Increased flood risk in Louisiana according to Invest 90-L

THE FUN STARTS TOMORROW. BUT AGAIN, WE'RE WATCHING THE FORECAST VERY CLOSELY ON THAT WARNING DAY BECAUSE THE BIG CONCERN IS LIGHTNING AND THAT'S GOING TO BE THE DECISIVE FACTOR IN WHETHER THE RACE WILL HAPPEN TOMORROW OR NOT, RIGHT? EXACTLY. AND WE'RE ALSO KEEPING AN EYE ON POTENTIAL FLOODING. YOU KNOW, THERE ARE NO FLOOD WARNINGS RIGHT NOW. WE HAVE THE FLOOD WARNING ON UNTIL SATURDAY MORNING JUST IN CASE. YOU KNOW, THERE MIGHT BE SOME FLOOD REGULATIONS OR FLOOD WARNINGS COMING INTO EFFECT. BUT RIGHT NOW THERE ARE NO ACTIVE ADVISORIES OR WARNINGS IN EFFECT. BUT WHAT IS ACTIVE RIGHT NOW IS THE WDSU FIRST WARNING DOPPLER WEATHER RADAR. BOY, THERE'S A LOT ACTIVE, ESPECIALLY ON THE SOUTH COAST WHERE WE'RE SEEING MOST, IF NOT ALL, OF THE RAIN HERE RIGHT NOW, ESPECIALLY IN THE YELLOW, ORANGE AND RED COLOR AREAS, THAT'S WHERE WE'RE SEEING MOST OF THIS HEAVY RAIN, ESPECIALLY FOR YOU GUYS DOWN TOWARDS GRAND ISLE, AND NOT TO MENTION UP TOWARDS GOLDEN MEADOW. LET'S GO A LITTLE FURTHER NORTH NEAR CUT OFF. THERE'S VERY HEAVY RAIN FALLING THERE DURING THE PERIOD. LOCKPORT, RACELAND HOUMA, AND FINALLY UP TOWARDS THIBODAUX, A LITTLE CLOSER TO THE METRO. WE'RE SEEING A LITTLE LIGHTER RAIN DURING THE PERIOD, BUT WE'RE SEEING SOME HEAVIER SINGLES HERE AND THERE, SOME SPOKEN ACTIVITY WHERE YOU SEE THE YELLOW SHADOWS ON THE RADAR. THAT INDICATES MODERATE RAINFALL. THE DAUSEWAY LOOKS A LITTLE LIGHT RIGHT NOW AS PER RAIN TOWARDS MANDEVILLE. THERE'S A LITTLE LIGHT ACTIVITY THERE, BUT AGAIN, NO FLOOD WARNINGS. THAT'S THE GOOD NEWS WE CAN OFFER AT THIS TIME. BUT THERE ARE SOME SPECIAL WARNINGS FOR SEA ICING JUST OFF THE COAST BECAUSE OF THE HEAVY RAIN AND SOME GUSTY WINDS THAT ARE ACCOMPANYING SOME OF THESE CELLS. HERE'S A LIVE SATELLITE AND RADAR LOOK FOR THE LAST SIX HOURS. REALLY VERY CHAOS. SINCE THIS MORNING, CONTINUING FROM YESTERDAY. AND YOU CAN SEE IN THE BIGGER PICTURE THAT WE ARE WATCHING THE LOW PRESSURE AREA IN THE WESTERN GULF OF MEXICO. AT THE SAME TIME IT'S ALSO INTERACTING WITH A NEARLY STATIONARY FRONTAL BOUNDARY. SO THAT'S A BIG WEATHERMAKER THAT WE'RE GOING TO HAVE TO DEAL WITH. AND THE NATIONAL HURRICANE CENTER IS STILL STUDYING THIS SYSTEM. IT'S INVEST 90 L, IT HAS A 10% CHANCE OF DEVELOPING IN THE NEXT TWO DAYS AND ALSO IN THE NEXT SEVEN DAYS, BUT THE CHANCES ARE VERY SLIM. REGARDLESS OF HOW IT DEVELOPS, IT'S NOT EXPECTED. IT'S STILL GOING TO BRING US WET WEATHER. SO WE'RE STILL UNDER THAT FLOODING. Watch for southeast Louisiana until 7:00 a.m. tomorrow morning. Again, there's a moderate level three flood risk for that area. And we'll have to keep a close eye on that as more rainfall accumulates. And maybe some flood advisories and warnings will be issued. But here we go: Around 4:00, the low pressure system will continue to move in our direction and spread the wet weather and heavy rain across the area today and also tonight. And it will continue like that until tomorrow morning. AND UNFORTUNATELY, IT LOOKS LIKE IT'S GOING TO BE ANOTHER WET DAY ALL DAY LONG, AS IT MAY BE AS WE MOVE INTO THE REST OF SATURDAY MORNING AND INTO SATURDAY AFTERNOON AS WELL. BUT AGAIN, THE HEAVIER RAIN, IT LOOKS LIKE IT'S GOING TO STAY OFF COAST. WE'LL JUST SEE SOME SPOKEN ACTIVITY WITH SOME HEAVIER RAIN ALL DAY, AND BEFORE SUNDAY COMES, YOU CAN SEE WE'LL SEE A LITTLE BREAK HERE AS WE MOVE INTO SUNDAY MORNING. AS THIS SYSTEM STARTS TO CLEAR THE AREA, AND ANOTHER FRONTAL BOUNDARY MOVES IN FROM THE NORTH TO MOVE IT LIKE THAT. BUT THE 7-DAY FORECAST TRENDS STILL LOOK PRETTY HIGH, ESPECIALLY AS WE HEAD INTO NEXT WEEK, WEDNESDAY AND THURSDAY. UP TO 90%. AND ON FRIDAY, ABOUT 70%. SO WE'LL SEE A BREAK IN THE RAIN HERE AS WE HEAD INTO SUNDAY. NEXT WEEK THE RAIN CHANCE CONTINUES. 2 TO 4 ADDITIONAL RAINFALL COLLECTIONS INLAND, BUT I THINK THE HIGHER TOTALS ALONG THE DIRECT COAST, 5 TO 8 INCHES OR MORE, MAY RESHAPE THE TROPICS. NOT A LITTLE ACTIVE. WE HAVE SOME AREAS WE'RE WATCHING, OVERALL LOW DEVELOPMENT CHANCES. WDSU FIRST ALERT, 7-DAY FORECAST FOR RAIN CHANCES

4 Disturbances are monitored for possible development

3 areas have a low chance of development over the next seven days, while the southwestern Gulf has a medium chance

Updated: 1:40 p.m. CDT, September 6, 2024

The WDSU First Warning Weather team is currently monitoring four disturbances for possible development. A new area the National Hurricane Center is closely watching is in the northwestern Gulf of Mexico. It has now defined this system as Invest 90-L so we can get high-resolution tropical computer forecast data. A low pressure system is producing showers and thunderstorms. This will bring heavy precipitation to Texas and Louisiana. More rain is unlikely to develop, but it will still bring enough precipitation to fear flooding. 3 to 5 inches of rain is expected over the next three days. There is a 10 percent chance of development over the next two and seven days. A tropical wave is producing disorganized thunderstorms and gusty winds in parts of the central Caribbean. Some development is possible as it moves into southern parts of the Gulf of Mexico next week. We will be watching closely how it is affected by the cold front moving into the Gulf of Mexico over the weekend. The National Hurricane Center (NHC) gives this system a medium probability, a 40 percent chance of forming in the next seven days. The NHC is monitoring a tropical wave currently in the Mid-Atlantic. This system has a 10 percent chance of forming in the next seven days. It will not impact southeast Louisiana. One final area has been staked out just off the Mid-Atlantic coast of the U.S. This is for a common storm system that could strengthen and take on tropical characteristics as it moves over the Gulf Stream. It has been rated low probabilities, a 0 percent chance of forming in the next two and seven days respectively. This storm will move off the coast of the Northeast U.S. and poses no threat to Louisiana. Stay with the WDSU First Warning Weather Team for all the latest tropical forecast updates.

WDSU's First Warning Weather team is currently monitoring four disturbances for possible development.

A new area that the National Hurricane Center is closely monitoring is located in the northwest Gulf of Mexico. This system has now been defined as Invest 90-L so that we can get high-resolution tropical computer forecast data. A low pressure system is producing showers and thunderstorms. This will bring heavy rains to Texas and Louisiana. More rain is unlikely to develop, but it will still bring enough rain to cause flooding concerns. 3 to 5 inches of rain are expected over the next three days.

There is a 10 percent chance of development in the next two and seven days.

A tropical wave is producing disorganized thunderstorms and gusty winds across parts of the central Caribbean. Some development is possible as it moves into the southern parts of the Gulf of Mexico next week. We will be watching closely how it is affected by the cold front moving into the Gulf of Mexico over the weekend.

The National Hurricane Center (NHC) gives this system a medium probability, meaning a 40 percent chance of developing within the next seven days.

The NHC is monitoring a tropical wave currently located in the Central Atlantic. This system will strengthen by 10% within the next seven days. It will not impact southeast Louisiana.

A final area has been identified just off the Mid-Atlantic coast of the United States. This is a common storm system that could strengthen and acquire tropical characteristics as it moves over the Gulf Stream. The probability of its formation has been assessed as low, i.e. 0% probability over the next two or seven days. This storm will move off the coast of the Northeastern United States and poses no threat to Louisiana.

Stay with the WDSU First Warning Weather Team for the latest tropical forecast information.