Wednesday, May 15, 2013

Cyclone "Mahasen" - Moving rapidly towards Bangladesh coast !

Analysis show that the Cyclone has moved N-N-E and that too in a fast pace.
Latest position is 17.9N , 88.2E
Pressure is still around 989 mb and wind gusts up to 83 kmph

2pm, Satellite shot shows good convective activity along its northern quadrant and Rain nearing Bangladesh.

JTWC warning at 2:30pm IST
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TROPICAL CYCLONE 01B (MAHASEN), LOCATED APPROXIMATELY 308 NM
SOUTHWARD OF KOLKATA, INDIA, HAS TRACKED NORTH-NORTHEASTWARD AT
12 KNOTS OVER THE PAST SIX HOURS. ANIMATED MULTISPECTRAL SATELLITE 
IMAGERY INDICATES THE LOW LEVEL CIRCULATION CENTER (LLCC) LOCATED 
UNDER THE EASTERN PERIPHERY OF A LARGE AREA OF DEEP CONVECTION HAS 
SEEN LITTLE IMPROVEMENT OVER THE PAST SIX HOURS. THE CURRENT 
INTENSITY HAS BEEN MAINTAINED AT 45 KNOTS BASED ON AN OLDER 141811Z 
OSCAT PASS SHOWING THE STRONGEST WINDS WERE BETWEEN 35 TO 40 KNOTS, 
IN COMBINATION WITH THE MOST RECENT DVORAK ESTIMATES FROM KNES AND 
PGTW REFLECTING A 45 KNOT SYSTEM. UPPER LEVEL ANALYSIS INDICATES AN 
ANTICYCLONE TO THE EAST OF THE LLCC IS CREATING LOW TO MODERATE 
LEVELS OF VERTICAL WIND SHEAR (VWS) ALONG THE EASTERN PERIPHERY OF 
TC 01B. VWS VALUES HAVE BEEN DECREASING OVER THE PAST 24 HOURS, 
ALLOWING FOR CONVECTION TO PERSIST OVER THE LLCC. THE STORM IS 
FORECAST TO TRACK NORTHEASTWARD ALONG THE POLEWARD ORIENTED 
SUBTROPICAL RIDGE UNTIL WESTERLY FLOW ADVECTS THE SYSTEM OVERLAND. A 
SLIGHT INTENSIFICATION OVER THE NEXT 24 HOURS IS EXPECTED AS THE 
LLCC TRACKS INTO A LOW VWS ENVIRONMENT, BUT DUE TO THE TRACK SPEED 
AND PROXIMITY TO THE COAST OF BANGLADESH, THIS INCREASE WILL BE 
SHORT-LIVED. DISSIPATION IS EXPECTED TO BEGIN UPON MAKING LANDFALL 
AFTER TAU 24 WITH FULL DISSIPATION BY TAU 48. DYNAMICAL MODEL 
GUIDANCE IS IN TIGHT AGREEMENT, LEADING THE JTWC FORECAST TO BE 
POSITIONED CLOSE TO THE MULTI-MODEL CONSENSUS WITH HIGH CONFIDENCE. 
MAXIMUM SIGNIFICANT WAVE HEIGHT AT 150600Z IS 12 FEET.

:: WARNING ::

The cyclone is expected to make landfall along S,S-E Bangladesh coast by early hrs or early morning of 16-May. Very heavy rain with high wind gusts expected over most of South,central Bangladesh, S,S-E Bengal and into South Western N-E states (Mizoram, Tirupura) of India.
People living in above mentioned zones "TAKE CARE"

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