ft | · | 73°F | 590 ft | Shoal |
|
Indian Creek At Wanda, Il
15 hours ago · USGS 05588000 |
1 cfs | · | · | 74°F | 447 ft | Cahokia-Joachim |
|
Little Crooked Creek Near New Minden, Il
15 hours ago · USGS 05593575 |
1 cfs | 4.70 ft | · | 74°F | 485 ft | Middle Kaskaskia |
|
Spring Creek At Springfield, Il
15 hours ago · USGS 05577500 |
0 cfs | 1.54 ft | · | 77°F | 529 ft | Lower Sangamon |
|
Whitley Creek Near Allenville, Il
14 hours ago · USGS 05591550 |
0 cfs | 2.19 ft | · | 72°F | 625 ft | Upper Kaskaskia |
|
Lusk Creek Near Eddyville, Il
14 hours ago · USGS 03384450 |
0 cfs | 2.07 ft | · | 72°F | 388 ft | Lower Ohio-Bay |
|
Bonpas Creek At Browns, Il
14 hours ago · USGS 03378000 |
0 cfs | 1.27 ft | · | 72°F | 451 ft | Lower Wabash |
|
Hickory Creek Nr Brownstown, Il
14 hours ago · USGS 05592575 |
0 cfs | 4.19 ft | · | 74°F | 507 ft | Middle Kaskaskia |
|
Crab Orchard Creek Near Marion, Il
14 hours ago · USGS 05597500 |
0 cfs | · | · | 73°F | 430 ft | Big Muddy |
|
Fondulac Creek Near East Peoria, Il
14 hours ago · USGS 05561500 |
0 cfs | 1.37 ft | · | 74°F | 521 ft | Lower Illinois-Senachwine Lake |
|
Rayse Creek Near Waltonville, Il
14 hours ago · USGS 05595730 |
0 cfs | 1.16 ft | · | 72°F | 424 ft | Big Muddy |
|
West Okaw River Near Lovington, Il
14 hours ago · USGS 05591700 |
0 cfs | 2.82 ft | · | 73°F | 639 ft | Upper Kaskaskia |
|
East Fork Kaskaskia River Near Sandoval, Il
14 hours ago · USGS 05592900 |
0 cfs | 2.50 ft | · | 74°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 September 1, 2026, Illinois rivers are running at 105% of normal across 153 USGS streamgauges, and the Mississippi River At Thebes is reporting the highest discharge at 140,000 cfs. The full sortable gauge table is below.
Which Illinois river is running highest right now?
As of September 1, 2026, the highest discharge in Illinois is 140,000 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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