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

WTIO22 FMEE 270000 SECURITE STORM WARNING FOR METAREA VII AND METAREA VIII (S) ISSUED BY METEO-FRANCE/TROPICAL CYCLONE CENTRE/LA REUNION 27/02/2007 AT 0000 UTC. WARNING NUMBER: 024/11 (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: TUESDAY 27/02/2007 AT 0000 UTC. PHENOMENON: SEVERE TROPICAL STORM 11 (HUMBA) 985 HPA POSITION: WITHIN 30 NM RADIUS OF POINT 25.2S / 78.7E (TWENTY FIVE DECIMAL TWO DEGREES SOUTH AND SEVENTY EIGHT DECIMAL SEVEN DEGREES EAST) AT 0000 UTC MOVEMENT: SOUTH-SOUTH-EAST 7 KT THREAT AREAS: SQUALLY WEATHER EXISTS WITHIN 100 NM RADIUS FROM THE CENTER, EXTENDING UP TO MORE THAN 500 NM IN THE SOUTHEASTERN QUADRANT. STORM FORCE WINDS 50 KT AND HIGH TO VERY HIGH SEAS WITHIN 30 NM RADIUS FROM THE CENTER, EXTENDING UP TO 50 NM AND REACHING LOCALLY 55/60KT IN THE SOUTHERN SECTOR. GALE FORCE WINDS 35/45KT AND VERY ROUGH SEAS TO HIGH SEAS WITHIN 90 NM RADIUS FROM THE CENTER. NEAR GALE FORCE WINDS 30KT AND ROUGH TO VERY ROUGH SEAS WITHIN 120 NM RADIUS OF THE CENTER, EXTENDING UP TO 350 NM IN THE SOUTERN SEMI-CIRCLE STRONG GUSTS UNDER SQUALLS. FORECAST POSITION AND INTENSITY: 12H, VALID 2007/02/27 AT 12 UTC: 27.3S / 79.0E, MAX WIND = 50 KT, BECOMING EXTRATROPICAL. 24H, VALID 2007/02/28 AT 00 UTC: 29.3S / 78.8E, MAX WIND = 50 KT, EXTRATROPICAL. OTHER INFORMATIONS: HUMBA STARTS A CHANGEMENT IN ITS STRUCTURE, BECOMING EXTRATROPICAL, OVER WATER WHERE SST ARE UNDER 26 DEGRES CELSIUS AND WITHIN A STRONGLY NORTHWESTERLY SHEARED ENVIRONMENT. RESIDUAL ASSOCIATED THUNDERY ACTIVITY IS SOUTHEASTWARDS AWAY FROM THE CENTRE. HOWEVER, THE LOW LEVEL CLOCKWISE CIRCULATION REMAINS RATHER BROAD, AND STRONG WINDS EXTEND FAR IN THE SOUTH DUE TO THE GRADIENT EFFECT WITH THE SUBTROPICAL HIGH PRESSURES, CENTRED RIGHT INTO THE SOUTH OF THE SYSTEM. HUMBA IS EXPECTED TO KEEP ON TRACKING MAINLY SOUTHWARDS THEN QUICKLY SOUTHWESTWARDS TOWARDS THE MID-LATITUDES BEYOND THE NEXT 36 HOURS.