000 FKNT21 KNHC 111452 TCANT1 TROPICAL STORM IRMA ICAO ADVISORY NUMBER 50 NWS NATIONAL HURRICANE CENTER MIAMI FL AL112017 1500 UTC MON SEP 11 2017 TC ADVISORY DTG: 20170911/1500Z TCAC: KNHC TC: IRMA NR: 050 PSN: N3018 W08306 MOV: NNW 15KT C: 0975HPA MAX WIND: 055KT FCST PSN + 06 HR: 112100 N3126 W08402 FCST MAX WIND + 06 HR: 050KT FCST PSN + 12 HR: 120300 N3228 W08501 FCST MAX WIND + 12 HR: 045KT FCST PSN + 18 HR: 120900 N3325 W08604 FCST MAX WIND + 18 HR: 035KT FCST PSN + 24 HR: 121500 N3410 W08703 FCST MAX WIND + 24 HR: 030KT RMK THE FORECAST POSITION INFORMATION IN THIS PRODUCT IS INTERPOLATED FROM OFFICIAL FORECAST DATA VALID AT 0000... 0600...1200...AND 1800Z. NXT MSG: 20170911/2100Z ..