Tropical Storm VICKY Advisory di, 15-09

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Tropical Storm Vicky Discussion Number   5
NWS National Hurricane Center Miami FL       AL212020
500 AM AST Tue Sep 15 2020

Vicky remains sheared this morning with strong upper-level winds
causing any deep convection to be located northeast of the center.
The low-level circulation has also become distorted as well, with
new bursts of convection causing the mean circulation to re-form to
the north.  The initial wind speed is kept 45 kt since the system
isn't appreciably different than the last cycle.  Models all weaken
the storm during the next couple of days due to rather potent
westerly shear (with 200-mb westerly winds as high as 70 kt
forecast across Vicky's circulation).  These extremely harsh
conditions should make the intensity prediction rather simple, and
Vicky is likely to decay into a remnant low within a day or two
and open up into a trough in a few days.

The re-formation of the center leads to an uncertain motion
estimate of 325/8 kt.  The storm should turn west-northwestward
later today and westward on Wednesday as it becomes steered by the
low-level subtropical ridge.  Little change was made to the
previous forecast, except for a small northward adjustment in the
first day or so of the prediction due to the initial position.


FORECAST POSITIONS AND MAX WINDS

INIT  15/0900Z 20.3N  30.1W   45 KT  50 MPH
 12H  15/1800Z 21.0N  31.2W   40 KT  45 MPH
 24H  16/0600Z 21.7N  33.1W   35 KT  40 MPH
 36H  16/1800Z 22.2N  35.1W   30 KT  35 MPH...POST-TROP/REMNT LOW
 48H  17/0600Z 22.5N  37.0W   30 KT  35 MPH...POST-TROP/REMNT LOW
 60H  17/1800Z 22.5N  38.5W   25 KT  30 MPH...POST-TROP/REMNT LOW
 72H  18/0600Z 22.5N  40.5W   20 KT  25 MPH...POST-TROP/REMNT LOW
 96H  19/0600Z...DISSIPATED

$$
Forecaster Blake