• Pacific-W: TD Atsani W37

    From Weather Alert@21:1/175 to All on Sat Nov 7 21:23:00 2020
    WTPN32 PGTW 071500
    MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
    SUBJ/TROPICAL DEPRESSION 23W (ATSANI) WARNING NR 037//
    RMKS/
    1. TROPICAL DEPRESSION 23W (ATSANI) WARNING NR 037
    DOWNGRADED FROM TROPICAL STORM 23W
    01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC
    MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    WIND RADII VALID OVER OPEN WATER ONLY
    ---
    WARNING POSITION:
    071200Z --- NEAR 22.6N 118.6E
    MOVEMENT PAST SIX HOURS - 260 DEGREES AT 06 KTS
    POSITION ACCURATE TO WITHIN 045 NM
    POSITION BASED ON CENTER LOCATED BY A COMBINATION OF
    SATELLITE AND EXTRAPOLATION
    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: 22.6N 118.6E
    ---
    FORECASTS:
    12 HRS, VALID AT:
    080000Z --- 22.3N 117.7E
    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: 235 DEG/ 04 KTS
    ---
    24 HRS, VALID AT:
    081200Z --- 21.8N 116.9E
    MAX SUSTAINED WINDS - 015 KT, GUSTS 025 KT
    WIND RADII VALID OVER OPEN WATER ONLY
    DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
    ---
    REMARKS:
    071500Z POSITION NEAR 22.5N 118.4E.
    07NOV20. TROPICAL DEPRESSION (TD) 23W (ATSANI), LOCATED
    APPROXIMATELY 219 NM SOUTHWEST OF TAIPEI, TAIWAN, HAS TRACKED
    WESTWARD AT 06 KNOTS (KTS) OVER THE PAST SIX HOURS. ANIMATED
    ENHANCED INFRARED SATELLITE IMAGERY REVEALS RAPIDLY DECAYING,
    PARTIALLY-EXPOSED LOW LEVEL CIRCULATION. A 071010Z SSMIS COLOR
    COMPOSITE MICROWAVE IMAGE DEPICTS FAINT BANDING WRAPPING INTO A LOW
    LEVEL CIRCULATION CENTER (LLCC), WHILE A 071241Z ASCAT-A IMAGE
    CAPTURES THE INCREASING WINDS ASSOCIATED WITH THE NORTHEAST SURGE
    EVENT IN THE TAIWAN STRAIT WRAPPING AROUND THE NORTHWESTERN QUADRANT
    OF A WAVE FEATURE. MULTI-AGENCY DVORAK CURRENT INTENSITY ESTIMATES
    OF T1.5-2.0 (25-30 KTS, PGTW/RJTD) AND AN ADVANCED DVORAK CURRENT
    INTENSITY ESTIMATE OF T1.5 (25 KTS) SUPPORT THE INITIAL INTENSITY.
    THE SYSTEM CONTINUES TO BE IMPACTED BY HIGH (>35 KTS) VERTICAL WIND
    SHEAR WHICH, IN CONJUNCTION WITH COOL (25 CELSIUS) SEA SURFACE
    TEMPERATURES, WILL CONTINUE TO WEAKEN THE SYSTEM AS IT TRACKS WEST- SOUTHWESTWARD AND DISSIPATES BY TAU 12. 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 071200Z IS 12 FEET.//
    NNNN
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