簽到天數: 1650 天 [LV.Master]伴壇終老
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老農民版夜神月|2020-1-25 12:31
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JTWC升格10S,巔峰上看45KT
WTXS31 PGTW 242100
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE 10S (DIANE) WARNING NR 001//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/232051ZJAN2020//
AMPN/REF A IS A TROPICAL CYCLONE FORMATION ALERT.//
RMKS/
1. TROPICAL CYCLONE 10S (DIANE) WARNING NR 001
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:
241800Z --- NEAR 19.6S 56.9E
MOVEMENT PAST SIX HOURS - 110 DEGREES AT 15 KTS
POSITION ACCURATE TO WITHIN 030 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
050 NM SOUTHWEST QUADRANT
070 NM NORTHWEST QUADRANT
REPEAT POSIT: 19.6S 56.9E
---
FORECASTS:
12 HRS, VALID AT:
250600Z --- 20.9S 60.1E
MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 070 NM NORTHEAST QUADRANT
040 NM SOUTHEAST QUADRANT
020 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 110 DEG/ 15 KTS
---
24 HRS, VALID AT:
251800Z --- 22.0S 63.2E
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT
090 NM SOUTHEAST QUADRANT
090 NM SOUTHWEST QUADRANT
080 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 105 DEG/ 13 KTS
---
36 HRS, VALID AT:
260600Z --- 22.7S 66.0E
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 090 NM NORTHEAST QUADRANT
140 NM SOUTHEAST QUADRANT
140 NM SOUTHWEST QUADRANT
090 NM NORTHWEST QUADRANT
VECTOR TO 48 HR POSIT: 105 DEG/ 09 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
261800Z --- 23.1S 67.9E
MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 090 NM NORTHEAST QUADRANT
140 NM SOUTHEAST QUADRANT
150 NM SOUTHWEST QUADRANT
100 NM NORTHWEST QUADRANT
VECTOR TO 72 HR POSIT: 125 DEG/ 04 KTS
---
72 HRS, VALID AT:
271800Z --- 23.9S 69.2E
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
RADIUS OF 034 KT WINDS - 090 NM NORTHEAST QUADRANT
150 NM SOUTHEAST QUADRANT
150 NM SOUTHWEST QUADRANT
070 NM NORTHWEST QUADRANT
VECTOR TO 96 HR POSIT: 185 DEG/ 06 KTS
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LONG RANGE OUTLOOK:
---
96 HRS, VALID AT:
281800Z --- 26.4S 68.9E
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
---
REMARKS:
242100Z POSITION NEAR 19.9S 57.7E.
24JAN20. TROPICAL CYCLONE (TC) 10S (DIANE), LOCATED APPROXIMATELY 38
NM NORTHWEST OF PORT LOUIS, MAURITIUS, HAS TRACKED EAST-
SOUTHEASTWARD AT 15 KNOTS OVER THE PAST SIX HOURS. ANIMATED ENHANCED
INFRARED SATELLITE IMAGERY DEPICTS A CONSOLIDATING LOW-LEVEL
CIRCULATION WITH PERSISTENT DEEP CONVECTION. A 241805Z AMSU 89GHZ
MICROWAVE IMAGE INDICATES IMPROVED CURVED DEEP CONVECTIVE BANDING
OVER THE WESTERN SEMICIRCLE WRAPPING INTO THE NORTHERN QUADRANT OF A
DEFINED, EXPOSED LOW-LEVEL CIRCULATION CENTER. A 241652Z ASCAT
BULLSEYE DEPICTS A WELL-DEFINED CIRCULATION WITH 35-40 KNOT WINDS
OVER THE NORTHERN SEMICIRCLE. OVERALL CONFIDENCE IN THE INITIAL
POSITION AND INTENSITY IS GOOD BASED ON THE TIMELY ASCAT DATA.
ENVIRONMENTAL ANALYSIS INDICATES A MARGINALLY-FAVORABLE
ENVIRONMENT WITH STRONG (25-30 KNOTS) EASTERLY VERTICAL WIND SHEAR
(VWS) OFFSET BY GOOD EQUATORWARD AND POLEWARD OUTFLOW. SST VALUES OF
28-29C ARE CONDUCIVE FOR FURTHER DEVELOPMENT. TC 10S IS TRACKING
ALONG THE SOUTHERN PERIPHERY OF THE NEAR-EQUATORIAL RIDGE POSITIONED
TO THE NORTH AND IS FORECAST TO CONTINUE TRACKING EAST-SOUTHEASTWARD
THROUGH TAU 48. SLIGHT INTENSIFICATION IS EXPECTED AS VWS DECREASES
WITH A PEAK OF 45 KNOTS BY TAU 24. AFTER TAU 48, THE SYSTEM SHOULD
SLOW AND GRADUALLY TURN SOUTHEASTWARD AS THE STEERING ENVIRONMENT
WEAKENS DUE TO THE PRESENCE OF TC 11S. THE SYSTEM SHOULD WEAKEN DUE
TO INCREASING VWS ASSOCIATED WITH AN APPROACHING BROAD UPPER-LEVEL
SHORTWAVE TROUGH. AFTER TAU 72, TC 10S WILL TRACK SOUTHWARD AS THE
LOW-LEVEL SUBTROPICAL RIDGE BUILDS TO THE EAST AND SOUTH AND IS
FORECAST TO DISSIPATE UNDER COOLER SST AND STRONG VWS (30-40 KNOTS).
TC 10S IS FORECAST TO APPROACH WITHIN 320NM OF TC 11S AT TAU 96 AND
WILL LIKELY INFLUENCE ITS TRACK. OVERALL, CONFIDENCE IS LOW DUE TO
THE COMPLEX, EVOLVING STEERING ENVIRONMENT. MAXIMUM SIGNIFICANT WAVE
HEIGHT AT 241800Z IS 12 FEET. NEXT WARNINGS AT 250900Z AND 252100Z.
REFER TO TROPICAL CYCLONE 11S (ELEVEN) WARNINGS (WTXS32 PGTW) FOR
TWELVE-HOURLY UPDATES.
2. THIS CANCELS AND SUPERSEDES REF A (WTXS21 PGTW 232100).//
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