499  
FKNT25 KNHC 231445  
TCANT5  
 
HURRICANE TAMMY ICAO ADVISORY NUMBER 21  
NWS NATIONAL HURRICANE CENTER MIAMI FL AL202023  
1500 UTC MON OCT 23 2023  
 
TC ADVISORY  
DTG: 20231023/1500Z  
TCAC: KNHC  
TC: TAMMY  
ADVISORY NR: 2023/021  
OBS PSN: 23/1500Z N2154 W06354  
MOV: N 06KT  
INTST CHANGE: NC  
C: 0993HPA  
MAX WIND: 070KT  
FCST PSN +3 HR: 23/1800Z N2209 W06344  
FCST MAX WIND +3 HR: 070KT  
FCST PSN +9 HR: 24/0000Z N2242 W06324  
FCST MAX WIND +9 HR: 070KT  
FCST PSN +15 HR: 24/0600Z N2309 W06254  
FCST MAX WIND +15 HR: 075KT  
FCST PSN +21 HR: 24/1200Z N2336 W06224  
FCST MAX WIND +21 HR: 075KT  
FCST PSN +27 HR: 24/1800Z N2403 W06148  
FCST MAX WIND +27 HR: 080KT  
RMK: THE FORECAST POSITION INFORMATION IN  
THIS PRODUCT IS INTERPOLATED FROM  
OFFICIAL FORECAST DATA VALID AT 0000...  
0600...1200...AND 1800Z.  
NXT MSG: 20231023/2100Z  
 

 
 
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