2015 WPAC Season

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1900hurricane
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#401 Postby 1900hurricane » Tue Aug 11, 2015 9:26 am

Both the modeled tropical cyclones are developing out of the same monsoon trough currently in the vicinity of the Marshall Islands. The western portion has already been designated 97W and I imagine the eastern portion will be tagged as a second invest in the future.
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Re: 2015 WPAC Season

#402 Postby euro6208 » Tue Aug 11, 2015 4:00 pm

EURO develops Atsani in less than 96 hours and passing over the Northern Marianas, a bit north than the last update, as a strong 934 mb STY and bottoming out at 927 mb southeast of Okinawa...

12Z GFS has Typhoon Atsani in less than 162 hours and peaks it at 889 mb as it recurves!
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Re: 2015 WPAC Season

#403 Postby euro6208 » Tue Aug 11, 2015 4:00 pm

GFS trying to spin up Etau...
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Re: 2015 WPAC Season

#404 Postby cycloneye » Tue Aug 11, 2015 7:39 pm

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euro6208

Re: 2015 WPAC Season

#405 Postby euro6208 » Wed Aug 12, 2015 8:19 am

What looks to join the twins is Etau near Wake Island...

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Re: 2015 WPAC Season

#406 Postby euro6208 » Wed Aug 12, 2015 4:43 pm

GFS on Etau and Vamco near the Marianas and possibly 2 more systems...

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Re: 2015 WPAC Season

#407 Postby euro6208 » Thu Aug 13, 2015 5:14 am

West Pacific off the charts in week 3...

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euro6208

Re: 2015 WPAC Season

#408 Postby euro6208 » Thu Aug 13, 2015 5:22 am

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We've often see el nino with all that warm waters churned up over in the CPAC and EPAC with cool waters over the WPAC but that won't stop TC activity. This basin still is the most active and most devastating. Storms form very near the dateline where the warmest waters are at and travel long distances with many islands in the path especially the Marianas which hits increasing 300% reaching Asia. Many of these become Super Typhoons...
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Re: 2015 WPAC Season

#409 Postby euro6208 » Fri Aug 14, 2015 7:21 am

What an amazing show the WPAC will deliver...Goni and Atsani coming up Cat 5's...Too bad the western system will hit and affect alot of people...
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#410 Postby 1900hurricane » Fri Aug 14, 2015 10:32 pm

Goni and Atsani have developed, but there still is some convection flaring up with the monsoon trough back at the Dateline. Models aren't too enthusiastic about anything developing there, but it couldn't hurt to keep an eye on it.

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Re: 2015 WPAC Season

#411 Postby euro6208 » Sat Aug 15, 2015 4:02 am

Models hinting on Etau and Vamco...
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#412 Postby TheAustinMan » Sat Aug 15, 2015 4:48 pm

Goni (left) and Atsani (right) on Sunday morning, courtesy of the Himawari-8 satellite.

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Re: 2015 WPAC Season

#413 Postby xtyphooncyclonex » Sat Aug 15, 2015 9:58 pm

So far, the average longitude of TD formation (JTWC's first advisory) is at 151.3E, which is much farther east than any other year on records since it began in 1951, surpassing 2002's longitude of 145.9E
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#414 Postby 1900hurricane » Sat Aug 15, 2015 10:20 pm

According to JTWC's annual tropical cyclone report from 1997, 1972 (another strong El Nino year) was also right about 150*E. This is just based on the graphic on page 33 though; I can't say I've crunched any numbers myself. 1992 and 1997 were also quite far east, but not quite to 150*E.
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#415 Postby 1900hurricane » Sun Aug 16, 2015 10:35 am

Numerical guidance is beginning to hint at a storm crossing over from the CPac a week to 10 days out. Still a long way out, but it could be our next thing to watch after the WonderTwins clear out.
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euro6208

Re: 2015 WPAC Season

#416 Postby euro6208 » Mon Aug 17, 2015 7:58 am

Models now hinting on Krovanh after Etau and Vamco...
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Re: 2015 WPAC Season

#417 Postby galaxy401 » Mon Aug 17, 2015 12:24 pm

euro6208 wrote:Models now hinting on Krovanh after Etau and Vamco...


Are you certain that storm will be Krovanh? What if that one is Etau or Vamco?
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Re: 2015 WPAC Season

#418 Postby Ntxw » Mon Aug 17, 2015 7:49 pm

Still soaking in the Super twins

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Re: 2015 WPAC Season

#419 Postby dexterlabio » Mon Aug 17, 2015 7:56 pm

It's amazing how this basin is still able to spawn 2 major cyclones when the CCKW is situated in the Western Hemisphere, so it means sinking air must somehow be dominating the Western Pacific but no... :lol: It will be much more interesting if these two will make it to Cat 5 as what the models are predicting...
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Re: 2015 WPAC Season

#420 Postby euro6208 » Tue Aug 18, 2015 6:43 am

dexterlabio wrote:It's amazing how this basin is still able to spawn 2 major cyclones when the CCKW is situated in the Western Hemisphere, so it means sinking air must somehow be dominating the Western Pacific but no... :lol: It will be much more interesting if these two will make it to Cat 5 as what the models are predicting...


Ivan Joan Part II...
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