簽到天數: 2141 天 [LV.Master]伴壇終老
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周子堯@FB|2016-8-19 07:53
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大J發布了TCFA!!
WTPN21 PGTW 182300
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE FORMATION ALERT//
RMKS/
1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN
215 NM EITHER SIDE OF A LINE FROM 24.2N 154.5E TO 33.0N 148.9E
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 15 TO 20 KNOTS. METSAT
IMAGERY AT 181800Z INDICATES THAT A CIRCULATION CENTER IS LOCATED
NEAR 25.0N 154.1E. THE SYSTEM IS MOVING NORTH-NORTHEASTWARD AT 19
KNOTS.
2. REMARKS: THE AREA OF CONVECTION (INVEST 98W) PREVIOUSLY LOCATED
NEAR 19.3N 149.5E, IS NOW LOCATED NEAR 25.0N 154.1E, APPROXIMATELY
970 NM SOUTHEAST OF YOKOSUKA, JAPAN. ANIMATED MULTISPECTRAL
SATELLITE IMAGERY DEPICTS AN AREA OF PERSISTENT DEEP CONVECTION
ALONG THE EASTERN FLANK WRAPPING INTO A CONSOLIDATING LOW LEVEL
CIRCULATION CENTER (LLCC). AN 182009Z SSMIS 91GHZ IMAGE FURTHER
SHOWS WELL-DEFINED SHALLOW BANDING WRAPPING INTO THE LLCC WITH THE
BULK OF CONVECTION ALONG THE EASTERN SEMI-CIRCLE. ENVIRONMENTAL
CONDITIONS ARE MARGINALLY FAVORABLE WITH STRONG DIVERGENT OUTFLOW
OFFSETTING THE MODERATE (15-20 KNOT) VERTICAL WIND SHEAR. THE
DISTURBANCE IS EMBEDDED WITHIN THE MONSOON GYRE AND MODELS SHOW
DEVELOPMENT INTO A TROPICAL CYCLONE IN THE NEXT 12 TO 24 HOURS.
MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 15 TO 20 KNOTS.
MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 996 MB. DO TO THE
CONSOLIDATION OF THE LLCC, 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
192300Z.//
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