WTIO30 FMEE 181224                                              2009322 1226
RSMC / TROPICAL CYCLONE CENTRE / LA REUNION
TROPICAL CYCLONE TECHNICAL BULLETIN (SOUTH-WEST INDIAN OCEAN)
0.A WARNING NUMBER                 : 18/4/20092010
1.A TROPICAL DISTURBANCE 4  (EX-ANJA)
2.A POSITION 2009/11/18 AT 1200 UTC :
WITHIN 20 NM RADIUS OF POINT 22.9S / 67.1E
(TWENTY TWO DECIMAL NINE DEGREES SOUTH AND SIXTY SEVEN DECIMAL ONE
DEGREES EAST)
MOVEMENT : SOUTH-SOUTH-EAST 15 KT
3.A DVORAK ANALYSIS                : 1.5/2.0 /W  0.5/6 H
4.A CENTRAL PRESSURE               : 1003 HPA
5.A MAX AVERAGE WIND SPEED (10 MN) : 25 KT
 RADIUS OF MAXIMUM WINDS (RMW) : NIL
6.A EXTENSION OF WINDS BY QUADRANTS (KM):
NIL
7.A FIRST CLOSED ISOBARE (PRESSURE / AVERAGE DIAM): 1010 HPA / 600 KM
8.A VERTICAL EXTENSION OF CYCLONE CIRCULATION: SHALLOW
1.B FORECASTS:
12H: 2009/11/19 00 UTC: 26.9S/71.1E FILLING UP.
24H: 2009/11/19 12 UTC: 30.4S/76.1E DISSIPATING.
36H: 2009/11/20 00 UTC: 33.8S/82.0E DISSIPATED.
2.B OTHER INFORMATIONS:
T=1.5 AND CI=2.0
THE STILL FAIRLY WELL DEFINED LOW LEVEL VORTEX IS NOW SPEEDING UP
TOWARDS
 THE SOUTHSOUTHEAST WITHIN THE NORTHWESTERN FLOW AHEAD OF THE COLD
FRONT.
CONVECTION HAS NOT RESTARTED OVER THE CENTER SINCE MORE THAN 12
HOURS,
CONSEQUENTLY SYSTEM IS NOW DOWNGRADED TO THE TROPICAL DISTURBANCE
STATUS
WITH MAX WINDS OF 25 KT.
NO MAJOR CHANGE IN THE GENERAL PHILOSOPHY OF THE FORECAST: EX-ANJA
SHOULD
 MERGE WITHIN THE COLD FRONT LOCATED TO ITS SOUTHWEST OVER THE NEXT
END OF PART ONE
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