WEATHER RECAP, FORECAST & CRESTS:
- We received between 4-6" of rainfall over the past two days parish-wide.
- TOMORROW we will see severe weather. Expect the threat of high winds, rain, and the potential for tornadoes.
- Flash Flooding: Because of the amount of rainfall we have received, we are under a flash flood watch. It will not take much rainfall tomorrow for us to see flash flooding.
- Waterway Flooding:
DORCHEAT BAYOU - As of now, Dorcheat is expected to rise and crest at 18.5' by Monday. This is 1.5' under moderate flood stage.
BISTINEAU - As of now, Bistineau is expected to rise and crest at 143.1' by Tuesday. This is 1' below moderate flood stage, and 2' below major flood stage (when we issue no wake orders and begin seeing a few homes with encroaching water.)
** It is important to note that while these forecasts are the Quantified Precipitation Forecasts, taking into account the local and northern rainfall amounts that have fallen as of now, the rain expected to fall locally and north of us tomorrow will be calculated in and could increase these predictions, to what degree we don't yet know. **
** We were at 141.3' prior to the recent rainfall. This gives us a simplified idea of what rain it can take in certain areas, both locally and north of us, to produce a 2' rise. Northern areas along I-30 in Arkansas received 6-8" of rainfall over the past 48 hours. **
** Regarding the floodgates-- THIS IS IMPORTANT TO READ AND UNDERSTAND, PLEASE. Water is currently and successfully flowing over the spillway at Lake Bistineau at the highest possible rates. The gates are drain gates, yes, but THEY DO NOT INCREASE THE OUTFLOW OF WATER WHEN WATER IS FLOWING OVER THE SPILLWAY. They are not designed to do this, as they are only engineered to slowly drain the lake for drawdowns when the water drops below the spillway. Opening the gates during a flooding event does not improve the outflow, but it does damage the dam because it allows erosion to occur in areas of the dam that are not designed for such high-pressure outflow. This was proven in 2016's flood when the gates were opened to see if it sped up the outflow. The damages to our dam were just repaired. Opening the gates would only cause further damage and over time, such damages could lead to losing our lake as we know it. OPENING THE GATES WILL NOT SAVE YOUR PROPERTY DURING MAJOR FLOODING, BUT WILL ONLY DAMAGE THE DAM. **
- Estimated Outlook:
> Tomorrow (Saturday) - Severe weather, risk of tornadoes
> Sunday-Tuesday - Break in the rain
> Monday/Tuesday - Crest on Dorcheat and Bistineau (stay tuned for updates on the crest levels)
> Tuesday-Thursday - More rain (stay tuned)
Dorcheat and Bistineau property owners: Pick up/self load filled bags at either Parish Barn (Crichton Rd, Sibley or Hwy 2, Sarepta) from 7:00am-3:30pm M-F.