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2015 Tropical Season Thread


CT Valley Snowman

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This is sort of dryly amusing... 

 

The headline reads, "...Fred refuses to weaken...,"  and the discussion later reads, "..Fred has been decapitated again by strong westerly wind shear.  However, the low-level circulation continues to be vigorous. The initial intensity remains at 35 kt, based on satellite estimates and  continuity. I will not speculate any more about the convection redeveloping or not. The NHC forecast calls for little change in intensity during the next 36 hours. If resilient Fred survives the next day or so, there is a chance of slight re intensification as indicated by the SHIPS/GFS and SHIPS/ECMWF intensity guidance."

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Well, looks like TPC is officially firing up the designation for the big # 7 out S of the CV isles...

 

It is hard to track that disturbance in the models, as they en masse tend to keep it weak ... with some solutions having nothing more than a polarward bulge in the monsoonal trough's pressure contouring, that rolls west in that 15th to 20th parallel.  Other models, like the GFDL and HWRF ...struggle to deepen it but it's like there's some physical contention going on that holds it in check.  

 

Perhaps all that will change the next time its presence actually makes it into the inputs.  

 

Question, does formal designation of these fledgling disturbances trigger some sort of 'forced analysis' in the inputs?  I'm curious if there's sort of standard assumption of pressure, temperature and moisture that is only offset IF the models are forced to analyze by designation - 

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Would you guys stop obsessing over this thread already ...

 

 

What's interesting about 92L is that ... about 3 or 4 days ago, there were several successive model runs that spun up an uber deep ocean tempest E of Bermuda... They lost, but now and Invest pops up along the frontalysis out there - hmm

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Would you guys stop obsessing over this thread already ...

 

 

What's interesting about 92L is that ... about 3 or 4 days ago, there were several successive model runs that spun up an uber deep ocean tempest E of Bermuda... They lost, but now and Invest pops up along the frontalysis out there - hmm

You would think that an Atlantic littered with stillborn tropical fetuses would garner more attention.

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It's the apex of the tropical season today!!!

Run for cover!!

 

This next one coming off Africa just "Invested" by TPC.

 

A few models role an apparent 'dent' in surface pressure pattern ... westward, and some, like the hugely trustworthy and fantastically accurate CMC model (that never over-zealously deepen tropical systems without physical cause...) even bring it to hurricane status out there around D7.5   

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Models develop an area of low pressure off the East Coast of FL and moves it generally north-northeastward towards Canadian Maritimes.  Could become very potent with a strong polar outflow channel with convection streaming in that direction.  Wind shear is dying off from southwest to northeast with time and about 72-120 hours of time to intensify before it moves over cooler SSTs.  The SSTs off the SC and FL coastlines can produce or sustain a 900mb hurricane at this time of the year.

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Models develop an area of low pressure off the East Coast of FL and moves it generally north-northeastward towards Canadian Maritimes.  Could become very potent with a strong polar outflow channel with convection streaming in that direction.  Wind shear is dying off from southwest to northeast with time and about 72-120 hours of time to intensify before it moves over cooler SSTs.  The SSTs off the SC and FL coastlines can produce or sustain a 900mb hurricane at this time of the year.

Whatever happens just wish it would bring us rain.  NHC doesn't even have anything with an X on their maps

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Models develop an area of low pressure off the East Coast of FL and moves it generally north-northeastward towards Canadian Maritimes. Could become very potent with a strong polar outflow channel with convection streaming in that direction. Wind shear is dying off from southwest to northeast with time and about 72-120 hours of time to intensify before it moves over cooler SSTs. The SSTs off the SC and FL coastlines can produce or sustain a 900mb hurricane at this time of the year.

Has there ever been a 900mb cyclone anywhere near the east coast? Outside the Keys of course.

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Uh uh uuuuuuh, it's not over 'till it's over...

 

It's been a long time since we've seen a solid Basin meandering TC.   This looks like a GPS tracker for a kid lost in a mall - "Mommy?  where's my mommy?  Have you seen my mommy?"

 

post-904-0-02478300-1443102197_thumb.jpg

 

 

The models tossing out some bizarre predicted motion with Idaho potato. The gist of which is more drifting, perhaps some motion to the N or even NE, then a halt ... recapitulation, then reversing toward the W.  

 

I hope the 180 hour GGEM fantasy of having a mid category hurricane bouncing off the Gulf Coast in three days of band-sawing, while another strong TC approaches the outer Bahamas bears reality ... 

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Tropical system SW of Bermuda is looking better and better as it moves NW late this PM.  Clear rotation at least at the mid levels.

Just looking at the 18Z GFS I can't figure if it has 98L kind of moving west during the next couple of days and then just stalling around just off the SE.  Then the next trough quickly captures it and yanks it up the coast.  Could we be looking at a scenrio of a tropical storm or hurricane next weekend in the New England vicinity next weekend?   Interesting situation that no one is talking about.

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Because it rarely happens 18z gfs rain totals are pretty epic though

Just looking at the 18Z GFS I can't figure if it has 98L kind of moving west during the next couple of days and then just stalling around just off the SE. Then the next trough quickly captures it and yanks it up the coast. Could we be looking at a scenrio of a tropical storm or hurricane next weekend in the New England vicinity next weekend? Interesting situation that no one is talking about.

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