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9/20/2024
WT Staff
 Got water comments, questions or concerns? Give us a call at 877-52-WATER (877-529-2837), or email us at info@wtla.us
September 20, 2024 updated 1114 am CDT
Bluegreen concentration down across the board, no hot spots
WT HAB Tracker from the satellite monitoring program of National Centers for Coastal Ocean Science (NCCOS)
The latest upload from NCCOS is dated September 19, taken at wind speed 2.7 mph. This image is clear, Lakes Pontchartrain and Maurepas are still showing up HAB free. All bluegreen in the frame here runs a consistent range of concentration from 500 to 800 thousand cells per ml. The impacted water bodies are the same we have been reporting on all year, from left to right, Lake Verret, Palourde and the Avoca Island Cutoff widespread HABs running 700 to 800 thousand cells per ml. Lac des Allemands, Bayou Fortier, Bayou des Allemdands large localized HABs running 600 to 700 thousand cells per ml. Lake Cataouache appears HAB free, Lake Salvador lakewide HAB 500 thousand cells per ml in open water, staying away from the shorelines. Bayou Perot widespread HAB 500 thousand cells per ml, and Black Bay widespread HAB 300 to 700 thousand cells per ml. See the latest satellite image of southeast LA water bodies, here.
Safe Drinking Water Advisories
Walnut Bayou Water System issued a boil advisory yesterday for customers connecting on the following roads: Senator Sevier, K.C. Ranch, Pemberton, Dahlia, Dunbar, Madden, 1105-3807 Hwy 603.
Lafourche Parish Water District No. 1 issued a boil water advisory yesterday for a portion of St. Charles and Raceland. This order affects communities between the St. Charles Bridge and the North Raceland Tank on both sides of Bayou Lafourche, until further notice.
Jackson Parish: Chatham Water System announced a boil water advisory until further notice. More to follow.
See Louisiana Drinking Water Facility Profiles, here.
See the latest Safe Drinking Water Act compliance stats for Louisiana here, including the US EPA list of serious violators.
Streamflow Situation from the network of USGS streamflow gauges in Louisiana
Another clear sunny day in New Orleans, the National Weather Service all quiet with no hazardous weather outlooks in effect for Louisiana. Checking in with the National Hurricane Center in Miami, FL Tropical Weather Outlook issued 8 am this morning, we see one item of interest for the Gulf.
Northwestern Caribbean Sea and Southern Gulf of Mexico:
A broad area of low pressure could form by the early to middle part of next week over the northwestern Caribbean Sea. Thereafter, gradual development of this system is possible, and a tropical depression could form as the system moves slowly to the north or northwest over the northwestern Caribbean Sea and into the southern Gulf of Mexico through the end of next week.
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 7 days...medium...40 percent.
The National Oceanographic and Atmospheric Administration (NOAA) has forecast a total of 17 to 25 named storms for 2024, including 4 to 7 Category 3 or higher hurricanes. According to the National Hurricane Center Forecaster Berg in the 8am announcement this morning, Gordon (previously a Tropical Depression) is down to "disorganized showers and thunderstorms more than a thousand miles southwest of the Azores. Due to strong upper-level winds, any additional development of this system is expected to be slow to occur while it meanders over the central subtropical Atlantic during the next couple of days." The chance of Gordon re-assembling around a core in the next 48 hours is 20 % or low. The probability of formation over the next seven days, also low.
A below normal rating has popped into Region 7 Friday, Comite River running below the 25th percentile or low end of normal. Normal to above seasonal normal flows are most common on the dashboard today, down to three stations still reporting above the 90th percentile and holding the much above normal rating. Region 3 is still in severe drought condition from the west border of East Carroll, Madison and Tensas Parishes. East Union, central Ouachita and Caldwell and north Catahoula Parishes continue with the below normal rating today. The rest of Louisiana surface area remains unrated on the drought map heading into the weekend. No extreme high flows or flooding is occurring in the reference network, no 1st percentile low flows.
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