T.D. #6 and Goodbye to Danny model maps 5 pm

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Stormsfury
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T.D. #6 and Goodbye to Danny model maps 5 pm

#1 Postby Stormsfury » Sun Jul 20, 2003 5:11 pm

Tropical Depression #6 is making a comeback ... convection is firing up around the suspected LLC ... and in fact, reform closer to the area of convection ... the suspected LLC is in fact likely so small that subtle changes had huge implications on its status, one way or another ... unlike the past systems, there's a high degree of uncertainty regarding the eventual track of #6 due to strength, and movement ... some models dissipating #6 in 36 hours and keeping it south (GFS, GFDL) ... and others strengthening it and keeping it as an entity and moving further northward (UKMET, NOGAPS). A lot is going to depend on if and when #6 gets it act together ... the stronger it becomes in the short-term could likely pull the overall track further northward, and obviously, the weaker it remains, #6 will likely resume a westerly course and be steered by the low-level wind field ...
The UKMET has a known bias of overamplifying patterns and so far, I'm having a little bit of a difficult time with the solution that 3 strong low pressure systems develop along the Appalachain chain in the next few days ... also the UKMET is fairly aggressive in plowing #6 NNW along the SE coast right through a retrograding portion (extension) of the Bermuda High...(however, #6 is only reflected as a 1014mb low)
Secondly, anything that moves directly over the DR/Haiti region ...especially as small as the circulation #6 is right now would likely be shredded by the 10,000 ft+ tall mountain tops ...
Image

Danny is forecast to round the base of the large subtropical ridge as only a remnant low ... regeneration is not expected with Danny despite conditions in about 72 hours becoming favorable and with SST in the progged plots back around 80ºF
Image
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#2 Postby Steve H. » Sun Jul 20, 2003 5:38 pm

TD#6 is cranking again and if this trend continues we should have Erika by Monday morning if not sooner. Throw the models out now. Let them initialize on Erika as she should be in the next 12 hours. As far as Danny is concerned, he's got a decent shot at re-organizing.....I wouldn't buy 100% into the models. But we should focus on Erika now. She's on the upswing now. No reason she shouldn't coninue to strengthen, albeit gradually. Cheers!!
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#3 Postby Stormsfury » Sun Jul 20, 2003 8:07 pm

The question is now is the center actually reforming under the deeper convection or waning a bit around the strongest area of rotation apparent on IR satellite imagery at this time ...

http://www.ssd.noaa.gov/PS/TROP/DATA/RT ... -loop.html
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