#32 Postby Matt-hurricanewatcher » Tue Apr 04, 2006 3:17 pm
WTXS21 PGTW 042030
MSGID/GENADMIN/NAVPACMETOCCEN PEARL HARBOR HI/JTWC//
SUBJ/TROPICAL CYCLONE FORMATION ALERT/042021ZAPR2006//
RMKS/
1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN 130
NM EITHER SIDE OF A LINE FROM 13.6S 115.5E TO 17.7S 113.5E WITHIN THE
NEXT 12 TO 24 HOURS. AVAILABLE DATA DOES NOT JUSTIFY ISSUANCE OF NUM-
BERED TROPICAL CYCLONE WARNINGS AT THIS TIME. WINDS IN THE AREA ARE
ESTIMATED TO BE 25 TO 30 KNOTS. METSAT IMAGERY AT 041730Z INDICATES
THAT A CIRCULATION CENTER IS LOCATED NEAR 14.8S 114.9E. THE SYSTEM IS
MOVING SOUTH-SOUTHWESTWARD AT 06 KNOTS.
2. REMARKS: THE AREA OF CONVECTION PREVIOUSLY LOCATED NEAR 14.3S
115.2E IS NOW LOCATED NEAR 14.8S 114.9E, APPROXIMATELY 445 NM NORTH
OF LEARMONTH, AUSTRALIA. RECENT ENHANCED WATER VAPOR IMAGERY REVEALS
AN INCREASE IN RADIAL OUTFLOW AND A DEVELOPING POLEWARD OUTFLOW
CHANNEL. UPPER LEVEL ANALYSIS INDICATES THE LOW LEVEL CIRCULATION
CENTER (LLCC) IS SITUATED EQUATORWARD OF THE SUBTROPICAL RIDGE AXIS
AND NOW BEGINNING TO TRACK POLEWARD INTO THE RIDGE. ADDITIONALLY, THE
LLCC IS IN AN ENVIRONMENT OF LOW TO MODERATE VERTICAL WIND SHEAR WITH
FAVORABLE DIVERGENCE ALOFT. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTI-
MATED AT 25 TO 30 KNOTS. MINIMUM SEA LEVEL PRESSURE TO BE NEAR 1000
MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL
CYCLONE WITHIN THE NEXT 24 HOURS IS UPGRADED TO GOOD.
3. THIS ALERT WILL BE REISSUED, UPGRADED TO WARNING OR CANCELLED BY
052030Z.//
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