ATL: ISAAC - Post-Tropical - Discussion

Moderator: S2k Moderators

Message
Author
User avatar
SoupBone
Category 5
Category 5
Posts: 3111
Joined: Tue Sep 20, 2005 5:24 pm

Re: ATL: NINE - Tropical Depression - Discussion

#241 Postby SoupBone » Sat Sep 08, 2018 9:22 am

Buck wrote:
SoupBone wrote:Something to consider this morning. Both the Euro and the GFS have it coming across the islands weak and then buries it into Honduras/ Nicaragua. Let's hope this begins a trend. It's very weak for the islands and the US mainland would miss it altogether.


Maybe this wasn't your intention, but I wouldn't ever wish a storm on Central America over the US.


In those runs, it's not a storm. It's a very weak system as it heads there (1009 pressure). And out of all the runs so far, it's a better solution than a GoM system heading towards the US coast, strengthening. Even the islands see a weak system.
0 likes   
Personal Forecast Disclaimer:
The posts in this forum are NOT official forecast and should not be used as such. They are just the opinion of the poster and may or may not be backed by sound meteorological data. They are NOT endorsed by any professional institution or storm2k.org. For official information, please refer to the NHC and NWS products.

User avatar
DestinHurricane
Category 4
Category 4
Posts: 935
Joined: Tue May 01, 2018 8:05 am
Location: New York, NY

Re: ATL: NINE - Tropical Depression - Discussion

#242 Postby DestinHurricane » Sat Sep 08, 2018 9:47 am

All storms in the east Caribbean track in September Image I know it wasn't in September but hurricane Dennis entered the far south Caribbean near Grenada and still made landfall as a cat 3 in the panhandle
0 likes   
Michael 2018

User avatar
cycloneye
Admin
Admin
Posts: 145299
Age: 68
Joined: Thu Oct 10, 2002 10:54 am
Location: San Juan, Puerto Rico

Re: ATL: NINE - Advisories

#243 Postby cycloneye » Sat Sep 08, 2018 9:56 am

Tropical Depression Nine Advisory Number 4
NWS National Hurricane Center Miami FL AL092018
1100 AM AST Sat Sep 08 2018

...DEPRESSION EXPECTED TO MOVE WESTWARD AND BECOME A TROPICAL STORM
LATER TODAY OVER THE EASTERN TROPICAL ATLANTIC...


SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION
-----------------------------------------------
LOCATION...14.6N 36.0W
ABOUT 1680 MI...2700 KM E OF THE WINDWARD ISLANDS
MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H
PRESENT MOVEMENT...WNW OR 300 DEGREES AT 6 MPH...9 KM/H
MINIMUM CENTRAL PRESSURE...1007 MB...29.74 INCHES



Tropical Depression Nine Discussion Number 4
NWS National Hurricane Center Miami FL AL092018
1100 AM AST Sat Sep 08 2018

The structure of Tropical Depression Nine is improving as the
ongoing shear diminishes, with the convection getting closer to the
low-level center. However, recent scatterometer data indicates
that the system has not yet become a tropical storm, and the
initial intensity remains 30 kt.

The cyclone is still moving fairly slowly, with the initial motion
now 300/5. The subtropical ridge to the north of the cyclone is
forecast to steer the system westward with an increasing forward
speed for at least the next 2-3 days. After that time, there is
some uncertainty in the track forecast due to the formation of a
mid- to upper-level trough over the central Atlantic. The Canadian
and UKMET models forecast the cyclone to slow down and turn
northwestward near the end of the forecast period due to the trough,
while the ECMWF and GFS show a continued westward motion. The track
forecast follows the ECMWF/GFS scenario and shows a faster westward
motion than the previous forecast. The new forecast also lies near
the various consensus models.

With the shear diminishing, conditions are becoming more favorable
for the cyclone to strengthen during the next 72 h. However, there
are still concerns about dry air entraining into the system. The
new intensity forecast is similar to the previous forecast with the
cyclone becoming a tropical storm in about 12 h and a hurricane in
about 72 h. After 72 h, the system is expected to encounter
another round of shear, which is expected to cause some weakening.


FORECAST POSITIONS AND MAX WINDS

INIT 08/1500Z 14.6N 36.0W 30 KT 35 MPH
12H 09/0000Z 14.7N 36.9W 35 KT 40 MPH
24H 09/1200Z 14.8N 38.5W 40 KT 45 MPH
36H 10/0000Z 14.8N 40.8W 50 KT 60 MPH
48H 10/1200Z 14.8N 43.5W 60 KT 70 MPH
72H 11/1200Z 14.5N 49.0W 75 KT 85 MPH
96H 12/1200Z 14.5N 55.0W 80 KT 90 MPH
120H 13/1200Z 14.5N 60.0W 75 KT 85 MPH

$$
Forecaster Beven
0 likes   
Visit the Caribbean-Central America Weather Thread where you can find at first post web cams,radars
and observations from Caribbean basin members Click Here

User avatar
HeeBGBz
Category 1
Category 1
Posts: 341
Age: 70
Joined: Sun Sep 03, 2006 3:25 pm
Location: Biloxi, MS

Re: ATL: NINE - Tropical Depression - Discussion

#244 Postby HeeBGBz » Sat Sep 08, 2018 10:52 am

Two of my employers are supposed to go to Puerto Rico this week. Should they, I wonder? Supposed to be there til next weekend. :eek:
0 likes   

User avatar
msbee
S2K Supporter
S2K Supporter
Posts: 3027
Joined: Wed Jun 11, 2003 10:11 am
Location: St. Maarten

Re: ATL: NINE - Tropical Depression - Discussion

#245 Postby msbee » Sat Sep 08, 2018 10:53 am

I just received this update from Crown Weather:
Tropical Depression #9:
5 am EDT/4 am CDT Statistics:
Location: 14.3 North Latitude, 35.4 West Longitude or about 1720 miles to the east of the Windward Islands.
Maximum Winds: 35 mph.
Minimum Central Pressure: 1007 Millibars or 29.74 Inches.
Forward Movement: West-Northwest at a forward speed of 5 mph.

The forecast for Tropical Depression #9 is a very uncertain one and all interests in the Lesser Antilles should closely monitor the progress of this system.

Satellite imagery and weather analysis indicates that TD 9 is being impacted by fairly robust wind shear and these unfavorable environmental conditions may continue for at least a few days. Should this occur, then the depression will struggle to strengthen and we may have a much weaker system moving into the Caribbean. This is what the latest European model and GFS model seems to suggest.

On the other hand, analysis reveals that there is an area of lower wind shear situated between 50 and 60 West Longitude and this system is likely to move through this region by about Wednesday. What may happen is that we could see a quick burst of intensification just before TD 9 moves across the Lesser Antilles late next week and this is something that will need to be monitored.

The intensity guidance is of no help with some members peaking this at a tropical storm while a equal number of members forecast a peak intensity of a Category 1 hurricane. The HWRF model's forecast of a Category 4 hurricane looks like a outlier and will be disregarded.

Tropical Depression 9 should move on a general west to west-northwest path for the next several days as a upper level ridge of high pressure pushes the system westward.

My Thinking Is That this system will end up tracking right across the southern Leeward Islands and northern Windward Islands on Thursday as a tropical storm. The islands that really need to keep an eye on this storm include Antigua, Guadeloupe, Dominica and Martinique. It should be noted that even though I'm currently forecasting this system to move across the central Lesser Antilles as a tropical storm, there is the very real possibility that it could be a Category 1 or 2 hurricane at that time.

Bottom line is that I strongly advise everyone in the southern Leeward Islands and the northern Windward Islands to closely monitor the progress of Tropical Depression #9.


from Rob at Crown Weather
0 likes   
Too many hurricanes to remember

plasticup

Re: ATL: NINE - Tropical Depression - Discussion

#246 Postby plasticup » Sat Sep 08, 2018 10:54 am

HeeBGBz wrote:Two of my employers are supposed to go to Puerto Rico this week. Should they, I wonder? Supposed to be there til next weekend. :eek:

Far too early to tell
0 likes   

User avatar
cycloneye
Admin
Admin
Posts: 145299
Age: 68
Joined: Thu Oct 10, 2002 10:54 am
Location: San Juan, Puerto Rico

ATL: ISAAC - Recon

#247 Postby cycloneye » Sat Sep 08, 2018 12:07 pm

BEGIN 6-HRLY FIXES ON TROPICAL
DEPRESSION NINE AT 12/1130Z.
1 likes   
Visit the Caribbean-Central America Weather Thread where you can find at first post web cams,radars
and observations from Caribbean basin members Click Here

User avatar
MississippiWx
S2K Supporter
S2K Supporter
Posts: 1699
Joined: Sat Aug 14, 2010 1:44 pm
Location: Hattiesburg, Mississippi

Re: ATL: NINE - Tropical Depression - Discussion

#248 Postby MississippiWx » Sat Sep 08, 2018 12:34 pm

I believe the fate of this storm depends on how quickly it can strengthen. The models that have it weak in the Caribbean don’t really develop it much from the start. If it’s able to begin intensification soon then I believe it will approach the islands as a hurricane. It will also be able to battle any increase in shear once in the Caribbean. Of course, the longer it takes to organize, the less chance it has of ever being much of anything. The Eastern Caribbean is a graveyard for developing systems.
1 likes   
This post is not an official forecast and should not be used as such. It is just the opinion of MississippiWx and may or may not be backed by sound meteorological data. It is not endorsed by any professional institution including storm2k.org. For Official Information please refer to the NHC and NWS products.

User avatar
SoupBone
Category 5
Category 5
Posts: 3111
Joined: Tue Sep 20, 2005 5:24 pm

Re: ATL: NINE - Tropical Depression - Discussion

#249 Postby SoupBone » Sat Sep 08, 2018 12:40 pm

Of course it can and usually does change, but shear has been increasing in the entire path of TD9, with the exception of a sweet spot right before the islands. Maybe that's why the NHC is showing some potential for intensification right before the islands. The GFS has been fairly consistent in its path, and the Euro jumped on board the due west track, crashing into Honduras/Nicaragua as a very weak system, then poof.

Image
0 likes   
Personal Forecast Disclaimer:
The posts in this forum are NOT official forecast and should not be used as such. They are just the opinion of the poster and may or may not be backed by sound meteorological data. They are NOT endorsed by any professional institution or storm2k.org. For official information, please refer to the NHC and NWS products.

User avatar
Gustywind
Category 5
Category 5
Posts: 12334
Joined: Mon Sep 03, 2007 7:29 am
Location: Baie-Mahault, GUADELOUPE

Re: ATL: NINE - Recon

#250 Postby Gustywind » Sat Sep 08, 2018 1:05 pm

cycloneye wrote:
BEGIN 6-HRLY FIXES ON TROPICAL
DEPRESSION NINE AT 12/1130Z.

:roll: waouw here we are.
0 likes   

User avatar
USVIKimmie
Tropical Depression
Tropical Depression
Posts: 51
Joined: Fri Sep 07, 2018 10:12 pm

Re: ATL: NINE - Recon

#251 Postby USVIKimmie » Sat Sep 08, 2018 1:12 pm

What base are they coming from?
0 likes   

KAlexPR
Tropical Low
Tropical Low
Posts: 32
Joined: Tue May 23, 2017 11:47 am

Re: ATL: NINE - Tropical Depression - Discussion

#252 Postby KAlexPR » Sat Sep 08, 2018 1:57 pm

Looks like we have Isaac:

AL, 09, 2018090818, , BEST, 0, 145N, 363W, 35, 1005, TS
5 likes   

User avatar
CyclonicFury
Category 5
Category 5
Posts: 2025
Age: 26
Joined: Sun Jul 02, 2017 12:32 pm
Location: NC
Contact:

Re: ATL: NINE - Tropical Depression - Discussion

#253 Postby CyclonicFury » Sat Sep 08, 2018 1:59 pm

Impressive to see Isaac and we haven't even reached peak day yet. Not exactly a quiet season so far.
2 likes   
NCSU B.S. in Meteorology Class of 2021. Tropical weather blogger at http://www.cyclonicfury.com. My forecasts and thoughts are NOT official, for official forecasts please consult the National Hurricane Center.

User avatar
cycloneye
Admin
Admin
Posts: 145299
Age: 68
Joined: Thu Oct 10, 2002 10:54 am
Location: San Juan, Puerto Rico

Re: ATL: NINE - Recon

#254 Postby cycloneye » Sat Sep 08, 2018 2:01 pm

USVIKimmie wrote:What base are they coming from?


ST Croix.
1 likes   
Visit the Caribbean-Central America Weather Thread where you can find at first post web cams,radars
and observations from Caribbean basin members Click Here

User avatar
Gustywind
Category 5
Category 5
Posts: 12334
Joined: Mon Sep 03, 2007 7:29 am
Location: Baie-Mahault, GUADELOUPE

Re: ATL: NINE - Tropical Depression - Discussion

#255 Postby Gustywind » Sat Sep 08, 2018 3:05 pm

KAlexPR wrote:Looks like we have Isaac:

AL, 09, 2018090818, , BEST, 0, 145N, 363W, 35, 1005, TS

Any link? please. Thanks :)
0 likes   

User avatar
Blinhart
Category 5
Category 5
Posts: 2079
Age: 48
Joined: Thu Sep 08, 2011 3:13 pm
Location: Crowley, La.

Re: ATL: NINE - Tropical Depression - Discussion

#256 Postby Blinhart » Sat Sep 08, 2018 3:11 pm

Why do I have Harvey on my mind with this system?
0 likes   
Personal Forecast Disclaimer:
The posts in this forum are NOT official forecast and should not be used as such. They are just the opinion of the poster and may or may not be backed by sound meteorological data. They are NOT endorsed by any professional institution or storm2k.org. For official information, please refer to the NHC and NWS products.

User avatar
Blinhart
Category 5
Category 5
Posts: 2079
Age: 48
Joined: Thu Sep 08, 2011 3:13 pm
Location: Crowley, La.

Re: ATL: NINE - Recon

#257 Postby Blinhart » Sat Sep 08, 2018 3:14 pm

Are they gonna be dropping dropsondes at high altitude while flying to TD9/TS Isaac so can get all kind of data from high up all the way down to the surface?
0 likes   
Personal Forecast Disclaimer:
The posts in this forum are NOT official forecast and should not be used as such. They are just the opinion of the poster and may or may not be backed by sound meteorological data. They are NOT endorsed by any professional institution or storm2k.org. For official information, please refer to the NHC and NWS products.

setxweathergal64
Tropical Depression
Tropical Depression
Posts: 56
Joined: Sat May 26, 2018 8:59 am

Re: ATL: NINE - Tropical Depression - Discussion

#258 Postby setxweathergal64 » Sat Sep 08, 2018 3:20 pm

Is there anything in place or due to be in place to steer this in a certain direction. I'm in Tx and really hoping it fizzles. Harvey did enough damage for a lifetime. :cry:
0 likes   
Texas Strong ❤

User avatar
WAcyclone
Category 1
Category 1
Posts: 352
Joined: Sat Jul 01, 2017 1:56 pm
Location: Perth, Western Australia

Re: ATL: NINE - Tropical Depression - Discussion

#259 Postby WAcyclone » Sat Sep 08, 2018 3:27 pm

...
Last edited by WAcyclone on Sat Sep 08, 2018 3:32 pm, edited 2 times in total.
0 likes   

OURAGAN
Category 1
Category 1
Posts: 451
Joined: Sat Aug 07, 2004 12:18 pm
Location: GUADELOUPE

Re: ATL: NINE - Tropical Depression - Discussion

#260 Postby OURAGAN » Sat Sep 08, 2018 3:29 pm

At NRL 1005 MB and 35 KNOTS, we will have Isaac at 5 PM
0 likes   


Return to “2018”

Who is online

Users browsing this forum: No registered users and 3 guests