WTPN31 PGTW 270900
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE WARNING//
RMKS/
1. TROPICAL STORM 06W (CHAMPI) WARNING NR 026
01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
270600Z --- NEAR 31.9N 142.5E
MOVEMENT PAST SIX HOURS - 025 DEGREES AT 22 KTS
POSITION ACCURATE TO WITHIN 015 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
BECOMING EXTRATROPICAL
RADIUS OF 034 KT WINDS - 060 NM NORTHEAST QUADRANT
055 NM SOUTHEAST QUADRANT
030 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
REPEAT POSIT: 31.9N 142.5E
---
FORECASTS:
12 HRS, VALID AT:
271800Z --- 36.2N 146.3E
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
EXTRATROPICAL
RADIUS OF 034 KT WINDS - 060 NM NORTHEAST QUADRANT
110 NM SOUTHEAST QUADRANT
060 NM SOUTHWEST QUADRANT
010 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 050 DEG/ 30 KTS
---
24 HRS, VALID AT:
280600Z --- 39.8N 152.3E
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
EXTRATROPICAL
RADIUS OF 034 KT WINDS - 090 NM NORTHEAST QUADRANT
150 NM SOUTHEAST QUADRANT
120 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
---
REMARKS:
270900Z POSITION NEAR 33.0N 143.5E.
27JUN21. TROPICAL STORM 06W (CHAMPI), LOCATED APPROXIMATELY 247 NM
SOUTHEAST OF YOKOSUKA, JAPAN, HAS TRACKED NORTH-NORTHEASTWARD AT 22
KNOTS OVER THE PAST SIX HOURS. ANIMATED MULTISPECTRAL SATELLITE
IMAGERY (MSI) SHOWS THE SYSTEM HAS ELONGATED WITH THE MAIN
CONVECTION COLLAPSED AND SHEARED NORTHEASTWARD, PARTLY EXPOSING THE
LOW LEVEL CIRCULATION (LLC). THE INITIAL POSITION IS PLACED WITH
HIGH CONFIDENCE BASED ON MSI LOW CLOUD TRACING INTO THE LLC. THE
INITIAL INTENSITY OF 35 KTS IS ASSESSED WITH HIGH CONFIDENCE BASED
ON OVERALL ASSESSMENT OF AGENCY AND AUTOMATED DVORAK FIXES RANGING
FROM 30KTS TO 45KTS. ENVIRONMENTAL ANALYSIS INDICATES TS CHAMPI HAS
ENTERED THE BAROCLINIC ZONE WHERE SSTS HAVE DROPPED TO 23-24C AND
VWS ARE >30KTS. TS 06W WILL CONTINUE TO ACCELERATE NORTHEASTWARD ON
THE POLEWARD SIDE OF THE STEERING STR TO THE SOUTHEAST. THE SYSTEM
HAS BEGUN EXTRA-TROPICAL TRANSITION AND BY TAU 12 WILL TRANSFORM
INTO A GALE-FORCE COLD CORE LOW WITH AN EXPANSIVE WIND FIELD. 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 270600Z IS 14
FEET.//
NNNN
JMA12Z判定轉化為溫帶氣旋
WTPQ50 RJTD 271200
RSMC TROPICAL CYCLONE ADVISORY
NAME DEVELOPING LOW FORMER TS 2105 CHAMPI (2105)
ANALYSIS
PSTN 271200UTC 34N 144E
MOVE NNE 25KT
PRES 998HPA
MXWD 040KT
30KT 300NM =
