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Post-Tropical Cyclone ANA (Text)


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Post-Tropical Cyclone Ana Discussion Number   8
NWS National Hurricane Center Miami FL       AL012021
1100 PM AST Sun May 23 2021
 
Ana has mainly remained devoid of deep and organized convection 
today, with only a couple of short-lived bursts noted in satellite 
imagery earlier this morning. The cyclone has been an exposed cloud 
swirl through the afternoon and evening hours, and Ana continues 
moving into a hostile environment characterized by cool sea-surface 
temperatures, dry mid-level air, and increasing vertical wind shear. 
Thus, Ana has become a post-tropical cyclone, and this will be the 
final NHC advisory on the system.
 
Although a recent ASCAT-B pass missed the center of post-tropical 
Ana, it still shows an area of 30-35 kt winds in the southeast 
quadrant of the low near the edge of the swath. Therefore, the 
initial intensity is set at 35 kt, with the slightly stronger winds 
likely just a product of the accelerating forward speed of the 
system. The post-tropical cyclone is embedded in deep-layer 
southwesterly flow and will continue to accelerate northeastward 
until it opens up into a trough and becomes absorbed by a strong 
baroclinic zone approaching from the northwest on Monday.
 
Additional information on post-tropical Ana can be found in High 
Seas Forecasts issued by the National Weather Service, under AWIPS 
header NFDHSFAT1, WMO header FZNT01 KWBC, and online at 
ocean.weather.gov/shtml/NFDHSFAT1.php
 
 
FORECAST POSITIONS AND MAX WINDS
 
INIT  24/0300Z 38.3N  55.2W   35 KT  40 MPH...POST-TROPICAL
 12H  24/1200Z 41.0N  50.5W   30 KT  35 MPH...POST-TROP/REMNT LOW
 24H  25/0000Z...DISSIPATED
 
$$
Forecaster Reinhart/Brown
 
NNNN

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Page last modified: Friday, 15-Oct-2021 12:09:05 UTC