簽到天數: 3206 天 [LV.Master]伴壇終老
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king111807|2021-9-18 16:44
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JTWC發布Final Warning
WTPN32 PGTW 180300
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL DEPRESSION 19W (CHANTHU) WARNING NR 048//
RMKS/
1. TROPICAL DEPRESSION 19W (CHANTHU) WARNING NR 048
01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
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WARNING POSITION:
180000Z --- NEAR 34.1N 136.6E
MOVEMENT PAST SIX HOURS - 085 DEGREES AT 19 KTS
POSITION ACCURATE TO WITHIN 020 NM
POSITION BASED ON CENTER LOCATED BY A COMBINATION OF
SATELLITE, RADAR AND SYNOPTIC DATA
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
WIND RADII VALID OVER OPEN WATER ONLY
BECOMING EXTRATROPICAL
REPEAT POSIT: 34.1N 136.6E
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FORECASTS:
12 HRS, VALID AT:
181200Z --- 34.3N 139.9E
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
WIND RADII VALID OVER OPEN WATER ONLY
EXTRATROPICAL
VECTOR TO 24 HR POSIT: 085 DEG/ 10 KTS
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24 HRS, VALID AT:
190000Z --- 34.4N 142.4E
MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
WIND RADII VALID OVER OPEN WATER ONLY
EXTRATROPICAL
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REMARKS:
180300Z POSITION NEAR 34.2N 137.4E.
18SEP21. TROPICAL DEPRESSION 19W (CHANTHU), LOCATED APPROXIMATELY
169 NM WEST-SOUTHWEST OF YOKOSUKA, JAPAN, HAS TRACKED EASTWARD AT 19
KNOTS OVER THE PAST SIX HOURS. ANIMATED MULTISPECTRAL SATELLITE
IMAGERY SHOWS THE SYSTEM CONTINUED TO RAPIDLY WEAKEN AS THE
ASSOCIATED CONVECTION HAVE BEECOME SHEARED AND FRAGMENTED. THE LOW
LEVEL CIRCULATION HAS BEEN DIFFICULT TO LOCATE USING SATELLITE AND
COMPOSITE RADAR IMAGERY. THE INITIAL POSITION, JUST OFFSHORE FROM
SOUTHERN HONSHU, IS PLACED WITH MEDIUM CONFIDENCE BY EXTRAPOLATION
FROM NEARBY SURFACE OBSERVATIONS, INCLUDING OWASE AND SHIONOMISAKI.
THE INITIAL INTENSITY OF 25KTS IS ALSO EXTRAPOLATED FROM NEARBY WIND
AND SEA LEVEL PRESSURE OBSERVATIONS AND SUPPORTED BY THE DVORAK
ESTIMATE OF T1.5/25KTS FROM RJTD. TD 19W IS UNDERGOING EXTRA-
TROPICAL TRANSITION AND WILL BECOME A COLD CORE LOW BY TAU 12 AS IT
CONTINUES EASTWARD INTO THE PACIFIC OCEAN. 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 180000ZIS 10 FEET.//
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