ATL: ISAIAS - Models

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toad strangler
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Re: ATL: NINE - Models

#901 Postby toad strangler » Tue Jul 28, 2020 11:13 am

Fay 2.0 on 12z GFS
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Re: ATL: NINE - Models

#902 Postby Hypercane_Kyle » Tue Jul 28, 2020 11:13 am

Even as a slightly stronger system, 09L is unable to survive the sheer in the Bahamas. Needs to strengthen a lot more in order to do that.
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Re: ATL: NINE - Models

#903 Postby Blown Away » Tue Jul 28, 2020 11:18 am

Image

12z GFS...TS/TD as it nears SFL, then crawls for a few days over the peninsula = torrential rain...
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Re: ATL: NINE - Models

#904 Postby TheStormExpert » Tue Jul 28, 2020 11:29 am

Hypercane_Kyle wrote:Even as a slightly stronger system, 09L is unable to survive the sheer in the Bahamas. Needs to strengthen a lot more in order to do that.

Yes there will be Southwesterly shear but an anti-cyclone is forecasted to stay almost on top of PTC-9 all the way to Florida. It’s the dry air that’s the biggest problem.
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Re: ATL: NINE - Models

#905 Postby TheStormExpert » Tue Jul 28, 2020 11:32 am

gatorcane wrote:
toad strangler wrote:12z poofing this right of the SE FL Coast @126hrs


Yet the model shows a very favorable upper-level wind pattern that sets up as it approaches SE Florida. Hot water, slow moving, system. Hmmm...

https://i.postimg.cc/L4vgxfHT/gfs-shear-watl-22.png

Dry air.

Image
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Re: ATL: NINE - Models

#906 Postby gatorcane » Tue Jul 28, 2020 11:32 am

CMC is a bit stronger and shifted west. Looks like it will landfall in SoFlo in the low 990mbs.
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Re: ATL: NINE - Models

#907 Postby ColdMiser123 » Tue Jul 28, 2020 11:33 am

UKMET significantly stronger:

NEW TROPICAL CYCLONE FORECAST TO DEVELOP AFTER 24 HOURS
FORECAST POSITION AT T+ 24 : 15.3N 61.1W

LEAD CENTRAL MAXIMUM WIND
VERIFYING TIME TIME POSITION PRESSURE (MB) SPEED (KNOTS)
-------------- ---- -------- ------------- -------------
1200UTC 29.07.2020 24 15.3N 61.1W 1006 36
0000UTC 30.07.2020 36 16.7N 63.7W 1004 40
1200UTC 30.07.2020 48 18.0N 66.5W 1003 46
0000UTC 31.07.2020 60 18.9N 68.6W 1002 46
1200UTC 31.07.2020 72 20.0N 70.6W 1002 45
0000UTC 01.08.2020 84 20.8N 73.6W 1002 44
1200UTC 01.08.2020 96 21.9N 75.5W 1003 40
0000UTC 02.08.2020 108 23.3N 76.8W 1001 45
1200UTC 02.08.2020 120 24.9N 77.7W 996 47
0000UTC 03.08.2020 132 26.5N 78.1W 990 51
1200UTC 03.08.2020 144 28.1N 78.5W 985 53
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Re: ATL: NINE - Models

#908 Postby WeatherEmperor » Tue Jul 28, 2020 11:34 am

12z Canadian has a strong TS/Cat 1 about to make landfall in South Florida. Not liking this at all.....

Image


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Re: ATL: NINE - Models

#909 Postby Evil Jeremy » Tue Jul 28, 2020 11:36 am

WeatherEmperor wrote:12z Canadian has a strong TS/Cat 1 about to make landfall in South Florida. Not liking this at all.....

https://uploads.tapatalk-cdn.com/202007 ... 977387.jpg


Sent from my iPhone using Tapatalk


102 hours, too... The timeline for this keeps getting faster.
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Re: ATL: NINE - Models

#910 Postby gatorcane » Tue Jul 28, 2020 11:36 am

ColdMiser123 wrote:UKMET significantly stronger:

NEW TROPICAL CYCLONE FORECAST TO DEVELOP AFTER 24 HOURS
FORECAST POSITION AT T+ 24 : 15.3N 61.1W

LEAD CENTRAL MAXIMUM WIND
VERIFYING TIME TIME POSITION PRESSURE (MB) SPEED (KNOTS)
-------------- ---- -------- ------------- -------------
1200UTC 29.07.2020 24 15.3N 61.1W 1006 36
0000UTC 30.07.2020 36 16.7N 63.7W 1004 40
1200UTC 30.07.2020 48 18.0N 66.5W 1003 46
0000UTC 31.07.2020 60 18.9N 68.6W 1002 46
1200UTC 31.07.2020 72 20.0N 70.6W 1002 45
0000UTC 01.08.2020 84 20.8N 73.6W 1002 44
1200UTC 01.08.2020 96 21.9N 75.5W 1003 40
0000UTC 02.08.2020 108 23.3N 76.8W 1001 45
1200UTC 02.08.2020 120 24.9N 77.7W 996 47
0000UTC 03.08.2020 132 26.5N 78.1W 990 51
1200UTC 03.08.2020 144 28.1N 78.5W 985 53


And it is intensifying it as it moves through the Bahamas, ends up close to South Florida.
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Re: ATL: NINE - Models

#911 Postby Evil Jeremy » Tue Jul 28, 2020 11:52 am

HWRF is running... Through 39 hours, it's further S and W at the same point than any of the previous 3 cycles. Looks like it's going to clip Puerto Rico.
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Re: RE: Re: ATL: NINE - Models

#912 Postby jlauderdal » Tue Jul 28, 2020 11:55 am

WeatherEmperor wrote:12z Canadian has a strong TS/Cat 1 about to make landfall in South Florida. Not liking this at all.....

Image


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I dont like that track at all, anything coming in from that trajectory is dangerous, look for an intensity increase from nhc
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Re: ATL: NINE - Models

#913 Postby SFLcane » Tue Jul 28, 2020 11:58 am

HWRF barely misses PR Still intensifying...

Image
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Re: ATL: NINE - Models

#914 Postby AutoPenalti » Tue Jul 28, 2020 12:00 pm

Where’s the dry air the HWRF was forecasting within 72hrs?
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Model Runs Cheat Sheet:
GFS (5:30 AM/PM, 11:30 AM/PM)
HWRF, GFDL, UKMET, NAVGEM (6:30-8:00 AM/PM, 12:30-2:00 AM/PM)
ECMWF (1:45 AM/PM)

TCVN
is a weighted averaged

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Re: ATL: NINE - Models

#915 Postby Hypercane_Kyle » Tue Jul 28, 2020 12:02 pm

TheStormExpert wrote:
gatorcane wrote:
toad strangler wrote:12z poofing this right of the SE FL Coast @126hrs


Yet the model shows a very favorable upper-level wind pattern that sets up as it approaches SE Florida. Hot water, slow moving, system. Hmmm...

https://i.postimg.cc/L4vgxfHT/gfs-shear-watl-22.png

Dry air.

https://i.ibb.co/56sqB9k/gfs-mid-RH-watl-22.png


Appears to be so. I can tell you I've never seen dry air kill a storm completely near Florida in late-July.
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Re: RE: Re: ATL: NINE - Models

#916 Postby jlauderdal » Tue Jul 28, 2020 12:03 pm

AutoPenalti wrote:Where’s the dry air the HWRF was forecasting within 72hrs?
Where are the OTS posts from 48 hrs ago...the dry air idea is way overdone, this system will thrive if it stays off the pr and dr but a trip over or south of those islands is not a crazy idea
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Re: ATL: NINE - Models

#917 Postby SFLcane » Tue Jul 28, 2020 12:03 pm

AutoPenalti wrote:Where’s the dry air the HWRF was forecasting within 72hrs?


Hurricane 987mb near Cuba. RH looks good thus far through 50hrs
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Re: ATL: NINE - Models

#918 Postby supercane4867 » Tue Jul 28, 2020 12:04 pm

12z HWRF is stronger in the short term than last run.
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Re: ATL: NINE - Models

#919 Postby AutoPenalti » Tue Jul 28, 2020 12:05 pm

SFLcane wrote:
AutoPenalti wrote:Where’s the dry air the HWRF was forecasting within 72hrs?


Hurricane 987mb near Cuba. RH looks good thus far through 50hrs

Yikes. Add 4mb for correction and that’s a Cat 1.
Last edited by AutoPenalti on Tue Jul 28, 2020 12:06 pm, edited 1 time in total.
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The posts in this forum are NOT official forecasts 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. For official information, please refer to products from the NHC and NWS.


Model Runs Cheat Sheet:
GFS (5:30 AM/PM, 11:30 AM/PM)
HWRF, GFDL, UKMET, NAVGEM (6:30-8:00 AM/PM, 12:30-2:00 AM/PM)
ECMWF (1:45 AM/PM)

TCVN
is a weighted averaged

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Re: ATL: NINE - Models

#920 Postby sma10 » Tue Jul 28, 2020 12:06 pm

I really wouldn't buy in completely on the GFS just poofing the system into nothing, as really no other model does this. In fact, uk now shows strengthening as well as CMC and HWRF. Seeing the miss on Hanna last week should keep everyone's eyes wide open, as we know that particular area of the basin is notorious
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