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本帖最后由 pocketbox 于 2026-1-21 11:11 编辑
WTIO30 FMEE 210239
RSMC / TROPICAL CYCLONE CENTER / LA REUNION
TROPICAL CYCLONE FORECAST WARNING (SOUTH-WEST INDIAN OCEAN)
0.A WARNING NUMBER: 44/6/20252026
1.A SEVERE TROPICAL STORM 6 (DUDZAI)
2.A POSITION 2026/01/21 AT 0000 UTC:
WITHIN 30 NM RADIUS OF POINT 27.8 S / 57.1 E
(TWENTY SEVEN DECIMAL EIGHT DEGREES SOUTH AND
FIFTY SEVEN DECIMAL ONE DEGREES EAST)
MOVEMENT: SOUTH 16 KT
3.A DVORAK ANALYSIS: 3.5/4.0/W 0.5/6 H
4.A CENTRAL PRESSURE: 984 HPA
5.A MAX AVERAGE WIND SPEED (10 MN): 55 KT
RADIUS OF MAXIMUM WINDS (RMW): NIL
6.A EXTENSION OF WIND BY QUADRANTS (KM):
28 KT NE: 195 SE: 220 SW: 150 NW: 150
34 KT NE: 140 SE: 150 SW: 65 NW: 55
48 KT NE: 55 SE: 65 SW: 0 NW: 0
7.A FIRST CLOSED ISOBAR (PRESSURE / AVERAGE DIAM): 1008 HPA / 500 KM
8.A VERTICAL EXTENSION OF CYCLONE CIRCULATION: DEEP
1.B FORECASTS (WINDS RADII IN KM):
12H: 2026/01/21 12 UTC: 32.2 S / 59.9 E, VENT MAX= 050 KT, POST-TROPICAL
DEPRESSION
28 KT NE: 285 SE: 285 SW: 155 NW: 240
34 KT NE: 165 SE: 175 SW: 75 NW: 120
48 KT NE: 65 SE: 55 SW: 35 NW: 55
24H: 2026/01/22 00 UTC: 39.4 S / 66.8 E, VENT MAX= 045 KT, POST-TROPICAL
DEPRESSION
28 KT NE: 500 SE: 345 SW: 140 NW: 435
34 KT NE: 305 SE: 220 SW: 110 NW: 230
36H: 2026/01/22 12 UTC: 46.1 S / 75.7 E, VENT MAX= 040 KT, EXTRATROPICAL
DEPRESSION
28 KT NE: 555 SE: 315 SW: 390 NW: 520
34 KT NE: 335 SE: 130 SW: 185 NW: 250
2.B LONGER-RANGE OUTLOOK:
NIL
2.C ADDITIONAL INFORMATION:
T=3.5+ CI=4.0
OVER THE LAST 6 HOURS, CONVECTIVE ACTIVITY HAS INCREASED, BUT THE
CLOUD STRUCTURE HAS BECOME SIGNIFICANTLY LESS ORGANISED. CONVECTIVE
BURSTS HAVE OCCURRED NEAR THE LOW-LEVEL VORTEX, BUT HAVE NOT
PERSISTED. THE IMAGE FROM THE 2137TU GCOM SWATH STILL SHOWS A
LOW-LEVEL RING, ALTHOUGH ASYMMETRICAL, WHICH JUSTIFIES MAINTAINING
THE STAGE OF SEVERE TROPICAL STORM WITH MAXIMUM WIND SPEEDS OF 55KT. A
SUBJECTIVE DVORAK ANALYSIS BASED ON THE MET AND THE SLIGHT DECREASE
IN OBJECTIVE ANALYSES (DMINT AND DPRINT) COMPARED TO THE PREVIOUS
ANALYSIS TIME ALLOWED US TO DECIDE ON THIS SLIGHT WEAKENING IN
INTENSITY.
NO CHANGE IN FORECAST TRACK : DUDZAI CONTINUES ITS SOUTH-SOUTHEAST
TRACK ON THE WEST SIDE OF THE SUBTROPICAL MID-TROPOSPHERE RIDGE. THIS
MORNING, IT SHOULD BEGIN TO CURVE SOUTH-EAST UNDER THE INFLUENCE OF A
MID-LATITUDE TROUGH APPROACHING FROM THE WEST AND THE PULL BACK OF
THE RIDGE TOWARDS THE EAST. ALL MODELS CONFIRM THIS RSMC FORECAST
WITH VERY LITTLE DISPERSION.
REGARDING INTENSITY, IN THE NEXT 12 HOURS AS IT PASSES SOUTH OF 30S, OVER
COOLER WATERS, THE SYSTEM SHOULD GRADUALLY LOSE ITS TROPICAL
FEATURES. IT MAY BE CLASSIFIED AS POST-TROPICAL IN THE AFTERNOON AND
THEN EXTRA-TROPICAL AS IT IS EXPECTED TO MERGING WITH A COLD FRONT AND
A MID-LATITUDE LOW.
NO SIGNIFICANT IMPACT IS EXPECTED ON INHABITED LAND OVER THE NEXT 72
HOURS. |
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