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re: Where did all the water that caused the Mystic River flooding come from?

Posted on 7/6/25 at 8:12 pm to
Posted by BigBinBR
Baton Rouge
Member since Mar 2023
9342 posts
Posted on 7/6/25 at 8:12 pm to
quote:

That's a normal occurrence?


It’s not “normal” but not exactly uncommon either.

It flash floods in that area a good bit and it’s all due to topography.

For a simplistic explanation, if you get 4” of rain across flat terrain then you have 4 inches spread evenly across the ground.

Now if you have 4” of rain across an entire hill then the water runs downhill and pools at the bottom (and basically no water stays in the top of the hill). The water increases exponentially at the bottom of the hill.

Now if you have multiple hills in the area along with hills on both sides of the river, you can get crazy flash flooding.



Posted by djsdawg
Member since Apr 2015
39813 posts
Posted on 7/6/25 at 8:13 pm to
quote:

To this magnitude? I just got done watching a video and the river rose by 16 ft in 8 minutes. That's a normal occurrence?


It very well could be a normal one on a scale of millennia
Posted by HighRoller
Baton Rouge
Member since Nov 2011
5409 posts
Posted on 7/6/25 at 8:17 pm to
quote:

help me understand where the 20 feet of water that caused the catastrophic flooding on the Mystic River came from


If you’re ever curious about the downfall of America just realize these are the people out there voting. Have no clue how heavy rainfall works.
Posted by Sal Minio
17th Street Canal
Member since Sep 2006
4431 posts
Posted on 7/6/25 at 8:25 pm to
quote:

You can’t really blame macro climate change on specific climate events. The climate change angle would be if this happened yearly for enough time to be a trend rather than a once a generation flood.


Touche!
Posted by Victor R Franko
Member since Dec 2021
2268 posts
Posted on 7/6/25 at 8:27 pm to
To this magnitude? Yes, I read that the river rose 26ft. In 45 minutes. As The Baker stated above your post, this called a flash flood. Could be raing 100 miles up river in the afternoon and show up in narrow river basin at night, 26ft. Of water coming and hauling arse. I'm almost 65 and lived in Central Texas all this time. Seems like every decade or so something like this happens. Many times it's people trying to vehicle cross in low areas. There is a lot of limestone rock and hard ground in the western southwest part of the hill country, Kerrville area. When strong rain comes it's like a horse pissing on a flat rock in August!
Posted by HubbaBubba
North of DFW, TX
Member since Oct 2010
50963 posts
Posted on 7/6/25 at 8:30 pm to
quote:

It rained.

That area has had flooding for thousands of years.
I hate that late that evening before midnight we were watching the weather report and I said to my wife, "this is going to be one of those rains where someone drowns in a flood." It happens so regularly, it doesn't make sense that it still happens, but I have a son, daughter and daughter-in-law in hill country. You better bet that their mother and me pay attention, just like when they went off to college. Back to the topic, though, it's like nearly every year here in the DFW area there's at least one drowning death in either Lake Grapevine, Lake Lewisville or Lake Ray Hubbard every Memorial Day, 4th of July and Labor Day. It's expected and why we don't go out on holidays around here. Too many idiots that never took a boating safety course or learned CPR. Same goes for Texas South of Austin and West of San Antonio. Rain comes in from a low out of the Gulf and settles in. People die and it leaves a mess.
Posted by Luke
1113 Chartres Street, NOLA
Member since Nov 2004
14136 posts
Posted on 7/6/25 at 8:34 pm to
Terrible event…
This post was edited on 7/6/25 at 8:45 pm
Posted by BigoBoys
Arizona
Member since Aug 2019
721 posts
Posted on 7/6/25 at 8:45 pm to
OMG
Posted by TigerAxeOK
Where I lay my head is home.
Member since Dec 2016
35618 posts
Posted on 7/6/25 at 8:59 pm to
quote:

Can someone please help me understand where the 20 feet of water that caused the catastrophic flooding on the Mystic River came from. 

According to Rosie O'Donnell, Trump. The rain came from Trump. I cannot wrap my head around the logic she used to come to that conclusion, but the answer is that simple nonetheless.
Posted by ItTakesAThief
Scottsdale, Arizona
Member since Dec 2009
10337 posts
Posted on 7/6/25 at 9:07 pm to
It’s not normal for a house to get pegged by a F5 tornado.

It’s a low probability it will happen to any single property. But sometimes someone’s number comes up.


Same with a heavy rain parking over a very bad spot at a very bad time. Unfortunately it happens sometimes.
Posted by tigger1
Member since Mar 2005
3749 posts
Posted on 7/6/25 at 9:12 pm to
quote:

To this magnitude? I just got done watching a video and the river rose by 16 ft in 8 minutes. That's a normal occurrence?


Yes always, only a few years ago it happened in Arkansas killing over 10 if I remember correct.

Same scenario, campground on the river, rained a large amount during the night, the water rose near 11 feet in the night; killing many.

The water coming from higher ground going downhill can cause water to raise well over 10 feet in less than 3 minutes.
Posted by TheBeezer
Texas
Member since Apr 2013
1979 posts
Posted on 7/6/25 at 9:19 pm to
I live all the way up here in Collin County and even we've been getting a lot of rain for the past week for this time of year. Usually its already as dry as a bone.
Posted by Neutral Underground
Member since Mar 2024
2753 posts
Posted on 7/6/25 at 9:21 pm to
Scary sh!t. I have been seeing reports that the Camp got Warnings about Flooding hours before the actual event. Are all these deaths a case of human error? Deciding not to take the Flood Warning seriously?
Posted by TigerAxeOK
Where I lay my head is home.
Member since Dec 2016
35618 posts
Posted on 7/6/25 at 9:35 pm to
quote:

Same with a heavy rain parking over a very bad spot at a very bad time. Unfortunately it happens sometimes.

The people of Western NC and Eastern KY certainly found this out the hard way too. Sometimes, you're just unlucky and the weather does uncharacteristic but not unprecedented things.

The flooding along that river in TX was the second highest in recorded history. But that just shows it has happened before, and worse.

Sometimes, nature reminds us she's in charge, and unfortunately it's always tragic. And your comment about EF5 tornadoes hits home, because I live in the dead center bullseye of tornado alley. I know my number will be up one day.
Posted by Kattail
Member since Aug 2020
4140 posts
Posted on 7/6/25 at 9:40 pm to
Remnants of tropical storm Barry that made landfall in Mexico’s west coast that stalled out over central Texas
Posted by Neutral Underground
Member since Mar 2024
2753 posts
Posted on 7/6/25 at 9:49 pm to
quote:

Tropical Storm Barry


Thanks man. I wasn't aware of storm. Some people were saying that a dam broke and others that it was from cloud seeding. That is why I asked.
Posted by Grumpy Nemesis
Member since Feb 2025
2033 posts
Posted on 7/6/25 at 9:52 pm to
quote:



To this magnitude? I just got done watching a video and the river rose by 16 ft in 8 minutes. That's a normal occurrence

No dummy. It's not normal. It happened all the time they wouldn't have built stuff there. Don't confuse normal with possible.
Posted by Neutral Underground
Member since Mar 2024
2753 posts
Posted on 7/6/25 at 10:00 pm to
quote:

No dummy


::In caveman's voice::

Me big dum-dum. Me make people big mad, when I ask question to not to be big dum-dum. Me thinks they call me dummy to make themselves feel superior. But me big dum-dum. Me Don't understand where this unwarranted hostility is coming from.
Posted by dovehunter
Baton Rouge
Member since Sep 2014
1724 posts
Posted on 7/6/25 at 10:02 pm to
It's just a terrible natural disaster. It can happen at the worst possible time and this time it did. Maybe if it had happened in September and all the kids were back in school and nobody was camping there, nobody would have been lost.

It's sad, a natural disaster and it's hard to blame anybody. Would it be better to never camp close to a potential flood zone? Yes, but life is full of risks.
Posted by Bluff4Life
Moss Bluff, LA
Member since Jan 2022
67 posts
Posted on 7/6/25 at 11:31 pm to
It developed in the Pacific and was a named storm Barry.
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