5/1/2024
WT Staff
HAPPENING NOW
Village of Mermentau BWA
NWS: Dense Fog advisory extended
Water news for Tuesday, April 30, 2024 updated 942 am CDT
National Weather Service Hazardous Weather Outlook issued 634 am May 1
DENSE FOG ADVISORY NOW IN EFFECT UNTIL 9 AM CDT THIS MORNING
Visibility less than one mile in dense fog in portions of southeast Louisiana and southern Mississippi. Low visibility could make driving conditions hazardous. If driving, slow down, use your low-beam headlights, and leave
plenty of distance ahead of you.
Impacting Iberville-Assumption-St. James-St. John The Baptist-Upper Lafourche-St. Charles-Upper Terrebonne-Lower Terrebonne-Lower
Lafourche-Coastal Jefferson Parish-Lower Plaquemines-Lower St. Bernard-Southeast St. Tammany-Eastern Orleans-Northern St.
Tammany-Southwestern St. Tammany-Western Ascension-Eastern Ascension-Lower Jefferson-Upper Plaquemines-Central Plaquemines Parishes-Pearl River-Northern Hancock-Northern Harrison-Northern Jackson-Southern Hancock-Southern Harrison-Southern Jackson Counties of Mississippi, including the cities of Sorrento, Bayou Cane, Delacroix, Laplace,Belle Chasse, McNeil, Galliano, Pass Christian, Braithwaite, Boothville, Grand Isle, Yscloskey, Saucier, Chauvin, Donaldsonville, Gonzales, Moss Point, Acy, Norco, Convent, Bay St. Louis, Thibodaux, Montegut, Myrtle Grove, St. Martin, Bayou Sorrel, Reserve, Houma, Port Sulphur, Cocodrie, Poplarville, Lafitte, Plaquemine, Crossroads, Gramercy, Lyman, Barataria, Gautier, Golden Meadow, Ocean Springs, Covington, Prairieville, Paincourtville, Empire, Slidell, Diamondhead, East New Orleans, Biloxi, Pierre Part, Waveland, Jean Lafitte, Madisonville, Escatawpa, Pascagoula, Pearlington, Labadieville, Buras, Pointe A La Hache, Vancleave, Folsom, Larose, Mandeville, Necaise, Shell Beach, Dulac, Sellers, Gulfport, Leeville, Kiln, Cut Off, Long Beach, White Castle, Alliance, Wade, Destrehan, Picayune, Lutcher, Bush, Raceland, Geismar, and Venice
Drinking Water Matters
Acadia Parish: Village of Mermentau issued a boil water advisory following a loss of pressure (under 20 PSI) throughout the water system on Monday. Village of Mermentau community water system earned a B grade 89% from Louisiana Department of Health in 2022. The system has been active since 1974 and supplies 771 residential customers from a groundwater source.
WT USA Flows and Flood Tracker provisional data from the network of USGS streamflow monitors
Seventy-five streamflow gauges record flooding in the USA Wednesday, down from nintey on Tuesday. WT tracks the nation's most common natural disaster dynamics through the states of New York, Ohio, Georgia and Louisiana. As of this report we are reporting on 4 active floods, all in Louisiana.
New Orleans is under dense fog advisory again this morning with one less flood monitored in the west since our last report. Sabine River is no longer flooding near Bon Wier, TX tucking back inside the channel around 230 am this morning. Sabine River still runs a foot and a half over flood stage downstream near Ruliff, TX. Calcasieu River is up again overnight near Glenmora, presently running a foot and three inches over flood stage. Flow appears to have peaked and starting to decline. Bayou Anococo continues to flood near Rosepine, running a foot and three inches over flood stage and beginning to decline. Bundick Creek stopped rising just short of flood stage, still recorded Wednesday morning in 99th percentile flow on a steady decline trend near DeRidder. North in Region 1 Bayou Bodcau is remains on a gradual declining flow trend near Shreveport, down three inches overnight, currently running eight feet three inches over flood stage. Bayou San Patricio is no longer in a 99th percentile flow near Benson.
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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