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West Pacific Tropical Action 2012


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Deja vu all over again-the satellite imagery and weather distribution over South Korea reminds very much of TS Lester 20 years ago as it headed into AZ. The storm is transitioning but still tropical.

Steve

indeed it is... 200,000 homes without power in SK last time i checked, along with four deaths... unfortunately it is now moving into North Korea so even scarier scenario for them there, and it looks like Tembin might make landfall there as well by Friday...

speaking of Tembin, it brushed the southern part of Taiwan as a weak Typhoon (JTWC even downgraded it into a tropical storm before moving into Taiwan)... Lanyu Island reported maximum sustained wind of around 85mph with a gust of 135mph; along with minimum pressure of 966mb! :yikes:

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speaking of Tembin, it brushed the southern part of Taiwan as a weak Typhoon (JTWC even downgraded it into a tropical storm before moving into Taiwan)... Lanyu Island reported maximum sustained wind of around 85mph with a gust of 135mph; along with minimum pressure of 966mb! :yikes:

Just another horrible initial intensity by the JTWC. I feel for them sometimes since they only rarely have recon obs.

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Re: Bolaven... I chatted with James Reynolds, who chased it. (He's one of my very best chaser buddies-- a great guy.)

Anyhoo, bottom line is that Bolaven was just... weird. James did punch the core, and he said they didn't experience winds any higher than Cat 1-- despite a station in the eye reporting a whopping 935 mb! (Lolz, typical chinacane gradient issues. :D)

Of that collection of concentric, cinnamon-roll "eyewalls", James was in the second-most-inner one as the center came ashore (by light of day), then worked S and punched the eye to experience the backside of the inner eyewall (after sundown).

This video shows both phases of his chase. He does gorgeous work. Like Jim Edds, he's a real videographer-- uses really good equipment and gets clean, beautiful shots:

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  • 2 weeks later...

PGTW DT now at 7.5 JTWC will probably put this at 140 or 145kt by 18z... this will be our first Category 5 of 2012 and second super typhoon.. also the first "Violent" Typhoon of this year (classification used by JMA)... :o

EDIT: btw, JTWC calling it an Annular Typhoon?? what does it mean??

If they believe T7.5 (and why wouldn't they?), they'll call it 155kts.

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I was going to lopp the SSD products to see if it really is losing banding. SSD is having issues. BUt the eye "seems" small for an annular TC, and double checking Wiki, because I knew SST played a factor, it is over water at the upper limit (per Wiki, anyway, maybe the Great DR wrote it) of the SST range.

But if it is annular, per Wiki, it is more resistant to ERCs

2012255npsst.png

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Annular hurricanes/typhoons are not strong. Resilient to cool SSTs and shear, but not strong

They average Cat 3 intensity per the Kossin paper I Googled a few minutes ago. More than a smidge over 100 knots, IIRC.

Knaff and Kossin paper.

Accompanying

this structure is a nearly constant intensity1 with an average

of 107.6 kt (1 kt 5 0.514 m s21).

ETA

As Amped noted, it doesn't quite look annular enough to be annular anyway.

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EDIT: btw, JTWC calling it an Annular Typhoon?? what does it mean??

awww... :cry:

hope i'm not too cynical but if annular it should maintain at least Cat 4 to Okinawa right??

It's not annular. Dora wasn't that annular either. Needs to look a lot more like a donut than a cinniibun to be annular.

Annular hurricanes/typhoons are not strong. Resilient to cool SSTs and shear, but not strong

The storm is not annular. The distinctive characteristic that sets apart well organized (but not annular TCs) vs. well organized annular TCs is the lack of outer rain-bands that ultimately result in an EWRC. Most of the microwave passes that we have seen today show a very distinct rain-band that is starting to wrap up into an outer eyewall. See image below

178i2f.jpg

Compare with an annular storm (Isabel 2003).

beese0.jpg

While annular storms do have on average have a lower mean wind than what Sanba has currently, I don't think that precludes Annular TCs from becoming Super-typhoons or reach Category 5 status (as Isabel clearly signifies). While Annular vs. Non-Annular storms can have similar satellite presentations (as we see today), you need to have microwave imagery to truly confirm the lack of rainbands surrounding the eyewall.

From the given images above, Sanba is probably peaking at the present time and should be undergoing EWRC within the next 24 hours.

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Given that much advertised Bolaven was quite a bit weaker than expected, despite a 935 hPa pressure, will the Okinawans take this one seriously if it does become a credible threat? Sanba is much tighter and compact and likely to remain stronger if it crosses the island.

Steve

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