Major Flood
22 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
19 ft
Minor Flood
16 ft
Action Stage
13 ft
What Floods at Each Level
27.9 ft
The water overtops the levee.
25.4 ft
The water reaches the flood of record set in 1965.
25 ft
Major flooding occurs in McGregor.
23.5 ft
The road near the casino in Marquette is closed.
22 ft
Water covers the north end of Main Street.
21.5 ft
Railroad tracks near the casino in Marquette are closed.
19.6 ft
The road to the Prairie du Chien waste water treatment facility is flooded.
19 ft
Flooding of some residential areas begin.
18 ft
Pumping operations begin at the Prairie du Chien waste water treatment facility.
17 ft
Minor lowland flooding begins, and access to parks near the river in Prairie du Chien is affected.
16.5 ft
Water may begin to go over the road covering part of Highway C near Highway 18.
16 ft
The Washington Street Bridge to Saint Feriole Island begins to flood and is closed. Pumping operations are underway.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Apr 23, 1965 | 25.38 ft | 276,000 cfs |
| Apr 20, 2001 | 23.75 ft | 248,000 cfs |
| Apr 28, 2023 | 22.91 ft | — |
About This Gauge
USGS Site
NWS LID
MCGI4
River
Mississippi River
County
Clayton, IA
Coordinates
43.0270°N, 91.1726°W
Get Flood Alerts for Mississippi River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Mississippi River at McGregor?
The Mississippi River at McGregor gauge is maintained by USGS (site 05389500) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Mississippi River at McGregor?
The NWS-defined flood stage for Mississippi River at McGregor is 16 feet. Action stage begins at 13 feet. Moderate flooding starts at 19 feet, and major flooding at 22 feet.
How do I get alerts when Mississippi River rises?
Download StormCast free on Google Play, go to River Gauges, and add Mississippi River at McGregor to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Mississippi River at McGregor gauge located?
The gauge is located in Clayton County, Iowa at coordinates 43.0270°N, 91.1726°W. USGS site number: 05389500. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Mississippi River
On This River
Upstream: Mississippi River below Lock and Dam 9 - Lynxville
Downstream: Mississippi River at Clayton
More Resources
Source & Notes
Data provided by: Observations courtesy of U.S. Geological Survey
- River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.
- River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 48 hours into the future from the forecast issuance time.