Official Discussion issued by the National Hurricane Center

Vicky (AL212020) DATA RELEASED: 9/17/2020 3:00:00 AM UTC

Copy of official data

Tropical Storm Vicky Discussion Number  12
NWS National Hurricane Center Miami FL       AL212020
1100 PM AST Wed Sep 16 2020

A layer of cirrus clouds are covering the center of Vicky, but those 
clouds are associated with outflow from Hurricane Teddy.  A 
combination of outflow from Teddy and an upper-level low to the 
north of Vicky is causing very strong westerly winds across the top 
of the struggling tropical storm. As a result, Vicky is producing 
minimal convection that is displaced to the east of the center. 
Recent ASCAT data indicated that the maximum winds are still near 
35 kt, but Vicky's wind field is becoming smaller and the system is 
on the overall decline. There is no indication that the shear will 
decrease and Vicky should weaken as a result. The NHC forecast calls 
for Vicky to become a remnant low within 24 hours (if not sooner) 
and dissipate in a few days.

Vicky is still heading generally westward. The tropical storm will 
likely continue westward through tomorrow morning, and then turn 
west-southwestward in the low-level tradewind flow after that for as 
long as it lasts. There is little spread in the track guidance and 
the NHC forecast is essentially the same as the multi-model 


INIT  17/0300Z 21.6N  35.8W   35 KT  40 MPH
12H  17/1200Z 21.6N  37.1W   35 KT  40 MPH
24H  18/0000Z 21.0N  39.0W   30 KT  35 MPH...POST-TROP/REMNT LOW
36H  18/1200Z 20.2N  40.6W   25 KT  30 MPH...POST-TROP/REMNT LOW
48H  19/0000Z 19.4N  42.3W   25 KT  30 MPH...POST-TROP/REMNT LOW
60H  19/1200Z...DISSIPATED

Forecaster Zelinsky