Flow report
Iowa streamflow
Live discharge, gauge height, water temperature, and percent-of-normal readings from every USGS streamgauge in Iowa. Built for paddlers, anglers, water managers, and flood researchers.
USGS gauges
117
State percent normal
97%
Paddle runs
0
Updated
Jul 20
Open the Iowa flow layer on the map
Every USGS streamgauge filtered to Iowa.
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July
20
2026
Flow briefing
Streamflow levels across Iowa are currently 97% of normal, with the Mississippi River At Clinton reporting the highest discharge in the state at 48,000 cfs and a gauge stage of 9.84 ft.
Meanwhile, the Volga River At Littleport is seeing a spike today — up 36% 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 Natural Disaster Report
Iowa faces dangerous heat conditions across the entire state on July 20th, with multiple heat advisories and an Extreme Heat Warning in effect. Northwest and west central Iowa, including areas near Sioux City, will experience the most severe conditions with heat index values reaching 107°F under the Extreme Heat Warning, while southwest Iowa near Council Bluffs could see indices of 105-110°F. Most of Iowa, including Des Moines, Cedar Rapids, and the Quad Cities region, will experience heat indices between 100-105°F from noon through 8:00 PM CDT. Additionally, an Air Quality Alert remains active for eastern Iowa through Monday morning due to smoke affecting cities like Dubuque, Iowa City, and Davenport. Residents should limit outdoor activities, stay hydrated, and watch vulnerable populations for signs of heat-related illness. Scattered thunderstorms may provide temporary relief in areas north of I-80 this morning.
Iowa faces dangerous heat conditions across the entire state on July 20th, with multiple heat advisories and an Extreme Heat Warning in effect. Northwest and west central Iowa, including areas near Sioux City, will experience the most severe conditions with heat index values reaching 107°F under the Extreme Heat Warning, while southwest Iowa near Council Bluffs could see indices of 105-110°F. Most of Iowa, including Des Moines, Cedar Rapids, and the Quad Cities region, will experience heat indices between 100-105°F from noon through 8:00 PM CDT. Additionally, an Air Quality Alert remains active for eastern Iowa through Monday morning due to smoke affecting cities like Dubuque, Iowa City, and Davenport. Residents should limit outdoor activities, stay hydrated, and watch vulnerable populations for signs of heat-related illness. Scattered thunderstorms may provide temporary relief in areas north of I-80 this morning.
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
97%
100% is the historical norm. Below 70% indicates drought; above 130% can flag elevated flood risk.
Highest discharge
Mississippi River At Clinton
48,000 cfs
Gauge stage 9.84 ft
Biggest 24h spike
Volga River At Littleport
+36%
Now 304 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
6 hours ago · USGS 05420500 |
49,600 cfs | 9.71 ft | 85°F | 64°F | 593 ft | Copperas-Duck |
|
Iowa River At Wapello, Ia
6 hours ago · USGS 05465500 |
14,000 cfs | 16.00 ft | 49°F | 66°F | 554 ft | Lower Iowa |
|
Cedar River Near Conesville, Ia
6 hours ago · USGS 05465000 |
9,920 cfs | 9.49 ft | · | 67°F | 593 ft | Lower Cedar |
|
Cedar River At Cedar Rapids, Ia
6 hours ago · USGS 05464500 |
8,290 cfs | 5.84 ft | 62°F | 67°F | 712 ft | Middle Cedar |
|
Des Moines River At Keosauqua, Ia
6 hours ago · USGS 05490500 |
5,400 cfs | 12.05 ft | 87°F | 69°F | 579 ft | Lower Des Moines |
|
Cedar River At Waterloo, Ia
6 hours ago · USGS 05464000 |
4,690 cfs | 6.87 ft | · | 69°F | 823 ft | Middle Cedar |
|
Des Moines River At Ottumwa, Ia
6 hours ago · USGS 05489500 |
4,540 cfs | 2.98 ft | 87°F | 69°F | 635 ft | Lower Des Moines |
|
Cedar River At Cedar Falls, Ia
6 hours ago · USGS 05463050 |
4,340 cfs | 78.70 ft | · | 67°F | 853 ft | Middle Cedar |
|
Skunk River At Augusta, Ia
6 hours ago · USGS 05474000 |
4,280 cfs | 5.41 ft | · | 67°F | 553 ft | Skunk |
|
Des Moines River Near Tracy, Ia
6 hours ago · USGS 05488500 |
4,200 cfs | 4.00 ft | · | 69°F | 676 ft | Lower Des Moines |
|
Des Moines River Near Pella, Ia
6 hours ago · USGS 05488110 |
3,500 cfs | 85.71 ft | 83°F | 69°F | 689 ft | Lower Des Moines |
|
Iowa River Near Lone Tree, Ia
6 hours ago · USGS 05455700 |
3,480 cfs | 7.76 ft | · | 67°F | 601 ft | Lower Iowa |
|
Des Moines River Blw Raccoon Riv At Des Moines, Ia
6 hours ago · USGS 05485500 |
3,130 cfs | 11.26 ft | · | 73°F | 779 ft | Lake Red Rock |
|
Wapsipinicon River Near De Witt, Ia
6 hours ago · USGS 05422000 |
2,540 cfs | 8.31 ft | · | 65°F | 646 ft | Lower Wapsipinicon |
|
Iowa River At Iowa City, Ia
6 hours ago · USGS 05454500 |
2,490 cfs | 12.05 ft | · | 70°F | 643 ft | Lower Iowa |
|
Iowa River Below Coralville Dam Nr Coralville, Ia
6 hours ago · USGS 05453520 |
2,480 cfs | 51.08 ft | · | 67°F | 669 ft | Middle Iowa |
|
Des Moines River At 2nd Avenue, Ia
6 hours ago · USGS 05482000 |
2,340 cfs | 14.07 ft | 32°F | 73°F | 808 ft | Middle Des Moines |
|
Iowa River At Marengo, Ia
6 hours ago · USGS 05453100 |
2,260 cfs | 9.08 ft | · | 70°F | 729 ft | Middle Iowa |
|
South Skunk River Near Oskaloosa, Ia
6 hours ago · USGS 05471500 |
2,150 cfs | 11.91 ft | · | 68°F | 692 ft | South Skunk |
|
Iowa River Near Belle Plaine, Ia
6 hours ago · USGS 05452500 |
2,060 cfs | 9.02 ft | · | 70°F | 748 ft | Middle Iowa |
|
Des Moines River Near Saylorville, Ia
6 hours ago · USGS 05481650 |
1,890 cfs | 4.04 ft | · | 70°F | 819 ft | Middle Des Moines |
|
Cedar River At Janesville, Ia
6 hours ago · USGS 05458500 |
1,790 cfs | 2.61 ft | · | 66°F | 859 ft | Upper Cedar |
|
Wapsipinicon River Near Anamosa, Ia
6 hours ago · USGS 05421740 |
1,670 cfs | 6.78 ft | · | 65°F | 779 ft | Lower Wapsipinicon |
|
Cedar River At Waverly, Ia
6 hours ago · USGS 05458300 |
1,480 cfs | 5.05 ft | 79°F | 66°F | 895 ft | Upper Cedar |
|
Des Moines River Near Stratford, Ia
6 hours ago · USGS 05481300 |
1,390 cfs | 6.14 ft | · | 71°F | 902 ft | Middle Des Moines |
|
Maquoketa River Near Maquoketa, Ia
6 hours ago · USGS 05418500 |
1,360 cfs | 11.85 ft | · | 64°F | 646 ft | Maquoketa |
|
Big Sioux River At Akron, Ia
6 hours ago · USGS 06485500 |
1,360 cfs | 6.70 ft | · | 75°F | 1,151 ft | Lower Big Sioux |
|
Shell Rock River At Shell Rock, Ia
6 hours ago · USGS 05462000 |
1,320 cfs | 8.65 ft | · | 66°F | 882 ft | Shell Rock |
|
Des Moines River At Fort Dodge, Ia
6 hours ago · USGS 05480500 |
1,170 cfs | 4.43 ft | · | 71°F | 974 ft | Middle Des Moines |
|
Nishnabotna River Above Hamburg, Ia
6 hours ago · USGS 06810000 |
1,060 cfs | 9.21 ft | · | 78°F | 904 ft | Nishnabotna |
|
Upper Iowa River Near Dorchester, Ia
6 hours ago · USGS 05388250 |
991 cfs | 8.01 ft | · | 66°F | 668 ft | Upper Iowa |
|
Little Sioux River Near Turin, Ia
6 hours ago · USGS 06607500 |
956 cfs | 7.94 ft | · | 78°F | 1,029 ft | Little Sioux |
|
Raccoon River Near West Des Moines, Ia
6 hours ago · USGS 05484600 |
954 cfs | 27.36 ft | · | 73°F | 844 ft | North Raccoon |
|
Turkey River At Garber, Ia
6 hours ago · USGS 05412500 |
953 cfs | 7.28 ft | 78°F | 66°F | 646 ft | Turkey |
|
Iowa River At Marshalltown, Ia
6 hours ago · USGS 05451500 |
865 cfs | 11.12 ft | · | 67°F | 853 ft | Middle Iowa |
|
Raccoon River At 63rd Street At Des Moines, Ia
6 hours ago · USGS 05484650 |
834 cfs | 21.05 ft | · | 71°F | 797 ft | North Raccoon |
|
Raccoon River At Van Meter, Ia
6 hours ago · USGS 05484500 |
809 cfs | 3.37 ft | 32°F | 70°F | 862 ft | North Raccoon |
|
South Skunk River At Colfax, Ia
6 hours ago · USGS 05471050 |
767 cfs | 9.08 ft | · | 69°F | 793 ft | South Skunk |
|
Cedar River At Charles City, Ia
6 hours ago · USGS 05457700 |
762 cfs | 3.15 ft | · | 70°F | 977 ft | Upper Cedar |
|
West Fork Cedar River At Finchford, Ia
6 hours ago · USGS 05458900 |
748 cfs | 8.07 ft | · | 66°F | 859 ft | West Fork Cedar |
|
Turkey River Above French Hollow Cr At Elkader, Ia
6 hours ago · USGS 05412020 |
732 cfs | 5.98 ft | · | 65°F | 726 ft | Turkey |
|
Upper Iowa River At Decorah, Ia
6 hours ago · USGS 05387500 |
690 cfs | 2.48 ft | · | 66°F | 854 ft | Upper Iowa |
|
Wapsipinicon River At Independence, Ia
6 hours ago · USGS 05421000 |
684 cfs | 5.46 ft | · | 66°F | 889 ft | Upper Wapsipinicon |
|
Raccoon River At Fleur Drive, Ia
6 hours ago · USGS 05484900 |
671 cfs | 2.15 ft | · | 71°F | 797 ft | North Raccoon |
|
Little Sioux River At Correctionville, Ia
6 hours ago · USGS 06606600 |
646 cfs | 5.49 ft | · | 76°F | 1,106 ft | Little Sioux |
|
West Nishnabotna River At Randolph, Ia
6 hours ago · USGS 06808500 |
581 cfs | 8.52 ft | 85°F | 77°F | 956 ft | West Nishnabotna |
|
Des Moines River At Humboldt, Ia
6 hours ago · USGS 05476750 |
550 cfs | 4.00 ft | · | 71°F | 1,066 ft | Upper Des Moines |
|
Upper Iowa River At Bluffton, Ia
6 hours ago · USGS 05387440 |
545 cfs | 4.14 ft | · | 66°F | 970 ft | Upper Iowa |
|
North Fork Maquoketa River Near Fulton, Ia
6 hours ago · USGS 05418400 |
432 cfs | 3.50 ft | 39°F | 64°F | 689 ft | Maquoketa |
|
East Fork Des Moines River At Dakota City, Ia
6 hours ago · USGS 05479000 |
413 cfs | 8.51 ft | · | 71°F | 1,043 ft | East Fork Des Moines |
|
South Skunk River Below Squaw Creek Near Ames, Ia
6 hours ago · USGS 05471000 |
371 cfs | 11.17 ft | · | 68°F | 872 ft | South Skunk |
|
North Raccoon River Near Jefferson, Ia
6 hours ago · USGS 05482500 |
346 cfs | 5.35 ft | 37°F | 71°F | 978 ft | North Raccoon |
|
Turkey River Near Eldorado, Ia
6 hours ago · USGS 05411850 |
343 cfs | 5.66 ft | · | 66°F | 897 ft | Turkey |
|
Little Sioux River At Linn Grove, Ia
6 hours ago · USGS 06605850 |
338 cfs | 6.03 ft | · | 69°F | 1,249 ft | Little Sioux |
|
North Skunk River Near Sigourney, Ia
6 hours ago · USGS 05472500 |
325 cfs | 5.36 ft | · | 68°F | 664 ft | North Skunk |
|
Floyd River At James, Ia
6 hours ago · USGS 06600500 |
299 cfs | 8.87 ft | · | 74°F | 1,117 ft | Floyd |
|
Boyer River At Logan, Ia
6 hours ago · USGS 06609500 |
267 cfs | 3.93 ft | · | 77°F | 1,014 ft | Boyer |
|
Rock River Near Rock Valley, Ia
6 hours ago · USGS 06483500 |
264 cfs | 4.95 ft | · | 73°F | 1,238 ft | Rock |
|
Wolf Creek Near Dysart, Ia
6 hours ago · USGS 05464220 |
261 cfs | 3.20 ft | · | 67°F | 835 ft | Middle Cedar |
|
Maquoketa River At Manchester, Ia
6 hours ago · USGS 05416900 |
253 cfs | 4.50 ft | · | 68°F | 920 ft | Maquoketa |
|
Black Hawk Creek At Hudson, Ia
7 hours ago · USGS 05463500 |
248 cfs | 6.84 ft | · | 69°F | 897 ft | Middle Cedar |
|
Indian Creek Near Mingo, Ia
6 hours ago · USGS 05471200 |
232 cfs | 4.35 ft | · | 68°F | 827 ft | South Skunk |
|
East Nishnabotna River At Red Oak, Ia
6 hours ago · USGS 06809500 |
226 cfs | 5.95 ft | · | 76°F | 1,013 ft | East Nishnabotna |
|
Volga River At Littleport, Ia
6 hours ago · USGS 05412400 |
221 cfs | 4.98 ft | · | 66°F | 694 ft | Turkey |
|
Little Cedar River Near Ionia, Ia
6 hours ago · USGS 05458000 |
212 cfs | 4.23 ft | · | 67°F | 1,000 ft | Upper Cedar |
|
West Nishnabotna River At Hancock, Ia
6 hours ago · USGS 06807410 |
211 cfs | 2.38 ft | · | 75°F | 1,089 ft | West Nishnabotna |
|
Beaver Creek At New Hartford, Ia
6 hours ago · USGS 05463000 |
204 cfs | 2.68 ft | · | 66°F | 890 ft | Middle Cedar |
|
Wapsipinicon River Near Tripoli, Ia
6 hours ago · USGS 05420680 |
191 cfs | 8.16 ft | · | 65°F | 1,019 ft | Upper Wapsipinicon |
|
South Raccoon River At Redfield, Ia
6 hours ago · USGS 05484000 |
177 cfs | 2.64 ft | 32°F | 70°F | 917 ft | South Raccoon |
|
Boone River Near Webster City, Ia
6 hours ago · USGS 05481000 |
172 cfs | 2.20 ft | 35°F | 68°F | 1,028 ft | Boone |
|
South Skunk River Near Ames, Ia
6 hours ago · USGS 05470000 |
167 cfs | 3.61 ft | · | 68°F | 928 ft | South Skunk |
|
Squaw Creek At Ames, Ia
6 hours ago · USGS 05470500 |
164 cfs | 2.07 ft | · | 69°F | 907 ft | South Skunk |
|
Maple River At Mapleton, Ia
6 hours ago · USGS 06607200 |
155 cfs | 4.70 ft | · | 77°F | 1,114 ft | Maple |
|
Iowa River Near Rowan, Ia
6 hours ago · USGS 05449500 |
152 cfs | 4.36 ft | · | 70°F | 1,187 ft | Upper Iowa |
|
Salt Creek Near Elberon, Ia
6 hours ago · USGS 05452000 |
149 cfs | 6.72 ft | · | 68°F | 802 ft | Middle Iowa |
|
English River At Kalona, Ia
6 hours ago · USGS 05455500 |
149 cfs | 4.41 ft | · | 70°F | 655 ft | Lower Iowa |
|
Nodaway River At Clarinda, Ia
6 hours ago · USGS 06817000 |
144 cfs | 10.77 ft | · | 75°F | 966 ft | West Nodaway |
|
Winnebago River At Mason City, Ia
6 hours ago · USGS 05459500 |
135 cfs | 4.96 ft | · | 68°F | 1,101 ft | Winnebago |
|
North Raccoon River Near Sac City, Ia
6 hours ago · USGS 05482300 |
134 cfs | 7.04 ft | 75°F | 70°F | 1,179 ft | North Raccoon |
|
Monona-Harrison Ditch Near Turin, Ia
6 hours ago · USGS 06602400 |
130 cfs | 5.00 ft | · | 77°F | 1,021 ft | Monona-Harrison Ditch |
|
Yellow River At Ion, Ia
6 hours ago · USGS 05389000 |
125 cfs | 5.78 ft | · | 65°F | 681 ft | Coon-Yellow |
|
North River Near Norwalk, Ia
1 day ago · USGS 05486000 |
105 cfs | 6.07 ft | · | 89°F | 811 ft | Lake Red Rock |
|
East Nishnabotna River Near Atlantic, Ia
6 hours ago · USGS 06809210 |
103 cfs | 2.65 ft | · | 74°F | 1,109 ft | East Nishnabotna |
|
Timber Creek Near Marshalltown, Ia
6 hours ago · USGS 05451700 |
102 cfs | 3.24 ft | · | 69°F | 862 ft | Middle Iowa |
|
Fourmile Creek Near Ankeny, Ia
6 hours ago · USGS 05485605 |
102 cfs | 2.42 ft | · | 69°F | 911 ft | Lake Red Rock |
|
Old Mans Creek Near Iowa City, Ia
6 hours ago · USGS 05455100 |
99 cfs | 2.42 ft | 46°F | 69°F | 654 ft | Lower Iowa |
|
Beaver Creek Near Grimes, Ia
6 hours ago · USGS 05481950 |
98 cfs | 3.71 ft | · | 70°F | 829 ft | Middle Des Moines |
|
Big Bear Creek At Ladora, Ia
6 hours ago · USGS 05453000 |
88 cfs | 11.30 ft | · | 70°F | 771 ft | Middle Iowa |
|
Cedar Creek Near Oakland Mills, Ia
6 hours ago · USGS 05473400 |
87 cfs | 3.08 ft | · | 67°F | 590 ft | Skunk |
|
Middle Raccoon River At Panora, Ia
6 hours ago · USGS 05483600 |
85 cfs | 4.28 ft | 35°F | 72°F | 997 ft | South Raccoon |
|
Turkey River At Spillville, Ia
6 hours ago · USGS 05411600 |
80 cfs | 2.41 ft | · | 66°F | 1,067 ft | Turkey |
|
South Fork Iowa River Ne Of New Providence, Ia
6 hours ago · USGS 05451210 |
72 cfs | 2.80 ft | · | 66°F | 963 ft | Upper Iowa |
|
Middle Raccoon River Near Bayard, Ia
6 hours ago · USGS 05483450 |
71 cfs | 9.17 ft | · | 73°F | 1,054 ft | South Raccoon |
|
Chariton River Near Moulton, Ia
6 hours ago · USGS 06904010 |
69 cfs | 18.65 ft | · | 70°F | 847 ft | Upper Chariton |
|
Ocheyedan River Near Spencer, Ia
6 hours ago · USGS 06605000 |
65 cfs | 2.31 ft | · | 69°F | 1,317 ft | Little Sioux |
|
Soldier River At Pisgah, Ia
6 hours ago · USGS 06608500 |
59 cfs | 2.79 ft | · | 77°F | 1,047 ft | Blackbird-Soldier |
|
Middle River Near Indianola, Ia
6 hours ago · USGS 05486490 |
57 cfs | 7.30 ft | · | 70°F | 794 ft | Lake Red Rock |
|
Rock River Below Tom Creek At Rock Rapids, Ia
6 hours ago · USGS 06483290 |
44 cfs | 6.83 ft | · | 72°F | 1,316 ft | Rock |
|
South River Near Ackworth, Ia
6 hours ago · USGS 05487470 |
38 cfs | 4.86 ft | · | 70°F | 805 ft | Lake Red Rock |
|
Clear Creek Near Coralville, Ia
6 hours ago · USGS 05454300 |
34 cfs | 1.11 ft | · | 69°F | 660 ft | Lower Iowa |
|
Fourmile Creek At Des Moines, Ia
6 hours ago · USGS 05485640 |
34 cfs | 3.79 ft | · | 70°F | 813 ft | Lake Red Rock |
|
Floyd River At Alton, Ia
6 hours ago · USGS 06600100 |
34 cfs | 5.59 ft | · | 72°F | 1,289 ft | Floyd |
|
Bloody Run Creek Near Marquette, Ia
6 hours ago · USGS 05389400 |
31 cfs | 4.21 ft | · | 65°F | 634 ft | Coon-Yellow |
|
Thompson River At Davis City, Ia
6 hours ago · USGS 06898000 |
27 cfs | 1.05 ft | · | 71°F | 910 ft | Thompson |
|
Walnut Creek At Des Moines, Ia
6 hours ago · USGS 05484800 |
24 cfs | 3.32 ft | · | 71°F | 808 ft | North Raccoon |
|
Chariton River Near Chariton, Ia
6 hours ago · USGS 06903400 |
23 cfs | 4.09 ft | · | 70°F | 968 ft | Upper Chariton |
|
Clear Creek Near Oxford, Ia
6 hours ago · USGS 05454220 |
20 cfs | 2.00 ft | · | 70°F | 722 ft | Lower Iowa |
|
Walnut Creek Near Hartwick, Ia
6 hours ago · USGS 05452200 |
18 cfs | 1.11 ft | · | 68°F | 806 ft | Middle Iowa |
|
Richland Creek Near Haven, Ia
6 hours ago · USGS 05451900 |
14 cfs | 10.58 ft | · | 69°F | 817 ft | Middle Iowa |
|
Cedar Creek Near Bussey, Ia
6 hours ago · USGS 05489000 |
14 cfs | 4.47 ft | · | 70°F | 696 ft | Lower Des Moines |
|
Chariton River Near Rathbun, Ia
6 hours ago · USGS 06903900 |
14 cfs | 2.21 ft | · | 71°F | 855 ft | Upper Chariton |
|
Big Creek Near Mt. Pleasant, Ia
6 hours ago · USGS 05473450 |
10 cfs | 3.29 ft | · | 66°F | 672 ft | Skunk |
|
White Breast Creek Near Dallas, Ia
6 hours ago · USGS 05487980 |
9 cfs | 5.98 ft | · | 70°F | 773 ft | Lake Red Rock |
|
Rapid Creek Near Iowa City, Ia
6 hours ago · USGS 05454000 |
7 cfs | 3.89 ft | · | 67°F | 688 ft | Lower Iowa |
|
English Creek Near Knoxville, Ia
6 hours ago · USGS 05488200 |
4 cfs | 8.07 ft | · | 70°F | 749 ft | Lower Des Moines |
|
East Fork 102 River At Bedford, Ia
6 hours ago · USGS 06819185 |
3 cfs | 10.70 ft | · | 72°F | 1,084 ft | One Hundred And Two |
|
South Fork Chariton River Near Promise City, Ia
6 hours ago · USGS 06903700 |
3 cfs | 2.97 ft | · | 70°F | 922 ft | Upper Chariton |
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Flow report FAQ
About Iowa streamflow
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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