Direction Interrégionale de LA REUNION
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WTIO22 FMEE 111200 SECURITE STORM WARNING FOR METAREA VII AND METAREA VIII (S) ISSUED BY METEO-FRANCE/TROPICAL CYCLONE CENTRE/LA REUNION 11/04/2009 AT 1200 UTC. WARNING NUMBER: 030/12 (SOUTH-WEST INDIAN OCEAN) 10 MINUTES AVERAGE WIND SPEED IN KNOTS (KT) (WIND GUSTS AT SEA MAY BE ABOUT 40% STRONGER THAN THE AVERAGED WIND). MINIMUM SEA LEVEL PRESSURE IN HECTOPASCALS (HPA) (INDICATIVE FIGURE). STORM WARNING BEGINNING OF VALIDITY: SATURDAY 11/04/2009 AT 1200 UTC. PHENOMENON: EXTRATROPICAL DEPRESSION 12 (EX-JADE) 983 HPA POSITION: 32.8S / 58.6E (THIRTY TWO DECIMAL EIGHT DEGREES SOUTH AND FIFTY EIGHT DECIMAL SIX DEGREES EAST) AT 1200 UTC MOVEMENT: SOUTH-EAST 23 KT THREAT AREAS: SQUALLY WEATHER EXISTS WITHIN 60 NM RADIUS OF THE CENTER EXTENDING UP TO 400 NM IN THE SOUTHEASTERN SEMI-CIRCLE . STORM FORCE WINDS 50 KT AND HIGH SEAS NEAR THE CENTER, MAINLY IN THE EASTERN SEMI-CIRCLE. GALE FORCE WINDS 35/45 KT AND VERY ROUGH SEAS TO HIGH SEAS WITHIN 20 NM FROM THE CENTER EXTENDING UP TO 100 NM IN THE EASTERN SEMI-CIRCLE. NEAR GALE FORCE WINDS 30 KT AND ROUGH TO VERY ROUGH SEAS WITHIN 60 NM RADIUS OF THE CENTER EXTENDING UP TO 180 NM FROM THE CENTER IN THE NORTHEASTERN QUADRANT AND UP TO 210 NM IN THE SOUTHEASTERN QUADRANT. STRONG GUSTS UNDER SQUALLS. FORECAST POSITION AND INTENSITY: 12H, VALID 2009/04/12 AT 00 UTC: 34.9S / 58.6E, MAX WIND = 50 KT, EXTRATROPICAL. 24H, VALID 2009/04/12 AT 12 UTC: 39.1S / 62.3E, MAX WIND = 50 KT, EXTRATROPICAL. 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 AND 09Z. THE SYSTEM IS EXPECTED TO TEMPORALY SLOW DOWN DURING THE NEXT 12 TO 24 HOURS, 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. LAST WARNING ABOUT THIS SYSTEM. PLEASE REFER TO THE GMDSS BULLETINS FQIO20 FOR FURTHER DETAILS.