000 FKPZ22 KNHC 212047 TCAPZ2 TROPICAL STORM GREG ICAO ADVISORY NUMBER 18 NWS NATIONAL HURRICANE CENTER MIAMI FL EP072017 2100 UTC FRI JUL 21 2017 TC ADVISORY DTG: 20170721/2100Z TCAC: KNHC TC: GREG NR: 018 PSN: N1454 W12042 MOV: W 11KT C: 1003HPA MAX WIND: 045KT FCST PSN + 06 HR: 220300 N1502 W12150 FCST MAX WIND + 06 HR: 045KT FCST PSN + 12 HR: 220900 N1509 W12257 FCST MAX WIND + 12 HR: 045KT FCST PSN + 18 HR: 221500 N1515 W12403 FCST MAX WIND + 18 HR: 050KT FCST PSN + 24 HR: 222100 N1521 W12509 FCST MAX WIND + 24 HR: 050KT RMK THE FORECAST POSITION INFORMATION IN THIS PRODUCT IS INTERPOLATED FROM OFFICIAL FORECAST DATA VALID AT 0000... 0600...1200...AND 1800Z. NXT MSG: 20170722/0300Z ..