Tuesday, 1 April 2014

Current Southern Hemisphere Tropical Systems Tropical Cyclone 21S (Hellen) Warning Final Warning Issued at 01/0300Z


010300Z POSITION NEAR 17.2S 46.0E. TROPICAL CYCLONE (TC) 21S (HELLEN), LOCATED APPROXIMATELY 130 NM NORTH-NORTHWEST OF ANTANANARIVO, MADAGASCAR, HAS TRACKED SOUTH- SOUTHEASTWARD AT 05 KNOTS OVER THE PAST SIX HOURS. ANIMATED INFRARED SATELLITE IMAGERY (IR) REVEALS THAT TC HELLEN HAS RAPIDLY ERODED AS THE LOW-LEVEL CIRCULATION CENTER (LLCC) HAS BECOME RAGGED AND THE MAJORITY OF THE CONVECTION HAS SHEARED AWAY AND SHALLOWED. THE SYSTEM IS EXPECTED TO STAY OVER MADAGASCAR FOR THE NEXT 36 TO 48 HOURS AND WILL DISSIPATE BELOW WARNING THRESHOLD IN THE NEXT 12 HOURS AS VERTICAL WIND SHEAR, DRY AIR, AND LAND INTERACTION CONTINUE TO HAMPER THE SYSTEM. AFTER TAU 48, NUMERIC MODEL GUIDANCE IS TRACKING TC 21S BACK OVER THE MOZAMBIQUE CHANNEL WITH A CHANCE OF REGENERATION WHILE MOVING TOWARDS THE AFRICAN LANDMASS. THIS IS THE FINAL WARNING ON THIS SYSTEM BY THE JOINT TYPHOON WRNCEN PEARL HARBOR HI. THE SYSTEM WILL BE CLOSELY MONITORED FOR SIGNS OF REGENERATION. - JTWC

Note: Hellen once again indicated how difficult it is to predict the path that a tropical storm might follow.  Yesterday Hellen was still and intense storm and predictions were that it was moving Westwards towards Africa but this morning the storm is rapidly eroded.  This is why I always  reiterate that all tropical storms must be monitored continuously as they have a will of their own.  MSBWX will continue to monitor Hellen for any signs of regeneration. - MSBWX