#8 Postby Extratropical94 » Fri Apr 29, 2011 1:38 pm
JTWC 1800Z:
THE AREA OF CONVECTION PREVIOUSLY LOCATED NEAR 10.8N
86.0E, IS NOW LOCATED NEAR 9.5N 86.5E, APPROXIMATELY 420 NM EAST-
NORTHEAST OF COLOMBO, SRI LANKA. ALTHOUGH THE LOW LEVEL CIRCULATINON
CENTER (LLCC) HAS BEEN WEAKLY DEFINED AND SLOW TO DEVELOP, ANIMATED
MULTISPECTRAL SATELLITE IMAGERY DURING THE DAYLIGHT HOURS SHOWED A
CLEAR CIRCULATION WITH CONVECTION STRUGGLING TO ORGANIZE AROUND THE
CENTER. A 291358Z 91GHZ SSMIS MICROWAVE IMAGERY REVEALS DEEP
CONVECTION OVER THE SOUTHERN PERIPHERY OF THE LLCC, AND THE 37GHZ
IMAGE SHOWS A HINT OF CURVED CONVECTIVE BANDING. SCATTERED
CONVECTION EXISTS ON ALL SIDES OF THE LLCC. THE 291200Z UPPER LEVEL
STREAMLINE ANALYSIS CONFIRMS THAT THE LLCC IS DRIFTING DIRECTLY
UNDER THE SUB-TROPICAL RIDGE AXIS IN A REGION OF FAVORABLE
DIFFLUENCE AND WEAK VERTICAL WIND SHEAR. THE GRADIENT LEVEL
STREAMLINE ANALYSIS SHOWS A WELL-DEVELOPED WESTERLY WIND FIELD OVER
THE SOUTHERN BAY OF BENGAL. SEA SURFACE TEMPERATURES ARE ESTIMATED
AT 29 TO 31 DEGREES CELSIUS. MAXIMUM SUSTAINED SURFACE WINDS ARE
ESTIMATED AT 15 TO 20 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED
TO BE NEAR 1005 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A
SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS REMAINS POOR.
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