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Tropical Depression Kevin Discussion Number 20
NWS National Hurricane Center Miami FL EP112021
200 AM PDT Thu Aug 12 2021
Kevin is barely a tropical cyclone, as its exposed low-level center
has been displaced over 100 n mi northeast of a few small bursts of
convection for most of the night. In fact, the last semblance of
organized convection with this sheared cyclone ended around 11/2100
UTC. If Kevin is unable to generate any organized convection soon,
the system could be declared a post-tropical remnant low later this
morning. Overnight ASCAT-A/B passes only showed 25 to 30-kt winds,
primarily in the eastern semicircle of Kevin. Therefore, the initial
intensity is lowered to 30 kt for this advisory, which makes Kevin a
tropical depression.
Based on recent scatterometer fixes, it appears the broad center of
Kevin is moving slightly more west-northwestward than before, or
295/10 kt. A general west-northwest to northwest motion should
continue through dissipation as the system moves along the
southwestern side of a deep-layer ridge. The track guidance remains
in good agreement, and the official NHC track forecast has been
nudged slightly southward from the previous one based on the initial
motion adjustment.
The cyclone is already north of the 26 deg C isotherm, and it will
move over progressively cooler waters and into a drier, more stable
environment during the next couple of days. Thus, the development of
new, organized convection near Kevin's center seems very unlikely.
The official NHC forecast now shows Kevin degenerating to a remnant
low later today, in agreement with the latest GFS and ECMWF model
simulated satellite imagery. The remnant low should gradually spin
down over the next couple of days before dissipating this weekend.
FORECAST POSITIONS AND MAX WINDS
INIT 12/0900Z 22.3N 119.3W 30 KT 35 MPH
12H 12/1800Z 23.2N 121.0W 25 KT 30 MPH...POST-TROP/REMNT LOW
24H 13/0600Z 24.4N 123.5W 25 KT 30 MPH...POST-TROP/REMNT LOW
36H 13/1800Z 25.8N 125.7W 20 KT 25 MPH...POST-TROP/REMNT LOW
48H 14/0600Z 27.4N 127.6W 20 KT 25 MPH...POST-TROP/REMNT LOW
60H 14/1800Z 29.0N 129.0W 20 KT 25 MPH...POST-TROP/REMNT LOW
72H 15/0600Z...DISSIPATED
$$
Forecaster Reinhart/Cangialosi
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