000 FKPZ23 KNHC 210835 TCAPZ3 TROPICAL STORM DOUGLAS ICAO ADVISORY NUMBER 4 NWS NATIONAL HURRICANE CENTER MIAMI FL EP082020 0900 UTC TUE JUL 21 2020 TC ADVISORY DTG: 20200721/0900Z TCAC: KNHC TC: DOUGLAS ADVISORY NR: 2020/004 OBS PSN: 21/0900Z N1300 W12248 MOV: WSW 12KT C: 0999HPA MAX WIND: 050KT FCST PSN +6 HR: 21/1500Z N1239 W12356 FCST MAX WIND +6 HR: 055KT FCST PSN +12 HR: 21/2100Z N1225 W12507 FCST MAX WIND +12 HR: 060KT FCST PSN +18 HR: 22/0300Z N1216 W12622 FCST MAX WIND +18 HR: 065KT FCST PSN +24 HR: 22/0900Z N1213 W12740 FCST MAX WIND +24 HR: 070KT RMK: THE FORECAST POSITION INFORMATION IN THIS PRODUCT IS INTERPOLATED FROM OFFICIAL FORECAST DATA VALID AT 0000... 0600...1200...AND 1800Z. NXT MSG: 20200721/1500Z ??