簽到天數: 3291 天 [LV.Master]伴壇終老
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t02436|2015-2-6 17:28
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JTWC評級三級跳
05-18Z Low
06-01Z Medium
09Z發布TCFA
MFR升格熱帶低壓
一樣上望60KT
ZCZC 857
WTIO30 FMEE 060634
RSMC / TROPICAL CYCLONE CENTER / LA REUNION
TROPICAL CYCLONE FORECAST WARNING (SOUTH-WEST INDIAN OCEAN)
0.A WARNING NUMBER: 2/9/20142015
1.A TROPICAL DEPRESSION 9
2.A POSITION 2015/02/06 AT 0600 UTC:
WITHIN 30 NM RADIUS OF POINT 21.7 S / 41.5 E
(TWENTY ONE DECIMAL SEVEN DEGREES SOUTH AND FORTY ONE DECIMAL
FIVE DEGREES EAST)
MOVEMENT : SOUTH-EAST 12 KT
3.A DVORAK ANALYSIS: 2.5/2.5/D 1.5/18 H
4.A CENTRAL PRESSURE: 998 HPA
5.A MAX AVERAGE WIND SPEED (10 MN): 30 KT
RADIUS OF MAXIMUM WINDS (RMW) :NIL
6.A EXTENSION OF WIND BY QUADRANTS (KM):
28 KT NE: 330 SE: 190 SW: NW: 220
7.A FIRST CLOSED ISOBAR (PRESSURE / AVERAGE DIAM): 1004 HPA / 400 KM
8.A VERTICAL EXTENSION OF CYCLONE CIRCULATION : MEDIUM
1.B FORECASTS:
12H: 2015/02/06 18 UTC: 22.8 S / 42.3 E, MAX WIND=040 KT, MODERATE
TROPICAL STORM
24H: 2015/02/07 06 UTC: 23.8 S / 42.6 E, MAX WIND=050 KT, SEVERE
TROPICAL STORM
36H: 2015/02/07 18 UTC: 25.0 S / 42.6 E, MAX WIND=055 KT, SEVERE
TROPICAL STORM
48H: 2015/02/08 06 UTC: 26.2 S / 42.4 E, MAX WIND=060 KT, SEVERE
TROPICAL STORM
60H: 2015/02/08 18 UTC: 27.7 S / 41.4 E, MAX WIND=060 KT, SEVERE
TROPICAL STORM
72H: 2015/02/09 06 UTC: 29.2 S / 40.0 E, MAX WIND=050 KT, SEVERE
TROPICAL STORM
2.B LONGER-RANGE OUTLOOK :
96H: 2015/02/10 06 UTC: 32.4 S / 35.1 E, MAX WIND=040 KT,
POST-TROPICAL DEPRESSION
120H: 2015/02/11 06 UTC: 37.2 S / 37.1 E, MAX WIND=040 KT,
POST-TROPICAL DEPRESSION
2.C ADDITIONAL INFORMATIONS:
T=CI=2.5-
SINCE LAST NIGHT, THE DEEP CONVECTION HAS DEVELOPED IN THE NORTH-EAST
OF THE SYSTEM NR09, ALONG A CONVERGENCE AXIS THAT STRETCHES ALONG THE
WESTERN COAST OF MADAGASCAR. THE CONVECTION CLOSE TO THE CENTRE
REMAINS RATHER FLUCTUATING.
THE ASCAT DATA AT 05/1840Z SHOW A VERY DYSSIMETRIC LOW LEVEL WINDS
FIELD PATTERN, WITH NEAR GALE FORCE WINDS IN THE NORTHWESTERLY
MONSOON FLOW, AND MODERATE WINDS IN THE SOUTH-WESTERN SEMI-CIRCLE
(10/15 KT AT THE MET STATION OF EUROPA).
THE SYSTEM IS CURRENTLY MOVING OVER 30AOC SST. UP TO 25S, THE OCEAN
HEAT CONTENT IS HIGH, AND IT DROPS REGULARLY BETWEEN 25S AND 30S.
TODAY, UPPER LEVELS CONDITIONS ARE RATHER FAVOURABLE FOR
INTENSIFICATION (WEAK UPPER LEVELS WIND SHEAR, GOOD DIVERGENCE
EASTWARD). TOMORROW, A WESTERLY CONSTRAINT IS LIKELY TO SLOW THE
DEVELOPMENT OF THE SYSTEM. AND ON SUNDAY, THE NORTH-NORTH-WESTERLY
VERTICAL WIND SHEAR IS LIKELY TO BUILT AHEAD OF AN UPPER LEVEL
TROUGH.
AN IRREGULAR INTENSIFICATION IS ALSO FORECAST UP TO SUNDAY BEFORE THE
DETERIORATION OF THE ENVIRONMENTAL CONDITIONS.
THE SYSTEM IS EXPECTED SLOW DOWN TODAY AND TURN SOUTH-EASTWARD, AND
THEN POLEWARD SATURDAY ALONG THE WESTERN FLANK OF THE SUBTROPICAL
RIDGE. THE CURRENT FORECAST LIES NEAR THE MULTI-MODEL CONSENSUS. A
LANDFALL OVER THE SOUTH-WESTERN COASTS OF MADAGASCAR IS STILL A
POSSIBILITY, BUT IS LESS AND LESS FORECASTED.
ANOTHER SPELL OF HEAVY RAINS WILL ALSO HIT THE WESTERN COAST OF
MADAGASCAR AT THE END OF THIS WEEK, OVER WATER SATURATED SOILS.=
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