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Tropical Atlantic 2015 speculation/action


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Just look at how cluttered everything is.

 

Somewhat in relation to this there were three examples of organized convection adjacent to the east of ULLs; one was yesterday and a few days before in the southwest CONUS part of the Pacific,

and two are occurring right now one being TS Ida and another just being for now an area of enhanced convection.  It is a different version of when there were the three very strong cyclones in the Pacific; often it seems like the atmosphere especially in the northern hemisphere is prone to sharing characteristics throughout the hemisphere. 

 

I'm glad to know there are others here who like to look at the patterns in the satellite imagery.

 

Here they are starting with the Pacific example then TS Ida, then the minor but organized convection offshore of the Mid Atlantic.  :)

post-8089-0-11411800-1442889208_thumb.jppost-8089-0-94154700-1442889212_thumb.jppost-8089-0-43380200-1442889218_thumb.jp

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Eric Blake from the NHC says that this is the first time since 1914 that there have been no hurricanes in the western Atlantic (west of 55 degrees) this late in the season. While wind shear has been a significant player, a lack of moisture has also contributed. Note that the El Niño anomalies are generally as would be expected across the Pacific, which had been fairly active for a good chunk of the summer.

post-533-0-26594900-1442949113_thumb.jpg

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Although the 00Z Euro was a little weaker, both the Euro and GFS continue to look intriguing in the central Gulf in the 5-7 day range.

Just too much shear, and it looks like a big, loose low as well. By day 7+ upper level conditions might improve as the trough imparting the shear lifts out, but who knows if there will be anything over water to take advantage of those.

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12z GGEM is the lulz in the LR... has pretty decent hurricane in the GOM and takes it into W LA at the end of the run... but ofc, its the GGEM... though 00z had the tropical system in W FL

Well, that fulfills the first requirement on cyclogenesis: the GGEM has to have the strongest development of a tropical cyclone.

 

It's a complicated setup, steering currents look pretty weak and fickle, with troughs and ridges alternating on being the main steering mechanism.

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Also, this finally made the long-range TWO this afternoon:

 

ZCZC MIATWOAT ALLTTAA00 KNHC DDHHMMTROPICAL WEATHER OUTLOOKNWS NATIONAL HURRICANE CENTER MIAMI FL200 PM EDT WED SEP 23 2015For the North Atlantic...Caribbean Sea and the Gulf of Mexico:The National Hurricane Center is issuing advisories on TropicalStorm Ida, located about 1000 miles east of the northern LeewardIslands.1. A broad area of low pressure could form by Sunday over the southernGulf of Mexico. Development of this system, if any, should be slowto occur while it moves northward early next week.* Formation chance through 48 hours...low...near 0 percent* Formation chance through 5 days...low...20 percentForecaster Avila

 

 

 

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GFS still has a modest tropical storm going into the central Gulf Coast near Mobile, while the Euro finally shows a recognizable closed low going into the Big Bend.

It's interesting how consistent the GFS has been, and how inconsistent the Euro has been.

 

I honestly don't even remember what its like to have a active Atlantic season. The last few years have been so pathetic. Hoping that changes, as the Pacific has been on fire the last few years with storms.

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The Carolina coast noreaster is producing more wind than whatever forms in the Gulf this week. The  GFS day 7.5 noreaster also looks Looks stronger than anything I've seen in the western half of the atlantic this year. 

 

 

CFS v2 keeps the Caribbean dry even through week 3 and 4.  http://www.cpc.ncep.noaa.gov/products/people/mchen/CFSv2FCST/weekly/images1/wk3.wk4_20150925.gif

 

I think it's safe to call this hurricane season just as boring as forecasted.

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Hrm... A surface circulation appears to be forming east of Belize. In the least, there is mid-level turning in that complex. That needs to be watched closely as an organizing surface low at that location would place development under a much more favorable region of upper support versus where the models had a much slower and broader developing surface feature coming off the north central Yucatan coastline in a few days.

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The Carolina coast noreaster is producing more wind than whatever forms in the Gulf this week. The  GFS day 7.5 noreaster also looks Looks stronger than anything I've seen in the western half of the atlantic this year. 

 

 

CFS v2 keeps the Caribbean dry even through week 3 and 4.  http://www.cpc.ncep.noaa.gov/products/people/mchen/CFSv2FCST/weekly/images1/wk3.wk4_20150925.gif

 

I think it's safe to call this hurricane season just as boring as forecasted.

Check again, it's warm core.

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The tropical system SW of Bermuda is looking good late Sunday PM.  Moving NW.   No one is talking about it.  How does it interact with the trough along the east coast?  More moisture?  Does it get caught up and come up the coast or left behind??  Seems to have a circulation on the vis sat loop.  I would give it better than 60% to become a storm in the next 24 to 48 hours

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The tropical system SW of Bermuda is looking good late Sunday PM.  Moving NW.   No one is talking about it.  How does it interact with the trough along the east coast?  More moisture?  Does it get caught up and come up the coast or left behind??  Seems to have a circulation on the vis sat loop.  I would give it better than 60% to become a storm in the next 24 to 48 hours

The NHC would agree

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Models

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