#35 Postby HURAKAN » Wed Feb 09, 2011 10:44 pm
ZCZC 038
WTIO30 FMEE 100133
RSMC / TROPICAL CYCLONE CENTRE / LA REUNION
TROPICAL CYCLONE TECHNICAL BULLETIN (SOUTH-WEST INDIAN OCEAN)
0.A WARNING NUMBER : 4/5/20102011
1.A MODERATE TROPICAL STORM 5 (BINGIZA)
2.A POSITION 2011/02/10 AT 0000 UTC :
WITHIN 40 NM RADIUS OF POINT 13.5S / 54.2E
(THIRTEEN DECIMAL FIVE DEGREES SOUTH AND FIFTY FOUR DECIMAL TWO DEGREES
EAST)
MOVEMENT : WEST-NORTH-WEST 5 KT
3.A DVORAK ANALYSIS : 3.0/3.0 /D 0.5/12 H
4.A CENTRAL PRESSURE : 991 HPA
5.A MAX AVERAGE WIND SPEED (10 MN) : 40 KT
RADIUS OF MAXIMUM WINDS (RMW) : 40 KM
6.A EXTENSION OF WINDS BY QUADRANTS (KM):
28 KT NE: 180 SE: 150 SO: 220 NO: 220
34 KT NE: 070 SE: 070 SO: 070 NO: 070
7.A FIRST CLOSED ISOBARE (PRESSURE / AVERAGE DIAM): 1003 HPA / 650 KM
8.A VERTICAL EXTENSION OF CYCLONE CIRCULATION: MEDIUM
1.B FORECASTS:
12H: 2011/02/10 12 UTC: 13.2S/54.0E, MAX WIND=040KT , MODERATE TROP.
STORM.
24H: 2011/02/11 00 UTC: 12.9S/54.3E, MAX WIND=045KT , MODERATE TROP.
STORM.
36H: 2011/02/11 12 UTC: 13.2S/54.7E, MAX WIND=050KT , SEVERE TROP. STORM.
48H: 2011/02/12 00 UTC: 13.7S/54.8E, MAX WIND=060KT , SEVERE TROP. STORM.
60H: 2011/02/12 12 UTC: 14.1S/54.8E, MAX WIND=065KT , TROPICAL CYCLONE.
72H: 2011/02/13 00 UTC: 14.9S/54.7E, MAX WIND=075KT , TROPICAL CYCLONE.
2.B LONGER-RANGE OUTLOOK:
96H: 14/02/2011 00 UTC: 16.8S/54.4E, MAX WIND=085KT , TROPICAL CYCLONE.
120H: 15/02/2011 00 UTC: 20.1S/52.6E, MAX WIND=085KT , TROPICAL CYCLONE.
2.C ADDITIONAL INFORMATIONS:
T=CI=3.0
AFTER A RAPID INTENSIFICATION DURING THE END OF THE DAY, BINGIZA SEEMS TO
UNDERGO THE EASTERLY WINDSHEAR VISIBLE ON INFRARED SATELLITE IMAGERY
(ARC OF CIRRUS ON THE EASTERN PART OF THE SYSTEM). FROM THE LATEST HOURS,
CONVECTION HAS SLIGHTY DECREASED NEAR THE CENTRE (SUMMITS LESS COLD).
AVAILABLE NWP MODELS ARE NOT IN AGREEMENT FOR THE EXPECTED TRACKS.
HOWEVER, THEY AGREE FOR AN ERRATIC TRACK WITHIN THE NEXT 48 HOURS INDUCED
BY CONTRADICTORY MID-LEVEL STEERING FLOWS. BEYOND, AMERICAN AND UKMO NWP
MODELS FORECAST A SOUTHWARD TRACK TOWARDS MADAGASCAR WHILE CEP AND
ARPEGE MODELS FOREC
AST A SOUTHWARD TRACK AND THEN SOUTH-SOUTHWARD TRACK BY CEP.
CONSEQUENTLY CMRS FINAL FORECAST HAS BEEN MODIFIED IN REGARD WITH THE
PREVIOUS. THE SYSTEM SHOULD BEGIN LATER ITS SOUTHWARD TRACK TOWARDS A MID
-LATITUDE DEEP TROUGH PRESENT IN THE SOUTH OF THE SYSTEM NEAR 50E. BEFORE
, EASTERLY WINDSHEAR SHOULD RESTRICT ITS INTENSIFICATION. AFTER THAT,
UPPER LEVEL CO
NDITIONS IS EXPECTED TO IMPROVE SIGNIFICANTLY WITH LOWER SHEAR AND GOOD
OUTFLOW SPECIALLY POLEWARDS. THEREFORE, A STRONGER INTENSIFICATION RATE
IS EXPECTED BY THAT TIME.
INHABITANTS OF MASCARENES ISLANDS AND THE EASTERN COAST OF MADAGASCAR
SHOULD CLOSELY FOLLOW THE EVOLUTION OF THIS SYSTEM.
NNNN
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