• Pacific-NW: TD Choi-Wan F

    From Weather Alert@1:2320/105 to All on Mon Jun 7 15:54:00 2021
    WTPN31 PGTW 051500
    MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
    SUBJ/TROPICAL DEPRESSION 04W (CHOI-WAN) WARNING NR 028//
    RMKS/
    1. TROPICAL DEPRESSION 04W (CHOI-WAN) WARNING NR 028
    DOWNGRADED FROM TROPICAL STORM 04W
    01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC
    MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    WIND RADII VALID OVER OPEN WATER ONLY
    ---
    WARNING POSITION:
    051200Z --- NEAR 27.9N 128.5E
    MOVEMENT PAST SIX HOURS - 055 DEGREES AT 27 KTS
    POSITION ACCURATE TO WITHIN 050 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: 27.9N 128.5E
    ---
    FORECASTS:
    12 HRS, VALID AT:
    060000Z --- 31.4N 134.7E
    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: 060 DEG/ 30 KTS
    ---
    24 HRS, VALID AT:
    061200Z --- 34.4N 140.8E
    MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
    WIND RADII VALID OVER OPEN WATER ONLY
    DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
    ---
    REMARKS:
    051500Z POSITION NEAR 28.8N 130.0E.
    05JUN21. TROPICAL DEPRESSION 04W (CHOI-WAN), LOCATED APPROXIMATELY 92
    NM NORTH-NORTHEAST OF KADENA AB, HAS TRACKED NORTHEASTWARD AT 27
    KNOTS OVER THE PAST SIX HOURS. THE CURRENT POSITION AND INTENSITY
    ALIGN WITH RECENT ASCAT DATA FROM 051157Z AND 051311Z, WHICH
    INDICATE AN ELONGATING LOW-LEVEL CIRCULATION WITH DECREASING WIND
    SPEEDS NEAR THE CENTER. TD 04W IS TRACKING RAPIDLY NORTHEASTWARD IN
    THE GRADIENT BETWEEN SUBTROPICAL RIDGING TO THE EAST AND A DEEP
    TROUGH TO THE NORTHWEST. STRONG VERTICAL WIND SHEAR (GREATER THAN 20
    KNOTS) AND PASSAGE OVER COOLER WATER (25-26 CELSIUS) ARE INDUCING
    RAPID WEAKENING. CONVECTIVE STRUCTURE HAS COMPLETELY DETERIORATED
    OVER THE PAST SIX HOURS, AND THE ONLY REMAINING DEEP CONVECTION IS
    CONFINED TO A SMALL AREA WELL TO THE NORTHEAST OF THE LOW-LEVEL
    CIRCULATION CENTER. THE SYSTEM WILL DISSIPATE WITHIN THE NEXT 12
    HOURS AS IT TRACKS NORTHEASTWARD UNDER THE CURRENT STEERING
    INFLUENCES. NUMERICAL MODEL GUIDANCE REMAINS IN TIGHT AGREEMENT, AND
    THE TRACK FORECAST LIES NEAR THE MULTI-MODEL CONSENSUS WITH HIGH
    CONFIDENCE. 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
    051200Z IS 11 FEET.
    //
    NNNN
    --- SBBSecho 3.12-Linux
    * Origin: capitolcityonline.net * Telnet/SSH:2022/HTTP (1:2320/105)