ATL: GAMMA - Post-Tropical - Discussion

[xironman]

Has TT change their IR, that's a lot of pink

[Kingarabian]

Has TT change their IR, that's a lot of pink
https://i.imgur.com/gM6kNwV.jpg

It's legit. Very cold cloud tops over Gamma. Power of the W-Caribbean.

[NXStumpy_Robothing]

Caribbean magic strikes again.

The recent recon mission has found some evidence of 50kt winds around the center of the storm, as well as an enhanced band of around 45-50kt between the Island of Cozumel and the greater Yucatan Peninsula. Pressure also dropped 2mb between passes. Seems like the trend of storms intensifying until landfall (only bucked by Marco and Teddy) is going to continue.

[GCANE]

2mb drop on every pass

[GCANE]

Kermit also in the air.

[GCANE]

Outflow from Gamma is taking out a big chunk of the dry air behind the front.

[Ryxn]

Not gonna lie, Gamma is looking pretty impressive at the moment, all things considered...

[Hurricane Mike]

Impressive shape and outflow. Trying hard to become a hurricane before striking the Yucatan. Doubt it gets there.

[GCANE]

A large, high-helicity hot tower has developed west of the CoC and is rotating CCW.

[GCANE]

Recon now reporting an eyewall
Maybe the beginning of RI


Product: Air Force Vortex Message (URNT12 KNHC)
Transmitted: 3rd day of the month at 11:02Z

A. Time of Center Fix: 3rd day of the month at 10:31:40Z
B. Center Fix Coordinates: 19.57N 87.02W

F. Eye Character: Open in the north
G. Eye Shape: Elliptical (oval shaped)

[GCANE]

[GCANE]

2nd hot tower now developing on opposite side of CoC and also rotating.
Very likely RI underway.

[GCANE]

Kermit flying at 645mb.
Slightly above 700mb hurricane-mode level.
Reporting 983.9mb extrap surface pressure.

[GCANE]

[ElectricStorm]

Wow Gamma looking very healthy this morning... Yet another storm strengthening before landfall... Cat 1 looks very possible at this point, maybe even likely

[GCANE]

Eye drop
987 mb
77% RH at 700mb

[aspen]

Wow, Gamma is impressive. Yet another victory for the HWRF — it got this exact structure right in yesterday’s 12z run.

Gamma’s incredibly deep CDO and much tighter pressure gradient suggests it would’ve been able to reach major hurricane intensity if it wasn’t about to run out of water.

[HurricaneAndre2008]

598
WTNT35 KNHC 031144
TCPAT5

BULLETIN
Tropical Storm Gamma Intermediate Advisory Number 4A
NWS National Hurricane Center Miami FL AL252020
700 AM CDT Sat Oct 03 2020

...GAMMA STRENGTHENS SOME MORE AS IT APPROACHES THE EAST COAST OF
THE YUCATAN PENINSULA...


SUMMARY OF 700 AM CDT...1200 UTC...INFORMATION
----------------------------------------------
LOCATION...19.7N 87.2W
ABOUT 40 MI...65 KM SSE OF TULUM MEXICO
MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H
PRESENT MOVEMENT...NW OR 305 DEGREES AT 9 MPH...15 KM/H
MINIMUM CENTRAL PRESSURE...987 MB...29.15 INCHES

[HurricaneAndre2008]

TXNT26 KNES 031201
TCSNTL

A. 25L (GAMMA)

B. 03/1133Z

C. 19.9N

D. 87.0W

E. THREE/GOES-E

F. T3.5/3.5

G. IR/EIR/SWIR

H. REMARKS...A LLCC THAT IS GREATER THAN 0.33 DEGREES INTO THE DG COLD
OVERCAST MAKES THE DT EQUAL TO 3.5 USING THE SHEAR PATTERN. THE MET AND
PT AGREE AND ARE ALSO EQUAL TO 3.5 BASED ON A RAPID DEVELOPMENT TREND
OVER THE PAST 24 HOURS. THE FT IS BASED ON THE MET DUE TO UNCERTAINTY
WITH THE EXACT LLCC POSITION UNDER THE COLD OVERCAST IN SATELLITE IMAGERY.

I. ADDL POSITIONS

NIL


...SAMBUCCI

[HurricaneAndre2008]

TXNT26 KNES 031201
TCSNTL

A. 25L (GAMMA)

B. 03/1133Z

C. 19.9N

D. 87.0W

E. THREE/GOES-E

F. T3.5/3.5

G. IR/EIR/SWIR

H. REMARKS...A LLCC THAT IS GREATER THAN 0.33 DEGREES INTO THE DG COLD
OVERCAST MAKES THE DT EQUAL TO 3.5 USING THE SHEAR PATTERN. THE MET AND
PT AGREE AND ARE ALSO EQUAL TO 3.5 BASED ON A RAPID DEVELOPMENT TREND
OVER THE PAST 24 HOURS. THE FT IS BASED ON THE MET DUE TO UNCERTAINTY
WITH THE EXACT LLCC POSITION UNDER THE COLD OVERCAST IN SATELLITE IMAGERY.

I. ADDL POSITIONS

NIL


...SAMBUCCI