000 FKNT23 KNHC 172038 TCANT3 POST-TROPICAL CYCLONE GERT ICAO ADVISORY NUMBER 20 NWS NATIONAL HURRICANE CENTER MIAMI FL AL082017 2100 UTC THU AUG 17 2017 TC ADVISORY DTG: 20170817/2100Z TCAC: KNHC TC: GERT NR: 020 PSN: N4448 W04600 MOV: ENE 34KT C: 0985HPA MAX WIND: 055KT FCST PSN + 06 HR: 180300 N4648 W04220 FCST MAX WIND + 06 HR: 050KT FCST PSN + 12 HR: 180900 N4830 W03925 FCST MAX WIND + 12 HR: 045KT FCST PSN + 18 HR: 181500 N4954 W03716 FCST MAX WIND + 18 HR: 040KT FCST PSN + 24 HR: 182100 N5104 W03554 FCST MAX WIND + 24 HR: 040KT RMK THE FORECAST POSITION INFORMATION IN THIS PRODUCT IS INTERPOLATED FROM OFFICIAL FORECAST DATA VALID AT 0000... 0600...1200...AND 1800Z. NXT MSG: NO MSG EXP $$