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Invest 98L


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BEGIN

NHC_ATCF

invest_al982011.invest

FSTDA

R

U

040

010

0000

201108182101

NONE

NOTIFY=ATRP

END

INVEST, AL, L, , , , , 98, 2011, DB, O, 2011081818, 9999999999, , , , , , METWATCH, , AL982011

AL, 98, 2011081718, , BEST, 0, 116N, 126W, 25, 1009, DB, 0, , 0, 0, 0, 0,

AL, 98, 2011081806, , BEST, 0, 121N, 153W, 25, 1007, DB, 0, , 0, 0, 0, 0,

AL, 98, 2011081812, , BEST, 0, 123N, 164W, 25, 1007, DB, 0, , 0, 0, 0, 0,

AL, 98, 2011081818, , BEST, 0, 126N, 176W, 25, 1006, DB, 34, NEQ, 0, 0, 0, 0, 1008, 300, 60, 0, 0, L, 0, , 0, 0, INVEST, S,

post-1245-0-28454800-1313701703.jpg

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It seems that at least for the next 24-48 hours this wave will be interacting with a convectively coupled kelvin wave (CCKW) which may aid it in becoming a tropical cyclone during this time frame. Beyond this period though, the subsident phase of the kelvin wave may actually work against it by increasing low level easterly flow with convergence aloft suppressing convection. In addition, the forecast track of 98L by the most recent track guidance suite takes it pretty early on to the northwest into the stable SAL and lower sea surface temperatures that don't favor development. Thus, its not surprising to see the ECWMF not do too much with this system beyond the first couple of days.

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May I ask someone who is knowledgeable to clarify something for me, please? What would make the TVCN have a straight downward drop, and the BAMD have a downward curving drop. I'm not sure if I've noticed something like that before.

TVCN is the consensus of several models, including the NOGAPS which is probably altering the consensus with it's crazy WSW motion plus dissipation at 144.

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