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老農民版夜神月|2019-3-15 12:54
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本帖最後由 老農民版夜神月 於 2019-3-15 13:09 編輯
JTWC在18S(Idai)中心登陸莫三比克後發出FW
Tropical Cyclone 18S (Idai) Warning #24 Final Warning lssued at 15/0300Z
WTXS32 PGTW 150300
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE 18S (IDAI) WARNING NR 024//
RMKS/
1. TROPICAL CYCLONE 18S (IDAI) WARNING NR 024
02 ACTIVE TROPICAL CYCLONES IN SOUTHIO
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
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WARNING POSITION:
150000Z --- NEAR 19.6S 34.8E
MOVEMENT PAST SIX HOURS - 280 DEGREES AT 07 KTS
POSITION ACCURATE TO WITHIN 030 NM
POSITION BASED ON EYE FIXED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 090 KT, GUSTS 110 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
RADIUS OF 064 KT WINDS - 015 NM NORTHEAST QUADRANT
020 NM SOUTHEAST QUADRANT
020 NM SOUTHWEST QUADRANT
015 NM NORTHWEST QUADRANT
RADIUS OF 050 KT WINDS - 040 NM NORTHEAST QUADRANT
055 NM SOUTHEAST QUADRANT
060 NM SOUTHWEST QUADRANT
045 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 100 NM NORTHEAST QUADRANT
125 NM SOUTHEAST QUADRANT
125 NM SOUTHWEST QUADRANT
090 NM NORTHWEST QUADRANT
REPEAT POSIT: 19.6S 34.8E
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FORECASTS:
12 HRS, VALID AT:
151200Z --- 19.0S 33.5E
MAX SUSTAINED WINDS - 075 KT, GUSTS 090 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
VECTOR TO 24 HR POSIT: 295 DEG/ 05 KTS
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24 HRS, VALID AT:
160000Z --- 18.6S 32.5E
MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
VECTOR TO 36 HR POSIT: 290 DEG/ 06 KTS
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36 HRS, VALID AT:
161200Z --- 18.2S 31.4E
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
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REMARKS:
150300Z POSITION NEAR 19.4S 34.5E.
TROPICAL CYCLONE 18S (IDAI), LOCATED APPROXIMATELY 340 NM WEST-
NORTHWEST OF EUROPA ISLAND, HAS TRACKED WESTWARD AT 07 KNOTS OVER
THE PAST SIX HOURS. ANIMATED ENHANCED INFRARED (EIR) SATELLITE
IMAGERY AND A 142252Z SSMIS GHZ MICROWAVE IMAGE SHOWS A WEAKENING
SYSTEM WITH A SMALL, RAGGED EYE. THE INITIAL POSITION IS PLACED ON
THE SMALL EYE IN EIR IMAGERY WITH HIGH CONFIDENCE. THE INITIAL
INTENSITY IS SET AT 90 KNOTS DUE TO THE DIMINISHING EYEWALL
CONVECTION AND WARMING CLOUD TOPS. THE UPPER LEVEL ENVIRONMENT
INDICATES MODERATELY FAVORABLE ENVIRONMENTAL CONDITIONS WITH LOW (10-
15 KNOTS) VERTICAL WIND SHEAR AND WEAKENING POLEWARD OUTFLOW TO THE
SOUTHEAST. HOWEVER, TC 18S HAS MADE LANDFALL AND WILL CONTINUE TO
WEAKEN. TC 18S HAS CONTINUED TO TRACK WEST-NORTHWESTWARD ALONG THE
NORTHEAST PERIPHERY OF THE SUBTROPICAL RIDGE (STR). NUMERICAL MODEL
GUIDANCE REMAINS IN TIGHT AGREEMENT THROUGH TAU 12 BUT DIVERGES
SLIGHTLY AS THE SYSTEM RAPIDLY WEAKENS OVER LAND. OVERALL, THERE IS
HIGH CONFIDENCE IN THE JTWC FORECAST TRACK. TC 18S IS EXPECTED TO
WEAKEN RAPIDLY DUE TO INCREASING FRICTIONAL EFFECTS AND DRY AIR
ENTRAINMENT, WITH DISSIPATION EXPECTED BY TAU 36. THIS IS THE FINAL
WARNING ON THIS SYSTEM BY THE JOINT TYPHOON WRNCEN PEARL HARBOR HI.
THE SYSTEM WILL BE CLOSELY MONITORED FOR SIGNS OF REGENERATION.
MAXIMUM SIGNIFICANT WAVE HEIGHT AT 150000Z IS 22 FEET. REFER TO
TROPICAL CYCLONE 19S (SAVANNAH) WARNINGS (WTXS31 PGTW) FOR SIX-
HOURLY UPDATES.
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