WTPN33 PGTW 202100
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE WARNING//
RMKS/
1. TROPICAL DEPRESSION 18W (MALAKAS) WARNING NR 037
   DOWNGRADED FROM TROPICAL STORM 18W
   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 36.8N 142.4E
     MOVEMENT PAST SIX HOURS - 065 DEGREES AT 33 KTS
     POSITION ACCURATE TO WITHIN 060 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
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   REPEAT POSIT: 36.8N 142.4E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   210600Z --- 37.9N 147.7E
   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   VECTOR TO 24 HR POSIT: 080 DEG/ 12 KTS
    ---
   24 HRS, VALID AT:
   211800Z --- 38.2N 150.8E
   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
    ---
REMARKS:
202100Z POSITION NEAR 37.1N 143.7E.
TROPICAL DEPRESSION 18W (MALAKAS), LOCATED APPROXIMATELY 159 NM
NORTHEAST OF YOKOSUKA, JAPAN, HAS TRACKED EAST-NORTHEASTWARD AT
33 KNOTS OVER THE PAST SIX HOURS. ANIMATED ENHANCED INFRARED
SATELLITE IMAGERY AND LOCAL RADAR PRODUCTS DEPICT A SYSTEM THAT HAS
BEEN SHEARED APART WITH VIRTUALLY NO CONVECTIVE STRUCTURE REMAINING.
INTERACTION WITH LANDMASS HAS SIGNIFICANTLY DISRUPTED THE LOW LEVEL
FLOW, LEADING TO POOR IDENTIFICATION OF THE INITIAL POSITION AND
WEAKENING TO A TROPICAL DEPRESSION. THE CURRENT INTENSITY IS BASED
ON RECENT OBSERVATIONS IN THE REGION WITH THE MAXIMUM SUSTAINED
WINDS OBSERVED AT 1800Z FROM CHOSHI, JAPAN REPORTING NORTHERLY WINDS
AT 25 KNOTS. TD 18W IS CURRENTLY TRACKING EAST-NORTHEAST ALONG THE
NORTHERN PERIPHERY OF A DEEP-LAYERED SUBTROPICAL RIDGE. DYNAMIC
MODEL GUIDANCE IS IN GOOD AGREEMENT, LENDING HIGH CONFIDENCE TO THE
FORECAST TRACK. 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 201800Z IS 12 FEET.
//