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Atlantic Tropical Action 2013 - Part 2


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48hr Visible/Infrared Satellite Blend

 

0z GFS Winds

 

 

You should really ask Ian or Randy for a Pro tag at some point now that you've been working at WVEC. ;)

Haha good idea! Just in time for winter.... :)

 

wow according  to this, the northeast gets the best winds out of anywhere from this.  How is that possible?

At that point it would no longer be a pure tropical system. Interaction with a front might boost the winds a bit

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wow according to this, the northeast gets the best winds out of anywhere from this. How is that possible?

That was at a certain hour from that run.

As "it" heads north, "it" will interact with a cold front and undergo baroclonic influences. So not purely tropical at that point.

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WPC doesnt like the GFS, track wise at least:

 

CONVECTIVE LOW OVER THE YUCATAN CHANNEL
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
PREFERENCE: NON-GFS COMPROMISE
CONFIDENCE: AVERAGE

THE 12Z GLOBAL ENSEMBLE GUIDANCE SHOWED SOME SPREAD WITH THIS
SYSTEM AS IT MOVES UP TOWARDS/ASHORE THE GULF COAST, BUT NOTHING
EXTREME FOR THREE DAYS INTO THE FUTURE. THE 00Z GFS WAS ON THE
EASTERN FRINGE OF THE ENSEMBLE SPREAD, WHILE THE REMAINDER OF THE
GUIDANCE SHOWS REASONABLE CLUSTERING. A NON-GFS COMPROMISE LIES
WITHIN THE OVERALL 12Z GLOBAL ENSEMBLE SPREAD AND IS PREFERRED
WITH AVERAGE CONFIDENCE CONSIDERING THE SYSTEM'S PROGRESSIVE
NATURE. SEE NATIONAL HURRICANE CENTER TROPICAL WEATHER OUTLOOKS
FOR THIS CYCLONE'S LATEST STATUS.

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WPC doesnt like the GFS, track wise at least:

 

CONVECTIVE LOW OVER THE YUCATAN CHANNEL

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

PREFERENCE: NON-GFS COMPROMISE

CONFIDENCE: AVERAGE

THE 12Z GLOBAL ENSEMBLE GUIDANCE SHOWED SOME SPREAD WITH THIS

SYSTEM AS IT MOVES UP TOWARDS/ASHORE THE GULF COAST, BUT NOTHING

EXTREME FOR THREE DAYS INTO THE FUTURE. THE 00Z GFS WAS ON THE

EASTERN FRINGE OF THE ENSEMBLE SPREAD, WHILE THE REMAINDER OF THE

GUIDANCE SHOWS REASONABLE CLUSTERING. A NON-GFS COMPROMISE LIES

WITHIN THE OVERALL 12Z GLOBAL ENSEMBLE SPREAD AND IS PREFERRED

WITH AVERAGE CONFIDENCE CONSIDERING THE SYSTEM'S PROGRESSIVE

NATURE. SEE NATIONAL HURRICANE CENTER TROPICAL WEATHER OUTLOOKS

FOR THIS CYCLONE'S LATEST STATUS.

Ordinarily, I would completely understand the idea of not going with the eastern outlier, the gfs. However, even the gfs has so far been a little too far west as even it didn't have it going through the extreme western edge of the Yucatan Channel. I'd say the gfs is going to verify closest.

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Larry.... we have to NOT go with the GFS... I want rain.  :popcorn: To far east and you and I miss it!

Lol! I'm just a friendly, objective messenger. ;)

This is going to turn out to be one of the worst Euro busts in a long time! Even the 0Z Thu run, with its somewhat stronger and further east track initially, is going to bust bigtime.

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Some honking for the Carribean next week

 

 

The GFS has been consistent the last few days with a NW Caribbean threat...looks interesting, and even though it's the long range GFS, MJO transit supports this. Also, it looks like that shorter than normal long waves will keep ridging a bit north of climo, thus keeping the chances of shear lower than average. 

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As of October 3rd, there is still a finite chance of a major hurricane making landfall in the HGX CWA.

 

Saturday, not counting Steve's Barelycane Jerry, the season is officially over.

 

 

Although I'd take a badly sheared ugly out of season TC if it'd drop an inch or two on the water oak.

 

I see 1949 was the 8th wettest year ever at Hobby, 71.19 inches of rain, but I can't easily find 3 October 1949 or 10/4/1949 rainfall amounts.

 

680px-1949_Atlantic_hurricane_10_track.p

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As of October 3rd, there is still a finite chance of a major hurricane making landfall in the HGX CWA.

 

Saturday, not counting Steve's Barelycane Jerry, the season is officially over.

 

 

Although I'd take a badly sheared ugly out of season TC if it'd drop an inch or two on the water oak.

 

I see 1949 was the 8th wettest year ever at Hobby, 71.19 inches of rain, but I can't easily find 3 October 1949 or 10/4/1949 rainfall amounts.

 

 

1912, storm #6

 

No recorded cane landfalls for MX west of 95W past Oct 10th.

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As of October 3rd, there is still a finite chance of a major hurricane making landfall in the HGX CWA.

 

Saturday, not counting Steve's Barelycane Jerry, the season is officially over.

 

 

Although I'd take a badly sheared ugly out of season TC if it'd drop an inch or two on the water oak.

 

I see 1949 was the 8th wettest year ever at Hobby, 71.19 inches of rain, but I can't easily find 3 October 1949 or 10/4/1949 rainfall amounts.

 

You should be able to access all archived F6 climate data for free here (once the govt shutdown is over):

 

http://www7.ncdc.noaa.gov/IPS/lcd/lcd.html

 

If it's official data, it will be available there. 

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The 00Z Multi Model TC Genesis Probabilities continue to suggest the SW Caribbean Sea does have a fairly high chance of developing a storm in the medium to long range. The operational GFS and European have been 'sniffing' that area for potential TC development and their ensembles do suggest lower pressure across the Western half of the Caribbean at that time. It is also noteworthy that an upper ridge is being modeled over the Western/Central Gulf of Mexico as well and once a secondary trough passes next weekend, perhaps conditions may be a bit more conducive for TC development as others have mentioned.

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A few of the 12z GFS ensemble members and some of the GFS runs the past few days, including the 10/4 18z GFS have a nice Caribbean cruiser in about ten days that is near the Yucatan as a potent looking large tropical cyclone. Obviously fantasy range but this seems to agree well with that idea.

 

gth_small.png

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OTHER SYSTEMS WITH FORMATION POTENTIAL BEYOND 48 HOURS...

AN AREA OF LOW PRESSURE COULD FORM OVER THE EASTERN TROPICAL
ATLANTIC OCEAN DURING THE NEXT FEW DAYS. SOME DEVELOPMENT OF THIS
LOW IS POSSIBLE EARLY NEXT WEEK WHILE IT MOVES WEST-NORTHWESTWARD
AT 10 TO 15 MPH. THIS SYSTEM HAS A LOW CHANCE...NEAR 0 PERCENT...OF
BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS...AND A MEDIUM
CHANCE...30 PERCENT...OF BECOMING A TROPICAL CYCLONE DURING THE
NEXT 5 DAYS.
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the area of disturbed weather north of Puerto Rico may need to be watched as admittedly this will start out as an ET system that transitions into something tropical and threatens the Carolina Coast next week and has been showing this for several runs in a row but as we've seen in 2013 one can't say it will develop even though the models say so

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Besides Euro suggesting a potential STS Lorenzo and then a freakishly far East TS Melissa (icing on the cake of the STS Lorenzo, a low shear photogenic Atlantic storm Melissa?) Possible suggestions of  mid-late October action.

 

Not an MJO master, and I wish the Op was higher amplitude, but Halloween season hijinks maybe?  Happened last year.  And I won't be bummed about missing the Wilma anniversary w/o a Florida hurricane if there was an end of month or even November hurricane, and I cling tight to the memory (well, I read it somewhere, I was out in the Navy) of 1985's Hurricane Kate for holding out my trademark optimism, that Florida can be slammed past mid-November.

 

1381955_562066523849151_3511999_n.jpg

post-138-0-09748200-1381041322_thumb.gif

post-138-0-29890600-1381041332_thumb.gif

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 It does look like to me that the original LLC of Karen is pretty much open/dead. However, I am slightly curious about whether or not there could be a new circulation (maybe non-Karen) about due south of the MS/AL border. The thunderstorms seem to have persisted in a concentrated somewhat circular area for several hours as it moves ENE:

 

 http://www.ssd.noaa.gov/PS/TROP/floaters/12L/flash-avn-long.html

 

With no vis, it is quite difficult to tell at night. This is probably a longshot, but I thought it to be well worth mentioning after hearing about that possible new LLC last evening.

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The system in the far E Atlantic has a pretty good shot to develop. It had support form the GFS and now has support form the ECMWF. The ECMWF is particularly interesting as it shows the large upper-level trough that will dig in behind it will completely cutoff and drop into the E Caribbean. If that happens, the shear over the system will only be strong temporarily and then relax again as the storm moves N of the Lesser Antilles.

 

The GFS is actually much more unfavorable for a change with no cutoff developing and dropping SW and just a large corridor of upper level westerlies that will shear apart the system.

 

The other system Ed is referring to is not a tropical or subtropical cyclone but just an extratropical low. 

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