CoconutCandy
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Loc: Beautiful Honolulu Hawaii
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Typhoon 'CHOI-WAN' Passing Thru the Marianas, Skirting Guam
Sun Sep 13 2009 09:19 PM
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Western Pacific Cyclone 'Choi-Wan' has organized and intensified today sufficiently to be upgraded to Typhoon (Hurricane) status, and is on it's way to becoming a Major Typhoon with a forecast peak intensity of 115 Knots or 135 mph.
(Post Note: Typhoon Choi-Wan has strengthened to 75 Kts. within the past hour or so as I write.)
![](http://www.winstonswaikikicondos.com/Choi%20Wan%2065%20Kts.jpg)
Here's a recent Passive Microwave Image of Typhoon 'Choi-Wan' showing the eyewall structure continuing to improve.
![](http://www.winstonswaikikicondos.com/Choi%20Wan%2065%20Kts%20Microwave.jpg)
Choi-Wan's projected path takes it to the north of Saipan, so it appears that Guam will not experience the eyewall and will be on the southern, 'weaker' side of the typhoon. ![](http://i.flhurricane.com/cyclone/images/graemlins/wink.gif)
Animated Color IR Loop of Western Pacific
(Click Repeatedly to Zoom In and Click and Drag to Pan Around)
Also, the typhoon is now beginning to show up on long-range doppler radar out of Andersen Air Force Base, and the coming hours should continue to depict the ongoing developments in the inner core convection (eyewall) more clearly as 'Choi-Wan' slowly approaches Saipan.
Long-Range Doppler from Guam (Note: This is a 'real-time' link, showing the latest imagery)
(I like to UNCHECK everything EXCEPT 'Radar' and 'Counties', click the 'Rock' button ONCE so it shows 'Loop', and bump up the Animation Speed just a little. (Click Repeatedly to Zoom In and Click and Drag to Pan Around.) Somehow, this makes easier to perceive ongoing changes in the storms' structure.)
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As an aside, I believe that this cyclone is the "Regenerated" Eastern Pacific Cyclone 'HILDA', which was sheared apart in the Central Pacific a little more than a week ago, with the remnant low passing just south of the Big Island.
As is often the case, decayed or 'failed' cyclones that maintain a vigorous low and/or mid-level circulation upon crossing the International Date Line and into the Western Pacific will find very warm waters with *plenty* of 'Oceanic Heat Content' available and, when the upper atmospheric flow becomes favorable, this pre-existing disturbance will often develop into a 'new' tropical cyclone, one bearing a new name from the list of storm names for the Western Pacific .
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Will be posting more on Typhoon Choi-Wan as it passes through and to the west of the Mariana Islands.
Edited by CoconutCandy (Mon Sep 14 2009 11:59 AM)
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