Friday, November 25, 2011

"98B" - Having signs of a Cyclone ! and moving N-W

Now its a "well marked low"
Position :: 4.9 N and 78.3 E
Pressure :: 1001 mb
Wind :: 30 to 60 Km/Hr

JTWC warning
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FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN
160 NM EITHER SIDE OF A LINE FROM 4.1N 79.3E TO 10.4N 72.8E WITH-
IN THE NEXT 12 TO 24 HOURS.  AVAILABLE DATA DOES NOT JUSTIFY IS-
SUANCE OF NUMBERED TROPICAL CYCLONE WARNINGS AT THIS TIME.  WINDS
IN THE AREA ARE ESTIMATED TO BE 25 TO 30 KNOTS. METSAT IMAGERY AT
250730Z INDICATES THAT A CIRCULATION CENTER IS LOCATED NEAR 4.9N
78.3E.  THE SYSTEM IS MOVING NORTHWESTWARD AT 13 KNOTS.
2. REMARKS: THE AREA OF CONVECTION PREVIOUSLY LOCATED NEAR 4.1N 
79.3E, IS NOW LOCATED NEAR 4.9N 78.3E, APPROXIMATELY 150 NM 
SOUTHWEST OF COLOMBO, SRI LANKA. RECENT ANIMATED MULTISPECTRAL 
SATELLITE IMAGERY SHOWS DEEP PERIPHERAL CONVECTION ASSOCIATED WITH 
CONVERGING NORTHERLIES INTO WESTERLIES. A 250431Z ASCAT IMAGE 
INDICATES 25 KNOT EASTERLIES POLEWARD OF 25-30 KNOT WESTERLIES NEAR 
THE LOW LEVEL CIRCULATION CENTER (LLCC). A 250253Z 37 GHZ SSMIS 
IMAGE SHOWS TIGHTLY CURVED BANDING IN THE LOWER LEVEL CONVECTIVE 
STRUCTURE WITH A LARGE, SOMEWHAT LINEAR, CONVECTIVE BAND OVER THE 
SOUTHERN PORTION OF THE SYSTEM. UPPER LEVEL ANALYSIS INDICATES THAT 
THE LLCC IS UNDER A POINT SOURCE OF DIVERGENCE WITH WEAK (05-10 
KNOT) VERTICAL WIND SHEAR. RECENT ANIMATED WATER VAPOR IMAGERY SHOWS 
EXCELLENT RADIAL OUTFLOW. MAXIMUM SUSTAINED SURFACE WINDS ARE 
ESTIMATED AT 25 TO 30 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED 
TO BE NEAR 1001 MB. DUE TO THE 25-30 KNOT WINDS NEAR THE LLCC, 
EXCELLENT UPPER LEVEL DIVERGENCE AND OUTFLOW, AND ACTIVE PHASE OF 
THE MADDEN-JULIAN OSCILLATION IN THE REGION, THE POTENTIAL FOR THE 
DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 
HOURS IS HIGH.

IMD warning
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Latest satellite IR shot, 
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JTWC projected path
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Model prediction
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By morning of 26-Nov.. the system is expected to enter into S-E corner of Arabian sea just S-W of Trivandrum and by morning of 27-Nov.. it's expected to move N-W further into Arabian sea and intensify !
Heavy rain to continue all along Tamilnadu coast till evening of 27-Nov-2011.

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