FMS:T4.0 55KT

TROPICAL CYCLONE VAIANU CENTRE 975HPA CATEGORY 2 WAS LOCATED NEAR
15.6S 173.1E AT 060000 UTC. POSITION POOR BASED ON HIMAWARI IR
IMAGERY AND PERIPHERAL SURFACE REPORTS. CYCLONE MOVING SOUTHEAST AT
ABOUT 05 KNOTS. MAXIMUM 10-MINUTE AVERAGE WINDS NEAR THE CENTRE
ESTIMATED AT ABOUT 55 KNOTS.
EXPECT WINDS OVER 47 KNOTS WITHIN 40 NAUTICAL MILES OF CENTRE AND
EXPECT WINDS OVER 33 KNOTS WITHIN 120 NAUTICAL MILES IN NE QUADRANT
AND WITHIN 120 NAUTICAL MILES IN SE QUADRANT
AND WITHIN 90 NAUTICAL MILES IN SW QUADRANT
AND WITHIN 90 NAUTICAL MILES IN NW QUADRANT
DEEP CONVECTION REMAINS PERSISTENT OVER THE LLCC AND ORGANIZATION
REMAINS GOOD. CYCLONIC CIRCULATION EXTENDS UP TO 300HPA. SYSTEM LIES
IN A GOOD UPPER DIVERGENT AREA WITH A GOOD POLEWARD OUTFLOW. CYCLONE
LIES IN A LOW SHEARED ENVIRONMENT. SST AROUND 29 DEGREES CELSIUS.
DVORAK ANALYSIS BASED ON 1.0 WRAP WITH W BAND YIELDS DT=4.0, PT=4.0
MET=3.0. FT BASED ON PT. THUS, YIELDING T4.0/4.0/D1.5/24HRS.