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3/16/2024
WT Staff
HAPPENING NOW
Bayou Dorcheat up 5 feet overnight near Springhill
NWS: Thunderstorms continue in north central, northwest
Water news for Saturday, March 16, 2024 330 pm CDT
National Weather Service Hazardous Weather Outlook issued 508 am CDT March 16
This Hazardous Weather Outlook is for north central Louisiana, northwest Louisiana
Showers and thunderstorms will return through Saturday morning, becoming more widespread into the afternoon and evening. Areas along and south of the Interstate 20 corridor may see flash flooding develop resulting from heavy rainfall, increasing in likelihood into deep east Texas. Thunderstorms will come to an end Sunday morning.
Impacting Union-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto-
Red River-Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn-Grant-Caldwell-La Salle Parishes
Streamflow Situation provisional data from USGS current streamflow monitors
Above normal to high streamflows light up the grid in northwest Regions 1 and north central watershed Region 3 Saturday while thunderstorms roll across the region. Storms are expected to continue overnight. Normal flow levels are the common rating in east LA Region 7, while flows in Regions 4 and 5 continue dt below normal to much below normal.
Four active flood events continue in Louisiana Saturday. Already a foot and a half over flood stage Friday, Bayou Dorcheat is up another five feet overnight near Springhill. Bayou Bodcau is holding steady at 10 inches over flood stage near Shreveport. Region 1 to 3 remains under NWA hazardous weather outlook for thunderstorms until Sunday morning.
Pearl River is up again near Bogalusa in Region 7, running two feet ten inches above flood stage. Downstream flooding continues at Pearl River, close to two feet over flood stage, an increase of six inches since yesterday.
One site in Region 3 is running at extreme high, Little Corney Bayou near Lillie. No flood stages are documented for this site, running ten and a half feet deep as of this report. There are no extreme low flows registering in the network today.
Check black tags for flood details, blue tag for 99th percentile high flow updated throughout the day.
Drought Map USGS 7-day average streamflow against seasonal average
Moderate drought has overtaken all of Region 4 Saturday, clamped down on all territory but the Sabine River channel down the west state line. Next door in Region 5, the rating remains below normal, excepting Evangeline and Acadia Parishes.
Central Morehouse Parish is holding on to a scrap of below normal rating in the north central area, in spite of all the rain in the region.
Drinking Water Advisories
Slidell issued a BWA impacting nearly 10,000 customers on the Cross Gates Water System after contractors installing cable struck potable water Thursday. Breaking buried water lines with construction equipment is a vector for microbiologic contamination. The BWA is required until the line can be sanitized and water tests safe. br>
Check the yellow tags on the map for details.
Harmful Algal Bloom HABs from National Centers for Coastal Ocean Science (NCCOS) satellite monitoring program
The latest image supplied by NCCOS was captured March 14 at a wind speed 6 mph. This image is mostly cloud obscured with some water showing HABs to report.
Black Bay HAB sticks out through a break in the coastal cloud mass, showing widespread HAB, concentration dropped down to 100 to 200 thousand cells per 100 ml.
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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