593 FKNT23 KNHC 222051 TCANT3 TROPICAL DEPRESSION EIGHTEEN ICAO ADVISORY NUMBER 1 NWS NATIONAL HURRICANE CENTER MIAMI FL AL182021 2100 UTC WED SEP 22 2021 TC ADVISORY DTG: 20210922/2100Z TCAC: KNHC TC: EIGHTEEN ADVISORY NR: 2021/001 OBS PSN: 22/2100Z N1006 W03354 MOV: W 13KT INTST CHANGE: NC C: 1008HPA MAX WIND: 030KT FCST PSN +6 HR: 23/0300Z N1006 W03518 FCST MAX WIND +6 HR: 035KT FCST PSN +12 HR: 23/0900Z N1012 W03639 FCST MAX WIND +12 HR: 035KT FCST PSN +18 HR: 23/1500Z N1024 W03757 FCST MAX WIND +18 HR: 040KT FCST PSN +24 HR: 23/2100Z N1037 W03913 FCST MAX WIND +24 HR: 045KT RMK: THE FORECAST POSITION INFORMATION IN THIS PRODUCT IS INTERPOLATED FROM OFFICIAL FORECAST DATA VALID AT 0000... 0600...1200...AND 1800Z. NXT MSG: 20210923/0300Z $$