000 FKNT24 KNHC 241747 TCANT4 HURRICANE HARVEY SPECIAL ICAO ADVISORY NUMBER 17 NWS NATIONAL HURRICANE CENTER MIAMI FL AL092017 1800 UTC THU AUG 24 2017 TC ADVISORY DTG: 20170824/1800Z TCAC: KNHC TC: HARVEY NR: 017 PSN: N2424 W09336 MOV: NNW 09KT C: 0979HPA MAX WIND: 075KT FCST PSN + 06 HR: 242100 N2439 W09354 FCST MAX WIND + 06 HR: 080KT FCST PSN + 12 HR: 250300 N2510 W09428 FCST MAX WIND + 12 HR: 090KT FCST PSN + 18 HR: 250900 N2543 W09501 FCST MAX WIND + 18 HR: 100KT FCST PSN + 24 HR: 251500 N2619 W09533 FCST MAX WIND + 24 HR: 105KT RMK THE FORECAST POSITION INFORMATION IN THIS PRODUCT IS INTERPOLATED FROM OFFICIAL FORECAST DATA VALID AT 0000... 0600...1200...AND 1800Z. NXT MSG: 20170824/2100Z ..