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Tropical Depression Twelve Discussion Number 6
NWS National Hurricane Center Miami FL AL122022
1100 PM AST Wed Oct 05 2022
Occasional pulses of deep convection with cloud top temperatures
below -70 C continue to occur near and to the northeast of the
center of the tropical depression. We finally were able to receive
some scatterometer data near the system, with the highest
non-flagged wind retrievals of 28 and 32 kts from both ASCAT-B/C
passes. Subjective and objective Dvorak T-numbers have been
decreasing, but in deference to the higher scatterometer data, the
initial intensity was held at 30 kt for this advisory. The
southwesterly vertical wind shear over the depression is now above
30 kts, and is expected to increase further over the next 24 hours.
This highly unfavorable environment should ultimately lead to the
system's demise as the remaining deep convection is stripped
completely away from the low-level circulation. The intensity
forecast still shows the depression becoming a remnant low in 24
hours and then opening up into a trough in 48 hours, though this
could occur as soon as tomorrow morning.
The depression has made a northward jog this evening, but smoothing
out the 12 hour motion results in a northwest heading at 320/11 kt.
A northwest to west-northwest motion is expected to continue until
the system becomes a remnant low or dissipates in 24-48 hours. The
NHC track has been adjusted a bit northward due to the initial
position, but ends up near the previous forecast track in about 48
hours, following along with the consensus aids.
FORECAST POSITIONS AND MAX WINDS
INIT 06/0300Z 17.7N 32.5W 30 KT 35 MPH
12H 06/1200Z 18.7N 33.6W 30 KT 35 MPH
24H 07/0000Z 19.4N 35.8W 30 KT 35 MPH...POST-TROP/REMNT LOW
36H 07/1200Z 20.3N 38.2W 25 KT 30 MPH...POST-TROP/REMNT LOW