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3/14/2024
WT Staff
HAPPENING NOW
Bossier Parish BWA
NWS: Severe weather this afternoon and tonight for northwest LA
Water news for Thursday, March 14, 2024 212 pm CDT
National Weather Service Hazardous Weather Outlook issued 1149 am CDT March 14
This Hazardous Weather Outlook is for north central Louisiana, northwest Louisiana
DAY ONE...This afternoon and tonight, thunderstorm chances will begin to increase into the afternoon, with
the threat for severe weather increasing into the evening and overnight hours. All modes of severe weather will be possible, with damaging winds and large hail being the primary threat. However, the tornado threat appears to be increasing, as low-level wind shear values look higher than previously anticipated. Flash flooding may also become a concern, as thunderstorms look to train in some locations into the overnight hours.
Severe thunderstorm chances may linger into Friday morning, before chances diminish into general thunder. These rain chances will linger into the weekend, before a cold front drys things out to start the new workweek.
Impacting Columbia-Union-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto-Red River-Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn-Grant-Caldwell-La Salle Parishes
Drinking Water Advisories
Bossier Parish Water Works has issued a BWA following a system-wide service outage caused by a water main break yesterday. The BWA applies to customers connecting in the Country Place Subdivision Water System until further notice.
Check the yellow tags on the map for details.
Streamflow Situation provisional data from USGS current streamflow monitors
Streamflows in the northwest Regions 1 to 3, and the northeast Region 7 run largely normal Thursday, just ahead of forecast severe thunderstorms with possibility of large hail, tornados and flash flooding for north central and northwest Louisiana. Flows in Regions 4 and 5 continue below normal to much below normal, keeping this area on the drought map.
Four active flood events are on the monitors Thursday, including Bayou Dorcheat and Bayou Bodcau in the northwest Region 1 watershed. This region is also under a hazardous weather outlook for more rain and possible flash flooding.
Pearl River continues to flood along the east state line, observed to be more than two feet out of the channel near Bogalusa and more than a foot and a half over at Pearl River.
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
Region 3 north-central Morehouse Parish persists as the only rated area of the north central state today. Region 4 has popped up with an area rated moderate drought, extending from the southeast quarter of Vernon Parish to the northeast quarter of Beauregard and a band along the west side of Allen Parish. The remainder of Regions 4 and 5 remain 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 13 at a wind speed 5.5 mph. This image is mostly cloud obscured however it does have some interesting HABs to observe.
Lac des Allemands appeared in a previous image dated March 12 with a localized HAB on the southwest shoreline. In the March 13 picture, this area is obscured by cloud, however, the north end of the water is in view. Bayou Fortier in the north end of the water body has prominent open water HABs matching the color scale for a moderate concentration bloom, 100 thousand cells per 100 ml. Black Bay HAB sticks out through a break in the coastal cloud mass, showing us the widespread and high concentration HAB, still right up there around 600 to 700 thousand cells per 100 ml.
Lake Pontchartrain open water and west shoreline is partially visible in this image with no HABs observed. Lake Maurepas is completely in focus with fringe of cloud obscuring the east shore, no HABs observed. Lakes Verret and Palourde are cloud obscured, no interpretation available.
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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