000 FKNT25 KNHC 312044 TCANT5 POST-TROPICAL CYCLONE IDALIA ICAO ADVISORY NUMBER 21 NWS NATIONAL HURRICANE CENTER MIAMI FL AL102023 2100 UTC THU AUG 31 2023 TC ADVISORY DTG: 20230831/2100Z TCAC: KNHC TC: IDALIA ADVISORY NR: 2023/021 OBS PSN: 31/2100Z N3330 W07330 MOV: E 18KT INTST CHANGE: INTSF C: 0994HPA MAX WIND: 055KT FCST PSN +3 HR: 01/0000Z N3320 W07236 FCST MAX WIND +3 HR: 055KT FCST PSN +9 HR: 01/0600Z N3300 W07048 FCST MAX WIND +9 HR: 050KT FCST PSN +15 HR: 01/1200Z N3224 W06933 FCST MAX WIND +15 HR: 050KT FCST PSN +21 HR: 01/1800Z N3148 W06818 FCST MAX WIND +21 HR: 045KT FCST PSN +27 HR: 02/0000Z N3124 W06730 FCST MAX WIND +27 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: 20230901/0300Z $$