LOUISIANA FLOW REPORT
Last Updated: December 22, 2025
In Louisiana, recent streamflow data indicates significant deviations from normal flow levels across various rivers and waterways, impacting local ecosystems, water-based recreation, and potentially the livelihoods of those residing near these bodies of water. The Mississippi River at Baton Rouge, a major water artery and a critical component of the state's natural and commercial infrastructure, shows a current streamflow of 146,000 cubic feet per second (cfs), which is 67.99% below normal, coupled with a minor decrease in the last 24 hours. Similarly, the Pearl River near Bogalusa and the Lower Atchafalaya River at Morgan City are experiencing lower than average streamflows at -73.58% and -72.32% of normal flow levels, respectively. Such conditions can influence the seasonal patterns of fish and other wildlife, and water enthusiasts should be aware of potential changes in habitat and navigability.
Noteworthy increases in streamflow have been reported in certain areas, which may be of interest to whitewater enthusiasts and indicate potential flooding concerns. The Bayou Teche at Adeline Bridge near Jeanerette saw a dramatic 480.1% increase in streamflow in the last 24 hours, although it remains 36.93% below normal flow, with a current gage height of 1.45 feet. The Mermentau River at Mermentau also experienced a significant surge, with a change of 476.47% in the last 24 hours, indicating potential for high-water events that could affect nearby communities like Mermentau. Conversely, the Little River near Rochelle is experiencing a severe flow drought, registering at a startling -92.95% of normal levels, which could impact local wildlife and recreational activities along this waterway. These deviations from normal streamflow patterns highlight the need for continued monitoring and preparedness for a range of water-related impacts, from drought conditions to possible flooding, affecting both natural habitats and human activities along Louisiana's diverse and dynamic river systems.
Louisiana is a state in the southern United States with a humid subtropical climate. The state has many major surface water flows, including the Mississippi River, the Atchafalaya River, the Red River, the Ouachita River, and the Sabine River. These rivers and their tributaries are subject to flooding during the state's frequent severe weather events, such as hurricanes and tropical storms. Louisiana also has numerous reservoirs and dams used for flood control and hydroelectric power generation. The state's hydrology is influenced by its flat terrain and extensive wetlands, which act as natural reservoirs. Snowpack is generally not a significant factor in Louisiana's hydrology, but heavy rainfall events can lead to flash flooding and river flooding.
Winter Storm Warnings
December 22 2025
Residents across portions of Louisiana, including south-central and southeast areas, are advised to exercise caution due to a Dense Fog Advisory in effect until 9 AM CST today, as visibility may be reduced to a mere quarter of a mile. This includes major cities such as New Orleans, where dense fog will create hazardous driving conditions. The National Weather Service urges drivers to slow down, use their headlights, and leave plenty of distance ahead of them on the roads. The public is advised to stay tuned to local forecasts and be prepared for low visibility, which could impact the morning commute.