712  
WTNT44 KNHC 130834  
TCDAT4  
 
POST-TROPICAL CYCLONE ETA DISCUSSION NUMBER 52  
NWS NATIONAL HURRICANE CENTER MIAMI FL AL292020  
400 AM EST FRI NOV 13 2020  
 
WHILE THE CYCLONE IS STILL GENERATING A CLUSTER OF STRONG  
CONVECTION TO THE NORTHEAST OF THE CENTER, SATELLITE IMAGERY,  
SURFACE OBSERVATIONS AND SCATTEROMETER DATA INDICATE THAT ETA HAS  
MERGED WITH A BAROCLINIC ZONE AND BECOME AN EXTRATROPICAL CYCLONE  
OFF THE SOUTHEASTERN COAST OF THE UNITED STATES. THE SCATTEROMETER  
DATA SHOWED VECTORS OF 40-50 KT ALONG A FRONT OR CONVERGENCE ZONE  
NORTHEAST OF THE CENTER, BUT THESE VECTORS WERE IN THE STRONG  
CONVECTIVE REGION AND THEIR RELIABILITY IS UNCERTAIN. THIS, THE  
INITIAL INTENSITY IS HELD AT A POSSIBLY CONSERVATIVE 40 KT. ETA IS  
FORECAST TO STRENGTHEN AS A BAROCLINIC LOW UNTIL THE SYSTEM IS  
ABSORBED BY ANOTHER LOW PRESSURE AREA IN ABOUT 48 H.  
 
THE INITIAL MOTION IS 060/18. THE POST-TROPICAL CYCLONE CYCLONE  
SHOULD CONTINUE THIS GENERAL MOTION WITH AN INCREASE IN FORWARD  
SPEED UNTIL IT IS ABSORBED.  
 
THIS IS THE LAST ADVISORY ISSUED BY THE NATIONAL HURRICANE CENTER  
ON ETA. ADDITIONAL INFORMATION ON THIS SYSTEM 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 13/0900Z 33.3N 76.8W 40 KT 45 MPH...POST-TROP/EXTRATROP  
12H 13/1800Z 35.0N 73.1W 40 KT 45 MPH...POST-TROP/EXTRATROP  
24H 14/0600Z 37.9N 66.1W 45 KT 50 MPH...POST-TROP/EXTRATROP  
36H 14/1800Z 41.1N 57.8W 45 KT 50 MPH...POST-TROP/EXTRATROP  
48H 15/0600Z...ABSORBED BY AN EXTRATROPICAL LOW  
 

 
FORECASTER BEVEN  
 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab TPC Page Main Text Page