WTPN31 PGTW 202100
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL DEPRESSION 01W (NOKAEN) WARNING NR 025//
RMKS/
1. TROPICAL DEPRESSION 01W (NOKAEN) WARNING NR 025
   DOWNGRADED FROM TROPICAL STORM 01W
   01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   201800Z --- NEAR 17.1N 133.0E
     MOVEMENT PAST SIX HOURS - 120 DEGREES AT 11 KTS
     POSITION ACCURATE TO WITHIN 050 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   REPEAT POSIT: 17.1N 133.0E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   210600Z --- 15.5N 134.0E
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   VECTOR TO 24 HR POSIT: 170 DEG/ 09 KTS
    ---
   24 HRS, VALID AT:
   211800Z --- 13.7N 134.3E
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
    ---
REMARKS:
202100Z POSITION NEAR 16.7N 133.3E.
20JAN26. TROPICAL DEPRESSION 01W (NOKAEN), LOCATED APPROXIMATELY
544 NM NORTH-NORTHWEST OF YAP, HAS TRACKED EAST-SOUTHEASTWARD AT
11 KNOTS OVER THE PAST SIX HOURS. ANIMATED ENHANCED INFRARED SATELLITE 
IMAGERY (EIR) DEPICTS A RAPIDLY UNRAVELING LOW LEVEL CIRCULATION 
CENTER, WITH MULTIPLE SMALL VORTICES DEVELOPING AROUND THE PERIPHERY 
OF THE HIGHLY ELONGATED LLCC. THE PRIMARY VORTEX CURRENTLY BEING 
TRACKED AS THE CENTER OF TD 01W IS LOCATED ON THE SOUTHEASTERN 
PERIPHERY OF THE BROADER ROTATION, BEING FIXED ON BY BOTH PGTW AND 
RJTD. A 201627Z AMSR2 36GHZ MICROWAVE IMAGE REVEALED AN ELONGATED LOW 
EMISSIVITY REGION (LER) WITH A LINEAR BAND OF CONVECTION TO THE 
NORTHEAST WHERE THE TAIL END OF A SHEAR LINE MERGES WITH THE BROADER 
CIRCULATION. THE REMAINDER OF THE LLCC IS DEVOID OF CONVECTIVE 
ACTIVITY. OVERNIGHT SCATTEROMETER DATA INDICATED WINDS OF 30-35 KNOTS 
EMBEDDED WITHIN THE STRONG NORTHEASTERLY FLOW ALONG THE NORTHWESTERN 
FLANK OF THE SYSTEM, AND LIGHT WINDS ACROSS THE REMAINDER OF THE 
CIRCULATION. THE INITIAL POSITION AND INTENSITY ARE ASSESSED WITH HIGH 
CONFIDENCE. THE SYSTEM WILL CONTINUE TO TRACK SOUTHEASTWARD ALONG THE 
LEADING EDGE OF THE SHEAR LINE OR FRONTAL SYSTEM, AHEAD OF A 
REINVIGORATED COLD SURGE EVENT, OVER THE NEXT 24 HOURS. DURING THIS 
TIME, THE LLCC WILL CONTINUE TO UNRAVEL AND BECOME INCREASINGLY LINEAR 
IN NATURE. WHILE WINDS OF 25-30 KNOTS WILL PERSIST WITHIN THE 
NORTHEASTERLY SURGE FLOW, THEY WILL BE LINEAR IN NATURE AND NOT 
DIRECTLY ASSOCIATED WITH THE REMAINS OF TD 01W.
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. MINIMUM CENTRAL PRESSURE AT 201800Z IS
1001 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 201800Z IS 14 FEET.//
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