000 FKNT24 KNHC 250846 TCANT4 HURRICANE HARVEY ICAO ADVISORY NUMBER 20 NWS NATIONAL HURRICANE CENTER MIAMI FL AL092017 0900 UTC FRI AUG 25 2017 TC ADVISORY DTG: 20170825/0900Z TCAC: KNHC TC: HARVEY NR: 020 PSN: N2554 W09524 MOV: NW 08KT C: 0967HPA MAX WIND: 090KT FCST PSN + 06 HR: 251500 N2634 W09600 FCST MAX WIND + 06 HR: 100KT FCST PSN + 12 HR: 252100 N2710 W09630 FCST MAX WIND + 12 HR: 105KT FCST PSN + 18 HR: 260300 N2743 W09654 FCST MAX WIND + 18 HR: 105KT FCST PSN + 24 HR: 260900 N2807 W09710 FCST MAX WIND + 24 HR: 095KT RMK THE FORECAST POSITION INFORMATION IN THIS PRODUCT IS INTERPOLATED FROM OFFICIAL FORECAST DATA VALID AT 0000... 0600...1200...AND 1800Z. NXT MSG: 20170825/1500Z ..