6/7/2024
WT Staff
 HAPPENING NOW
Friday, June 7, 2024
WT USA Flood Tracker - Louisiana update
June 7, 2024 1019 am EDT
WT USA Flows and Flood Tracker provisional data from the network of USGS streamflow monitors
Fifty-four floodings light up the USA national network of the USGS Waterwatch Friday, down from sixty-seven floods on the sample set yesterday. WT USA is tracking eleven of these flood events as they occur in our coverage area New York, Ohio, Georgia and Louisiana. As of this report, all eleven active flood sites are located in Louisiana.
Watershed Region 2 Little River breached flood stage near Rochelle around 230 am, this is the eleventh site to light up the flood dashboard in the monitoring network today. Region 1 watershed Bayou Bodcau Lake is running two and a half feet above the basin and still on a steady rise near Shreveport. Caddo Lake continues flooding near Mooringsport, ten inches over and still rising, however the rate of rise is slowing down and looks to be reaching peak level soon. Bayou Dorcheat continues to flood, the level is two and a half feet over flood stage near Springhill and about the same level over downstream near Minden. South into Region 4 watershed, border river Sabine has breached moderate flood stage just before 6 am, currently four feet over near Logansport and rising. Sabine River got up over moderate flood stage near Burkeville around 4 pm yesterday, currently five feet above the channel and leveling off there. Downstream to the monitor near Bon Wier, moderate flood stage was passed yesterday before noon, this location sees 42400 cubic feet per second moving past the monitor running more than four feet over the channel and still increasing, peak flow is yet to be reached. The last monitor on Sabine is near Ruliff, here we see 22000 cubic feet per second passing the sensors and just one foot over. The glut of flood water is on its way to the Gulf, this site will receive double the volume and spill out over the next hours and days even as the citizens of Louisiana have been dropping their flood insurance. THe east side of Region 4 watershed is drained by the Calcasieu River, still flooding two feet over near Glenmora. Flooding near Oberlin ended around the noon hour yesterday. South of LA-190 and over the height of land dividing watershed regions 4 and 5 the Mermentau River signals just a fraction of an inch above flood stage at Mermentau. This location is up and down, will be flooding on an off for the near foreseeable future until the mass of surface runoff exits the landscape into the Gulf. Three additional locations in Regions 1 and 2 along the Texas border are signalling above the 99th percentile, flood stage is not documented for those sites. For more inforfmation on the flood trend in Louisiana, see black tags indicating flood flow volume and gauge height, blue tags for 99th percentile flows, updated daily here.
As many drinking water facilities are supplied from surface water reservoirs, the streamflow situation is pertinent to both drinking water supply and quality. High flows can stir up sediment and cause turbidity in the reservoirs, requiring additional treatments to render the water potable. Low flow volume is linked to warmer temperatures in the reservoir and can be an issue for water quality where HABs are present. WT tracks streamflow trends with an eye to the impacts on drinking water supply and quality in each of the state's watersheds. Check the watershed layer on the map to see the direction of flow and streamflows that may be impacting drinking water today.
USGS Provisional Data Statement
Data are provisional and subject to revision until they have been thoroughly reviewed and received final approval. Current condition data relayed by satellite or other telemetry are automatically screened to not display improbable values until they can be verified.
Provisional data may be inaccurate due to instrument malfunctions or physical changes at the measurement site. Subsequent review based on field inspections and measurements may result in significant revisions to the data.
Data users are cautioned to consider carefully the provisional nature of the information before using it for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences. Information concerning the accuracy and appropriate uses of these data or concerning other hydrologic data may be obtained from the USGS.
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