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Hurricane Danielle


WxWatcher007
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3. Central Subtropical Atlantic:
An area of low pressure has formed along a decaying frontal zone 
over the central subtropical Atlantic about 850 miles 
west-southwest of the westernmost Azores.  Environmental conditions 
are expected to be conducive for development, and a tropical or 
subtropical depression is likely to form during the next few days 
while the system drifts generally eastward.  
* Formation chance through 48 hours...medium...60 percent.
* Formation chance through 5 days...high...70 percent.
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 So per the above tweet, the chance for an August TC ends if this isn't a TD by 8 PM EDT this evening because when it becomes a TD as opposed to when it becomes named is the most important milestone and also they use UTC. That will determine if August is a TC shutout.

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Look healthy enough on visible, solid rotation on lower level clouds but most of the heavy convection is displaced off to the right of the center but may be trying to wrap around, If it can wrap around fast enough we should be able to break the 0/0/0 August we are in. Probably going to be close.

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2 hours ago, NorthHillsWx said:

Would be absolutely comical if the LAST possible advisory for August featured a system 

If that happens they should name the system Rich Strike - that horse that almost no one expected to win the Kentucky Derby.

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18 minutes ago, olafminesaw said:

Mighty impressive. Surely upwelling will hold back intensity for the next couple days though? Or does the subtropical structure negate this?

This looks fully tropical to me. Upwelling may be a factor, but there’s a little OHC up there and the waters are anomalously warm—which may be contributing to why the MDR is a tire fire. 
 

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Tropical Storm Danielle Discussion Number   2
NWS National Hurricane Center Miami FL       AL052022
300 PM GMT Thu Sep 01 2022

A recent ASCAT pass revealed areas of tropical-storm-force winds and 
the initial intensity is raised to 35 kt making the system Tropical 
Storm Danielle.  Visible satellite imagery also shows convective 
coverage expanding and obscuring the low-level circulation.

The initial motion of the storm is eastward at 3 kt.  The tropical 
storm is located in an area of light winds and weak steering under 
an omega block.  This will likely cause the system to slowly drift 
around the same general area until the anticyclone weakens and a 
mid-latitude trough steers Danielle poleward around day 4.  The 
official track forecast is similar to the previous advisory 
prediction and lies between the model consensus aids.

Danielle is over an area of warmer than average ocean waters.  
Atmospheric conditions are also forecast to be relatively favorable, 
with light- to moderate-northerly to northwesterly shear for the 
next three days or so.  The NHC forecast calls for additional 
strengthening and Danielle is expected to become a hurricane in two 
days and peak in intensity in about 4 days.  When the storm moves 
northward, Danielle will likely weaken as it moves over cooler sea 
surface temperatures and the vertical wind shear increases.


FORECAST POSITIONS AND MAX WINDS

INIT  01/1500Z 38.1N  44.7W   35 KT  40 MPH
 12H  02/0000Z 38.2N  44.3W   40 KT  45 MPH
 24H  02/1200Z 38.2N  44.0W   45 KT  50 MPH
 36H  03/0000Z 38.1N  44.0W   55 KT  65 MPH
 48H  03/1200Z 38.0N  44.2W   65 KT  75 MPH
 60H  04/0000Z 38.0N  44.8W   70 KT  80 MPH
 72H  04/1200Z 38.5N  44.9W   75 KT  85 MPH
 96H  05/1200Z 40.0N  43.6W   80 KT  90 MPH
120H  06/1200Z 42.0N  42.0W   75 KT  85 MPH

$$
Forecaster Bucci/Cangialosi
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21 minutes ago, NorthHillsWx said:

It’s actually found itself in a pretty good spot (really an island) of moderately warm water and good upper level divergent flow. Looks to be on its way to being our first hurricane of the year. 

The opposite of everything else so far this season lol

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Danielle is working on establishing a CDO this afternoon. Definitely some light to moderate shear but it’s also helping to establish a divergent, venting flow aloft which really helps these mid latitude systems over slightly cooler set’s. Everything continues to progress nicely for a decent little fish hurricane 

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13 minutes ago, NorthHillsWx said:

Danielle is working on establishing a CDO this afternoon. Definitely some light to moderate shear but it’s also helping to establish a divergent, venting flow aloft which really helps these mid latitude systems over slightly cooler set’s. Everything continues to progress nicely for a decent little fish hurricane 

Look at this microwave imagery! We have a special advisory!

 

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