Major Hurricane in New York...

[Astro_man92]

not sure

[Normandy]

I don't think any hurricane has even hit a city with a skyscraper and if a hurricanes has hit a city with a sky scraper I don't hink it was strong enough

Downtown Houston's buildings survived Alicia which had 90 mph winds while roaring through Houston (Probably Cat2-3 winds near the tops of the buildings)....they came nowhere near collapsing.

I seriously doubt New York's Skyscrapers would be completely leveled if a Cat3 hit.

[Astro_man92]

I don't think any hurricane has even hit a city with a skyscraper and if a hurricanes has hit a city with a sky scraper I don't hink it was strong enough

Downtown Houston's buildings survived Alicia which had 90 mph winds while roaring through Houston (Probably Cat2-3 winds near the tops of the buildings)....they came nowhere near collapsing.

I seriously doubt New York's Skyscrapers would be completely leveled if a Cat3 hit.

at the top of the sky scrapers the winds would be like 150-200MPH Idon't think they were built to handle those winds

[Normandy]

http://www.orange-beach-alabama.net/ima ... e-caps.jpg

Survived Hurricane Ivan, a Cat3 with 120 mph winds....no problem. Again, i HIGHLY doubt New York's skyscrapers would fail in a 130 mph hurricane.

[Astro_man92]

Umm FLIGHT LEVEL WINDS WILL BE MORE LIKLEY TO TIP) OVER A SKYSCRAPER THAN THE GROUND LEVEL WINDS????? 130 MPH winds are more likely to top over a sky scraper at thetop than the bottom

so most of the skyscrapers are more likey to tip over with flight level winds DUR

[WXFIEND]

As per WTC... there were 7 buildings... The Twin Towers and a third building fell on 9/11... there are 4 buildings left.

My dad works at 1 Penn Plaza near the Empire State Building and even in 50mph his building sways NOTICEABLY... but its made that way so it DOESNT fall.... but 130mph? I don't think so.... Even by 50 things are rolling across the desk.

[Astro_man92]

ok does every one get this aqt ground level in a hurricane lets say the winds are 100 mph at the lvl of the skyscrapers tops the wind is going to be =considerably graeter like 120 - 130

so 130 would translat to 150 - 160

[Normandy]

Umm FLIGHT LEVEL WINDS WILL BE MORE LIKLEY TO TIP) OVER A SKYSCRAPER THAN THE GROUND LEVEL WINDS????? 130 MPH winds are more likely to top over a sky scraper at thetop than the bottom

so most of the skyscrapers are more likey to tip over with flight level winds DUR

And what were the flight level winds in Hurricane Ivan? They WERENT 130 mph....they were higher....and that high rise had NO problem surviving it.

[Normandy]

:grr: ok does every one get this aqt ground level in a hurricane lets say the winds are 100 mph at the lvl of the skyscrapers tops the wind is going to be =considerably graeter like 120 - 130

so 130 would translat to 150 - 160

Do you know the force needed to snap a skyscraper and collapse it? They arent made of wood and nails.

And I get the equation...Ivan had 140+ flight level winds....not 120. I get it.

[Astro_man92]

k srry about that

[Patrick99]

I guess there's only one way to find out whether or not the NYC skyscrapers will fall. What about Boston? Couldn't Boston be hit in a similar fashion, from the south by a fast moving hurricane?

If I lived in Manhattan, I don't think I'd lose too much sleep over the possibility of a Cat. 3 or higher making a direct hit on the city. I don't doubt that the storm surge and general damage would be very bad....probably much, much worse than an equivalent storm hitting Florida, Carolina or a Gulf state.

It just doesn't seem as though it's likely to happen in any given lifetime.....whereas if I live in Florida, Carolina, Texas, Louisiana, MS, or Alabama, it's pretty likely that I will experience at least one major hurricane at some point in my life.

[mahicks]

As per WTC... there were 7 buildings... The Twin Towers and a third building fell on 9/11... there are 4 buildings left.

My dad works at 1 Penn Plaza near the Empire State Building and even in 50mph his building sways NOTICEABLY... but its made that way so it DOESNT fall.... but 130mph? I don't think so.... Even by 50 things are rolling across the desk.

Me thinks they would be ok

.....I guess I'm the only one on here that watches Engineering Marvels on the Discovery Channel.

BTW...Winds MUCH higher than 50 MPH happen EXTREMELY OFTEN at heights of sky scrapers.

[Hybridstorm_November2001]

I also do not think that the sky scrappers would be leveled in a cat. 3, maybe a cat 4 though (who knows).
I do know that many of the buildings in NYC did lose several panes of glass in the Super Storm of 1993. With that stated, I can only imagine the kind of mess a cat. 2 (or higher) hurricane would cause


Hybridstorm_November2001

[Normandy]

If what people here believe is true than every Cat3 that strikes a major city should level its skyline....ridiculous assumption imo.

[Astro_man92]

I guess there's only one way to find out whether or not the NYC skyscrapers will fall. What about Boston? Couldn't Boston be hit in a similar fashion, from the south by a fast moving hurricane?

If I lived in Manhattan, I don't think I'd lose too much sleep over the possibility of a Cat. 3 or higher making a direct hit on the city. I don't doubt that the storm surge and general damage would be very bad....probably much, much worse than an equivalent storm hitting Florida, Carolina or a Gulf state.

It just doesn't seem as though it's likely to happen in any given lifetime.....whereas if I live in Florida, Carolina, Texas, Louisiana, MS, or Alabama, it's pretty likely that I will experience at least one major hurricane at some point in my life.

why does it have to be moving fast

[WXFIEND]

yeah I know... I don't think 130mph would knock over skyscrapers like dominoes.

But honestly, a cat 3 in NYC would still be catastrophic, nevermind about the skyscrapers.

[Normandy]

I guess there's only one way to find out whether or not the NYC skyscrapers will fall. What about Boston? Couldn't Boston be hit in a similar fashion, from the south by a fast moving hurricane?

If I lived in Manhattan, I don't think I'd lose too much sleep over the possibility of a Cat. 3 or higher making a direct hit on the city. I don't doubt that the storm surge and general damage would be very bad....probably much, much worse than an equivalent storm hitting Florida, Carolina or a Gulf state.

It just doesn't seem as though it's likely to happen in any given lifetime.....whereas if I live in Florida, Carolina, Texas, Louisiana, MS, or Alabama, it's pretty likely that I will experience at least one major hurricane at some point in my life.

why does it have to be moving fast

Because if its up there its probably being scooted by a trough. Thats another flaw in the theory that the NYC skyscrapers would collapse....they would only expeirence the WORST of the winds for about 30 mins at the most.

I would be more inclined to think that if a Cat3 hit NYC, most of the windows would be blown out and the sidings of the buildings would suffer severe damage...with some portions of the inner structure gutted (near the tops of the high rises).

[Radar]

Normandy, no offense but i dont think it is a fair comparison to pit buildings along the Alabama coast line to the buildings in NYC. In Alabama they may have high rise buildings but they dont have the skyscrapers like NYC does. Also the tunnelling effect plays a large factor also and Alabama or even the Pensacola coast do not have the large concentration of skyscrapers or even high rise buildings in such a close proximation to one another. This is just an opinion, I'm not trying to dish on your proclaimation.

Here is an excerpt from an article written by a Frank Lepore of the National Hurricane prediction center. Also read some of the studies by a Professor Nicholas Coch he has done extensive research on the subject of the effects of hurricane on NYC also!

* Few high rise building windows in Manhattan are rated for a category
5 hurricane so the wind load on the glass would send it shattering
inward and cascading down to the streets. As the wind became more and
more compressed moving through the buildings, the channelization would
increase the wind velocity. This is known as the Venturi effect
("Bernoulli's theorem -sometimes called the Venturi effect- implies
that a decrease in fluid pressure is associated with an increase in
the fluid's velocity/speed. It's the basics for aircraft wing design
explaining that air flowing over the upper, curved part of the wing
moves faster than the air on the underside of the wing so that the
pressure underneath is greater and hence causes lift." - see
http://www.spartechsoftware.com/reeko/Glossary.htm). As the wind is
compressed faster and faster, the windows would be compromised and the
wind swirling inside the buildings would be, as Lepore put it, "like a
MixMaster." Lepore said that hallways should be safe because of few
or no windows. Also, the wind increases at higher elevations, too, so
marry that to the Venturi effect and the topmost residents of NYC
would be in the most dangerous situation.

[Hybridstorm_November2001]

why does it have to be moving fast

Because the storms usually get caught up in the upper level SW flow ahead of a strong frontal trough (the mid-latitude jet stream in other words) in most cases. This is why the average New England hurricane travels at 30mph once it hits about 40 N, and much faster (up to 60 mph) than that in some cases.


Hybridstorm_November2001

[Astro_man92]

Normandy, no offense but i dont think it is a fair comparison to pit buildings along the Alabama coast line to the buildings in NYC. In Alabama they may have high rise buildings but they dont have the skyscrapers like NYC does. Also the tunnelling effect plays a large factor also and Alabama or even the Pensacola coast do not have the large concentration of skyscrapers or even high rise buildings in such a close proximation to one another. This is just an opinion, I'm not trying to dish on your proclaimation.

Here is an excerpt from an article written by a Frank Lepore of the National Hurricane prediction center. Also read some of the studies by a Professor Nicholas Coch he has done extensive research on the subject of the effects of hurricane on NYC also!

* Few high rise building windows in Manhattan are rated for a category
5 hurricane so the wind load on the glass would send it shattering
inward and cascading down to the streets. As the wind became more and
more compressed moving through the buildings, the channelization would
increase the wind velocity. This is known as the Venturi effect
("Bernoulli's theorem -sometimes called the Venturi effect- implies
that a decrease in fluid pressure is associated with an increase in
the fluid's velocity/speed. It's the basics for aircraft wing design
explaining that air flowing over the upper, curved part of the wing
moves faster than the air on the underside of the wing so that the
pressure underneath is greater and hence causes lift." - see
http://www.spartechsoftware.com/reeko/Glossary.htm). As the wind is
compressed faster and faster, the windows would be compromised and the
wind swirling inside the buildings would be, as Lepore put it, "like a
MixMaster." Lepore said that hallways should be safe because of few
or no windows. Also, the wind increases at higher elevations, too, so
marry that to the Venturi effect and the topmost residents of NYC
would be in the most dangerous situation.

thnk oyu for explaining what i coulod not





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