Tropical Storm ROKE Advisory So, 02.10.

MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL STORM 20W (ROKE) WARNING NR 016//
RMKS/
1. TROPICAL STORM 20W (ROKE) WARNING NR 016
   01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   020000Z --- NEAR 36.3N 152.5E
     MOVEMENT PAST SIX HOURS - 065 DEGREES AT 21 KTS
     POSITION ACCURATE TO WITHIN 060 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   BECOMING SUBTROPICAL
   RADIUS OF 050 KT WINDS - 040 NM NORTHEAST QUADRANT
                            035 NM SOUTHEAST QUADRANT
                            035 NM SOUTHWEST QUADRANT
                            035 NM NORTHWEST QUADRANT
   RADIUS OF 034 KT WINDS - 120 NM NORTHEAST QUADRANT
                            070 NM SOUTHEAST QUADRANT
                            040 NM SOUTHWEST QUADRANT
                            105 NM NORTHWEST QUADRANT
   REPEAT POSIT: 36.3N 152.5E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   021200Z --- 37.1N 155.4E
   MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   SUBTROPICAL
   RADIUS OF 050 KT WINDS - 010 NM NORTHEAST QUADRANT
                            000 NM SOUTHEAST QUADRANT
                            020 NM SOUTHWEST QUADRANT
                            020 NM NORTHWEST QUADRANT
   RADIUS OF 034 KT WINDS - 250 NM NORTHEAST QUADRANT
                            080 NM SOUTHEAST QUADRANT
                            110 NM SOUTHWEST QUADRANT
                            130 NM NORTHWEST QUADRANT
   VECTOR TO 24 HR POSIT: 085 DEG/ 08 KTS
    ---
   24 HRS, VALID AT:
   030000Z --- 37.2N 157.4E
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   SUBTROPICAL
   RADIUS OF 034 KT WINDS - 250 NM NORTHEAST QUADRANT
                            040 NM SOUTHEAST QUADRANT
                            110 NM SOUTHWEST QUADRANT
                            140 NM NORTHWEST QUADRANT
    ---
REMARKS:
020300Z POSITION NEAR 36.5N 153.2E. 02OCT22.
TROPICAL STORM 20W (ROKE), LOCATED APPROXIMATELY 585 NM EAST-
SOUTHEAST OF MISAWA, JAPAN, HAS TRACKED EAST-NORTHEASTWARD AT 21
KNOTS OVER THE PAST SIX HOURS. ANIMATED MULTISPECTRAL SATELLITE
IMAGERY (MSI) DEPICTS A RAPIDLY DETERIORATING SYSTEM, WITH  A
PARTIALLY EXPOSED LOW LEVEL CIRCULATION CENTER (LLCC), RAPIDLY
TRANSITING EAST-NORTHEASTWARD ALONG THE NORTHWEST PERIPHERY OF A DEEP
SUBTROPICAL RIDGE (STR) TO THE SOUTHEAST. A 012308Z ASCAT  INDICATED
A HIGHLY ASYMMETRICAL WIND FIELD, WITH WINDS UP TO 55 KNOTS IN THE
SOUTHWESTERN QUADRANT OF THE CIRCULATION AND LESS THAN 35 KNOTS IN
THE EASTERN QUADRANT. THE INITIAL POSITION AND INTENSITY ARE ASSESSED
WITH HIGH CONFIDENCE BASED ON THE SCATTEROMETER DATA. THE JTWC MANUAL
AND AUTOMATED PHASE CLASSIFICATION INDICATE THE SYSTEM IS CURRENTLY
BECOMING A HYBRID TROPICAL-SUBTROPICAL CYCLONE, WITH CHARACTERISTICS
OF BOTH A TROPICAL CYCLONE, SUCH AS A WARM CORE, AND AN EXTRATROPICAL
CYCLONE, WITH  UPPER-LEVEL TROUGH SUPPORT AND COOL SSTS (24-26C). THE
SYSTEM IS RAPIDLY TRANSITIONING HOWEVER, 20W IS EXPECTED TO BECOME
FULLY SUBTROPICAL IN THE NEXT 12 HOURS. THIS IS THE FINAL WARNING ON
THIS SYSTEM BY THE JOINT TYPHOON WARCEN PEARL HARBOR HI. THE SYSTEM
WILL BE CLOSELY MONITORED FOR SIGNS OF REGENERATION.
MAXIMUM SIGNIFICANT WAVE HEIGHT AT 020000Z IS 25 FEET.
//
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