簽到天數: 3291 天 [LV.Master]伴壇終老
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t02436|2019-10-18 13:59
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評級提升至Medium
(1) THE AREA OF CONVECTION (INVEST 97W) PREVIOUSLY LOCATED
NEAR 7.6N 171.9E, IS NOW LOCATED NEAR 8.0N 163.8E, APPROXIMATELY 710
NM EAST OF CHUUK. ANIMATED MULTISPECTRAL SATELLITE IMAGERY AND AN
180221Z 89GHZ AMSR2 MICROWAVE IMAGE DEPICT A WEAK LOW LEVEL
CIRCULATION BELOW SPARSE, FLARING CONVECTION. THE ENVIRONMENT IS
OVERALL FAVORABLE FOR FURTHER DEVELOPMENT, WITH LOW (5-10KT) VWS,
BROAD WESTWARD OUTFLOW ALOFT, AND VERY WARM (29-31C) SSTS. GLOBAL
MODELS AGREE ON A WEST-NORTHWESTWARD TRACK IN THE NEAR TERM, BUT
VARY ON DEVELOPMENT. GFS AND NAVGEM DEVELOP THE SYSTEM, INTO A
TROPICAL DEPRESSION, WHILE THE ECMWF, UKMO, AND JGSM SHOW AN 850MB
VORTICITY SIGNATURE WITH LITTLE DEVELOPMENT AT THE SURFACE. MAXIMUM
SUSTAINED SURFACE WINDS ARE ESTIMATED AT 15 TO 20 KNOTS. MINIMUM SEA
LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1009 MB. THE POTENTIAL FOR
THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24
HOURS IS UPGRADED TO MEDIUM.
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