Flow report
Iowa River Levels & Streamflow
As of Aug 16, 2026, Iowa rivers are running at 286% of normal across 117 USGS gauges — the highest is 30,500 cfs on the Mississippi River At Clinton. Live discharge, gauge height, and percent-of-normal for every USGS streamgauge in Iowa.
USGS gauges
117
State percent normal
286%
Paddle runs
0
Updated
Aug 16
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Every USGS streamgauge filtered to Iowa.
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August
16
2026
Flow briefing
Streamflow levels across Iowa are currently 286% of normal, with the Mississippi River At Clinton reporting the highest discharge in the state at 30,500 cfs and a gauge stage of 9.44 ft.
Meanwhile, the Big Creek Near Mt. Pleasant is seeing a spike today — up 1090% 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 Iowa's named rivers.
River levels near Iowa towns
Active weather warnings for Iowa
# Iowa Storm Center Report
Iowa residents should exercise caution as multiple weather threats impact the state. A Special Weather Statement remains in effect until 9:30 AM CDT as showers and thunderstorms move across southwestern and south-central Iowa, with dangerous wind gusts of 40-50 MPH expected primarily near and south of Highway 34. Additionally, a Flood Warning continues through Monday afternoon for the Skunk River at Augusta, affecting Des Moines, Henry, and Lee Counties, where minor flooding is occurring. The river crested at 16.2 feet overnight and is expected to fall below flood stage early Monday morning. Residents in affected areas should remain alert, avoid flooded roadways, and secure outdoor items that could be damaged by high winds.
Iowa residents should exercise caution as multiple weather threats impact the state. A Special Weather Statement remains in effect until 9:30 AM CDT as showers and thunderstorms move across southwestern and south-central Iowa, with dangerous wind gusts of 40-50 MPH expected primarily near and south of Highway 34. Additionally, a Flood Warning continues through Monday afternoon for the Skunk River at Augusta, affecting Des Moines, Henry, and Lee Counties, where minor flooding is occurring. The river crested at 16.2 feet overnight and is expected to fall below flood stage early Monday morning. Residents in affected areas should remain alert, avoid flooded roadways, and secure outdoor items that could be damaged by high winds.
Iowa at a glance
State-wide streamflow overview
The Iowa 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
286%
100% is the historical norm. Below 70% indicates drought; above 130% can flag elevated flood risk.
Highest discharge
Mississippi River At Clinton
30,500 cfs
Gauge stage 9.44 ft
Biggest 24h spike
Big Creek Near Mt. Pleasant
+1090%
Now 753 cfs
Network coverage
Gauges + rivers tracked
117 + 0
USGS gauges feeding 0 named rivers in Iowa.
Full streamgauge inventory
Iowa USGS streamgauges
Every USGS gauge Snoflo tracks in Iowa. 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 Clinton, Ia
11 hours ago · USGS 05420500 |
36,800 cfs | 9.32 ft | 78°F | 72°F | 593 ft | Copperas-Duck |
|
Iowa River At Wapello, Ia
11 hours ago · USGS 05465500 |
25,700 cfs | 18.90 ft | 49°F | 72°F | 554 ft | Lower Iowa |
|
Des Moines River At Ottumwa, Ia
10 hours ago · USGS 05489500 |
25,000 cfs | 8.81 ft | 80°F | 72°F | 635 ft | Lower Des Moines |
|
Skunk River At Augusta, Ia
11 hours ago · USGS 05474000 |
22,900 cfs | 15.88 ft | · | 72°F | 553 ft | Skunk |
|
Des Moines River Near Tracy, Ia
11 hours ago · USGS 05488500 |
22,400 cfs | 9.62 ft | · | 71°F | 676 ft | Lower Des Moines |
|
Des Moines River Near Pella, Ia
11 hours ago · USGS 05488110 |
22,300 cfs | 93.19 ft | 80°F | 71°F | 689 ft | Lower Des Moines |
|
Des Moines River At Keosauqua, Ia
11 hours ago · USGS 05490500 |
18,800 cfs | 15.62 ft | 79°F | 74°F | 579 ft | Lower Des Moines |
|
Cedar River At Cedar Rapids, Ia
11 hours ago · USGS 05464500 |
10,900 cfs | 6.62 ft | 62°F | 71°F | 712 ft | Middle Cedar |
|
Des Moines River Blw Raccoon Riv At Des Moines, Ia
11 hours ago · USGS 05485500 |
9,750 cfs | 15.40 ft | · | 71°F | 779 ft | Lake Red Rock |
|
Cedar River Near Conesville, Ia
2 days ago · USGS 05465000 |
9,350 cfs | 9.28 ft | · | 72°F | 593 ft | Lower Cedar |
|
Cedar River At Waterloo, Ia
11 hours ago · USGS 05464000 |
6,920 cfs | 7.51 ft | · | 70°F | 823 ft | Middle Cedar |
|
Des Moines River At 2nd Avenue, Ia
11 hours ago · USGS 05482000 |
5,960 cfs | 17.45 ft | 32°F | 71°F | 808 ft | Middle Des Moines |
|
Des Moines River Near Saylorville, Ia
11 hours ago · USGS 05481650 |
5,900 cfs | 7.17 ft | · | 71°F | 819 ft | Middle Des Moines |
|
Cedar River At Cedar Falls, Ia
11 hours ago · USGS 05463050 |
5,460 cfs | 78.70 ft | · | 70°F | 853 ft | Middle Cedar |
|
Iowa River Near Lone Tree, Ia
11 hours ago · USGS 05455700 |
5,330 cfs | 9.28 ft | · | 72°F | 601 ft | Lower Iowa |
|
Raccoon River At Fleur Drive, Ia
11 hours ago · USGS 05484900 |
5,030 cfs | 5.93 ft | · | 71°F | 797 ft | North Raccoon |
|
South Skunk River Near Oskaloosa, Ia
11 hours ago · USGS 05471500 |
4,940 cfs | 16.57 ft | · | 71°F | 692 ft | South Skunk |
|
Wapsipinicon River Near De Witt, Ia
11 hours ago · USGS 05422000 |
4,690 cfs | 10.13 ft | · | 71°F | 646 ft | Lower Wapsipinicon |
|
Cedar Creek Near Oakland Mills, Ia
11 hours ago · USGS 05473400 |
4,630 cfs | 15.55 ft | · | 71°F | 590 ft | Skunk |
|
Cedar Creek Near Bussey, Ia
11 hours ago · USGS 05489000 |
3,860 cfs | 13.35 ft | · | 72°F | 696 ft | Lower Des Moines |
|
Raccoon River At 63rd Street At Des Moines, Ia
11 hours ago · USGS 05484650 |
3,810 cfs | 23.76 ft | · | 71°F | 797 ft | North Raccoon |
|
South Skunk River At Colfax, Ia
10 hours ago · USGS 05471050 |
3,620 cfs | 13.96 ft | · | 71°F | 793 ft | South Skunk |
|
Wapsipinicon River Near Anamosa, Ia
11 hours ago · USGS 05421740 |
3,490 cfs | 9.32 ft | · | 70°F | 779 ft | Lower Wapsipinicon |
|
Iowa River At Iowa City, Ia
11 hours ago · USGS 05454500 |
3,420 cfs | 12.96 ft | · | 72°F | 643 ft | Lower Iowa |
|
Iowa River At Marengo, Ia
11 hours ago · USGS 05453100 |
3,350 cfs | 10.73 ft | · | 72°F | 729 ft | Middle Iowa |
|
North River Near Norwalk, Ia
16 hours ago · USGS 05486000 |
3,350 cfs | 19.46 ft | · | 71°F | 811 ft | Lake Red Rock |
|
Wapsipinicon River At Independence, Ia
11 hours ago · USGS 05421000 |
3,240 cfs | 7.30 ft | · | 69°F | 889 ft | Upper Wapsipinicon |
|
Iowa River Near Belle Plaine, Ia
11 hours ago · USGS 05452500 |
3,190 cfs | 10.76 ft | · | 72°F | 748 ft | Middle Iowa |
|
Iowa River Below Coralville Dam Nr Coralville, Ia
11 hours ago · USGS 05453520 |
3,110 cfs | 51.55 ft | · | 72°F | 669 ft | Middle Iowa |
|
Raccoon River At Van Meter, Ia
11 hours ago · USGS 05484500 |
3,110 cfs | 5.60 ft | 32°F | 70°F | 862 ft | North Raccoon |
|
Middle River Near Indianola, Ia
11 hours ago · USGS 05486490 |
3,100 cfs | 14.69 ft | · | 71°F | 794 ft | Lake Red Rock |
|
Iowa River At Marshalltown, Ia
11 hours ago · USGS 05451500 |
2,620 cfs | 13.09 ft | · | 72°F | 853 ft | Middle Iowa |
|
South Skunk River Below Squaw Creek Near Ames, Ia
11 hours ago · USGS 05471000 |
2,540 cfs | 15.46 ft | · | 70°F | 872 ft | South Skunk |
|
Maquoketa River Near Maquoketa, Ia
11 hours ago · USGS 05418500 |
2,490 cfs | 13.39 ft | · | 73°F | 646 ft | Maquoketa |
|
Nishnabotna River Above Hamburg, Ia
11 hours ago · USGS 06810000 |
2,380 cfs | 11.61 ft | · | 73°F | 904 ft | Nishnabotna |
|
Des Moines River Near Stratford, Ia
11 hours ago · USGS 05481300 |
2,190 cfs | 6.92 ft | · | 71°F | 902 ft | Middle Des Moines |
|
Cedar River At Janesville, Ia
10 hours ago · USGS 05458500 |
2,150 cfs | 2.92 ft | · | 69°F | 859 ft | Upper Cedar |
|
Turkey River At Garber, Ia
11 hours ago · USGS 05412500 |
1,810 cfs | 8.29 ft | 70°F | 73°F | 646 ft | Turkey |
|
Cedar River At Waverly, Ia
11 hours ago · USGS 05458300 |
1,580 cfs | 5.10 ft | 71°F | 69°F | 895 ft | Upper Cedar |
|
Shell Rock River At Shell Rock, Ia
10 hours ago · USGS 05462000 |
1,570 cfs | 8.84 ft | · | 69°F | 882 ft | Shell Rock |
|
East Nishnabotna River At Red Oak, Ia
11 hours ago · USGS 06809500 |
1,480 cfs | 9.06 ft | · | 72°F | 1,013 ft | East Nishnabotna |
|
South Skunk River Near Ames, Ia
11 hours ago · USGS 05470000 |
1,460 cfs | 6.83 ft | · | 73°F | 928 ft | South Skunk |
|
Big Creek Near Mt. Pleasant, Ia
10 hours ago · USGS 05473450 |
1,380 cfs | 9.54 ft | · | 71°F | 672 ft | Skunk |
|
Raccoon River Near West Des Moines, Ia
3 days ago · USGS 05484600 |
1,280 cfs | 30.47 ft | · | 71°F | 844 ft | North Raccoon |
|
Thompson River At Davis City, Ia
11 hours ago · USGS 06898000 |
1,270 cfs | 3.28 ft | · | 71°F | 910 ft | Thompson |
|
English River At Kalona, Ia
11 hours ago · USGS 05455500 |
1,170 cfs | 8.06 ft | · | 74°F | 655 ft | Lower Iowa |
|
West Fork Cedar River At Finchford, Ia
10 hours ago · USGS 05458900 |
1,100 cfs | 8.92 ft | · | 69°F | 859 ft | West Fork Cedar |
|
West Nishnabotna River At Randolph, Ia
10 hours ago · USGS 06808500 |
1,050 cfs | 9.52 ft | 76°F | 72°F | 956 ft | West Nishnabotna |
|
South River Near Ackworth, Ia
11 hours ago · USGS 05487470 |
989 cfs | 8.99 ft | · | 71°F | 805 ft | Lake Red Rock |
|
South Raccoon River At Redfield, Ia
11 hours ago · USGS 05484000 |
931 cfs | 3.97 ft | 32°F | 70°F | 917 ft | South Raccoon |
|
Nodaway River At Clarinda, Ia
11 hours ago · USGS 06817000 |
907 cfs | 11.65 ft | · | 73°F | 966 ft | West Nodaway |
|
North Skunk River Near Sigourney, Ia
11 hours ago · USGS 05472500 |
903 cfs | 7.71 ft | · | 73°F | 664 ft | North Skunk |
|
Volga River At Littleport, Ia
10 hours ago · USGS 05412400 |
874 cfs | 6.80 ft | · | 73°F | 694 ft | Turkey |
|
Beaver Creek Near Grimes, Ia
11 hours ago · USGS 05481950 |
846 cfs | 6.66 ft | · | 70°F | 829 ft | Middle Des Moines |
|
Black Hawk Creek At Hudson, Ia
11 hours ago · USGS 05463500 |
789 cfs | 9.90 ft | · | 70°F | 897 ft | Middle Cedar |
|
South Fork Iowa River Ne Of New Providence, Ia
10 hours ago · USGS 05451210 |
780 cfs | 6.24 ft | · | 69°F | 963 ft | Upper Iowa |
|
Turkey River Above French Hollow Cr At Elkader, Ia
10 hours ago · USGS 05412020 |
756 cfs | 6.21 ft | · | 72°F | 726 ft | Turkey |
|
Cedar River At Charles City, Ia
11 hours ago · USGS 05457700 |
732 cfs | 3.10 ft | · | 71°F | 977 ft | Upper Cedar |
|
Little Sioux River Near Turin, Ia
11 hours ago · USGS 06607500 |
717 cfs | 7.50 ft | · | 69°F | 1,029 ft | Little Sioux |
|
Squaw Creek At Ames, Ia
11 hours ago · USGS 05470500 |
706 cfs | 3.57 ft | · | 73°F | 907 ft | South Skunk |
|
Indian Creek Near Mingo, Ia
11 hours ago · USGS 05471200 |
634 cfs | 5.73 ft | · | 71°F | 827 ft | South Skunk |
|
Maquoketa River At Manchester, Ia
11 hours ago · USGS 05416900 |
622 cfs | 6.00 ft | · | 69°F | 920 ft | Maquoketa |
|
Wolf Creek Near Dysart, Ia
11 hours ago · USGS 05464220 |
621 cfs | 4.10 ft | · | 72°F | 835 ft | Middle Cedar |
|
Salt Creek Near Elberon, Ia
11 hours ago · USGS 05452000 |
585 cfs | 9.35 ft | · | 70°F | 802 ft | Middle Iowa |
|
Beaver Creek At New Hartford, Ia
11 hours ago · USGS 05463000 |
557 cfs | 4.48 ft | · | 69°F | 890 ft | Middle Cedar |
|
Boyer River At Logan, Ia
11 hours ago · USGS 06609500 |
546 cfs | 5.00 ft | · | 66°F | 1,014 ft | Boyer |
|
Upper Iowa River Near Dorchester, Ia
11 hours ago · USGS 05388250 |
545 cfs | 7.34 ft | · | 72°F | 668 ft | Upper Iowa |
|
Wapsipinicon River Near Tripoli, Ia
10 hours ago · USGS 05420680 |
534 cfs | 9.97 ft | · | 69°F | 1,019 ft | Upper Wapsipinicon |
|
Big Sioux River At Akron, Ia
11 hours ago · USGS 06485500 |
534 cfs | 5.03 ft | · | 62°F | 1,151 ft | Lower Big Sioux |
|
East Nishnabotna River Near Atlantic, Ia
11 hours ago · USGS 06809210 |
532 cfs | 4.06 ft | · | 72°F | 1,109 ft | East Nishnabotna |
|
Turkey River Near Eldorado, Ia
10 hours ago · USGS 05411850 |
505 cfs | 6.08 ft | · | 71°F | 897 ft | Turkey |
|
Boone River Near Webster City, Ia
11 hours ago · USGS 05481000 |
462 cfs | 3.03 ft | 35°F | 71°F | 1,028 ft | Boone |
|
Monona-Harrison Ditch Near Turin, Ia
11 hours ago · USGS 06602400 |
456 cfs | 5.89 ft | · | 69°F | 1,021 ft | Monona-Harrison Ditch |
|
North Fork Maquoketa River Near Fulton, Ia
11 hours ago · USGS 05418400 |
450 cfs | 3.56 ft | 39°F | 73°F | 689 ft | Maquoketa |
|
North Raccoon River Near Jefferson, Ia
11 hours ago · USGS 05482500 |
444 cfs | 5.52 ft | 37°F | 71°F | 978 ft | North Raccoon |
|
English Creek Near Knoxville, Ia
11 hours ago · USGS 05488200 |
441 cfs | 13.01 ft | · | 71°F | 749 ft | Lower Des Moines |
|
Des Moines River At Fort Dodge, Ia
11 hours ago · USGS 05480500 |
425 cfs | 3.92 ft | · | 70°F | 974 ft | Middle Des Moines |
|
Fourmile Creek At Des Moines, Ia
11 hours ago · USGS 05485640 |
408 cfs | 5.53 ft | · | 71°F | 813 ft | Lake Red Rock |
|
Soldier River At Pisgah, Ia
11 hours ago · USGS 06608500 |
374 cfs | 3.93 ft | · | 66°F | 1,047 ft | Blackbird-Soldier |
|
West Nishnabotna River At Hancock, Ia
10 hours ago · USGS 06807410 |
321 cfs | 2.92 ft | · | 71°F | 1,089 ft | West Nishnabotna |
|
Upper Iowa River At Decorah, Ia
11 hours ago · USGS 05387500 |
307 cfs | 2.01 ft | · | 71°F | 854 ft | Upper Iowa |
|
White Breast Creek Near Dallas, Ia
11 hours ago · USGS 05487980 |
302 cfs | 7.64 ft | · | 71°F | 773 ft | Lake Red Rock |
|
Fourmile Creek Near Ankeny, Ia
11 hours ago · USGS 05485605 |
301 cfs | 4.48 ft | · | 71°F | 911 ft | Lake Red Rock |
|
Upper Iowa River At Bluffton, Ia
11 hours ago · USGS 05387440 |
264 cfs | 3.55 ft | · | 71°F | 970 ft | Upper Iowa |
|
Little Sioux River At Correctionville, Ia
11 hours ago · USGS 06606600 |
242 cfs | 4.75 ft | · | 67°F | 1,106 ft | Little Sioux |
|
Maple River At Mapleton, Ia
11 hours ago · USGS 06607200 |
240 cfs | 4.98 ft | · | 68°F | 1,114 ft | Maple |
|
Walnut Creek At Des Moines, Ia
11 hours ago · USGS 05484800 |
212 cfs | 4.56 ft | · | 71°F | 808 ft | North Raccoon |
|
Middle Raccoon River At Panora, Ia
11 hours ago · USGS 05483600 |
211 cfs | 4.69 ft | 35°F | 69°F | 997 ft | South Raccoon |
|
Little Cedar River Near Ionia, Ia
10 hours ago · USGS 05458000 |
201 cfs | 4.18 ft | · | 71°F | 1,000 ft | Upper Cedar |
|
Des Moines River At Humboldt, Ia
10 hours ago · USGS 05476750 |
181 cfs | 3.18 ft | · | 66°F | 1,066 ft | Upper Des Moines |
|
Winnebago River At Mason City, Ia
11 hours ago · USGS 05459500 |
170 cfs | 5.10 ft | · | 70°F | 1,101 ft | Winnebago |
|
Old Mans Creek Near Iowa City, Ia
11 hours ago · USGS 05455100 |
162 cfs | 3.27 ft | 46°F | 71°F | 654 ft | Lower Iowa |
|
Floyd River At James, Ia
11 hours ago · USGS 06600500 |
153 cfs | 8.26 ft | · | 63°F | 1,117 ft | Floyd |
|
Clear Creek Near Coralville, Ia
11 hours ago · USGS 05454300 |
145 cfs | 2.30 ft | · | 71°F | 660 ft | Lower Iowa |
|
East Fork Des Moines River At Dakota City, Ia
2 days ago · USGS 05479000 |
137 cfs | 7.86 ft | · | 71°F | 1,043 ft | East Fork Des Moines |
|
Little Sioux River At Linn Grove, Ia
11 hours ago · USGS 06605850 |
135 cfs | 4.97 ft | · | 62°F | 1,249 ft | Little Sioux |
|
Big Bear Creek At Ladora, Ia
11 hours ago · USGS 05453000 |
122 cfs | 11.56 ft | · | 72°F | 771 ft | Middle Iowa |
|
Yellow River At Ion, Ia
10 hours ago · USGS 05389000 |
116 cfs | 5.73 ft | · | 72°F | 681 ft | Coon-Yellow |
|
Middle Raccoon River Near Bayard, Ia
11 hours ago · USGS 05483450 |
116 cfs | 9.55 ft | · | 69°F | 1,054 ft | South Raccoon |
|
Chariton River Near Moulton, Ia
10 hours ago · USGS 06904010 |
102 cfs | 19.28 ft | · | 71°F | 847 ft | Upper Chariton |
|
Turkey River At Spillville, Ia
11 hours ago · USGS 05411600 |
99 cfs | 2.34 ft | · | 71°F | 1,067 ft | Turkey |
|
South Fork Chariton River Near Promise City, Ia
10 hours ago · USGS 06903700 |
91 cfs | 3.91 ft | · | 71°F | 922 ft | Upper Chariton |
|
Rock River Near Rock Valley, Ia
11 hours ago · USGS 06483500 |
82 cfs | 4.24 ft | · | 61°F | 1,238 ft | Rock |
|
Chariton River Near Chariton, Ia
10 hours ago · USGS 06903400 |
79 cfs | 6.42 ft | · | 71°F | 968 ft | Upper Chariton |
|
Clear Creek Near Oxford, Ia
10 hours ago · USGS 05454220 |
76 cfs | 3.16 ft | · | 71°F | 722 ft | Lower Iowa |
|
Timber Creek Near Marshalltown, Ia
11 hours ago · USGS 05451700 |
70 cfs | 2.82 ft | · | 72°F | 862 ft | Middle Iowa |
|
North Raccoon River Near Sac City, Ia
11 hours ago · USGS 05482300 |
61 cfs | 6.91 ft | 75°F | 68°F | 1,179 ft | North Raccoon |
|
Iowa River Near Rowan, Ia
11 hours ago · USGS 05449500 |
60 cfs | 3.71 ft | · | 70°F | 1,187 ft | Upper Iowa |
|
Rapid Creek Near Iowa City, Ia
11 hours ago · USGS 05454000 |
42 cfs | 4.69 ft | · | 72°F | 688 ft | Lower Iowa |
|
Ocheyedan River Near Spencer, Ia
10 hours ago · USGS 06605000 |
31 cfs | 1.82 ft | · | 63°F | 1,317 ft | Little Sioux |
|
Chariton River Near Rathbun, Ia
11 hours ago · USGS 06903900 |
29 cfs | 2.42 ft | · | 72°F | 855 ft | Upper Chariton |
|
Walnut Creek Near Hartwick, Ia
11 hours ago · USGS 05452200 |
28 cfs | 1.40 ft | · | 69°F | 806 ft | Middle Iowa |
|
Floyd River At Alton, Ia
11 hours ago · USGS 06600100 |
27 cfs | 5.35 ft | · | 62°F | 1,289 ft | Floyd |
|
Richland Creek Near Haven, Ia
11 hours ago · USGS 05451900 |
15 cfs | 10.50 ft | · | 69°F | 817 ft | Middle Iowa |
|
Rock River Below Tom Creek At Rock Rapids, Ia
11 hours ago · USGS 06483290 |
15 cfs | 6.52 ft | · | 60°F | 1,316 ft | Rock |
|
East Fork 102 River At Bedford, Ia
10 hours ago · USGS 06819185 |
5 cfs | 10.74 ft | · | 73°F | 1,084 ft | One Hundred And Two |
|
Bloody Run Creek Near Marquette, Ia
2 days ago · USGS 05389400 |
0 cfs | 3.47 ft | · | 67°F | 634 ft | Coon-Yellow |
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Flow report FAQ
About Iowa streamflow
What are river levels like in Iowa right now?
As of August 16, 2026, Iowa rivers are running at 286% of normal across 117 USGS streamgauges, and the Mississippi River At Clinton is reporting the highest discharge at 30,500 cfs. The full sortable gauge table is below.
Which Iowa river is running highest right now?
As of August 16, 2026, the highest discharge in Iowa is 30,500 cfs on the Mississippi River At Clinton. See the sortable gauge table for the full statewide ranking.
Are Iowa rivers high or low right now?
Compare the statewide percent-of-normal on this page: above 100% means Iowa 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 Iowa 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 Iowa 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 Iowa 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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