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Where are you getting your gage height for Atchafalaya from? Do you have a link? I’m not seeing a 3.5ft rise in the river.
I’m seeing a 1ft rise at Butte La Rose on USGS here: https://waterdata.usgs.gov/monitoring-location/07381515/#period=P30D&dataTypeId=continuous-00065-0&showMedian=false
Local rainfall isn’t going to move the needle very much on a river that big.
