Atchafalaya River at Simmesport, LA

The last 7 days and the forecast

NWS forecast issued Mon, Oct 12, 10:52 AM. Forecasts change as rain falls and as upstream water arrives.

Flood stages

What floods at each level

From the National Weather Service, highest first.

• 61 ftThe river level is at the net grade protection of the levee system
• 60 ftThe river is at the lowest height of the back ring protection levee around the city of Simmesport
• 43 ftThe river stage is at the natural ground elevation of areas protected by the levee system
• 40 ftThere will be flooding of areas inside the levees of the Atchafalaya floodway. Considerable flooding in the backwater storage area in Avoyelles Parish.
• 35 ftBackwater flooding of unprotected areas above Simmesport will begin

Highest crests on record

1. 59.13 ft — May 16, 1927
2. 57.33 ft — May 16, 1922
3. 57.14 ft — April 30, 1945
4. 55.83 ft — May 13, 1912
5. 55.03 ft — March 1, 1937

Recent crests: 38.2 ft (May 1, 2025) · 31.53 ft (March 24, 2022) · 34.87 ft (April 11, 2021) · 39.88 ft (April 14, 2020) · 42.06 ft (March 13, 2019)

Up and down the river, and nearby

• Bayou Des Glaises Diversion Ch near Moreauville, LA
• Old River Iflow/Outflow Channel at Outflow Channel below Hydropower, LA
• Bayou Des Glaises Diversion Ch. at Moreauville, LA
• Red River 6.5 Miles Below the Confluence of the Black, LA
• Little River at Boggy Bayou Road, LA
• State Canal near Krotz Springs, LA
• Bayou Courtableau at Washington, LA
• Buffalo River at Woodville, MS