Major Flood
12 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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This is an NWS forecast point (LID: MCGL1). Live data may be limited. View on NWS AHPS →
FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
7 ft
Minor Flood
6 ft
Action Stage
4 ft
What Floods at Each Level
20 ft
There is a catastrophic flood threat. Evacuation of the cities of Berwick and Morgan City is strongly recommended. Flood walls protect the cities to an elevation of 21 feet.
12 ft
There is a major flood threat. Back water flooding of Bayou Bouef will cause damage east of Morgan City to the community of Amelia. Structures on the river side of protection walls in Morgan City and Berwick will be under water. River traffic restrictions will be strictly enforced.
9 ft
Structures on the river side of protection walls in Morgan City and Berwick will be under water. River traffic restrictions will be strictly enforced.
7 ft
Buildings at the foot of Ann Street on the river side of the flood wall will flood as water overtops the Rio Oil Company dock. Buildings on the river side of the Berwick floodwall will flood. River traffic restrictions will be strictly enforced. In addition, backwater flooding could potentially impact portions areas around Lake Palourde and Stephensville.
6 ft
Flood stage. The city dock will be under water. Water will cover the lower end of Belleview Front Street in Berwick. Vessel traffic will be affected by stronger river current and vessel traffic safety rules will be strictly enforced by the U.S. Coast Guard.
5 ft
Floodwall gates will be closed to protect against higher stages. Vessel traffic will be affected by stronger river current and vessel traffic safety rules will be strictly enforced by the U.S. Coast Guard.
4 ft
Action stage. Water will move up the bank and across access roads below the city dock. Floodwall gates should be closed by the 5 foot stage to protect against higher stages. Vessel traffic will be affected by stronger river current and vessel traffic safety rules will be strictly enforced by the U.S. Coast Guard.
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 |
|---|---|---|
| May 27, 1973 | 10.53 ft | — |
| May 28, 2011 | 10.35 ft | — |
| Jul 13, 2019 | 10.06 ft | 488,187 cfs |
About This Gauge
NWS LID
MCGL1
River
Atchafalaya River
County
St. Mary, LA
Coordinates
29.6964°N, 91.2108°W
Get Flood Alerts for Atchafalaya 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 Atchafalaya River at Morgan City?
The Atchafalaya River at Morgan City gauge is maintained by USGS 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 Atchafalaya River at Morgan City?
The NWS-defined flood stage for Atchafalaya River at Morgan City is 6 feet. Action stage begins at 4 feet. Moderate flooding starts at 7 feet, and major flooding at 12 feet.
How do I get alerts when Atchafalaya River rises?
Download StormCast free on Google Play, go to River Gauges, and add Atchafalaya River at Morgan City 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 Atchafalaya River at Morgan City gauge located?
The gauge is located in St. Mary County, Louisiana at coordinates 29.6964°N, 91.2108°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Atchafalaya River
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Source & Notes
Data provided by: U.S. Army Corps of Engineers, Observations courtesy of U.S. Army Corps of Engineers
- 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.