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3/15/2024
WT Staff
HAPPENING NOW
Slidell BWA
NWS: Thunderstorms continue in north central, northwest
Water news for Friday, March 15, 2024 1120 am CDT
National Weather Service Hazardous Weather Outlook issued 524 am CDT March 15
This Hazardous Weather Outlook is for north central Louisiana, northwest Louisiana
DAY ONE...Thunderstorm chances will continue through the morning and early afternoon. All modes of severe weather will still be possible, with damaging winds and large hail being the primary threats. Flash
flooding will also be a concern, as thunderstorms look to train in the early morning hours across portions of southern Arkansas and north Louisiana.
Rain chances will linger through the weekend, before a cold front drys things out to start the new workweek.
Impacting north central Louisiana, northwest Louisiana
Drinking Water Advisories
Slidell has issued a BWA impacting nearly 10,000 customers on the Cross Gates Water System following a water main break yesterday. Contractors digging around buried municipal infrastructure have punched through a water line for the second time in a week. Breaking water lines by digging through 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.
Streamflow Situation provisional data from USGS current streamflow monitors
Above normal streamflows for northwest Regions 1 to 3 following thunderstorms yesterday and more rain today. Normal flow levels run through east LA Region 7 Friday. Flows in Regions 4 and 5 continue below normal to much below normal, promoting this area to the drought map for the weekend ahead.
Four active flood events continue in Louisiana Friday. Bayou Dorcheat runs over and foot and a half past flood stage near Springhill, as Bayou Bodcau runs 10 inches over flood stage in Region 1. This area remains under NWA hazardous weather outlook for thunderstorms today.
Pearl River continues to flood along the east state line, up several inches overnight near Bogalusa in Region 7. Downstream flooding continues at Pearl River, more than a foot and a half over flood stage as of this report.
None of the monitored sites indicate 99th percentile flows or extreme low flows in the network Thursday.
Check black tags for flood details updated throughout the day.
Drought Map USGS 7-day average streamflow against seasonal average
Moderate drought expands in Region 4 overnight. The moderate drought rating appeared yesterday, claiming the southeast quarter of Vernon Parish, the northeast quarter of Beauregard and a band along the west side of Allen Parish. Today, a wider swath of Allen Parish is caught up in moderate drought, fully two-thirds of the Parish from the north to the south, running south into the northeast quarter of Calcasieu and the northwest quarter of Jefferson Parish. The remaining surface area Regions 4 and 5 are still rated below normal, excepting the Sabine River channel on the west edge of Region 4 and Evangeline and Acadia Parishes in Region 5.
Harmful Algal Bloom HABs from National Centers for Coastal Ocean Science (NCCOS) satellite monitoring program
The latest image supplied by NCCOS was captured yesterday, 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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