ATL: ISAAC - Post-Tropical - Discussion

[Gustywind]

First appearence on SSD...

05/1745 UTC 13.1N 28.2W TOO WEAK 92L
05/1200 UTC 13.1N 27.0W T1.0/1.0 92L

[StruThiO]

[GCANE]

Tropical Cyclone Formation Alert posted

[cycloneye]

From the San Juan NWS:

.LONG TERM...Sunday through Thursday...

Fair weather conditions are expected to prevail between Sunday
and Monday, as the local islands remain under influence of the
upper level ridge to the west and the upper level low to the
northeast of the region. However, diurnally induced afternoon
showers are expected each afternoon, over the interior and western
sections of Puerto Rico. As the upper level low moves west on
Tuesday and Wednesday, upper level dynamics should be favorable
for thunderstorms to develop over western Puerto Rico. By the end
of the long term period, models disagree considerably with the
evolution of an area of low pressure currently located a few miles
southwest of the Cabo Verde Islands. Based on the 06/00z model
data, the GFS is having a faster solution and bringing the system
into the eastern Caribbean by the end of the week, and a slower
solution is presented by the ECMWF with the system remaining over
the open Atlantic waters. This area of low pressure is currently
being monitored by the National Hurricane Center and more
information can be found on the Tropical Weather Outlook (TWOAT)
and on future discussion by the National Weather Service San Juan
Office..

[SFLcane]

Interesting that now some of the models such as the gfs do not show 92L getting picked up in the wake left by Florence instead it heads right for the islands. Will be watching this one for sure

[cycloneye]

8 AM TWO:

1. A broad and elongated area of low pressure is centered several
hundred miles west-southwest of the Cabo Verde Islands. The
associated shower and thunderstorm activity has changed little in
organization since yesterday, and there are no indications yet that
the system has a well-defined center of circulation. However,
environmental conditions are conducive for development, and a
tropical depression is expected to form within the next few days
while the system moves slowly westward or west-northwestward across
the tropical Atlantic Ocean.
* Formation chance through 48 hours...high...70 percent.
* Formation chance through 5 days...high...90 percent.

[Gustywind]

TWD really emphasizes on the fact that conditions are conducive for development . Let's monitor it closely as it treks towards the west or wnw...

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
749 AM EDT Thu Sep 6 2018


A broad and elongated area of low pressure is centered several hundred miles west-southwest of the Cabo Verde Islands near 13N30W.
A tropical wave extends along 30W between 03N20N. The associated shower and thunderstorm activity has changed little in
organization since yesterday, and there are no indications yet that the system has a well-defined center of circulation.
However,environmental conditions are conducive for development, and a tropical depression is expected to form within the next few days while the system moves slowly westward or west- northwestward across the tropical Atlantic. The chance of this system becoming a tropical cyclone during the next 48 hours is high.

[Gustywind]

Invest 92L
As of 12:00 UTC Sep 06, 2018:

https://www.tropicaltidbits.com/storminfo/
Location: 13.5°N 31.2°W
Maximum Winds: 25 kt Gusts: N/A
Minimum Central Pressure: 1008 mb
Environmental Pressure: 1011 mb
Radius of Circulation: 210 NM
Radius of Maximum Wind: 80 NM

[cycloneye]

Invest 92L
As of 12:00 UTC Sep 06, 2018:

https://www.tropicaltidbits.com/storminfo/
Location: 13.5°N 31.2°W
Maximum Winds: 25 kt Gusts: N/A
Minimum Central Pressure: 1008 mb
Environmental Pressure: 1011 mb
Radius of Circulation: 210 NM
Radius of Maximum Wind: 80 NM

[Gustywind]

Invest 92L
As of 12:00 UTC Sep 06, 2018:

https://www.tropicaltidbits.com/storminfo/
Location: 13.5°N 31.2°W
Maximum Winds: 25 kt Gusts: N/A
Minimum Central Pressure: 1008 mb
Environmental Pressure: 1011 mb
Radius of Circulation: 210 NM
Radius of Maximum Wind: 80 NM

Great job Luis . Thanks for posting that chart.

[knotimpaired]

Go North, go North,go way North!
Tomorrow is the one year anniversary of Hurricane Irma tearing St Maarten apart. We are still in recovery. Another storm would NOT be in our best interests!

Agree 100%. PR too is still in recovery mode after Maria as more than 150,000 homes are with the blue tarps and the power grid is still fragil.

If you were in my living room looking out right now, you would see my toilet, sink, etc, from my downstairs bathroom. Jackhammers are singing, thanks to Maria. Vieques and Culebra are already down to one ferry, for both islands. We do not need this, many are suffering from ptsd from Maria, this is the last thing we need

[BatzVI]

The US Virgin Islands are still in recovery mode, especially St. Thomas and St. John after getting nailed by both Irma and Maria. We don't need this.

[chris_fit]

No looking so far like a miss on the 12z GFS

[Kosmo Kitty]

If this one becomes named, which name will it get? Helena?

[Extratropical94]

If this one becomes named, which name will it get? Helena?

Helene

[cycloneye]

2 PM TWO: 80%/90%

The circulation associated with an area of low pressure centered
several hundred miles west-southwest of the Cabo Verde Islands
remains broad and elongated, and the associated shower and
thunderstorm activity has not yet increased in organization.
However, environmental conditions are conducive for development, and
a tropical depression is expected to form within the next day or two
while the system moves slowly westward or west-northwestward across
the tropical Atlantic Ocean.
* Formation chance through 48 hours...high...80 percent.
* Formation chance through 5 days...high...90 percent.

[GoDawgs]

The US Virgin Islands are still in recovery mode, especially St. Thomas and St. John after getting nailed by both Irma and Maria. We don't need this.

I hope it avoids the USVI/BVI. We go to St. Thomas/St. John every year as it's our favorite place on earth...went a month before Irma and also in April of this year. They do not need this...many people are still recovering. Fingers crossed.

[cycloneye]

18z Best Track:

Location: 14.0°N 32.5°W
Maximum Winds: 25 kt Gusts: N/A
Minimum Central Pressure: 1008 mb
Environmental Pressure: 1010 mb
Radius of Circulation: 210 NM
Radius of Maximum Wind: 80 NM

[chris_fit]

I see lots of popcorn popping as the sun sets on 92L

[otowntiger]

I see lots of popcorn popping as the sun sets on 92L

looks every bit as good as Florence does now, lol!