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re: What would be the worst place in Louisiana to get hit by a major flash flood?
Posted on 7/6/25 at 3:32 pm to Chastains
Posted on 7/6/25 at 3:32 pm to Chastains
Anyplace with real topography or super low elevation relative to the surroundings. In most areas of South LA, excessive rainfall can accumulate in and around towns, but with time, pretty reliably drains towards back swamp. When you start getting into Florida Parishes or places with excess human intervention in water management (e.g., New Orleans) you can run into big problems due to a combo of topography or system failures.
0
Posted on 7/6/25 at 3:35 pm to CuseTiger
quote:
New Orleans
Pretty much all weather conditions.
Posted on 7/6/25 at 3:35 pm to LSU Neil
quote:
24 inches fell on May 8-9 1994, in New Orleans.
1995
Posted on 7/6/25 at 3:52 pm to Chastains
quote:
Out of all the places in Louisiana what would be the last place you would want to be if 12" inches rain fell in a day?
12"?
In 2016 southeast Louisiana got up to 30 inches of rain in 2 days.
August 2016 Record Flooding
A slow moving upper level low pressure system with a pool of very deep tropical moisture brought very heavy rainfall of 20 to 30 inches to parts of Southeast Louisiana and Southwest Mississippi from August 11th through August 13th. These very heavy rainfall totals led to widespread flash flooding and record river flooding across multiple parishes in Southeast Louisiana and Southwest Mississippi.
Record flooding was observed in Amite/Comite River Basin, Tickfaw River Basin, Natalbany River Basin, and the Tangipahoa River Basin. The flooding led to interstate closures on both Interstate 10 and 12 for several days, and flooded thousands of homes and businesses across portions of the Baton Rouge and Hammond Metropolitan Areas. A final tally of the number of homes and businesses flooded has not been compiled, but estimates range from 50,000 to 75,000 structures flooded from this event. The most widespread flooding impacted large portions of highly populated East Baton Rouge, Livingston, Ascension, and Tangipahoa Parishes.
The event also resulted in numerous water rescues and unfortunately there were 13 people killed from the flooding in the state. 12 of those deaths occurred in the Baton Rouge and Hammond areas.
LINK
But the real flood threat to southeast Louisiana is a combined snowmelt combined with a high spring rainfall in the Ohio River Valley.
Posted on 7/6/25 at 3:57 pm to Harry Boutte
That shite in 2016 was crazy but like people have said if you have half a lick of sense around here even in 2016 you could save your own life and your family fairly easily. Property loss is a bitch but eventually it can come back.
This shite in Texas I don’t think a lot of these people that died ever had a chance…..it’s just fricking insanely sad!
This shite in Texas I don’t think a lot of these people that died ever had a chance…..it’s just fricking insanely sad!
Posted on 7/6/25 at 3:59 pm to Chastains
It has to be New Orleans, simply because It would not drain naturally; It would (and has) need to be pumped.
Posted on 7/6/25 at 4:00 pm to LSU316
All of south la is vulnerable to flooding and if you think you are safe you are mistaken
I agree, at least you will have time to get to safety before it gets too bad
I agree, at least you will have time to get to safety before it gets too bad
Posted on 7/6/25 at 4:15 pm to CuseTiger
quote:
New Orleans
I mean, logistically speaking only, New Orleans would be one of the better locations. Water has no where to go so it won’t be moving. Just getting deeper. This wouldn’t be storm surge related like Katrina, so you’d like to think people could react. Now I’m not counting all the other crazy shite that would happen or the process of getting the water out, but you wouldn’t see a situation like what’s happening in Texas where the water rose so fast and with almost no warning.
This post was edited on 7/6/25 at 4:16 pm
Posted on 7/6/25 at 4:24 pm to Chastains
I could only image how bad it would be in downtown Monroe if it got hit with that much rain at the wrong time.
There are times when the Ouachita is high as shite and adding 10-12 inches in a 24hr period could be a problem(especially if there was heavy rainfall elsewhere flowing into the Ouachita at the same time).
They already seem to have pump issues and areas of north and south Monroe already flood with above avg rainfall.
There are times when the Ouachita is high as shite and adding 10-12 inches in a 24hr period could be a problem(especially if there was heavy rainfall elsewhere flowing into the Ouachita at the same time).
They already seem to have pump issues and areas of north and south Monroe already flood with above avg rainfall.
Posted on 7/6/25 at 4:32 pm to Chastains
New Orleans because of the criminal element that lives there. It’s not like Texas where these people are helping each other.
Posted on 7/6/25 at 4:39 pm to LSU Neil
quote:was 94 a flood year for everyone? I live 3 or 4 states over but we had the great floor of 94 here. Looking back, I didn't know how my house or other family, lived quarter mile down the road, didn't get flooded out as we lived at the bottom of a hill. But other parts of our county got devastated. I was only a child but it was something serious.
1994,
Posted on 7/6/25 at 4:46 pm to LSU Neil
Yeah that was in 95... I was at my parents house and it never ever came close to flooding there.. The house is on a ridge and the water came down the street with such force that it made it over the ridge like a rapids... It was a sight...
Posted on 7/6/25 at 4:51 pm to Chastains
Didn’t this shite happen in 2016 I know there was major flooding in Baton Rouge and surrounding areas like O’Neal rd, Dunham springs, etc…..it’s wasn’t hrs but days that people could prepare but it was still major flooding
This post was edited on 7/6/25 at 4:53 pm
Posted on 7/6/25 at 4:51 pm to nicholastiger
quote:
What these storms did in Texas and Tenn/nc won’t happen like that in La
We don’t have that kind of buildup and runoff
Elevation changes in the hill country in Texas and much of Tennessee and North Carolina are what create those problems. You have rapid drainage into one area from multiple directions.
quote:
Now backwater flooding is another story in La
Yep but that's a slow rise relative to the flash floods you saw in Texas. It's painful to watch it slowly creeping up toward your house, but you have time to properly react, at least.
Posted on 7/6/25 at 4:55 pm to Chastains
LA/MS but Tunica/Clarks Creek.
Posted on 7/6/25 at 4:57 pm to Tarps99
quote:
SELA the water rises slowly with the rain.
Other places the rain will collect in streams and create flash floods along the rivers.
Ask the Northshore about this. In the 2016 flood, the Bogue Falaya rose and was in people's houses in a matter of minutes.
Posted on 7/6/25 at 5:06 pm to Locoguan0
But New Orleans now has the pumps, 24 pumping stations, that can handle that.
1st hour 1 inch, then 1/2 inch every hour.
So 12 inches in 24 hours would be no flooding.
1st hour 1 inch, then 1/2 inch every hour.
So 12 inches in 24 hours would be no flooding.
Posted on 7/6/25 at 5:09 pm to TigerintheNO
quote:
So 12 inches in 24 hours would be no flooding.
Posted on 7/6/25 at 5:20 pm to CuseTiger
quote:
New Orleans
AKA a bowl of land surrounded by water just waiting to be filled.
Posted on 7/6/25 at 5:42 pm to Chastains
Jazzland.
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