WTPN31 PGTW 052100

MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//

SUBJ/TROPICAL CYCLONE WARNING//

RMKS/

1. TROPICAL DEPRESSION 04W (MAYSAK) WARNING NR 040

   DOWNGRADED FROM TROPICAL STORM 04W

   02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC

   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE

   WIND RADII VALID OVER OPEN WATER ONLY

    ---

   WARNING POSITION:

   051800Z --- NEAR 18.3N 119.1E

     MOVEMENT PAST SIX HOURS - 295 DEGREES AT 15 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: 18.3N 119.1E

    ---

   FORECASTS:

   12 HRS, VALID AT:

   060600Z --- 19.5N 117.8E

   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: 300 DEG/ 07 KTS

    ---

   24 HRS, VALID AT:

   061800Z --- 20.2N 116.5E

   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT

   WIND RADII VALID OVER OPEN WATER ONLY

   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER

    ---

REMARKS:

052100Z POSITION NEAR 18.6N 118.8E.

TROPICAL DEPRESSION 04W (MAYSAK), LOCATED APPROXIMATELY 365 NM

SOUTHEAST OF HONG KONG, HAS TRACKED WEST-NORTHWESTWARD AT 15

KNOTS OVER THE PAST SIX HOURS. ANIMATED ENHANCED INFRARED (EIR)

SATELLITE IMAGERY REVEALS THAT THE BULK OF THE DEEP CONVECTION HAS

WARMED AND SHEARED AWAY FROM THE LOW LEVEL CIRCULATION CENTER, WHICH

HAS UNRAVELED OVER THE PAST 12 HOURS. RECENT MICROWAVE IMAGES STILL

INDICATE A BROAD AREA OF CYCLONIC TURNING, BUT THERE IS NO DEFINED

SYSTEM CENTER SINCE TD 04W REEMERGED IN THE SOUTH CHINA SEA. THE

INITIAL POSITION AND INTENSITY IS BASED ON THE EIR ANIMATION AND

POOR STRUCTURE ILLUSTRATED IN THE AFOREMENTIONED MICROWAVE IMAGES

WITH LOW CONFIDENCE. UPPER-LEVEL ANALYSIS IS MARGINAL AS THE SYSTEM

REMAINS IN AN AREA OF MODERATE (15 TO 20 KNOT) NORTHWESTERLY

VERTICAL WIND SHEAR (VWS) AND WEAK RADIAL OUTFLOW. THE CYCLONE IS

TRACKING ALONG THE SOUTHWESTERN PERIPHERY OF THE DEEP LAYERED

SUBTROPICAL RIDGE (STR). 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 051800Z IS 10 FEET. REFER TO TROPICAL DEPRESSION 05W (HAISHEN)

WARNINGS (WTPN32 PGTW) FOR SIX-HOURLY UPDATES.//