000 FKPZ21 KNHC 160856 TCAPZ1 TROPICAL STORM ALVIN ICAO ADVISORY NUMBER 4 NWS NATIONAL HURRICANE CENTER MIAMI FL EP012013 0900 UTC THU MAY 16 2013 TC ADVISORY DTG: 20130516/0900Z TCAC: KNHC TC: ALVIN NR: 004 PSN: N0906 W10654 MOV: WNW 09KT C: 1003HPA MAX WIND: 045KT FCST PSN + 06 HR: 161500 N0922 W10746 FCST MAX WIND + 06 HR: 050KT FCST PSN + 12 HR: 162100 N0940 W10836 FCST MAX WIND + 12 HR: 055KT FCST PSN + 18 HR: 170300 N1001 W10924 FCST MAX WIND + 18 HR: 060KT FCST PSN + 24 HR: 170900 N1024 W11013 FCST MAX WIND + 24 HR: 060KT RMK THE FORECAST POSITION INFORMATION IN THIS PRODUCT IS INTERPOLATED FROM OFFICIAL FORECAST DATA VALID AT 0000... 0600...1200...AND 1800Z. NXT MSG: 20130516/1500Z $$