Flow report
Illinois River Levels & Streamflow
As of Oct 20, 2026, Illinois rivers are running at 142% of normal across 150 USGS gauges — the highest is 188,000 cfs on the Mississippi River At Thebes. Live discharge, gauge height, and percent-of-normal for every USGS streamgauge in Illinois.
USGS gauges
150
State percent normal
142%
0%normal200%
Paddle runs
0
Updated
Oct 20
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Flow briefing · Oct 20, 2026
Illinois river conditions today
Where rivers are running versus normal, what’s spiking and what’s coming — refreshed daily from USGS and NOAA.
Streamflow levels across Illinois are currently 142% of normal, with the Mississippi River At Thebes reporting the highest discharge in the state at 188,000 cfs and a gauge stage of 16.55 ft.
Meanwhile, the Illinois River At Henry is seeing a spike today — up 20% 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
A Dense Fog Advisory is in effect across northern Illinois until 10:00 AM CDT on October 20th, affecting critical commuter areas including Cook, DuPage, Lake, McHenry, Boone, and Kane Counties. Visibility has been reduced to one quarter mile or less, creating hazardous driving conditions for residents in Chicago and surrounding communities. Motorists are urged to exercise extreme caution, reduce speed, and increase following distances. The advisory primarily impacts the northern portions of Cook and DuPage Counties. Conditions are expected to improve by mid-morning as fog dissipates.
A Dense Fog Advisory is in effect across northern Illinois until 10:00 AM CDT on October 20th, affecting critical commuter areas including Cook, DuPage, Lake, McHenry, Boone, and Kane Counties. Visibility has been reduced to one quarter mile or less, creating hazardous driving conditions for residents in Chicago and surrounding communities. Motorists are urged to exercise extreme caution, reduce speed, and increase following distances. The advisory primarily impacts the northern portions of Cook and DuPage Counties. Conditions are expected to improve by mid-morning as fog dissipates.
Illinois vs normal
How Illinois’s rivers compare to normal
Every gauge placed by its own percent of normal, and three years of the statewide trend.
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 Oct 2023. The dotted line is normal.
142%
of normal today
+92pts
vs this day last year (50%)
279of 366
days below normal, past year
316%
3-year peak · Oct 2026 · above the axis
50%
100% normal
150%
200%
Oct 2023
202420252026
Oct 20, 2026
799 daily readings from 147 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 225%: 12 readings above that — including the 316% peak in Oct 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.
Illinois flow report
| Streamgage | Streamflow | Gage height | Water temp | Air temp | Elevation | Watershed |
|---|---|---|---|---|---|---|
|
Mississippi River At Thebes, Il
10 hours ago · USGS 07022000 |
188,000 cfs | 16.35 ft | · | 50°F | 321 ft | Upper Mississippi-Cape Girardeau |
|
Mississippi River At Chester, Il
10 hours ago · USGS 07020500 |
188,000 cfs | 12.29 ft | · | 46°F | 358 ft | Upper Mississippi-Cape Girardeau |
|
Illinois River At Kingston Mines, Il
12 hours ago · USGS 05568500 |
13,900 cfs | 6.29 ft | · | 42°F | 441 ft | Lower Illinois-Lake Chautauqua |
|
Illinois River At Valley City, Il
11 hours ago · USGS 05586100 |
12,200 cfs | 3.76 ft | · | 44°F | 433 ft | Lower Illinois |
|
Illinois River At Henry, Il
12 hours ago · USGS 05558300 |
10,300 cfs | 15.19 ft | 60°F | 41°F | 440 ft | Lower Illinois-Senachwine Lake |
|
Wabash River At Mt. Carmel, Il
11 hours ago · USGS 03377500 |
9,110 cfs | 3.97 ft | · | 48°F | 391 ft | Lower Wabash |
|
Rock River Near Joslin, Il
12 hours ago · USGS 05446500 |
7,480 cfs | 7.32 ft | 34°F | 40°F | 588 ft | Lower Rock |
|
Rock River At Como, Il
11 hours ago · USGS 05443500 |
7,390 cfs | 5.15 ft | · | 40°F | 618 ft | Lower Rock |
|
Illinois River At Marseilles, Il
12 hours ago · USGS 05543500 |
6,590 cfs | 11.94 ft | · | 43°F | 459 ft | Upper Illinois |
|
Rock River At Byron, Il
12 hours ago · USGS 05440700 |
6,390 cfs | 7.10 ft | 56°F | 41°F | 677 ft | Lower Rock |
|
Rock River At Rockton, Il
12 hours ago · USGS 05437500 |
4,730 cfs | 5.12 ft | · | 42°F | 712 ft | Lower Rock |
|
Fox River At Dayton, Il
12 hours ago · USGS 05552500 |
2,390 cfs | 7.15 ft | · | 43°F | 472 ft | Lower Fox |
|
Kankakee River Near Wilmington, Il
13 hours ago · USGS 05527500 |
2,010 cfs | 1.50 ft | 56°F | 44°F | 511 ft | Kankakee |
|
Pecatonica River Nr Shirland, Il
11 hours ago · USGS 05437050 |
1,960 cfs | 6.18 ft | · | 42°F | 718 ft | Pecatonica |
|
Kankakee River At Momence, Il
12 hours ago · USGS 05520500 |
1,580 cfs | 2.01 ft | · | 42°F | 610 ft | Kankakee |
|
Fox River At Montgomery, Il
11 hours ago · USGS 05551540 |
1,300 cfs | 11.62 ft | · | 41°F | 613 ft | Lower Fox |
|
Pecatonica River At Freeport, Il
12 hours ago · USGS 05435500 |
1,140 cfs | 5.89 ft | · | 39°F | 754 ft | Pecatonica |
|
Spoon River At Seville, Il
12 hours ago · USGS 05570000 |
1,130 cfs | 8.35 ft | 53°F | 38°F | 498 ft | Spoon |
|
Fox River At South Elgin, Il
12 hours ago · USGS 05551000 |
972 cfs | 12.57 ft | · | 42°F | 696 ft | Lower Fox |
|
Green River Near Geneseo, Il
12 hours ago · USGS 05447500 |
937 cfs | 4.71 ft | 58°F | 40°F | 586 ft | Green |
|
Spoon River At London Mills, Il
12 hours ago · USGS 05569500 |
852 cfs | 4.83 ft | 77°F | 40°F | 557 ft | Spoon |
|
Fox River At Algonquin (Tailwater), Il
12 hours ago · USGS 05550001 |
842 cfs | 5.71 ft | 32°F | 41°F | 727 ft | Upper Fox |
|
Kishwaukee River Near Perryville, Il
12 hours ago · USGS 05440000 |
763 cfs | 6.28 ft | · | 42°F | 701 ft | Kishwaukee |
|
Henderson Creek Near Oquawka, Il
12 hours ago · USGS 05469000 |
507 cfs | 15.95 ft | · | 43°F | 611 ft | Flint-Henderson |
|
Kaskaskia River At New Athens, Il
12 hours ago · USGS 05595000 |
497 cfs | 68.71 ft | 73°F | 46°F | 403 ft | Lower Kaskaskia |
|
Des Plaines River At Riverside, Il
12 hours ago · USGS 05532500 |
475 cfs | 2.53 ft | · | 46°F | 598 ft | Des Plaines |
|
Sangamon River Near Oakford, Il
12 hours ago · USGS 05583000 |
415 cfs | 3.43 ft | 93°F | 39°F | 457 ft | Lower Sangamon |
|
Du Page River At Shorewood, Il
12 hours ago · USGS 05540500 |
375 cfs | 10.69 ft | · | 45°F | 566 ft | Des Plaines |
|
Kishwaukee River At Belvidere, Il
12 hours ago · USGS 05438500 |
335 cfs | 1.88 ft | · | 42°F | 740 ft | Kishwaukee |
|
Edwards River Near New Boston, Il
12 hours ago · USGS 05466500 |
326 cfs | 14.16 ft | · | 42°F | 561 ft | Flint-Henderson |
|
Iroquois River Near Chebanse, Il
12 hours ago · USGS 05526000 |
228 cfs | 2.87 ft | · | 41°F | 600 ft | Iroquois |
|
Salt Creek Near Greenview, Il
12 hours ago · USGS 05582000 |
210 cfs | 1.34 ft | 83°F | 39°F | 481 ft | Salt |
|
Sangamon River At Petersburg, Il
12 hours ago · USGS 05578000 |
167 cfs | 4.47 ft | 77°F | 39°F | 489 ft | Lower Sangamon |
|
La Moine River At Ripley, Il
12 hours ago · USGS 05585000 |
157 cfs | 5.53 ft | · | 42°F | 467 ft | La Moine |
|
Kaskaskia River Near Venedy Station, Il
12 hours ago · USGS 05594100 |
154 cfs | 1.23 ft | · | 46°F | 395 ft | Lower Kaskaskia |
|
South Branch Kishwaukee River Nr Fairdale Il, Il
12 hours ago · USGS 05439500 |
153 cfs | 2.59 ft | · | 41°F | 736 ft | Kishwaukee |
|
Nippersink Creek Near Spring Grove, Il
11 hours ago · USGS 05548280 |
148 cfs | 4.58 ft | · | 40°F | 754 ft | Upper Fox |
|
Des Plaines River Near Gurnee, Il
12 hours ago · USGS 05528000 |
132 cfs | 2.88 ft | · | 42°F | 664 ft | Des Plaines |
|
Vermilion River Near Danville, Il
12 hours ago · USGS 03339000 |
131 cfs | 2.62 ft | 64°F | 39°F | 517 ft | Vermilion |
|
West Branch Du Page River Near Naperville, Il
12 hours ago · USGS 05540130 |
122 cfs | 4.44 ft | · | 43°F | 637 ft | Des Plaines |
|
Big Bureau Creek At Princeton, Il
12 hours ago · USGS 05556500 |
118 cfs | 3.14 ft | · | 44°F | 603 ft | Lower Illinois-Senachwine Lake |
|
Iroquois River At Iroquois, Il
11 hours ago · USGS 05525000 |
114 cfs | 5.47 ft | · | 40°F | 638 ft | Iroquois |
|
East Branch Du Page River At Bolingbrook, Il
12 hours ago · USGS 05540250 |
113 cfs | 14.98 ft | · | 43°F | 640 ft | Des Plaines |
|
Des Plaines River Near Des Plaines, Il
12 hours ago · USGS 05529000 |
113 cfs | 9.17 ft | · | 47°F | 625 ft | Des Plaines |
|
Sangamon River At Riverton, Il
12 hours ago · USGS 05576500 |
109 cfs | 2.36 ft | · | 42°F | 519 ft | Lower Sangamon |
|
Apple River Near Hanover, Il
12 hours ago · USGS 05419000 |
107 cfs | 4.26 ft | · | 44°F | 596 ft | Apple-Plum |
|
Big Muddy River At Rte 127 At Murphysboro, Il
11 hours ago · USGS 05599490 |
102 cfs | 3.34 ft | 65°F | 47°F | 357 ft | Big Muddy |
|
Pope Creek Near Keithsburg, Il
12 hours ago · USGS 05467000 |
100 cfs | 19.93 ft | · | 45°F | 550 ft | Flint-Henderson |
|
Elkhorn Creek Near Penrose, Il
12 hours ago · USGS 05444000 |
94 cfs | 3.26 ft | · | 40°F | 669 ft | Lower Rock |
|
Little Wabash River Below Clay City, Il
12 hours ago · USGS 03379500 |
87 cfs | 5.16 ft | · | 43°F | 477 ft | Little Wabash |
|
La Moine River At Colmar, Il
12 hours ago · USGS 05584500 |
84 cfs | 4.29 ft | · | 44°F | 511 ft | La Moine |
|
Mackinaw River Near Green Valley, Il
12 hours ago · USGS 05568000 |
83 cfs | 13.85 ft | 75°F | 42°F | 501 ft | Mackinaw |
|
Kaskaskia River At Carlyle, Il
11 hours ago · USGS 05593000 |
82 cfs | 5.72 ft | · | 47°F | 413 ft | Middle Kaskaskia |
|
Kaskaskia River At Vandalia, Il
11 hours ago · USGS 05592500 |
78 cfs | 2.91 ft | · | 45°F | 537 ft | Middle Kaskaskia |
|
West Br Du Page River Near Warrenville, Il
12 hours ago · USGS 05540095 |
76 cfs | 7.90 ft | · | 42°F | 688 ft | Des Plaines |
|
Blackberry Creek Near Yorkville, Il
12 hours ago · USGS 05551700 |
75 cfs | 3.97 ft | · | 43°F | 617 ft | Lower Fox |
|
Embarras River At Lawrenceville, Il
12 hours ago · USGS 03346500 |
72 cfs | 16.69 ft | 61°F | 43°F | 424 ft | Embarras |
|
Indian Creek Near Wyoming, Il
12 hours ago · USGS 05568800 |
69 cfs | 10.15 ft | · | 42°F | 623 ft | Spoon |
|
South Branch Kishwaukee River At Dekalb, Il
12 hours ago · USGS 05439000 |
69 cfs | 3.62 ft | · | 45°F | 846 ft | Kishwaukee |
|
Kaskaskia River At Shelbyville, Il
11 hours ago · USGS 05592000 |
67 cfs | 6.42 ft | · | 42°F | 568 ft | Upper Kaskaskia |
|
Mackinaw River Near Congerville, Il
12 hours ago · USGS 05567500 |
64 cfs | 1.14 ft | 47°F | 43°F | 611 ft | Mackinaw |
|
Little Wabash River At Carmi, Il
12 hours ago · USGS 03381500 |
63 cfs | 2.38 ft | · | 49°F | 419 ft | Little Wabash |
|
Blackberry Creek Near Montgomery, Il
12 hours ago · USGS 05551675 |
60 cfs | 3.98 ft | · | 41°F | 661 ft | Lower Fox |
|
Hickory Creek At Joliet, Il
12 hours ago · USGS 05539000 |
60 cfs | 10.87 ft | · | 45°F | 535 ft | Des Plaines |
|
Embarras River At Ste. Marie, Il
12 hours ago · USGS 03345500 |
58 cfs | · | · | 42°F | 499 ft | Embarras |
|
Vermilion River Near Leonore, Il
12 hours ago · USGS 05555300 |
57 cfs | 3.59 ft | 76°F | 43°F | 535 ft | Vermilion |
|
Kaskaskia River Near Cowden, Il
11 hours ago · USGS 05592100 |
56 cfs | 2.29 ft | · | 43°F | 553 ft | Upper Kaskaskia |
|
Salt Creek At Elmhurst, Il
12 hours ago · USGS 05531300 |
55 cfs | 5.25 ft | · | 45°F | 670 ft | Des Plaines |
|
Little Calumet River At South Holland, Il
12 hours ago · USGS 05536290 |
51 cfs | 5.40 ft | · | 46°F | 596 ft | Chicago |
|
Nippersink Creek Above Wonder Lake, Il
12 hours ago · USGS 05548105 |
50 cfs | 5.04 ft | · | 40°F | 806 ft | Upper Fox |
|
Big Muddy River At Plumfield, Il
11 hours ago · USGS 05597000 |
48 cfs | 2.52 ft | · | 49°F | 379 ft | Big Muddy |
|
North Branch Chicago River At Niles, Il
12 hours ago · USGS 05536000 |
47 cfs | 1.02 ft | · | 49°F | 608 ft | Chicago |
|
Mill Creek At Old Mill Creek, Il
11 hours ago · USGS 05527950 |
45 cfs | 6.72 ft | · | 41°F | 677 ft | Des Plaines |
|
Sangamon River At Monticello, Il
11 hours ago · USGS 05572000 |
43 cfs | 4.99 ft | 77°F | 41°F | 646 ft | Upper Sangamon |
|
Thorn Creek At Thornton, Il
11 hours ago · USGS 05536275 |
42 cfs | 2.81 ft | · | 44°F | 603 ft | Chicago |
|
Mill Creek At Milan, Il
11 hours ago · USGS 05448000 |
39 cfs | 2.12 ft | · | 44°F | 574 ft | Lower Rock |
|
Sugar Creek Near Bloomington, Il
12 hours ago · USGS 05580950 |
38 cfs | 1.05 ft | · | 43°F | 749 ft | Salt |
|
Mazon River Near Coal City, Il
12 hours ago · USGS 05542000 |
38 cfs | 1.42 ft | · | 43°F | 529 ft | Upper Illinois |
|
Des Plaines River At Russell, Il
12 hours ago · USGS 05527800 |
37 cfs | 4.41 ft | · | 42°F | 667 ft | Des Plaines |
|
W Branch Du Page River Nr West Chicago, Il
12 hours ago · USGS 05539900 |
34 cfs | 4.11 ft | · | 42°F | 723 ft | Des Plaines |
|
Silver Creek Near Freeburg, Il
11 hours ago · USGS 05594800 |
34 cfs | · | · | 46°F | 418 ft | Lower Kaskaskia |
|
Shoal Creek Near Breese, Il
11 hours ago · USGS 05594000 |
33 cfs | 1.23 ft | · | 47°F | 456 ft | Shoal |
|
Ferson Creek Near St. Charles, Il
12 hours ago · USGS 05551200 |
32 cfs | 1.86 ft | · | 41°F | 709 ft | Lower Fox |
|
E Br Du Page River Near Downers Grove, Il
12 hours ago · USGS 05540160 |
28 cfs | 12.13 ft | · | 44°F | 675 ft | Des Plaines |
|
Vermilion River At Pontiac, Il
12 hours ago · USGS 05554500 |
27 cfs | 2.80 ft | 77°F | 44°F | 661 ft | Vermilion |
|
Kaskaskia River At Cooks Mills, Il
11 hours ago · USGS 05591200 |
27 cfs | 1.71 ft | · | 41°F | 641 ft | Upper Kaskaskia |
|
Salt Creek At Western Springs, Il
12 hours ago · USGS 05531500 |
23 cfs | 1.84 ft | · | 46°F | 634 ft | Des Plaines |
|
Thorn Creek At Glenwood, Il
12 hours ago · USGS 05536215 |
23 cfs | 2.57 ft | · | 41°F | 628 ft | Chicago |
|
Flag Creek Near Willow Springs, Il
12 hours ago · USGS 05533000 |
23 cfs | 3.42 ft | · | 44°F | 610 ft | Des Plaines |
|
Sugar Creek At Milford, Il
11 hours ago · USGS 05525500 |
21 cfs | 2.82 ft | · | 41°F | 644 ft | Iroquois |
|
Middle Fork Vermilion River Above Oakwood, Il
12 hours ago · USGS 03336645 |
21 cfs | · | · | 39°F | 560 ft | Vermilion |
|
Salt Creek Near Rowell, Il
12 hours ago · USGS 05578500 |
21 cfs | 9.09 ft | 77°F | 48°F | 634 ft | Salt |
|
Embarras River Near Camargo, Il
6 days ago · USGS 03343400 |
20 cfs | 3.10 ft | · | 39°F | 644 ft | Embarras |
|
Addison Creek At Bellwood, Il
12 hours ago · USGS 05532000 |
20 cfs | 1.62 ft | · | 46°F | 627 ft | Des Plaines |
|
Kickapoo Creek At Waynesville, Il
12 hours ago · USGS 05580000 |
19 cfs | 2.47 ft | · | 41°F | 635 ft | Salt |
|
Sinsinawa River Near Menominee, Il
12 hours ago · USGS 05414820 |
19 cfs | 4.76 ft | · | 41°F | 645 ft | Apple-Plum |
|
Salt Fork Near St. Joseph, Il
12 hours ago · USGS 03336900 |
18 cfs | 3.24 ft | · | 41°F | 661 ft | Vermilion |
|
Shoal Creek Nr Pierron, Il
12 hours ago · USGS 05593945 |
17 cfs | 42.19 ft | · | 46°F | 465 ft | Shoal |
|
Boone Creek Near Mc Henry, Il
12 hours ago · USGS 05549000 |
15 cfs | 1.13 ft | · | 40°F | 779 ft | Upper Fox |
|
Sangamon River At Fisher, Il
12 hours ago · USGS 05570910 |
14 cfs | 4.62 ft | 79°F | 42°F | 693 ft | Upper Sangamon |
|
Richland Creek Near Hecker, Il
11 hours ago · USGS 05595200 |
13 cfs | 27.02 ft | · | 46°F | 403 ft | Lower Kaskaskia |
|
Tyler Creek At Elgin, Il
12 hours ago · USGS 05550300 |
13 cfs | 5.75 ft | · | 42°F | 751 ft | Upper Fox |
|
Macoupin Creek Near Kane, Il
12 hours ago · USGS 05587000 |
12 cfs | 3.84 ft | · | 43°F | 445 ft | Macoupin |
|
Sangamon River At Rt 48 At Decatur, Il
12 hours ago · USGS 05573540 |
12 cfs | 1.96 ft | 82°F | 42°F | 618 ft | Upper Sangamon |
|
Long Run Near Lemont, Il
11 hours ago · USGS 05537500 |
11 cfs | 1.03 ft | · | 43°F | 641 ft | Des Plaines |
|
Poplar Creek At Elgin, Il
11 hours ago · USGS 05550500 |
10 cfs | 1.26 ft | · | 42°F | 730 ft | Upper Fox |
|
Mill Creek Near Batavia, Il
11 hours ago · USGS 05551330 |
10 cfs | 2.38 ft | · | 41°F | 690 ft | Lower Fox |
|
Kress Creek At West Chicago, Il
12 hours ago · USGS 05540060 |
9 cfs | 4.20 ft | · | 42°F | 706 ft | Des Plaines |
|
Bear Creek Near Marcelline, Il
12 hours ago · USGS 05495500 |
8 cfs | 2.43 ft | · | 45°F | 523 ft | Bear-Wyaconda |
|
Lake Fork Near Cornland, Il
12 hours ago · USGS 05579500 |
7 cfs | 3.32 ft | · | 41°F | 569 ft | Salt |
|
Deer Creek Near Chicago Heights, Il
11 hours ago · USGS 05536235 |
7 cfs | 3.30 ft | · | 41°F | 628 ft | Chicago |
|
Wf Of Nb Chicago River At Northbrook Il, Il
11 hours ago · USGS 05535500 |
6 cfs | · | · | 46°F | 653 ft | Chicago |
|
Butterfield Creek At Flossmoor, Il
12 hours ago · USGS 05536255 |
5 cfs | 4.01 ft | · | 44°F | 635 ft | Chicago |
|
North Fork Embarras River Near Oblong, Il
11 hours ago · USGS 03346000 |
5 cfs | 2.10 ft | · | 41°F | 498 ft | Embarras |
|
Salt Creek At Rolling Meadows, Il
12 hours ago · USGS 05530990 |
5 cfs | 2.33 ft | · | 46°F | 694 ft | Des Plaines |
|
South Fork Sangamon River Nr Rochester, Il
12 hours ago · USGS 05576000 |
4 cfs | 5.02 ft | 81°F | 42°F | 518 ft | South Fork Sangamon |
|
Skokie River Near Highland Park, Il
11 hours ago · USGS 05535070 |
4 cfs | 2.68 ft | · | 50°F | 632 ft | Chicago |
|
Tinley Creek Near Palos Park, Il
12 hours ago · USGS 05536500 |
4 cfs | 2.58 ft | · | 46°F | 608 ft | Chicago |
|
Hurricane Creek Near Mulberry Grove, Il
11 hours ago · USGS 05592800 |
4 cfs | 3.61 ft | · | 45°F | 551 ft | Middle Kaskaskia |
|
Sawmill Creek Near Lemont, Il
11 hours ago · USGS 05533400 |
3 cfs | 8.41 ft | · | 44°F | 647 ft | Des Plaines |
|
Silver Creek Near Troy, Il
12 hours ago · USGS 05594450 |
3 cfs | 3.79 ft | · | 46°F | 491 ft | Lower Kaskaskia |
|
Skokie River At Lake Forest, Il
11 hours ago · USGS 05535000 |
3 cfs | 2.01 ft | · | 48°F | 664 ft | Chicago |
|
North Branch Chicago River At Deerfield, Il
11 hours ago · USGS 05534500 |
3 cfs | 4.41 ft | · | 47°F | 642 ft | Chicago |
|
St. Joseph Creek At U.S. Route 34 At Lisle, Il
12 hours ago · USGS 05540195 |
3 cfs | 4.29 ft | · | 44°F | 673 ft | Des Plaines |
|
Mc Donald Creek Near Mount Prospect, Il
12 hours ago · USGS 05529500 |
2 cfs | · | · | 44°F | 641 ft | Des Plaines |
|
Casey Fork At Mount Vernon, Il
11 hours ago · USGS 05595820 |
2 cfs | 1.62 ft | · | 47°F | 441 ft | Big Muddy |
|
Buffalo Creek Near Wheeling, Il
12 hours ago · USGS 05528500 |
2 cfs | 1.55 ft | · | 43°F | 667 ft | Des Plaines |
|
South Fork Saline River Nr Carrier Mills, Il
12 hours ago · USGS 03382100 |
2 cfs | 2.22 ft | · | 47°F | 415 ft | Saline |
|
Spring Brook At 87th Street Near Naperville, Il
12 hours ago · USGS 05540275 |
2 cfs | 2.89 ft | · | 43°F | 652 ft | Des Plaines |
|
Weller Creek At Des Plaines, Il
11 hours ago · USGS 05530000 |
2 cfs | · | · | 45°F | 648 ft | Des Plaines |
|
Boneyard Creek At Lincoln Ave At Urbana, Il
11 hours ago · USGS 03337100 |
2 cfs | 7.48 ft | · | 42°F | 714 ft | Vermilion |
|
Boneyard Creek At Urbana, Il
12 hours ago · USGS 03337000 |
2 cfs | 10.25 ft | · | 42°F | 717 ft | Vermilion |
|
Midlothian Creek At Oak Forest, Il
12 hours ago · USGS 05536340 |
2 cfs | 1.57 ft | · | 45°F | 629 ft | Chicago |
|
Cache River At Forman, Il
11 hours ago · USGS 03612000 |
1 cfs | 8.24 ft | · | 49°F | 367 ft | Lower Ohio |
|
Cahokia Creek At Edwardsville, Il
12 hours ago · USGS 05587900 |
1 cfs | 3.23 ft | · | 45°F | 456 ft | Cahokia-Joachim |
|
Little Crooked Creek Near New Minden, Il
12 hours ago · USGS 05593575 |
1 cfs | 4.94 ft | · | 46°F | 485 ft | Middle Kaskaskia |
|
Farm Creek At Farmdale, Il
11 hours ago · USGS 05560500 |
1 cfs | · | · | 44°F | 541 ft | Lower Illinois-Senachwine Lake |
|
Bonpas Creek At Browns, Il
12 hours ago · USGS 03378000 |
1 cfs | 1.48 ft | · | 48°F | 451 ft | Lower Wabash |
|
Little Wabash River Near Effingham, Il
12 hours ago · USGS 03378635 |
1 cfs | 10.41 ft | · | 42°F | 542 ft | Little Wabash |
|
Indian Creek At Wanda, Il
12 hours ago · USGS 05588000 |
1 cfs | · | · | 45°F | 447 ft | Cahokia-Joachim |
|
Spring Creek At Springfield, Il
12 hours ago · USGS 05577500 |
0 cfs | 1.41 ft | · | 42°F | 529 ft | Lower Sangamon |
|
East Fork Shoal Creek Near Coffeen, Il
11 hours ago · USGS 05593900 |
0 cfs | 1.90 ft | · | 45°F | 590 ft | Shoal |
|
East Fork Kaskaskia River Near Sandoval, Il
11 hours ago · USGS 05592900 |
0 cfs | 2.42 ft | · | 46°F | 491 ft | Middle Kaskaskia |
|
Lusk Creek Near Eddyville, Il
11 hours ago · USGS 03384450 |
0 cfs | 1.87 ft | · | 49°F | 388 ft | Lower Ohio-Bay |
|
Crab Orchard Creek Near Marion, Il
11 hours ago · USGS 05597500 |
0 cfs | · | · | 48°F | 430 ft | Big Muddy |
|
Rayse Creek Near Waltonville, Il
11 hours ago · USGS 05595730 |
0 cfs | 1.20 ft | · | 45°F | 424 ft | Big Muddy |
|
Hickory Creek Nr Brownstown, Il
11 hours ago · USGS 05592575 |
0 cfs | 3.89 ft | · | 45°F | 507 ft | Middle Kaskaskia |
|
Fondulac Creek Near East Peoria, Il
12 hours ago · USGS 05561500 |
0 cfs | 1.37 ft | · | 44°F | 521 ft | Lower Illinois-Senachwine Lake |
|
Whitley Creek Near Allenville, Il
11 hours ago · USGS 05591550 |
0 cfs | 2.19 ft | · | 42°F | 625 ft | Upper Kaskaskia |
|
West Okaw River Near Lovington, Il
11 hours ago · USGS 05591700 |
0 cfs | 2.24 ft | · | 40°F | 639 ft | Upper Kaskaskia |
Flow report FAQ
About Illinois streamflow
What are river levels like in Illinois right now?
As of October 20, 2026, Illinois rivers are running at 142% of normal across 150 USGS streamgauges, and the Mississippi River At Thebes is reporting the highest discharge at 188,000 cfs. The full sortable gauge table is below.
Which Illinois river is running highest right now?
As of October 20, 2026, the highest discharge in Illinois is 188,000 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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