ATL: TAMMY - Post-Tropical - Discussion

[cycloneye]

Does anyone has a microwave image of Tammy?

[Hurricane2022]

Does anyone has a microwave image of Tammy?

 https://twitter.com/WxTca/status/1715181876326084792

[cycloneye]

It will be interesting what occurs overnight.

 https://twitter.com/AndyHazelton/status/1715200960488784021

[Hurricane Mike]

Video Update on Tammy for those interested
https://www.youtube.com/watch?v=MTczPQPodvw

[ThunderForce]

Does anyone has a microwave image of Tammy?

[ElectricStorm]

All four hurricane models now have Tammy becoming a significant hurricane north of the islands, and 3 of the 4 have it becoming a hurricane within the next 12 hours before weakening near the islands before re-strengthening again. Not sure I completely buy the short term hurricane solution yet but given tonight's trends it's not impossible. Looks like it's pretty likely Tammy ends up becoming much stronger than I originally expected it to.

[Hurricane Mike]

Tammy's cloudtops are sure firing quite well. Looking slightly better on Barbados radar, too.

[cycloneye]

For our friends in the islands, here are the updated watches and warnings from the 5 AM advisory.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Hurricane Watch is in effect for...
* Guadeloupe
* Antigua and Barbuda, Montserrat, St. Kitts and Nevis, and Anguilla
* St. Maarten
* St. Martin and St. Barthelemy

A Tropical Storm Warning is in effect for...
* Dominica
* Guadeloupe
* Antigua and Barbuda, Montserrat, St. Kitts and Nevis, and Anguilla
* St. Maarten
* St. Martin and St. Barthelemy
* Saba and St. Eustatius

A Tropical Storm Watch is in effect for...
* Barbados
* Martinique

[aspen]

Looks like there’s some moderate vortex tilt and maybe even attempts at a center reformation, based on the last few recon passes. NOAA3 at ~2500 gpm found the center NW of AF309 at ~3200 gpm. Winds seem to be up to 55-60 kt.

[Weatherwatcher2018]

I’m curious, is Barbados out of the woods?

[aspen]

Looks like a tight center has formed. 50 kt FL, 70 kt SFMR, 994/20 from AF309. NOAA3 is finding 65 kt FL and 60 kt SFMR as it enters the center form the N.

[ChrisH-UK]

Tammy looks to be in good health.

[zzzh]

Dropsonde confirmed the 992mb. (994mb/20kt wind)

[ChrisH-UK]

Over on the Barbados weather radar looks like Tammy is trying to wrap around its circulation.

https://www.barbadosweather.org/Radars/ ... oducts.php

[IsabelaWeather]

Appears to be moving due W on the barbados radar. Core building pretty quickly.

[zzzh]

612
WTNT65 KNHC 201401
TCUAT5

Hurricane Tammy Tropical Cyclone Update
NWS National Hurricane Center Miami FL AL202023
1000 AM AST Fri Oct 20 2023

...TAMMY BECOMES A HURRICANE...

NOAA and Air Force Reserve hurricane hunter aircraft data indicate
that Tammy has become a hurricane. The maximum winds are estimated
to be 75 mph (120 km/h) with higher gusts. The initial and forecast
intensities will be updated with the next advisory that will be
issued at 1100 AM AST (1500 UTC).

SUMMARY OF 1000 AM AST...1400 UTC...INFORMATION
-----------------------------------------------
LOCATION...14.1N 58.5W
ABOUT 90 MI...150 KM NE OF BARBADOS
ABOUT 170 MI...275 KM ESE OF MARTINIQUE
MAXIMUM SUSTAINED WINDS...75 MPH...120 KM/H
PRESENT MOVEMENT...WNW OR 290 DEGREES AT 7 MPH...11 KM/H
MINIMUM CENTRAL PRESSURE...992 MB...29.29 INCHES

$$
Forecaster Brown

[kevin]

There is the 7th hurricane of the season.

[Sciencerocks]

[tolakram]

Crazy how so many conditions are favorable that all it takes is are a few hours of decent upper level winds for a storm to blow up.

floater: https://weather.cod.edu/satrad/?parms=meso-meso1-02-24-0-100-1&checked=map&colorbar=undefined

[tolakram]

saved loop