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Tropical Storm Victor Forecast Discussion

WTNT45 KNHC 021448

Tropical Storm Victor Discussion Number  13
NWS National Hurricane Center Miami FL       AL202021
1100 AM AST Sat Oct 02 2021

Strong southwesterly shear and entrainment of dry air have taken 
their toll on Victor. The deep convection and the remnant mid-level 
core has been stripped away from the cyclone's low-level 
circulation, and is now more than 250 n mi northeast of Victor's 
center. The most recent UW-CIMMS shear analysis indicates the shear 
magnitude is about 30 kt over the center of the cyclone, and nearly 
50 kt just to its north. The initial intensity is being lowered to 
35 kt for this advisory based on the latest subjective Dvorak 
intensity estimate from TAFB. However, this value could be generous.

Victor's vector is 305/10 kt. This motion is expected to continue 
until the system dissipates, as the cyclone is steered in the flow 
to the southwest of a subtropical ridge. The latest NHC track 
forecast is just slightly to the left of the previous one, and lies 
on the western side of the guidance envelope to accommodate the 
shallow nature of the circulation. 

The strong shear is not forecast to abate over the cyclone for the 
foreseeable future and very dry, African dust-laden air lies in 
the path of Victor. Therefore, it is unlikely that organized deep 
convection will redevelop near the center of the cyclone. Because of 
this, Victor is now expected to become a remnant low by tonight. The 
remnant low is forecast by the global models to open into a trough 
in 60 h. Due to the quick weakening that has been observed, the 
latest NHC intensity forecast was lowered through the first 12 h, 
and then remains the same as the previous forecast beyond that time 


INIT  02/1500Z 13.1N  37.2W   35 KT  40 MPH
 12H  03/0000Z 14.1N  38.7W   30 KT  35 MPH...POST-TROP/REMNT LOW
 24H  03/1200Z 15.9N  40.8W   30 KT  35 MPH...POST-TROP/REMNT LOW
 36H  04/0000Z 18.0N  42.8W   25 KT  30 MPH...POST-TROP/REMNT LOW
 48H  04/1200Z 20.0N  44.6W   20 KT  25 MPH...POST-TROP/REMNT LOW
 60H  05/0000Z 21.6N  46.7W   20 KT  25 MPH...POST-TROP/REMNT LOW
 72H  05/1200Z...DISSIPATED

Forecaster Latto

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