Low Pressure in the Central Atlantic (Is Invest 91L)

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sma10
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Re: Tropical Wave SW of the Cabo Verde Islands

#341 Postby sma10 » Fri Aug 26, 2022 9:53 pm

NXStumpy_Robothing wrote:I don't understand why we continue to be so reactionary on here with regards to this wave; this interaction between the two lobes was well-forecasted in advance by most modeling solutions and illustrates that we are still 2-3 days away from TCG, again in line with modeling. We're going to need to wait until after these two competing vortmaxes within the larger monsoon trough determine a victor or find a way to combine their vorticity before we can expect there to be a TC. See Isaias's genesis from 2020 for a similar example.

Even now, new convection is firing over the well-defined mid-level spin which is very close to closing off at the surface. I don't see a reason to worry unless it stays anemic through dmax (which looks unlikely). I'd also be very surprised (given the near-universal model consensus for TCG within the next week) for this to not develop at this point.

Just another situation where you have to monitor what's happening with short-term satellite trends and modeling solutions, as is often the case. Going to be an interesting few days with this wave regardless.


Agreed, don't quite understand the reactions either. Euro has been extremely consistent in not developing this system until it has time to wobble around each other and loop-di-loop.

You'd think the fact that since it is actually following the Euro design that people would be MORE confident in its solution?
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Re: Tropical Wave SW of the Cabo Verde Islands

#342 Postby Hammy » Fri Aug 26, 2022 9:56 pm



A lot more organized at the surface than I realized. I expected there'd be no east winds south of 13-14N
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Re: Tropical Wave SW of the Cabo Verde Islands

#343 Postby Hurricaneman » Fri Aug 26, 2022 10:06 pm

Seems as though we’re coming out of D-min and convection is firing again around the possible center, could close it off if it isn’t already
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Re: Tropical Wave SW of the Cabo Verde Islands

#344 Postby SFLcane » Fri Aug 26, 2022 10:09 pm

Hurricaneman wrote:Seems as though we’re coming out of D-min and convection is firing again around the possible center, could close it off if it isn’t already


Yea was about to comment on this. Convection once again firing with decent amount of lighting.

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Re: Tropical Wave SW of the Cabo Verde Islands

#345 Postby chaser1 » Fri Aug 26, 2022 10:13 pm

Certainly seeing plenty of turning just not all in one place. Thats not a knock against development but rather a bigger question mark regarding (potential) eventual track. Especially now, trust the trend not the models
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Re: Tropical Wave SW of the Cabo Verde Islands

#346 Postby tolakram » Fri Aug 26, 2022 10:18 pm

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Re: Tropical Wave SW of the Cabo Verde Islands

#347 Postby Category5Kaiju » Fri Aug 26, 2022 10:21 pm

The fact that this system is at a decently low latitude with warm ssts below it and shielded away from all of the dry air to the north is really doing it favors, isn't it? :lol:
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Re: Tropical Wave SW of the Cabo Verde Islands

#348 Postby Sciencerocks » Fri Aug 26, 2022 10:44 pm

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Re: Tropical Wave SW of the Cabo Verde Islands

#349 Postby skyline385 » Fri Aug 26, 2022 10:52 pm

ICON 0Z ends at a 965mb which is pretty high considering the model's typically very conservative runs.

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Re: Tropical Wave SW of the Cabo Verde Islands

#350 Postby caneseddy » Fri Aug 26, 2022 11:03 pm

skyline385 wrote:ICON 0Z ends at a 965mb which is pretty high considering the model's typically very conservative runs.

https://s4.gifyu.com/images/icon_mslp_pcpn_atl_fh120-180.gif


That’s very low pressure for Icon to show. Also you can see at the end of the run what looks to be the beginning of a turn to the west north of the islands..
Last edited by caneseddy on Fri Aug 26, 2022 11:05 pm, edited 1 time in total.
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Re: Tropical Wave SW of the Cabo Verde Islands

#351 Postby chaser1 » Fri Aug 26, 2022 11:04 pm

Category5Kaiju wrote:The fact that this system is at a decently low latitude with warm ssts below it and shielded away from all of the dry air to the north is really doing it favors, isn't it? :lol:


To our eyes? Perhaps not. Unless of course this diurnal dance is merely "Mayhem" giving us the finger while picking HER spot :cheesy:
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Re: Tropical Wave SW of the Cabo Verde Islands

#352 Postby Hybridstorm_November2001 » Fri Aug 26, 2022 11:32 pm

Thankfully, I'm skeptical the Icon will verify given the current environmental conditions.
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Re: Tropical Wave SW of the Cabo Verde Islands

#353 Postby skyline385 » Fri Aug 26, 2022 11:33 pm

0Z GFS run very weak at 165 hrs, not even a TS but its probably because of the gulf cane
Last edited by skyline385 on Fri Aug 26, 2022 11:36 pm, edited 1 time in total.
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Re: Tropical Wave SW of the Cabo Verde Islands

#354 Postby sma10 » Fri Aug 26, 2022 11:36 pm

Hybridstorm_November2001 wrote:Thankfully, I'm skeptical the Icon will verify given the current environmental conditions.


ICON doesn't really do anything with the system for the next 4.5 days. All the strengthening occurs way down the road
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Re: Tropical Wave SW of the Cabo Verde Islands

#355 Postby Hurricaneman » Fri Aug 26, 2022 11:45 pm

skyline385 wrote:0Z GFS run very weak at 165 hrs, not even a TS but its probably because of the gulf cane


Still slightly stronger than the 18z but could be trending towards the Euro in track so this could still be a problem especially if the GFS is underestimating the longer term like it did several times in the past
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Re: Tropical Wave SW of the Cabo Verde Islands

#356 Postby LarryWx » Sat Aug 27, 2022 12:04 am

0Z UKMET: forms 12 hours earlier and 100 miles south of the 12Z along with a left turn toward more westerly late vs the 12Z showing more WNW to NW move late. Similar to the 12Z, it remains a TD:

NEW TROPICAL CYCLONE FORECAST TO DEVELOP AFTER 84 HOURS
FORECAST POSITION AT T+ 84 : 12.4N 45.9W

LEAD CENTRAL MAXIMUM WIND
VERIFYING TIME TIME POSITION PRESSURE (MB) SPEED (KNOTS)
-------------- ---- -------- ------------- -------------
1200UTC 30.08.2022 84 12.4N 45.9W 1009 28
0000UTC 31.08.2022 96 12.4N 46.2W 1008 27
1200UTC 31.08.2022 108 13.8N 46.8W 1008 30
0000UTC 01.09.2022 120 15.0N 48.7W 1007 30
1200UTC 01.09.2022 132 15.8N 50.6W 1006 31
0000UTC 02.09.2022 144 16.1N 52.7W 1004 29
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Re: Tropical Wave SW of the Cabo Verde Islands

#357 Postby Fancy1001 » Sat Aug 27, 2022 12:07 am

I’m just curious whether this forms officially on August 31 or September 1
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Re: Tropical Wave SW of the Cabo Verde Islands

#358 Postby Hammy » Sat Aug 27, 2022 12:20 am

Canadian has development, meanwhile GFS doesn't. GFS really struggling with the monsoon trough setup here
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Re: Tropical Wave SW of the Cabo Verde Islands

#359 Postby Hybridstorm_November2001 » Sat Aug 27, 2022 12:36 am

sma10 wrote:
Hybridstorm_November2001 wrote:Thankfully, I'm skeptical the Icon will verify given the current environmental conditions.


ICON doesn't really do anything with the system for the next 4.5 days. All the strengthening occurs way down the road


I'll be surprised if by then the Atlantic has become significantly less hostile so as to allow such a scenario. The trend is your friend, thus far this season the Basin has been extremely hostile to TCs, luckily. :spam:
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Re: Tropical Wave SW of the Cabo Verde Islands

#360 Postby skyline385 » Sat Aug 27, 2022 1:11 am

0Z ECMWF starts off very strong but then suddenly seems to weaken around 60 hours into a broad circulation :?:
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