JTWC 熱帯低気圧TD17W（TROPICAL DEPRESSION 17W）を解析

JTWC（Joint Typhoon Warning Center：米軍合同台風警報センター）は9月21日21時00分（UTC）、日本時間9月22日06時00分（JST）時点で、日本の南（26.0N 137.7E）付近で「TROPICAL DEPRESSION（熱帯低気圧）17W」を解析・発表しています。

TC Warning Text

WTPN31 PGTW 220300
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL DEPRESSION 17W (SEVENTEEN) WARNING NR 002//
RMKS/
1. TROPICAL DEPRESSION 17W (SEVENTEEN) WARNING NR 002    
   02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   220000Z --- NEAR 26.0N 137.7E
     MOVEMENT PAST SIX HOURS - 300 DEGREES AT 12 KTS
     POSITION ACCURATE TO WITHIN 030 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   REPEAT POSIT: 26.0N 137.7E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   221200Z --- 28.1N 136.0E
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 034 KT WINDS - 070 NM NORTHEAST QUADRANT
                            040 NM SOUTHEAST QUADRANT
                            000 NM SOUTHWEST QUADRANT
                            030 NM NORTHWEST QUADRANT
   VECTOR TO 24 HR POSIT: 345 DEG/ 13 KTS
    ---
   24 HRS, VALID AT:
   230000Z --- 30.7N 135.3E
   MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 034 KT WINDS - 060 NM NORTHEAST QUADRANT
                            060 NM SOUTHEAST QUADRANT
                            020 NM SOUTHWEST QUADRANT
                            030 NM NORTHWEST QUADRANT
   VECTOR TO 36 HR POSIT: 015 DEG/ 12 KTS
    ---
   36 HRS, VALID AT:
   231200Z --- 33.1N 136.0E
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT
                            050 NM SOUTHEAST QUADRANT
                            010 NM SOUTHWEST QUADRANT
                            010 NM NORTHWEST QUADRANT
   VECTOR TO 48 HR POSIT: 040 DEG/ 11 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   240000Z --- 34.8N 137.8E
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
   RADIUS OF 034 KT WINDS - 010 NM NORTHEAST QUADRANT
                            050 NM SOUTHEAST QUADRANT
                            010 NM SOUTHWEST QUADRANT
                            000 NM NORTHWEST QUADRANT
   VECTOR TO 72 HR POSIT: 035 DEG/ 15 KTS
    ---
   72 HRS, VALID AT:
   250000Z --- 39.6N 142.0E
   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
    ---
REMARKS:
220300Z POSITION NEAR 26.5N 137.3E.
22SEP22. TROPICAL DEPRESSION 17W (SEVENTEEN), LOCATED
APPROXIMATELY 567 NM SOUTH OF YOKOSUKA, JAPAN, HAS TRACKED WEST-
NORTHWESTWARD AT 12 KNOTS OVER THE PAST SIX HOURS.
MAXIMUM SIGNIFICANT WAVE HEIGHT AT 220000Z IS 12 FEET. NEXT
WARNINGS AT 220900Z, 221500Z, 222100Z AND 230300Z.
REFER TO TROPICAL CYCLONE 18W (EIGHTEEN) WARNINGS (WTPN32 PGTW)
FOR SIX-HOURLY UPDATES.
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