FMS 12Z T3.0(突破德法限制) 40KT TROPICAL CYCLONE VAIANU CENTRE 992HPA WAS LOCATED NEAR 14.9S 172.2E AT 051200 UTC. POSITION POOR BASED ON HIMAWARI IR IMAGERY AND PERIPHERAL SURFACE REPORTS. CYCLONE MOVING SOUTH AT ABOUT 05 KNOTS. MAXIMUM 10-MINUTE AVERAGE WINDS NEAR THE CENTRE ESTIMATED AT ABOUT 40 KNOTS. EXPECT WINDS OVER 33 KNOTS WITHIN 110 NAUTICAL MILES IN E SEMICIRCLE AND WITHIN 70 NAUTICAL MILES IN W SEMICIRCLE DEEP CONVECTION REMAINS PERSISTENT OVER THE LLCC WITH PRIMARY BAND WRAPPING ONTO THE LLCC FROM THE NORTH. ORGANIZATION HAS IMPROVED SIGNIFICANTLY OVER THE PAST 24 HOURS. CYCLONIC CIRCULATION EXTENDS UP TO 400HPA. SYSTEM LIES IN A MODERATE UPPER DIVERGENT AREA WITH A GOOD POLEWARD OUTFLOW.CYCLONE LIES IN A LOW SHEARED ENVIRONMENT AND IS MOVING IN TO AN AREA OF DECREASING SHEAR. SST AOUND 29 DEGREES CELSIUS. DVORAK ANALYSIS BASED ON 0.7 WRAP YEILDS DT=3.0, PT= 3.5, MET=3.0. FT BASED ON DT. THUS, YEILDING T3.0/3.0/D1.5/24HRS. DVORAK FT CONTRAINT BROKEN.