Iowa River Levels & Streamflow
As of Sep 2, 2026, Iowa rivers are running at 85% of normal across 117 USGS gauges — the highest is 32,400 cfs on the Mississippi River At Clinton. Live discharge, gauge height, and percent-of-normal for every USGS streamgauge in Iowa.
Streamflow levels across Iowa are currently 85% of normal, with the Mississippi River At Clinton reporting the highest discharge in the state at 32,400 cfs and a gauge stage of 9.18 ft.
Meanwhile, the Mississippi River At Clinton is seeing a spike today — up 6% 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.
Active weather warnings for Iowa
Iowa is currently experiencing a dangerous heat event affecting multiple regions across the state. Heat Advisories are in effect through Thursday evening, September 3rd at 7:00 PM CDT, with heat index values reaching 102-103°F across central, south-central, northeast, and southwest Iowa, including the Des Moines metro area. An Extreme Heat Warning has been issued for southeast Iowa through Friday evening, with heat indices potentially reaching 105°F. The primary concern is the prolonged duration of excessive heat combined with minimal overnight relief, with warm lows between 75-80°F, creating cumulative heat stress. Residents throughout affected areas should take precautions against heat-related illnesses, stay hydrated, limit outdoor activities during peak heat hours, and check on vulnerable populations. The National Weather Service indicates these warnings may be extended as the heatwave continues.
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
100% is the historical norm. Below 70% indicates drought; above 130% can flag elevated flood risk.
Highest discharge
Gauge stage 9.18 ft
Biggest 24h spike
Now 32,400 cfs
Network coverage
USGS gauges feeding 0 named rivers in Iowa.
Where every gauge actually sits
One dot per Iowa streamgauge, placed by its own percent of normal. The state average is a single line through all of it.
Percent of normal compares today's discharge with the historical average for this calendar day. Tap any dot to open that gauge.
Iowa streamflow, three water years
Statewide percent of normal, every day since Aug 2023. The dotted line is normal.
799 daily readings from 117 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 250%: 32 readings above that — including the 364% 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.
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
12 hours ago · USGS 05420500 |
27,900 cfs | 9.05 ft | 79°F | 73°F | 593 ft | Copperas-Duck |
|
Iowa River At Wapello, Ia
12 hours ago · USGS 05465500 |
5,640 cfs | 12.90 ft | 49°F | 74°F | 554 ft | Lower Iowa |
|
Cedar River Near Conesville, Ia
12 hours ago · USGS 05465000 |
4,130 cfs | 6.97 ft | · | 73°F | 593 ft | Lower Cedar |
|
Cedar River At Cedar Rapids, Ia
12 hours ago · USGS 05464500 |
3,050 cfs | 4.21 ft | 62°F | 73°F | 712 ft | Middle Cedar |
|
Cedar River At Waterloo, Ia
12 hours ago · USGS 05464000 |
2,170 cfs | 6.02 ft | · | 71°F | 823 ft | Middle Cedar |
|
Des Moines River Near Tracy, Ia
13 hours ago · USGS 05488500 |
1,790 cfs | 3.02 ft | · | 75°F | 676 ft | Lower Des Moines |
|
Cedar River At Cedar Falls, Ia
12 hours ago · USGS 05463050 |
1,780 cfs | 78.70 ft | · | 71°F | 853 ft | Middle Cedar |
|
Des Moines River At Keosauqua, Ia
13 hours ago · USGS 05490500 |
1,740 cfs | 10.60 ft | 82°F | 75°F | 579 ft | Lower Des Moines |
|
Des Moines River At Ottumwa, Ia
12 hours ago · USGS 05489500 |
1,440 cfs | 1.77 ft | 82°F | 76°F | 635 ft | Lower Des Moines |
|
Iowa River Near Lone Tree, Ia
12 hours ago · USGS 05455700 |
1,370 cfs | 5.53 ft | · | 73°F | 601 ft | Lower Iowa |
|
Des Moines River Near Pella, Ia
13 hours ago · USGS 05488110 |
1,360 cfs | 83.93 ft | 77°F | 76°F | 689 ft | Lower Des Moines |
|
Wapsipinicon River Near De Witt, Ia
12 hours ago · USGS 05422000 |
1,150 cfs | 6.55 ft | · | 73°F | 646 ft | Lower Wapsipinicon |
|
Iowa River Below Coralville Dam Nr Coralville, Ia
12 hours ago · USGS 05453520 |
1,110 cfs | 49.95 ft | · | 75°F | 669 ft | Middle Iowa |
|
Iowa River At Iowa City, Ia
12 hours ago · USGS 05454500 |
1,060 cfs | 10.53 ft | · | 73°F | 643 ft | Lower Iowa |
|
Maquoketa River Near Maquoketa, Ia
13 hours ago · USGS 05418500 |
1,030 cfs | 11.28 ft | · | 72°F | 646 ft | Maquoketa |
|
Skunk River At Augusta, Ia
12 hours ago · USGS 05474000 |
996 cfs | 2.50 ft | · | 75°F | 553 ft | Skunk |
|
Iowa River At Marengo, Ia
12 hours ago · USGS 05453100 |
891 cfs | 7.16 ft | · | 73°F | 729 ft | Middle Iowa |
|
Des Moines River Blw Raccoon Riv At Des Moines, Ia
13 hours ago · USGS 05485500 |
871 cfs | 9.20 ft | · | 79°F | 779 ft | Lake Red Rock |
|
Wapsipinicon River Near Anamosa, Ia
13 hours ago · USGS 05421740 |
816 cfs | 5.57 ft | · | 73°F | 779 ft | Lower Wapsipinicon |
|
Iowa River Near Belle Plaine, Ia
12 hours ago · USGS 05452500 |
791 cfs | 6.77 ft | · | 73°F | 748 ft | Middle Iowa |
|
Cedar River At Janesville, Ia
12 hours ago · USGS 05458500 |
770 cfs | 1.63 ft | · | 74°F | 859 ft | Upper Cedar |
|
Shell Rock River At Shell Rock, Ia
12 hours ago · USGS 05462000 |
705 cfs | 8.11 ft | · | 70°F | 882 ft | Shell Rock |
|
Nishnabotna River Above Hamburg, Ia
12 hours ago · USGS 06810000 |
653 cfs | 8.18 ft | · | 76°F | 904 ft | Nishnabotna |
|
South Skunk River Near Oskaloosa, Ia
12 hours ago · USGS 05471500 |
648 cfs | 9.38 ft | · | 77°F | 692 ft | South Skunk |
|
Cedar River At Waverly, Ia
13 hours ago · USGS 05458300 |
539 cfs | 4.97 ft | 75°F | 70°F | 895 ft | Upper Cedar |
|
Turkey River At Garber, Ia
13 hours ago · USGS 05412500 |
501 cfs | 6.57 ft | 75°F | 74°F | 646 ft | Turkey |
|
Des Moines River At 2nd Avenue, Ia
13 hours ago · USGS 05482000 |
484 cfs | 14.96 ft | 32°F | 79°F | 808 ft | Middle Des Moines |
|
Des Moines River Near Stratford, Ia
13 hours ago · USGS 05481300 |
428 cfs | 5.06 ft | · | 70°F | 902 ft | Middle Des Moines |
|
Turkey River Above French Hollow Cr At Elkader, Ia
12 hours ago · USGS 05412020 |
401 cfs | 5.51 ft | · | 71°F | 726 ft | Turkey |
|
Des Moines River Near Saylorville, Ia
13 hours ago · USGS 05481650 |
377 cfs | 2.11 ft | · | 78°F | 819 ft | Middle Des Moines |
|
Raccoon River At 63rd Street At Des Moines, Ia
13 hours ago · USGS 05484650 |
366 cfs | 20.11 ft | · | 79°F | 797 ft | North Raccoon |
|
Cedar River At Charles City, Ia
12 hours ago · USGS 05457700 |
361 cfs | 2.44 ft | · | 69°F | 977 ft | Upper Cedar |
|
Big Sioux River At Akron, Ia
12 hours ago · USGS 06485500 |
358 cfs | 4.45 ft | · | 67°F | 1,151 ft | Lower Big Sioux |
|
Wapsipinicon River At Independence, Ia
12 hours ago · USGS 05421000 |
340 cfs | 5.04 ft | · | 71°F | 889 ft | Upper Wapsipinicon |
|
North Fork Maquoketa River Near Fulton, Ia
13 hours ago · USGS 05418400 |
327 cfs | 3.12 ft | 39°F | 72°F | 689 ft | Maquoketa |
|
Raccoon River At Van Meter, Ia
13 hours ago · USGS 05484500 |
314 cfs | 2.49 ft | 32°F | 78°F | 862 ft | North Raccoon |
|
Raccoon River Near West Des Moines, Ia
12 hours ago · USGS 05484600 |
311 cfs | 26.24 ft | · | 79°F | 844 ft | North Raccoon |
|
Little Sioux River Near Turin, Ia
12 hours ago · USGS 06607500 |
309 cfs | 6.55 ft | · | 72°F | 1,029 ft | Little Sioux |
|
West Nishnabotna River At Randolph, Ia
12 hours ago · USGS 06808500 |
281 cfs | 7.93 ft | 80°F | 80°F | 956 ft | West Nishnabotna |
|
Raccoon River At Fleur Drive, Ia
12 hours ago · USGS 05484900 |
270 cfs | · | · | 79°F | 797 ft | North Raccoon |
|
Iowa River At Marshalltown, Ia
12 hours ago · USGS 05451500 |
260 cfs | 9.88 ft | · | 73°F | 853 ft | Middle Iowa |
|
Turkey River Near Eldorado, Ia
12 hours ago · USGS 05411850 |
231 cfs | 5.38 ft | · | 69°F | 897 ft | Turkey |
|
West Fork Cedar River At Finchford, Ia
12 hours ago · USGS 05458900 |
230 cfs | 6.61 ft | · | 74°F | 859 ft | West Fork Cedar |
|
South Skunk River At Colfax, Ia
12 hours ago · USGS 05471050 |
219 cfs | 8.07 ft | · | 75°F | 793 ft | South Skunk |
|
Des Moines River At Fort Dodge, Ia
13 hours ago · USGS 05480500 |
189 cfs | 3.49 ft | · | 69°F | 974 ft | Middle Des Moines |
|
Upper Iowa River At Bluffton, Ia
12 hours ago · USGS 05387440 |
179 cfs | 3.31 ft | · | 69°F | 970 ft | Upper Iowa |
|
Upper Iowa River At Decorah, Ia
12 hours ago · USGS 05387500 |
177 cfs | 1.79 ft | · | 69°F | 854 ft | Upper Iowa |
|
Maquoketa River At Manchester, Ia
13 hours ago · USGS 05416900 |
167 cfs | 4.20 ft | · | 72°F | 920 ft | Maquoketa |
|
East Nishnabotna River At Red Oak, Ia
12 hours ago · USGS 06809500 |
167 cfs | 5.81 ft | · | 80°F | 1,013 ft | East Nishnabotna |
|
Volga River At Littleport, Ia
12 hours ago · USGS 05412400 |
163 cfs | 4.75 ft | · | 74°F | 694 ft | Turkey |
|
South Skunk River Below Squaw Creek Near Ames, Ia
12 hours ago · USGS 05471000 |
161 cfs | 10.54 ft | · | 72°F | 872 ft | South Skunk |
|
Boyer River At Logan, Ia
12 hours ago · USGS 06609500 |
134 cfs | 3.47 ft | · | 73°F | 1,014 ft | Boyer |
|
Wolf Creek Near Dysart, Ia
13 hours ago · USGS 05464220 |
124 cfs | 2.80 ft | · | 71°F | 835 ft | Middle Cedar |
|
North Skunk River Near Sigourney, Ia
12 hours ago · USGS 05472500 |
120 cfs | 4.05 ft | · | 73°F | 664 ft | North Skunk |
|
Black Hawk Creek At Hudson, Ia
12 hours ago · USGS 05463500 |
120 cfs | 5.83 ft | · | 74°F | 897 ft | Middle Cedar |
|
North River Near Norwalk, Ia
13 hours ago · USGS 05486000 |
116 cfs | 6.48 ft | · | 79°F | 811 ft | Lake Red Rock |
|
Middle River Near Indianola, Ia
13 hours ago · USGS 05486490 |
109 cfs | 7.47 ft | · | 77°F | 794 ft | Lake Red Rock |
|
South Skunk River Near Ames, Ia
12 hours ago · USGS 05470000 |
106 cfs | 3.17 ft | · | 72°F | 928 ft | South Skunk |
|
South Raccoon River At Redfield, Ia
12 hours ago · USGS 05484000 |
106 cfs | 2.29 ft | 32°F | 77°F | 917 ft | South Raccoon |
|
Squaw Creek At Ames, Ia
12 hours ago · USGS 05470500 |
104 cfs | 1.68 ft | · | 72°F | 907 ft | South Skunk |
|
Salt Creek Near Elberon, Ia
12 hours ago · USGS 05452000 |
103 cfs | 6.21 ft | · | 73°F | 802 ft | Middle Iowa |
|
Beaver Creek At New Hartford, Ia
12 hours ago · USGS 05463000 |
100 cfs | 1.92 ft | · | 74°F | 890 ft | Middle Cedar |
|
West Nishnabotna River At Hancock, Ia
12 hours ago · USGS 06807410 |
97 cfs | 1.82 ft | · | 73°F | 1,089 ft | West Nishnabotna |
|
Yellow River At Ion, Ia
12 hours ago · USGS 05389000 |
93 cfs | 5.58 ft | · | 70°F | 681 ft | Coon-Yellow |
|
Little Sioux River At Correctionville, Ia
12 hours ago · USGS 06606600 |
91 cfs | 4.42 ft | · | 70°F | 1,106 ft | Little Sioux |
|
Winnebago River At Mason City, Ia
12 hours ago · USGS 05459500 |
87 cfs | 4.65 ft | · | 66°F | 1,101 ft | Winnebago |
|
Little Sioux River At Linn Grove, Ia
12 hours ago · USGS 06605850 |
85 cfs | 4.54 ft | · | 67°F | 1,249 ft | Little Sioux |
|
Floyd River At James, Ia
12 hours ago · USGS 06600500 |
84 cfs | 7.88 ft | · | 69°F | 1,117 ft | Floyd |
|
Maple River At Mapleton, Ia
12 hours ago · USGS 06607200 |
83 cfs | 4.27 ft | · | 71°F | 1,114 ft | Maple |
|
Little Cedar River Near Ionia, Ia
12 hours ago · USGS 05458000 |
80 cfs | 3.45 ft | · | 69°F | 1,000 ft | Upper Cedar |
|
Des Moines River At Humboldt, Ia
12 hours ago · USGS 05476750 |
80 cfs | 2.81 ft | · | 71°F | 1,066 ft | Upper Des Moines |
|
Rock River Near Rock Valley, Ia
12 hours ago · USGS 06483500 |
79 cfs | 4.22 ft | · | 66°F | 1,238 ft | Rock |
|
Wapsipinicon River Near Tripoli, Ia
12 hours ago · USGS 05420680 |
77 cfs | 7.24 ft | · | 69°F | 1,019 ft | Upper Wapsipinicon |
|
East Nishnabotna River Near Atlantic, Ia
12 hours ago · USGS 06809210 |
77 cfs | 2.47 ft | · | 76°F | 1,109 ft | East Nishnabotna |
|
English River At Kalona, Ia
12 hours ago · USGS 05455500 |
73 cfs | 3.80 ft | · | 73°F | 655 ft | Lower Iowa |
|
Indian Creek Near Mingo, Ia
13 hours ago · USGS 05471200 |
73 cfs | 3.39 ft | · | 77°F | 827 ft | South Skunk |
|
Soldier River At Pisgah, Ia
12 hours ago · USGS 06608500 |
63 cfs | 2.61 ft | · | 75°F | 1,047 ft | Blackbird-Soldier |
|
Fourmile Creek At Des Moines, Ia
12 hours ago · USGS 05485640 |
62 cfs | 3.85 ft | · | 78°F | 813 ft | Lake Red Rock |
|
South Fork Iowa River Ne Of New Providence, Ia
12 hours ago · USGS 05451210 |
59 cfs | 2.43 ft | · | 74°F | 963 ft | Upper Iowa |
|
Beaver Creek Near Grimes, Ia
13 hours ago · USGS 05481950 |
58 cfs | 3.12 ft | · | 78°F | 829 ft | Middle Des Moines |
|
Nodaway River At Clarinda, Ia
13 hours ago · USGS 06817000 |
57 cfs | 10.56 ft | · | 80°F | 966 ft | West Nodaway |
|
Rock River Below Tom Creek At Rock Rapids, Ia
13 hours ago · USGS 06483290 |
57 cfs | 7.04 ft | · | 65°F | 1,316 ft | Rock |
|
Monona-Harrison Ditch Near Turin, Ia
12 hours ago · USGS 06602400 |
55 cfs | 4.54 ft | · | 72°F | 1,021 ft | Monona-Harrison Ditch |
|
Boone River Near Webster City, Ia
13 hours ago · USGS 05481000 |
53 cfs | 1.83 ft | 35°F | 73°F | 1,028 ft | Boone |
|
Thompson River At Davis City, Ia
13 hours ago · USGS 06898000 |
51 cfs | · | · | 74°F | 910 ft | Thompson |
|
North Raccoon River Near Jefferson, Ia
13 hours ago · USGS 05482500 |
50 cfs | 4.70 ft | 37°F | 75°F | 978 ft | North Raccoon |
|
East Fork Des Moines River At Dakota City, Ia
13 hours ago · USGS 05479000 |
42 cfs | 7.45 ft | · | 71°F | 1,043 ft | East Fork Des Moines |
|
Middle Raccoon River At Panora, Ia
13 hours ago · USGS 05483600 |
41 cfs | 4.06 ft | 35°F | 73°F | 997 ft | South Raccoon |
|
Fourmile Creek Near Ankeny, Ia
13 hours ago · USGS 05485605 |
41 cfs | 2.12 ft | · | 75°F | 911 ft | Lake Red Rock |
|
Old Mans Creek Near Iowa City, Ia
12 hours ago · USGS 05455100 |
39 cfs | 1.76 ft | 46°F | 73°F | 654 ft | Lower Iowa |
|
Turkey River At Spillville, Ia
12 hours ago · USGS 05411600 |
39 cfs | 2.03 ft | · | 69°F | 1,067 ft | Turkey |
|
Iowa River Near Rowan, Ia
12 hours ago · USGS 05449500 |
36 cfs | 3.50 ft | · | 72°F | 1,187 ft | Upper Iowa |
|
Cedar Creek Near Oakland Mills, Ia
12 hours ago · USGS 05473400 |
35 cfs | 3.06 ft | · | 73°F | 590 ft | Skunk |
|
Big Bear Creek At Ladora, Ia
12 hours ago · USGS 05453000 |
29 cfs | 10.72 ft | · | 76°F | 771 ft | Middle Iowa |
|
Middle Raccoon River Near Bayard, Ia
13 hours ago · USGS 05483450 |
28 cfs | 8.75 ft | · | 76°F | 1,054 ft | South Raccoon |
|
North Raccoon River Near Sac City, Ia
13 hours ago · USGS 05482300 |
26 cfs | 6.55 ft | 75°F | 72°F | 1,179 ft | North Raccoon |
|
South River Near Ackworth, Ia
13 hours ago · USGS 05487470 |
26 cfs | 4.83 ft | · | 77°F | 805 ft | Lake Red Rock |
|
Floyd River At Alton, Ia
12 hours ago · USGS 06600100 |
21 cfs | 5.28 ft | · | 67°F | 1,289 ft | Floyd |
|
Upper Iowa River Near Dorchester, Ia
13 hours ago · USGS 05388250 |
21 cfs | 6.21 ft | · | 69°F | 668 ft | Upper Iowa |
|
Timber Creek Near Marshalltown, Ia
12 hours ago · USGS 05451700 |
20 cfs | 2.03 ft | · | 73°F | 862 ft | Middle Iowa |
|
Cedar Creek Near Bussey, Ia
13 hours ago · USGS 05489000 |
20 cfs | 4.54 ft | · | 78°F | 696 ft | Lower Des Moines |
|
Chariton River Near Moulton, Ia
12 hours ago · USGS 06904010 |
18 cfs | 18.23 ft | · | 75°F | 847 ft | Upper Chariton |
|
Ocheyedan River Near Spencer, Ia
12 hours ago · USGS 06605000 |
17 cfs | 1.60 ft | · | 67°F | 1,317 ft | Little Sioux |
|
Chariton River Near Rathbun, Ia
12 hours ago · USGS 06903900 |
16 cfs | 2.29 ft | · | 75°F | 855 ft | Upper Chariton |
|
Bloody Run Creek Near Marquette, Ia
12 hours ago · USGS 05389400 |
14 cfs | 4.07 ft | · | 70°F | 634 ft | Coon-Yellow |
|
Clear Creek Near Coralville, Ia
12 hours ago · USGS 05454300 |
13 cfs | · | · | 76°F | 660 ft | Lower Iowa |
|
White Breast Creek Near Dallas, Ia
13 hours ago · USGS 05487980 |
12 cfs | 6.03 ft | · | 76°F | 773 ft | Lake Red Rock |
|
Walnut Creek At Des Moines, Ia
12 hours ago · USGS 05484800 |
9 cfs | 3.35 ft | · | 79°F | 808 ft | North Raccoon |
|
Walnut Creek Near Hartwick, Ia
12 hours ago · USGS 05452200 |
8 cfs | · | · | 74°F | 806 ft | Middle Iowa |
|
Clear Creek Near Oxford, Ia
12 hours ago · USGS 05454220 |
7 cfs | 1.59 ft | · | 73°F | 722 ft | Lower Iowa |
|
Richland Creek Near Haven, Ia
12 hours ago · USGS 05451900 |
5 cfs | 10.19 ft | · | 74°F | 817 ft | Middle Iowa |
|
Big Creek Near Mt. Pleasant, Ia
12 hours ago · USGS 05473450 |
5 cfs | 3.24 ft | · | 73°F | 672 ft | Skunk |
|
South Fork Chariton River Near Promise City, Ia
12 hours ago · USGS 06903700 |
5 cfs | 3.01 ft | · | 75°F | 922 ft | Upper Chariton |
|
Chariton River Near Chariton, Ia
12 hours ago · USGS 06903400 |
4 cfs | 4.18 ft | · | 75°F | 968 ft | Upper Chariton |
|
Rapid Creek Near Iowa City, Ia
13 hours ago · USGS 05454000 |
4 cfs | 3.80 ft | · | 75°F | 688 ft | Lower Iowa |
|
English Creek Near Knoxville, Ia
13 hours ago · USGS 05488200 |
3 cfs | 7.97 ft | · | 79°F | 749 ft | Lower Des Moines |
|
East Fork 102 River At Bedford, Ia
12 hours ago · USGS 06819185 |
1 cfs | 10.66 ft | · | 75°F | 1,084 ft | One Hundred And Two |
See every Iowa gauge ranked against normal.
- Percentile rank & % of median for all 117 gauges
- 15-day PULSE forecast on every gauge
- Custom flow alerts & full daily history
About Iowa streamflow
What are river levels like in Iowa right now?
As of September 2, 2026, Iowa rivers are running at 85% of normal across 117 USGS streamgauges, and the Mississippi River At Clinton is reporting the highest discharge at 32,400 cfs. The full sortable gauge table is below.
Which Iowa river is running highest right now?
As of September 2, 2026, the highest discharge in Iowa is 32,400 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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