Direction Interrégionale de LA REUNION
B.P.4    97491 Ste Clotilde Cedex
Téléphone                02.62.92.11.00
Fax exploitation      02.62.92.11.48
Fax direction           02.62.92.11.47

RSMC / TROPICAL CYCLONE CENTRE / LA REUNION TROPICAL CYCLONE FORECAST WARNING (SOUTH-WEST INDIAN OCEAN) 0.A WARNING NUMBER : 30/12/20082009 1.A EXTRATROPICAL DEPRESSION 12 (EX-JADE) 2.A POSITION 2009/04/11 AT 1200 UTC : 32.8S / 58.6E (THIRTY TWO DECIMAL EIGHT DEGREES SOUTH AND FIFTY EIGHT DECIMAL SIX DEGREES EAST) MOVEMENT : SOUTH-EAST 23 KT 3.A DVORAK ANALYSIS : / 4.A CENTRAL PRESSURE : 983 HPA 5.A MAX AVERAGE WIND SPEED (10 MN) : 50 KT RADIUS OF MAXIMUM WINDS (RMW) : 40 KM 6.A EXTENSION OF WINDS BY QUADRANTS (KM): 30 KT NE: 300 SE: 350 SO: 180 NO: 150 50 KT NE: 030 SE: 030 SO: 020 NO: 010 7.A FIRST CLOSED ISOBARE (PRESSURE / AVERAGE DIAM): 1004 HPA / 800 KM 8.A VERTICAL EXTENSION OF CYCLONE CIRCULATION: MEDIUM 1.B FORECASTS: 12H: 2009/04/12 00 UTC: 34.9S/58.6E, MAX WIND=050KT, EXTRATROPICAL. 24H: 2009/04/12 12 UTC: 39.1S/62.3E, MAX WIND=050KT, EXTRATROPICAL. 36H: 2009/04/13 00 UTC: 46.3S/66.3E, MAX WIND=060KT, EXTRATROPICAL. 48H: 2009/04/13 12 UTC: 53.2S/70.7E, MAX WIND=060KT, EXTRATROPICAL. 60H: 2009/04/14 00 UTC: TROP. DISTURBANCE. 2.B OTHER INFORMATIONS: THE EXTRATOPICAL TRANSITION IS VISIBLE ON THE LAST ASCAT DATA 05Z AND PRESSION DATA OF THE BUOY NR 16583 AS THE CENTER PASS NEARBY BETWEEN 08Z AN 09Z. THE SYSTEM IS EXPECTED TO TEMPORALY SLOW DOWN DURING THE NEXT 12 TO 24 HOURS, AS THE RIDGE REBUILT TEMPORALY IN THE SOUTH, THEN ACCELERATE AGAIN TOWARDS THE EXTRATROPICAL LATITUDES. STRONGEST WINDS EXTEND IN THE EASTERN SECTOR DUE TO THE SYSTEM OWN MOTION AND THE GRADIENT EFFECT WIT THE SUBTROPICAL HIGH PRESSURES. THE LOW IS EXPECTED TO DISSIPATE BEYOND TAU 60 MERGING IN A POLAR TROUGH. LAST WARNING ABOUT THIS SYSTEM. PLEASE REFER TO THE GMDSS BULLETINS FQIO20 FOR FURTHER DETAILS.