Tropical Storm TWELVE Advisory Sat Sep 12

WARNING    ATCG MIL 12W NWP 200912014803
2020091200 12W TWELVE     002  01 015 06 SATL 030
T000 315N 1384E 025
T012 336N 1399E 025
T024 357N 1426E 025
AMP 000HR BECOMING EXTRATROPICAL
    012HR EXTRATROPICAL
    024HR EXTRATROPICAL
SUBJ:  TROPICAL DEPRESSION 12W (TWELVE) WARNING NR 002
1. TROPICAL DEPRESSION 12W (TWELVE) WARNING NR 002
   01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   120000Z --- NEAR 31.5N 138.4E
     MOVEMENT PAST SIX HOURS - 015 DEGREES AT 06 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
   BECOMING EXTRATROPICAL
   REPEAT POSIT: 31.5N 138.4E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   121200Z --- 33.6N 139.9E
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   EXTRATROPICAL
   VECTOR TO 24 HR POSIT: 045 DEG/ 15 KTS
    ---
   24 HRS, VALID AT:
   130000Z --- 35.7N 142.6E
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   EXTRATROPICAL
    ---
REMARKS:
120300Z POSITION NEAR 32.0N 138.8E.
12SEP20. TROPICAL DEPRESSION 12W (TWELVE), LOCATED APPROXIMATELY
237 NM SOUTH-SOUTHWEST OF YOKOSUKA, JAPAN, HAS TRACKED NORTH-
NORTHEASTWARD AT 06 KNOTS OVER THE PAST SIX HOURS. ANMIATED
MULTISPECTRAL SATELLITE IMAGERY (MSI) INDICATES THAT THE IMPROVING
CONVECTIVE ORGANIZATION OBSERVED SIX HOURS AGO HAS SUCCUMBED
TO THE HIGH (20 KNOT) VERTICAL WIND SHEAR (VWS), LEAVING BEHIND A
WEAK, EXPOSED LOW LEVEL CIRCULATION CENTER (LLCC).  THE INITIAL POSITION IS
BASED ON THE LLCC IN MSI WITH HIGH CONFIDENCE.  A 112304Z ASCAT-A
PASS RELEAVED ONLY A FEW ISOLATED 25 TO 30 KNOT WIND BARBS UNDER
DEEP CONVECTION, AND DISPLACED 75 NM FROM THE LLCC. THE INITIAL
INTENSITY IS ASSESSED AT 25 KNOTS BASED ON THESE ISOLATED ASCAT
WINDS AND AGENCY DVORAK ESTIMATES, HOWEVER, THE EXPOSED LLCC IS
GENERALLY CHARACTIZED BY ONLY 10-15 KNOT WINDS. 12W IS CLEARLY
INTERACTING WITH MID-LATITUDE WESTERLIES AND IS TAKING ON EXTRA-
TROPICAL CHARACTERISTICS. EXTRA-TROPICAL TRANSITION IS EXPECTED
TO BE COMPLETED WITHIN 12 HOURS, CONSISTENT WITH FSU PHASE SPACE
GUIDANCE. DYNAMIC GUIDANCE IS GOOD AGREEMENT FOR THIS SHORT
FORECAST. JTWC FORECAST CONFIDENCE IS ASSESSED AS HIGH.
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 120000Z
IS 9 FEET.
//
1220090912 238N1436E  15
1220090918 239N1433E  15
1220091000 242N1428E  15
1220091006 250N1422E  20
1220091012 255N1411E  20
1220091018 274N1403E  20
1220091100 279N1400E  20
1220091106 285N1396E  20
1220091112 296N1388E  20
1220091118 309N1382E  25
1220091200 315N1384E  25
NNNN
NNNN