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NATURE DU SYSTEME DEPRESSIONNAIRE TROPICAL
PRESENT SUR LE SUD-OUEST DE L'OCEAN INDIEN
FORTE TEMPETE TROPICALE GULAPRESSION ESTIMEE AU CENTRE : 978 HPA.POSITION LE 28 JANVIER A 22 HEURES LOCALES: 14.7 SUD / 62.0 EST
(QUATORZE DEGRES SEPT SUD ET SOIXANTE-DEUX DEGRES ZERO EST).
DISTANCE DES COTES REUNIONNAISES: 960 KM AU NORD-EST
DEPLACEMENT: NORD-OUEST A 5 KM/H.
RSMC / TROPICAL CYCLONE CENTRE / LA REUNION
TROPICAL CYCLONE FORECAST WARNING (SOUTH-WEST INDIAN OCEAN)0.A WARNING NUMBER : 10/9/20072008
1.A SEVERE TROPICAL STORM 9 (GULA)2.A POSITION 2008/01/28 AT 1800 UTC :
WITHIN 20 NM RADIUS OF POINT 14.7S / 62.0E
(FOURTEEN DECIMAL SEVEN DEGREES SOUTH AND SIXTY TWO DECIMAL ZERO DEGREES
EAST)
3.A DVORAK ANALYSIS : 4.0/4.0 /D 1.0/24 H4.A CENTRAL PRESSURE : 978 HPA5.A MAX AVERAGE WIND SPEED (10 MN) : 55 KT
6.A EXTENSION OF WINDS BY QUADRANTS (KM):
30 KT NE: 170 SE: 200 SO: 180 NO: 100
50 KT NE: 040 SE: 040 SO: 040 NO: 030
7.A FIRST CLOSED ISOBARE (PRESSURE / AVERAGE DIAM): 1004 HPA / 450 KM
8.A VERTICAL EXTENSION OF CYCLONE CIRCULATION: DEEP
1.B FORECASTS:
12H: 2008/01/29 06 UTC: 14.7S/61.1E, MAX WIND=060KT, SEVERE TROP. STORM.
24H: 2008/01/29 18 UTC: 15.2S/60.3E, MAX WIND=065KT, TROPICAL CYCLONE.
36H: 2008/01/30 06 UTC: 16.7S/59.2E, MAX WIND=070KT, TROPICAL CYCLONE.
48H: 2008/01/30 18 UTC: 18.6S/57.9E, MAX WIND=075KT, TROPICAL CYCLONE.
60H: 2008/01/31 06 UTC: 20.8S/56.7E, MAX WIND=080KT, TROPICAL CYCLONE.
72H: 2008/01/31 18 UTC: 23.4S/55.3E, MAX WIND=085KT, TROPICAL CYCLONE.2.B OTHER INFORMATIONS:
T=CI=4.0-
THE SYSTEM HAS ORGANIZED AS A REGULAR CDO PATTERN DURING THE LAST HOURS,
AND
AN EYE IS VISIBLE ON THE LAST MICRO-WAVES DATA.ENVIRONMENT IS FAVORABLE TO INTENSIFICATION AS THE SYSTEM IS LOCATED
UNDER THE UPPER LEVEL RIDGE.
THE SYSTEM SHOULD TRACK SOUTHWESTWARDS UNDER THE MAIN STEERING INFLUENCE
OF THE SUBTROPICALE RIDGE. BUT THIS SHOULD BE QUITE SLOWN DOWN FOR THE
NEXT 24 HOURS BY THE WEAKENING EFFECT OF AN UPPER LEVEL HIGH LOCATED IN
THE NORTHWEST OF THE SYSTEM.
BEYOND 48 HOURS, THE SUBTROPICAL RIDGE WEAKENS AND THE SYSTEM SHOULD
ACCELERATE SOUTHSOUTHWESTWARDS UNDER THE STEERING EFFECT OF A RIDGE ON
THE EAST OF THE SYSTEM.