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wxmann_91
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#481 Postby wxmann_91 » Mon Aug 08, 2005 6:29 pm

Please disregard this post. Thanks! :D
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#482 Postby Ivanhater » Mon Aug 08, 2005 6:34 pm

im looking at visible, has the center died out??

http://hadar.cira.colostate.edu/ramsdis ... at2_0.html
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#483 Postby Astro_man92 » Mon Aug 08, 2005 6:37 pm

WHOW QUESION that I think would be pretty interesting. is it possible if shear hits a hurricane just right can it actually help the circulation (note the drawing)
Image

is that better
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#484 Postby Astro_man92 » Mon Aug 08, 2005 6:38 pm

ivanhater wrote:im looking at visible, has the center died out??

http://hadar.cira.colostate.edu/ramsdis ... at2_0.html

I don't think it has died out but it just isn't as visable with the night floater
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#485 Postby TS Zack » Mon Aug 08, 2005 6:38 pm

Hence, a anticyclone right on top of it!
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#486 Postby superfly » Mon Aug 08, 2005 6:39 pm

ivanhater wrote:im looking at visible, has the center died out??

http://hadar.cira.colostate.edu/ramsdis ... at2_0.html


Night-time visible is hard to discern all the clouds. The center seems fine on shortwave IR.
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#487 Postby Astro_man92 » Mon Aug 08, 2005 6:39 pm

TS Zack wrote:Hence, a anticyclone right on top of it!

huh???
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#488 Postby cinlfla » Mon Aug 08, 2005 6:41 pm

anticyclone




Umm, I don't mean to sound stupid but what is an Anticyclone????
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#489 Postby gkrangers » Mon Aug 08, 2005 6:43 pm

cinlfla wrote:
anticyclone




Umm, I don't mean to sound stupid but what is an Anticyclone????
Its an area of high pressure over top of a tropical system. The anti-cyclonic flow helps the outflow of the storm, allowing it to strengthen.
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#490 Postby clfenwi » Mon Aug 08, 2005 6:44 pm

cinlfla wrote:
anticyclone




Umm, I don't mean to sound stupid but what is an Anticyclone????


From the American Meteorological Society Glossary:

Anticyclone:

An atmospheric anticyclonic circulation, a closed circulation. The wind in an anticyclone is in the clockwise direction in the Northern Hemisphere and counterclockwise in the Southern Hemisphere.
With respect to the relative direction of its rotation, it is the opposite of a cyclone. Because anticyclonic circulation and relative high atmospheric pressure usually coexist, the terms anticyclone and high are used interchangeably in common practice. Compare ridge.

http://amsglossary.allenpress.com/gloss ... ticyclone1
Last edited by clfenwi on Mon Aug 08, 2005 6:46 pm, edited 1 time in total.
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#491 Postby cinlfla » Mon Aug 08, 2005 6:44 pm

Thank You, now when ever I see that mentioned I'll know what the heck their talking about.
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#492 Postby Astro_man92 » Mon Aug 08, 2005 6:45 pm

gkrangers wrote:
cinlfla wrote:
anticyclone




Umm, I don't mean to sound stupid but what is an Anticyclone????
Its an area of high pressure over top of a tropical system. The anti-cyclonic flow helps the outflow of the storm, allowing it to strengthen.


and what i'm asking is if Shear hits a hurricane just right can it help it spin
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#493 Postby wxman57 » Mon Aug 08, 2005 6:47 pm

Astro_man92 wrote:WHOW QUESION that I think would be pretty interesting. is it possible if shear hits a hurricane just right can it actually help the circulation (note the drawing)
Image


To answer your question, small amounts of wind shear can actually aid in the intensifation of a hurricane, but your drawing would not represent what I'm talking about. Your drawing basically shows an upper-level aiticyclone over a hurricane (high center), which would aid in the outlow and help it to intensify. What I'm thinking of was Charley last year.

As Charley entered the southeastern Gulf, there was a fairly sharp trof to its northwest. This put Charley into the southeast quadrant of the upper low. Normally, you'd associate an upper-low with wind shear. But Charley wasn't quite close enough for the wind shear to disrupt the storm. Instead, the increased southwesterly winds aloft helped evacuate the large amount of rising air inside Charley, allowing it to deepen quickly prior to landfall. So by drawing air out the top of Charley, it allowed pressure to fall in Charley's center, which allowed the winds to increase.

We saw a similar situation with Lili in 2002. Lili exploded with it ran into the outer periphery of an upper low, but decreased in intensity rapidly at landfall as it encountered shear that was too strong.

There were quite a number of excellent papers on wind shear effects presented at the 26 Conference on Hurricanes and Tropical Meteorology in Miami last year. Here's a link to the papers which were presented. Some of them may still be available online:

http://ams.confex.com/ams/26HURR/techpr ... ed_212.htm
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#494 Postby Ivanhater » Mon Aug 08, 2005 6:52 pm

irene has been moving almost due west for a while now
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#495 Postby WeatherEmperor » Mon Aug 08, 2005 6:54 pm

ivanhater wrote:irene has been moving almost due west for a while now


true. its been doing that for over 6 hours now if my eyes serve me correct. I wonder how this will impact tonights model runs.

<RICKY>
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#496 Postby storms in NC » Mon Aug 08, 2005 6:54 pm

yes she has. But will see in the Am what she does over night
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#497 Postby wxman57 » Mon Aug 08, 2005 6:55 pm

ivanhater wrote:irene has been moving almost due west for a while now


I'm curious as to where you think the center is presently? I can see it fairly well on enhanced IR imagery.
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#498 Postby micktooth » Mon Aug 08, 2005 6:56 pm

wxman, thanks for that very informative post! It's nice to read information and not speculation!!! :D
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#499 Postby Ivanhater » Mon Aug 08, 2005 6:57 pm

wxman57 wrote:
ivanhater wrote:irene has been moving almost due west for a while now


I'm curious as to where you think the center is presently? I can see it fairly well on enhanced IR imagery.


what do you mean? its clearly moving west
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#500 Postby WeatherEmperor » Mon Aug 08, 2005 6:57 pm

wxman57 wrote:
ivanhater wrote:irene has been moving almost due west for a while now


I'm curious as to where you think the center is presently? I can see it fairly well on enhanced IR imagery.


what direction do you think its moving?

<RICKY>
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