簽到天數: 868 天 [LV.10]以壇為家III
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jrchang5|2019-3-2 09:05
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本帖最後由 jrchang5 於 2019-3-2 09:57 編輯
MFR 01/18Z升格為熱帶低壓。02/00Z最新一報仍判定為熱帶低壓,但有機會在今日命名。
ZCZC 939
WTIO30 FMEE 011826 RRA
RSMC / TROPICAL CYCLONE CENTER / LA REUNION
TROPICAL CYCLONE FORECAST WARNING (SOUTH-WEST INDIAN OCEAN)
0.A WARNING NUMBER: 2/10/20182019
1.A TROPICAL DEPRESSION 10
2.A POSITION 2019/03/01 AT 1800 UTC:
WITHIN 20 NM RADIUS OF POINT 10.7 S / 75.6 E
(TEN DECIMAL SEVEN DEGREES SOUTH AND
SEVENTY FIVE DECIMAL SIX DEGREES EAST)
MOVEMENT: WEST-SOUTH-WEST 7 KT
3.A DVORAK ANALYSIS: 2.0/2.0/D 0.5/6 H
4.A CENTRAL PRESSURE: 999 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: 0 SE: 370 SW: 170 NW: 0
7.A FIRST CLOSED ISOBAR (PRESSURE / AVERAGE DIAM): 1006 HPA / 600 KM
8.A VERTICAL EXTENSION OF CYCLONE CIRCULATION: MEDIUM
1.B FORECASTS:
12H: 2019/03/02 06 UTC: 12.1 S / 74.5 E, VENT MAX= 045 KT, MODERATE
TROPICAL STORM
24H: 2019/03/02 18 UTC: 13.5 S / 73.6 E, VENT MAX= 050 KT, SEVERE
TROPICAL STORM
36H: 2019/03/03 06 UTC: 14.8 S / 73.2 E, VENT MAX= 055 KT, SEVERE
TROPICAL STORM
48H: 2019/03/03 18 UTC: 16.0 S / 73.0 E, VENT MAX= 065 KT, TROPICAL
CYCLONE
60H: 2019/03/04 06 UTC: 17.2 S / 72.9 E, VENT MAX= 070 KT, TROPICAL
CYCLONE
72H: 2019/03/04 18 UTC: 18.2 S / 72.6 E, VENT MAX= 065 KT, TROPICAL
CYCLONE
2.B LONGER-RANGE OUTLOOK:
96H: 2019/03/05 18 UTC: 20.1 S / 71.1 E, VENT MAX= 050 KT, SEVERE
TROPICAL STORM
120H: 2019/03/06 18 UTC: 22.2 S / 68.9 E, VENT MAX= 045 KT, MODERATE
TROPICAL STORM
2.C ADDITIONAL INFORMATION:
T=CI=2.0
NNNN ZCZC 999
WTIO30 FMEE 020029
RSMC / TROPICAL CYCLONE CENTER / LA REUNION
TROPICAL CYCLONE FORECAST WARNING (SOUTH-WEST INDIAN OCEAN)
0.A WARNING NUMBER: 3/10/20182019
1.A TROPICAL DEPRESSION 10
2.A POSITION 2019/03/02 AT 0000 UTC:
WITHIN 30 NM RADIUS OF POINT 11.4 S / 75.3 E
(ELEVEN DECIMAL FOUR DEGREES SOUTH AND
SEVENTY FIVE DECIMAL THREE DEGREES EAST)
MOVEMENT: SOUTH-SOUTH-WEST 7 KT
3.A DVORAK ANALYSIS: 2.5/2.5/D 1.5/24 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: 0 SE: 460 SW: 220 NW: 0
7.A FIRST CLOSED ISOBAR (PRESSURE / AVERAGE DIAM): 1006 HPA / 600 KM
8.A VERTICAL EXTENSION OF CYCLONE CIRCULATION: MEDIUM
1.B FORECASTS:
12H: 2019/03/02 12 UTC: 12.9 S / 74.1 E, VENT MAX= 040 KT, MODERATE
TROPICAL STORM
24H: 2019/03/03 00 UTC: 14.3 S / 73.4 E, VENT MAX= 045 KT, MODERATE
TROPICAL STORM
36H: 2019/03/03 12 UTC: 15.6 S / 73.0 E, VENT MAX= 050 KT, SEVERE
TROPICAL STORM
48H: 2019/03/04 00 UTC: 16.7 S / 72.7 E, VENT MAX= 055 KT, SEVERE
TROPICAL STORM
60H: 2019/03/04 12 UTC: 17.8 S / 72.4 E, VENT MAX= 065 KT, TROPICAL
CYCLONE
72H: 2019/03/05 00 UTC: 18.6 S / 72.0 E, VENT MAX= 070 KT, TROPICAL
CYCLONE
2.B LONGER-RANGE OUTLOOK:
96H: 2019/03/06 00 UTC: 20.6 S / 70.1 E, VENT MAX= 080 KT, TROPICAL
CYCLONE
120H: 2019/03/07 00 UTC: 23.0 S / 67.4 E, VENT MAX= 075 KT, TROPICAL
CYCLONE
2.C ADDITIONAL INFORMATION:
T=CI=2.5
THE VERY COLD CLOUD TOPS THAT WAS OVER THE CENTER BY THE TIME OF THE
PREVIOUS ADVISORY HAS COLLAPSED SOMEWHAT AROUND 21Z PROBABLY DUE TO
SOME NORTH-EASTERLY SHEAR. SINCE THAT TIME, SOME VERY COLD TOPS
BANDING FEATURES HAS REDEVELOPED OVER THE NORTH-WESTERN QUADRANT AND
THE SOUTH-EASTERN QUADRANT. SSMI PASS AT 2212Z REVEAL THAT THE LOW
LEVEL CIRCULATION HAS CONTINUED TO IMPROVE WITH A CLEAR CENTER NOW
DEPICTED ON 37 GHZ IMAGERY. DUE TO THE STILL FLUCTUATING NATURE OF
THE DEEP CONVECTION, THE FINAL INTENSITY IS HELD AT 30 KT IN
AGREEMENT WITH THE HIGHEST AVAILABLE SUBJECTIVE DVORAK ESTIMATES.
THE SYSTEM IS MOVING ON THE NORTH-WESTERN EDGE OF THE SUBTROPICAL
ANTICYCLONE. THE STEERING FLOW IS THEN EXPECTED TO BEND NORTHWARD AS
THE LOW DEEPEN AND A WEAKNESS DEVELOPS IN THE SUBTROPICAL RIDGE UNDER
THE INFLUENCE OF THE AFOREMENTIONED TROUGH. AT LONGER RANGE, THE
SYSTEM MAY MOVE SOUTH-WESTWARD AHEAD OF A NEW SUBTROPICAL RIDGE. THIS
SCENARIO REMAINS BASED ON THE CONSENSUS OF THE MAIN RELIABLE MODELS.
THERE IS SOME REASONABLE SPREAD AMONGST THE GUIDANCE WITH VERY GOOD
AGREEMENT BETWEEN LATEST OUTPUTS FROM GFS AND IFS AND UKMO AS AN
OUTLIER TO THE EAST.
REGARDS THE INTENSITY FORECAST, THE SYSTEM IS LIKELY TO BENEFIT FROM
IMPROVING ENVIRONMENTAL CONDITIONS TODAY. RI INDEX STILL SUGGEST THAT
A 25 KT INCREASE IS POSSIBLE UP TO 18Z TONIGHT. THE OFFICIAL FORECAST
REMAINS BELOW THAT RATE AT THIS TIME. AFTER THAT TIME, THE RATE OF
INTENSIFICATION IS SLOW DOWN MAINLY DUE TO MID LEVEL SUBTROPICAL DRY
AIR INGESTION WRAPPING FROM THE WESTERN AND NORTHERN CIRCULATION.
SOME SIGNIFICANT OCEANIC CONTAIN MAY OFFSET THIS NEGATIVE
THERMODYNAMICS EFFECTS.
FROM MONDAY AND BEYOND, THE EXPECTED ENVIRONMENTAL CONDITION HAS
CHANGED SOMEWHAT WITH THE 12Z AND EARLY MODELS FROM 18Z CYCLES. THERE
IS LESS NORTHERLY SHEAR EXPECTED INVOLVING LESS INFLUENCE FROM THE
DRY MID LEVEL AIR LOCATED JUST NORTH OF THE SYSTEM. THE OFFICIAL
FORECAST HAS BEEN UPGRADED BUT OVERALL THERE IS LOWER CONFIDENCE IN
THE FORECAST BY THAT TIME AS THE ENVIRONMENTAL CONDITIONS MAY CHANGE
AGAIN WITH THE NEXT CYCLE ...=
NNNN
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