Atlantic Basin Tropical Cyclones

Tropical Depression Eleven Forecast Discussion

WTNT41 KNHC 291439

Tropical Depression Eleven Discussion Number   5
NWS National Hurricane Center Miami FL       AL112022
1100 AM AST Thu Sep 29 2022

The overnight deep convective burst with Tropical Depression Eleven 
did not appear to help spin up its low-level circulation. In fact, 
morning visible satellite imagery suggest that the circulation is 
actually losing definition, and may already be in the process of 
opening up into a surface trough. For now, we will continue writing 
advisories on the system, pending scatterometer data expected later 
today. The latest intensity was held at 30 kt based on the CI 
numbers from TAFB and SAB. If the current trends on visible 
satellite imagery continue, the system may be declared either 
post-tropical or dissipated as soon as this afternoon. Vertical wind 
shear only increases from here on out as the mid-level relative 
humidity remains quite low, so it looks increasingly unlikely the 
structure can recover. The NHC intensity forecast shows more 
immediate weakening but is generally in line with the intensity 
guidance consensus.

The initial motion appears to still be off to the northwest, just a
bit faster at 320/12 kt. This general motion is expected to
continue until the system dissipates, as the system is steered
generally by a low-level ridge that has nosed in to the northeast of
the depression. The updated track is quite similar, but just a
touch west, of the prior track, remaining close to the consensus


INIT  29/1500Z 19.1N  37.4W   30 KT  35 MPH
 12H  30/0000Z 20.6N  38.7W   25 KT  30 MPH...POST-TROP/REMNT LOW
 24H  30/1200Z 22.8N  40.4W   25 KT  30 MPH...POST-TROP/REMNT LOW
 36H  01/0000Z...DISSIPATED

Forecaster Papin

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