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shadow16|2014-9-6 15:29
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TCFA !
WTPN22 PGTW 060730
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE FORMATION ALERT//
REF/A/JOINT TYPHOON WRNCEN PEARL HARBOR HI/060151Z SEP 14//
AMPN/REF A IS TROPICAL CYCLONE FORMATION ALERT (WTPN21 PGTW 060200)//
RMKS/
1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN
175 NM EITHER SIDE OF A LINE FROM 16.2N 118.0E TO 19.0N 112.3E
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 060600Z INDICATES THAT A CIRCULATION CENTER IS LOCATED
NEAR 16.5N 116.6E. THE SYSTEM IS MOVING NORTH-NORTHWESTWARD AT 11
KNOTS.
2. REMARKS: THE AREA OF CONVECTION PREVIOUSLY LOCATED NEAR 15.4N
116.9E, IS NOW LOCATED NEAR 16.5N 116.6E, APPROXIMATELY 380 NM SOUTH-
SOUTHEAST OF HONG KONG. ANIMATED MSI DEPICTS PERSISTENT FLARING DEEP
CONVECTION ASSOCIATED WITH A CONSOLIDATING LOW-LEVEL CIRCULATION
CENTER (LLCC). A 060140Z METOP-B MICROWAVE IMAGE REVEALS FRAGMENTED
CONVECTIVE BANDING WRAPPING INTO THE CENTER. A 060140Z ASCAT PASS
SHOWS AN ELONGATED 10 TO 15 KNOT CIRCULATION WITH 15 TO 20 KNOTS
OVER THE NORTHERN SEMI-CIRCLE. UPPER-LEVEL ANALYSIS INDICATES THE
SYSTEM IS NOW LOCATED IN A FAVORABLE ENVIRONMENT WITH LOW TO
MODERATE (05 TO 15 KNOT) VWS AND GOOD EQUATORWARD OUTFLOW. MAXIMUM
SUSTAINED SURFACE WINDS ARE ESTIMATED AT 15 TO 20 KNOTS. MINIMUM SEA
LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1003 MB. DUE TO PERSISTENT
CONVECTION AND INCREASED CONSOLIDATION, 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
070730Z.
4. SEE REF A FOR DETAILS ON A TROPICAL CYCLONE FORMATION ALERT
LOCATED NEAR 22.5N 127.3E//
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