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Meow|2017-10-31 10:19
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才幾個小時,直接TCFA。
WTPN21 PGTW 310130
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE FORMATION ALERT//
RMKS/
1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN
160 NM EITHER SIDE OF A LINE FROM 7.7N 110.6E TO 9.9N 104.7E
WITHIN THE NEXT 12 TO 24 HOURS. AVAILABLE DATA DOES NOT JUSTIFY
ISSUANCE OF NUMBERED TROPICAL CYCLONE WARNINGS AT THIS TIME.
WINDS IN THE AREA ARE ESTIMATED TO BE 17 TO 23 KNOTS. METSAT
IMAGERY AT 310000Z INDICATES THAT A CIRCULATION CENTER IS LOCATED
NEAR 7.9N 110.2E. THE SYSTEM IS MOVING WEST-NORTHWESTWARD AT 11
KNOTS.
2. REMARKS: AN AREA OF CONVECTION (INVEST 95W) HAS PERSISTED NEAR
7.9N 110.2E, APPROXIMATELY 261 NM ESE OF HO CHI MINH CITY, VIETNAM,
IN THE SOUTH CHINA SEA. ANIMATED ENHANCED INFRARED AND MULTISPECTRAL
SATELLITE IMAGERY SHOWS FLARING DEEP CONVECTION AND LOW LEVEL CLOUDS
WRAPPING INTO THE COVERED LOW LEVEL CIRCULATION CENTER. A 301342Z
ASCAT PASS REVEALS A TIGHT OVAL CIRCULATION WITH 10-15 KT WIND
BARBS, THOUGH MANY BARBS ARE FLAGGED CONTAMINATED. A 301330 OSCAT
PASS DEPICTS 15-20 KT WINDS, CONCENTRATED IN THE NORTHERN AND
NORTHEASTERN PORTIONS OF THE DISTURBANCE RELATED TO STRONG
STRAIGHTLINE NORTHEASTERLY FLOW THROUGH THE SOUTH CHINA SEA, AND 10
KT WINDS IN THE SOUTHERN HALF OF THE DISTURBANCE. UPPER-LEVEL
ANALYSIS INDICATES A FAIR ENVIRONMENT FOR DEVELOPMENT WITH
STRENGTHENING DIVERGENCE ALOFT AND EQUATORWARD OUTFLOW. 95W IS
LOCATED IN AN AREA OF LOW VERTICAL WIND SHEAR (5-10 KT), AND SST
VALUES ARE FAVORABLE AT 29-30C. GLOBAL MODELS SHOW THE CIRCULATION
PERSISTING AND MOVING WESTWARD, THEN DEVELOPING IN THE BAY OF
BENGAL, WEST OF THE MALAY PENINSULA, AT THE END OF THE FORECAST
PERIOD. 18Z MODEL RUNS ARE MORE OPTIMISTIC FOR DISTURBANCE
INTENSIFICATION AROUND THE MALAY PENINSULA. MAXIMUM SUSTAINED
SURFACE WINDS ARE ESTIMATED AT 17 TO 23 KNOTS. MINIMUM SEA LEVEL
PRESSURE IS ESTIMATED TO BE NEAR 1005 MB. THE POTENTIAL FOR THE
DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24
HOURS IS HIGH.
3. THIS ALERT WILL BE REISSUED, UPGRADED TO WARNING OR CANCELLED BY
010130Z.
//
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