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2023 Atlantic Hurricane season


Stormchaserchuck1
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23 hours ago, Ed, snow and hurricane fan said:

It seems to me there are few patterns where some part of Florida isn't at risk of a TC landfall June to mid November.

A trough definitely doesn't support it, as we have a stronger one setting up now, veering Franklin out to sea. The -PNA at Day 15 is still taking shape on models, but it looks like it could pair up with +NAO, which again is a EC, US ridge signal (at day 15+). 

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This system developing in NW Caribbean feels like something you’d see spin up in October, not August. The Atlantic has a late season feel to it at the moment 
Well, I mean, we did just have what would normally be a mid-to-late August Caribbean cruiser get smacked to all hell, then get kicked NNE of the Greaters by unrelenting Caribbean SW flow. Hrmmm.... But we may still get a major out this thanks to near virtually perfect timing.

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8 hours ago, NorthHillsWx said:

This system developing in NW Caribbean feels like something you’d see spin up in October, not August. The Atlantic has a late season feel to it at the moment 

Everything has a late season feel to it up here.  The weather up here in the northern Mid-Atlantic and Northeast has been nothing resembling August.   The trees up here have been changing colors now for weeks and it is not drought related.   We have only touched 90 degrees twice the entire month.  Honestly there has been a NW, N, or NNE, NE flow up here since basically the fronts have never stopped coming.  It should be really interesting to see what happens September to March.  

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2 hours ago, Kevin Reilly said:

Everything has a late season feel to it up here.  The weather up here in the northern Mid-Atlantic and Northeast has been nothing resembling August.   The trees up here have been changing colors now for weeks and it is not drought related.   We have only touched 90 degrees twice the entire month.  Honestly there has been a NW, N, or NNE, NE flow up here since basically the fronts have never stopped coming.  It should be really interesting to see what happens September to March.  

Someone has not looked at a 500mb map for at least the last 10 days and it shows 

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ACE has risen to 39, slightly higher than the 30 year average for the date. 
 

 Aside: As the tropics get very active, you know who gets quiet. Same pattern most every time. That strategy helps make him/her effective. 

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ACE has risen to 39, slightly higher than the 30 year average for the date. 
 
 Aside: As the tropics get very active, you know who gets quiet. Same pattern most every time. That strategy helps make him/her effective. 
Aside from others, I'll eat some crow here. Granted, these two systems aren't from the MDR (which is still struggling due to the current pattern). Franklin formed out of a monsoon trough that collapsed. Idalia is the result of a CA surface trough. Either way, I gave up on the August window of activity. Not making excuses. We can have exceptions to the rule. Whether or not the MDR comes alive after Franklin and Idalia are gone will be the next course on the menu. It's still an El Niño year, but the Atlantic is now producing majors. Will it keep on keeping on remains to be seen.
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 The 0Z UKMET has a new TC forming in the far SE MDR at hour 78. This is for the AEW following the current E MDR orange. What's notable about it is that it is quite aggressive considering how conservative it usually is. It has it down to 999 mb at 168 hours at 12.9N, 40.7W, moving steadily WNW. That means it could threaten the LAs in 10 days. What should be concerning to the LAs is that the Euro has something similar along with notable members on the last several EPS runs. In addition, the GFS, CMC, and ICON have it though it looks to recurve on those:


0Z UKMET

NEW TROPICAL CYCLONE FORECAST TO DEVELOP AFTER  78 HOURS
              FORECAST POSITION AT T+ 78 :  9.7N  15.4W

                        LEAD                 CENTRAL     MAXIMUM WIND
      VERIFYING TIME    TIME   POSITION   PRESSURE (MB)  SPEED (KNOTS)
      --------------    ----   --------   -------------  -------------
    1200UTC 02.09.2023   84  10.3N  17.7W     1007            46
    0000UTC 03.09.2023   96  10.9N  19.0W     1007            34
    1200UTC 03.09.2023  108  12.1N  22.9W     1008            30
    0000UTC 04.09.2023  120  11.6N  26.7W     1008            28
    1200UTC 04.09.2023  132  11.7N  30.9W     1007            35
    0000UTC 05.09.2023  144  11.7N  34.9W     1004            36
    1200UTC 05.09.2023  156  12.2N  38.1W     1001            38
    0000UTC 06.09.2023  168  12.9N  40.7W      999            46

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The 12Z UKMET still has that MDR TC that the Euro and other models have though it isn't as strong as the 0Z:

NEW TROPICAL CYCLONE FORECAST TO DEVELOP AFTER  84 HOURS
              FORECAST POSITION AT T+ 84 : 10.1N  20.2W

                        LEAD                 CENTRAL     MAXIMUM WIND
      VERIFYING TIME    TIME   POSITION   PRESSURE (MB)  SPEED (KNOTS)
      --------------    ----   --------   -------------  -------------
    0000UTC 03.09.2023   84  10.1N  20.2W     1009            28
    1200UTC 03.09.2023   96  10.3N  22.8W     1009            25
    0000UTC 04.09.2023  108  12.1N  26.6W     1009            26
    1200UTC 04.09.2023  120  12.4N  30.5W     1008            27
    0000UTC 05.09.2023  132  12.9N  34.2W     1008            29
    1200UTC 05.09.2023  144  13.4N  38.2W     1007            31
    0000UTC 06.09.2023  156  13.9N  41.0W     1006            33
    1200UTC 06.09.2023  168  14.2N  44.3W     1004            38

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1 hour ago, cptcatz said:

Euro, CMC, Icon, and UK all show MDR development in 5 days. I wonder when we get a new lemon. This looks like it could be a long tracker ACE maker. 

 

Caveat: not that knowledgeable about tropical dynamics.

On the euro: It looks like there's quite a bit of shear present north of the Caribbean at 216. And that mid level trough extending to the tip of Fl seems like it'd keep it out of the Gulf and away from the eastern seaboard. Though by 244 looks like that trough might be breaking down.

Someone with more knowledge care to chime in?

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10 hours ago, NeffsvilleWx said:

 

Caveat: not that knowledgeable about tropical dynamics.

On the euro: It looks like there's quite a bit of shear present north of the Caribbean at 216. And that mid level trough extending to the tip of Fl seems like it'd keep it out of the Gulf and away from the eastern seaboard. Though by 244 looks like that trough might be breaking down.

Someone with more knowledge care to chime in?

It looks like there’s a strong TC genesis signal suggesting long track potential in the MDR, but honestly, given how the models have struggled so much with the steering pattern for Franklin and now with Idalia’s long term track I don’t put a lot of stock in having any sense of steering for maybe another week. 

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5 hours ago, WxWatcher007 said:

It looks like there’s a strong TC genesis signal suggesting long track potential in the MDR, but honestly, given how the models have struggled so much with the steering pattern for Franklin and now with Idalia’s long term track I don’t put a lot of stock in having any sense of steering for maybe another week. 

Aside from the timing (ie - imagine the steering pattern solutions were more reliable) -- is my overall take accurate?

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