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Author Topic:   To our members in the Caribbean hunker down; if in Florida head north..
kjsimons
Member
Posts: 647
From: Orlando,FL
Joined: 06-17-2003


Message 46 of 53 (819547)
09-12-2017 2:14 PM
Reply to: Message 44 by xongsmith
09-12-2017 2:06 PM


Re: Hurricane Size Comparison
LOL, I watched the video twice and didn't pay attention to that and I just went through hurricane Irma!
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Diomedes
Member
Posts: 662
From: Central Florida, USA
Joined: 09-13-2013
Member Rating: 4.7


(1)
Message 47 of 53 (819551)
09-12-2017 2:33 PM
Reply to: Message 46 by kjsimons
09-12-2017 2:14 PM


Re: Hurricane Size Comparison
Me neither.

What's even funnier is that when you look at the hurricane formations, you can clearly see they are meant for counter-clockwise rotation, based on the cloud bands. But the animation has them going clockwise!

See, this is what happens when you give the important work to interns!


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Pressie
Member
Posts: 1771
From: Pretoria, SA
Joined: 06-18-2010
Member Rating: 3.1


(1)
Message 48 of 53 (819581)
09-13-2017 6:19 AM
Reply to: Message 45 by Diomedes
09-12-2017 2:13 PM


Re: Hurricane Size Comparison
Actually, around one in a hundred hurricanes or cyclones or typhoons or whatever you call it hitting land in the northern hemisphere rotates clockwise. Maybe it is because the original storm started just south of the equator?

It's Yuge!

Edited by Pressie, : No reason given.

Edited by Pressie, : No reason given.

Edited by Pressie, : No reason given.

Edited by Pressie, : No reason given.


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Aussie
Member
Posts: 120
From: Sanford, FL USA
Joined: 10-02-2006
Member Rating: 2.7


Message 49 of 53 (819610)
09-13-2017 10:51 AM
Reply to: Message 48 by Pressie
09-13-2017 6:19 AM


Re: Hurricane Size Comparison
Actually, around one in a hundred hurricanes or cyclones or typhoons or whatever you call it hitting land in the northern hemisphere rotates clockwise. Maybe it is because the original storm started just south of the equator?

This is hardly worth a nitpick, but I can't bring myself to believe this.

Coriolis effect doesn't care where you START, it only cares where you CURRENTLY are. Winds originally deflected to the left in the Southern hemisphere start a deflection to the right as they begin to pass some distance North of the Equator.

I'm not an Atmospheric physicist, and could be wrong but...
If you are correct in this I'd love to see some supporting info if you could provide it. An initial google search isn't helping me here. Thanks!


"...heck is a small price to pay for the truth"

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NoNukes
Member
Posts: 9928
From: Central NC USA
Joined: 08-13-2010
Member Rating: 3.2


(1)
Message 50 of 53 (819632)
09-13-2017 4:21 PM
Reply to: Message 49 by Aussie
09-13-2017 10:51 AM


Re: Hurricane Size Comparison
Coriolis effect doesn't care where you START, it only cares where you CURRENTLY are.

Yes, but the Coriolis effect is important during the birth of the storm. Beyond that, the implication of your statement is that cyclones and hurricanes reverse direction as they cross the equator. I don't believe that is the case.


Under a government which imprisons any unjustly, the true place for a just man is also in prison. Thoreau: Civil Disobedience (1846)

I was thinking as long as I have my hands up … they’re not going to shoot me. This is what I’m thinking — they’re not going to shoot me. Wow, was I wrong. -- Charles Kinsey

We got a thousand points of light for the homeless man. We've got a kinder, gentler, machine gun hand. Neil Young, Rockin' in the Free World.

Worrying about the "browning of America" is not racism. -- Faith

I hate you all, you hate me -- Faith


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Replies to this message:
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Aussie
Member
Posts: 120
From: Sanford, FL USA
Joined: 10-02-2006
Member Rating: 2.7


Message 51 of 53 (819731)
09-14-2017 10:57 AM
Reply to: Message 50 by NoNukes
09-13-2017 4:21 PM


Re: Hurricane Size Comparison
Yes, but the Coriolis effect is important during the birth of the storm. Beyond that, the implication of your statement is that cyclones and hurricanes reverse direction as they cross the equator. I don't believe that is the case.

Hey NoNukes, This is correct but also incomplete. Coriolis is important during the formation of any any pressure system, High or Low, but together with other factors (Pressure Gradient Force, speed of rotation of the planet, rate of movement of the air mass, etc. remains a dominant effective force throughout the entirety of the system's life cycle.

The strength of Coriolis varies with the Sine of the latitude and is effectively zero at the Equator. Straightline winds can and certainly do change direction as they cross the equator. For example, the SouthEAST Trade winds in the Southern Hemisphere become the SouthWEST Monsoon winds that blow over much of western Africa in the Northern Hemisphere. They annoyingly help generate massive clusters of thunderstorms that drift west off the African coast as Easterly Waves that often become these tropical revolving storms.

But during their passage across the Atlantic, Coriolis deflects the entire system to the right (in the Northern Hemisphere), usually in conjunction with the Bermuda High (Clockwise rotation). So because of Coriolis you will almost inevitably see Tropical revolving systems move AWAY from the equator, not towards it. In the very rare event that a tropical revolving system is forced across the Equator, it would be more likely that the revolving motion would be entirely dampened.

Again, I'm not a real Meteorologist, and could be wrong, but I don't think I am in this case.


"...heck is a small price to pay for the truth"

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NoNukes
Member
Posts: 9928
From: Central NC USA
Joined: 08-13-2010
Member Rating: 3.2


Message 52 of 53 (820061)
09-16-2017 9:46 AM
Reply to: Message 51 by Aussie
09-14-2017 10:57 AM


Re: Hurricane Size Comparison
Hey NoNukes, This is correct but also incomplete. Coriolis is important during the formation of any any pressure system, High or Low, but together with other factors (Pressure Gradient Force, speed of rotation of the planet, rate of movement of the air mass, etc. remains a dominant effective force throughout the entirety of the system's life cycle.

I agree with you. But I am suggesting that the place of origin does have a lot to do with the direction in which the storms spin. I wasn't trying to address anything else.


Under a government which imprisons any unjustly, the true place for a just man is also in prison. Thoreau: Civil Disobedience (1846)

I was thinking as long as I have my hands up … they’re not going to shoot me. This is what I’m thinking — they’re not going to shoot me. Wow, was I wrong. -- Charles Kinsey

We got a thousand points of light for the homeless man. We've got a kinder, gentler, machine gun hand. Neil Young, Rockin' in the Free World.

Worrying about the "browning of America" is not racism. -- Faith

I hate you all, you hate me -- Faith


This message is a reply to:
 Message 51 by Aussie, posted 09-14-2017 10:57 AM Aussie has not yet responded

    
Phat
Member
Posts: 9767
From: Denver,Colorado USA
Joined: 12-30-2003
Member Rating: 1.7


Message 53 of 53 (820354)
09-19-2017 1:21 PM


How Do You Solve A Problem Like Maria?
A new one is now a category 5:
Potentially Catastrophic' Hurricane Maria Devastates Dominica, Heads For Puerto Rico

Chance as a real force is a myth. It has no basis in reality and no place in scientific inquiry. For science and philosophy to continue to advance in knowledge, chance must be demythologized once and for all. –RC Sproul
"A lie can travel half way around the world while the truth is putting on its shoes." –Mark Twain "
~"If that's not sufficient for you go soak your head."~Faith
"as long as chance rules, God is an anachronism."~Arthur Koestler

  
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