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MCMLXXXII t1_j1hwuqq wrote

The usual reason for coastal flooding is low atmospheric pressure. We might not even think of it but air has mass and it is usually weighing down on the oceans and keeping it compressed. The air when there is low pressure is less dense so there is less weight pushing down on the seas. This causes the previously compressed water to expand and that is why the sea level rises slightly. This is most notable during times of hurricanes as they are very large low pressure systems.

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fruit__gummy t1_j1i6ukz wrote

I’m not sure the water “decompresses”, I think it’s more like, higher pressure regions of the ocean push up lower pressure regions of the ocean. Think hydraulic pistons etc.

Water is pretty incompressible. If it wasn’t, a gallon of water at the bottom of a swimming pool would weigh more than a gallon from the top, but this isn’t actually true in real life

So water isn’t actually “expanding”, it’s just being pushed up by regions of the ocean with higher atmospheric pressure

I could be wrong but this is my understanding

Edit: actually pretty much every part of your comment is wrong lmao. Why do you speak with such authority on things you have no clue about

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HElGHTS t1_j1kyc6d wrote

I think the parent comment is using "compressed" to mean "being forced elsewhere" as opposed to the more typical "being forced into having less volume" which would be exactly what you're also saying. I don't condone imprecise language but I'll give the benefit of the doubt because it's pretty intuitive that water is hardly compressible.

Think about using a compression bandage or compression socks. You're not literally compressing, you're just squeezing the flesh and it goes elsewhere.

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fruit__gummy t1_j1l5129 wrote

I think OPs use of the word “expand” means they were using your second definition of compress. Also don’t compression bandages cause your veins to compress/reduced cross sectional area?

Also they are just straight up wrong about this being the cause of the flooding, as other commenters have pointed out

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nasty_brutish_longer t1_j1i6xf2 wrote

Sort of. High pressure areas of a storm can "bulge" seas into low pressure areas, but most surge force by far is from wind moving in the same direction.

Atmospheric pressure is absolutely a thing on this planet, but the difference between typical high and low pressure systems isn't that great compared to the total mass of air.

*Edited to add link and remove "compress." As another poster points out, water is essentially incompressible.

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HudsonRiverMonster t1_j1iulcb wrote

Confidently wrong. It rained and snowed a lot, this is storm water from the Hudson Valley flowing out into the sea. Combined with the tides, that drives up the river level much more than a dip in atmospheric pressure. This isn’t a tropical storm, and that’s not how tropical storms cause storm surge anyway.

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_switch360_ t1_j1kezht wrote

Hey the Science guy wanted to sound smart about decompression of water to impress the chicks.

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_switch360_ t1_j1iapgy wrote

Or the torrential rain that caused extensive runoff up river because of the snow melt.

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The_Nomadic_Nerd t1_j1hp6q2 wrote

Can somebody explain why we’re getting floods? The weather report said it was just 1.8 inches of rain, yet we’re getting floods.

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TiredOfMakingExcuses t1_j1hqh7z wrote

Timing of the rain combined with timing of high tide. If the tides are high, it's harder for the pumps to clear the water out

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objectimpermanence t1_j1hqqbk wrote

I would guess it’s probably strong winds combined with a rising tide. Plus maybe storm water draining into the river from upstream?

High tide is at 8:38am and 9:14pm today according to this.

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KustyTheKlown t1_j1j0nze wrote

lol 'just' 1.8 inches of rain

if it were cold enough 1.8 inches of rain is like 2 feet of snow. that's a shitload of water to fall from the sky in a short period.

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DirectorBeneficial48 t1_j1iezmx wrote

That's a lot of rain. Tons and tons of water. That's about 22 inches of snow, for comparison's sake.

Now understand that if you put out a bucket to capture rain water and got 1.8", everywhere got 1.8". The river got 1.8". All of the land next to it got 1.8". All of the land higher up got 1.8". All of the land further upriver got 1.8". All of the land at higher elevation upriver got 1.8".

Now do you get it?

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Desi_techy_girl OP t1_j1hpgse wrote

Just a guess, somewhere it is raining or snowing and all of that is adding water to Hudson which is coming down to us and it’s overflowing.

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scubastefon t1_j1i642e wrote

That’s right. This town is at the end of the Hudson, and every drop of water from the Adirondacks, down through the Valley and onwards passes by it.

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mikeyterp t1_j1htyot wrote

It's not even close at the moment. Was just at semicolon

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bodhipooh t1_j1iobqe wrote

This is fear mongering, plain and simple.

There was never any danger or risk of the flooding DTJC. This picture was taken shortly before high tide. A few hours later the water had receded enough that you could see the rocks along the waterfront sea wall.

This “overflowing” lasted a whole lot of a couple of hours and this was the extent of it.

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cC2Panda t1_j1l5eth wrote

Is it flooding further into Paulus Hook. Left my car there before going to family for the holiday, wondering if I should worry about my car.

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MarketMan123 t1_j211pbj wrote

And this is why it was great to rent in downtown JC, but I would never in a million years have bought there...

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FinalIntern8888 t1_j1mgh6h wrote

Looks like my spot in McGinley Sq will be waterfront property in 5 years

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lukasbarton t1_j1hq8o2 wrote

So you took someone else's photo from NextDoor from yesterday to try and farm some karma off of it here? https://imgur.com/a/bWXrRXQ

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Desi_techy_girl OP t1_j1hv9tc wrote

I was sent this on WhatsApp and I put it on here so that more people can know about it.

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jerseycityfrankie t1_j1i4frc wrote

Seriously? Fear monger Karma farming?

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Ilanaspax t1_j1igiho wrote

Newport is so boring/fragile that a fire truck generated two posts in this sub …. are you really that surprised?

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Benkrunk t1_j1i9g1f wrote

Bruh chill

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jerseycityfrankie t1_j1iahne wrote

Who puts up a day old photo of some alarming thing potentially effecting us all, which they didn’t take and passes it off as “today”?

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