000 FKNT24 KNHC 242046 TCANT4 HURRICANE HARVEY ICAO ADVISORY NUMBER 18 NWS NATIONAL HURRICANE CENTER MIAMI FL AL092017 2100 UTC THU AUG 24 2017 TC ADVISORY DTG: 20170824/2100Z TCAC: KNHC TC: HARVEY NR: 018 PSN: N2442 W09354 MOV: NNW 09KT C: 0976HPA MAX WIND: 075KT FCST PSN + 06 HR: 250300 N2514 W09430 FCST MAX WIND + 06 HR: 090KT FCST PSN + 12 HR: 250900 N2548 W09506 FCST MAX WIND + 12 HR: 100KT FCST PSN + 18 HR: 251500 N2624 W09542 FCST MAX WIND + 18 HR: 105KT FCST PSN + 24 HR: 252100 N2658 W09610 FCST MAX WIND + 24 HR: 110KT RMK THE FORECAST POSITION INFORMATION IN THIS PRODUCT IS INTERPOLATED FROM OFFICIAL FORECAST DATA VALID AT 0000... 0600...1200...AND 1800Z. NXT MSG: 20170825/0300Z ..