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HKWCFC網主|2012-7-27 17:05
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顯示全部樓層
jtwc報告, 留意highlights
THE AREA OF CONVECTION PREVIOUSLY LOCATED NEAR 23.3N
147.8E, IS NOW LOCATED NEAR 24.3n 147.8E, APPROXIMATELY 375 NM EAST
OF IWO-TO, JAPAN. ANIMATED MULTISPECTRAL SATELLITE IMAGERY SHOWS
CONVECTION HAS FURTHER CONSOLIDATED AROUND THE LLCC. THIS CONVECTION
WAS ORIGINALLY ASSOCIATED WITH THE DIVERGENT, NORTHERN REGION OF A
TROPICAL UPPER-TROPOSPHERIC TROUGH (TUTT) CELL. DURING THE PAST 12
HOURS, A CLOSED LLCC HAS DEVELOPED WITH PERSISTENT CONVECTION. AS THE
ORIGINAL TUTT CELL WEAKENS TO THE SOUTH OF THE DEEP CONVECTION,
ANIMATED WATER VAPOR SATELLITE IMAGERY SUGGESTS THAT AN UPPER-LEVEL
ANTICYCLONE IS BEGINNING TO BUILD. FURTHERMORE, THE RECENT
DEVELOPMENT OF OVERSHOOTING TOPS SUGGESTS SURFACE-BASED DEEP
CONVECTIVE CELLS NEAR THE LLCC. AMSU CROSS-SECTIONS DO NOT YET DEPICT
A WARM-CORE, BUT CYCLONE PHASE SPACE FORECASTS SUGGEST THAT THE
SYSTEM IS UNDERGOING A GRADUAL TRANSITION TO A WARM-CORE STRUCTURE.
SEA SURFACE TEMPERATURES IN THE VICINITY OF THE SYSTEM RANGE FROM 29
TO 31C. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 10 TO 15
KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1009 MB. IN
VIEW OF THE INCREASED ORGANIZATION, THE POTENTIAL FOR THE DEVELOPMENT
OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS IS
UPGRADED TO MEDIUM |
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