000 FKNT24 KNHC 180842 TCANT4 TROPICAL STORM HARVEY ICAO ADVISORY NUMBER 4 NWS NATIONAL HURRICANE CENTER MIAMI FL AL092017 0900 UTC FRI AUG 18 2017 TC ADVISORY DTG: 20170818/0900Z TCAC: KNHC TC: HARVEY NR: 004 PSN: N1306 W05906 MOV: W 16KT C: 1004HPA MAX WIND: 035KT FCST PSN + 06 HR: 181500 N1310 W06050 FCST MAX WIND + 06 HR: 035KT FCST PSN + 12 HR: 182100 N1316 W06234 FCST MAX WIND + 12 HR: 035KT FCST PSN + 18 HR: 190300 N1325 W06419 FCST MAX WIND + 18 HR: 040KT FCST PSN + 24 HR: 190900 N1336 W06606 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: 20170818/1500Z ..