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Hurricane Sandy - LIVE - Meteorological Discussion


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Plenty of warm water fuel between Jamaica & Cuba.

This is still about the peak of the year for ocean SSTs. Baroclinic energy will take over as the driving process when Sandy reaches the cooler waters anyways, it could very well intensify all the way until shore like the globals are suggesting. And I mean intensify in the sense of its minimum pressure and kinetic energy, peak winds will level out as it transitions to around cat 1-2 but the wind field will keep expanding. This has major storm surge written all over it.

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This thing is over the ammonium perchlorate of the TC world, that water is just ideal...

I.E. this...

Let's not forget the outflow enhancement courtesy of the sub-tropical jet, tremendous mass evacuation going on. It's playing a big role in this rapid intensification http://mapmaker.aos.wisc.edu/scr3/sat/g8/g8wvflash.html

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This is still about the peak of the year for ocean SSTs. Baroclinic energy will take over as the driving process when Sandy reaches the cooler waters anyways, it could very well intensify all the way until shore like the globals are suggesting. And I mean intensify in the sense of its minimum pressure and kinetic energy, peak winds will level out as it transitions to around cat 1-2 but the wind field will keep expanding. This has major storm surge written all over it.

+ full moon high tide

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Not sure if this is the right place to post this or not but James Spann is hosting a live chat discussing Hurricane Sandy and what her future might hold.

James Spann @spann

We will have a special WeatherBrains tonight at 8:30 CDT to talk about Sandy. @timbrice17 of the NWS will our guest. http://live.bigbrainsmedia.com

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Is mid-level dry air (perhaps via downsloping off the Jamaican and Cuban mountains) mixing into the core and causing the intense convection on the NW side? Convection in the SE quadrant has correspondingly diminished. In this case, the very high TCHPA combined with the steep lapse rates and surface flux may be allowing parcels to continue cooling rapidly as they ascend, canceling the mid-level dry air and merging with the jet entrance to result in steady but gradual intensification.

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From NE thread....Cuban radar:

http://www.met.inf.c.../plnMAXw01a.gif

Its interesting that the reflectivity signature is a bit ragged, with the reflectivity and recon observations suggesting the eye is open to the SE. Even more interesting, recon obtained the highest FL winds in the SE quadrant, yet the strongest SMFR winds were in the NW quadrant. This is probably a direct consequence of the convective asymmetry of the eye currently.

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Is mid-level dry air (perhaps via downsloping off the Jamaican and Cuban mountains) mixing into the core and causing the intense convection on the NW side? Convection in the SE quadrant has correspondingly diminished.

It hasn't diminished at all.

It's just not as cold as the -85C tops wrapping around the western side.

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000

URNT12 KNHC 250202

VORTEX DATA MESSAGE AL182012

A. 25/01:46:00Z

B. 19 deg 01 min N

076 deg 21 min W

C. 700 mb 2748 m

D. 74 kt

E. 050 deg 15 nm

F. 146 deg 89 kt

G. 050 deg 15 nm

H. EXTRAP 961 mb

I. 10 C / 3050 m

J. 15 C / 3050 m

K. 10 C / NA

L. CLOSED WALL

M. C22

N. 12345 / 7

O. 0.02 / 3 nm

P. AF302 0518A SANDY OB 11

MAX FL WIND 96 KT SE QUAD 00:15:00Z

SLP EXTRAP FROM 700 MB

MAX FL TEMP 16 C 042 / 7 NM FROM FL CNTR

;

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