000
WTNT80 EGRR 061800

 MET OFFICE TROPICAL CYCLONE GUIDANCE FOR NORTH-EAST PACIFIC

 AND ATLANTIC

             GLOBAL MODEL DATA TIME 12UTC 06.09.2011

             HURRICANE KATIA      ANALYSED POSITION : 27.0N  65.6W

     ATCF IDENTIFIER : AL122011

  VERIFYING TIME     POSITION     STRENGTH        TENDENCY
  --------------     --------     --------        --------
 12UTC 06.09.2011  27.0N  65.6W   INTENSE
 00UTC 07.09.2011  27.8N  67.6W   INTENSE       LITTLE CHANGE
 12UTC 07.09.2011  28.7N  68.8W   INTENSE    WEAKENING SLIGHTLY
 00UTC 08.09.2011  30.3N  70.2W   INTENSE       LITTLE CHANGE
 12UTC 08.09.2011  32.1N  70.8W    STRONG    WEAKENING SLIGHTLY
 00UTC 09.09.2011  34.8N  70.4W   INTENSE   INTENSIFYING SLIGHTLY
 12UTC 09.09.2011  37.2N  69.0W   INTENSE   INTENSIFYING SLIGHTLY
 00UTC 10.09.2011  39.7N  64.4W   INTENSE   INTENSIFYING RAPIDLY
 12UTC 10.09.2011  41.3N  55.8W   INTENSE     WEAKENING RAPIDLY
 00UTC 11.09.2011   EXTRA-TROPICAL

             NEW TROPICAL STORM FORECAST TO DEVELOP AFTER  12 HOURS
                   FORECAST POSITION AT T+ 12 : 11.2N  37.4W

  VERIFYING TIME     POSITION     STRENGTH        TENDENCY
  --------------     --------     --------        --------
 00UTC 07.09.2011  11.2N  37.4W   MODERATE
 12UTC 07.09.2011  11.6N  40.6W   MODERATE      LITTLE CHANGE
 00UTC 08.09.2011  12.2N  44.2W   MODERATE   WEAKENING SLIGHTLY
 12UTC 08.09.2011  12.5N  47.6W   MODERATE      LITTLE CHANGE
 00UTC 09.09.2011  13.2N  51.1W   MODERATE      LITTLE CHANGE
 12UTC 09.09.2011  14.0N  54.4W   MODERATE  INTENSIFYING SLIGHTLY
 00UTC 10.09.2011  14.6N  57.4W    STRONG   INTENSIFYING SLIGHTLY
 12UTC 10.09.2011  15.6N  60.6W    STRONG   INTENSIFYING SLIGHTLY
 00UTC 11.09.2011  17.0N  63.1W   INTENSE   INTENSIFYING SLIGHTLY
 12UTC 11.09.2011  18.7N  65.5W   INTENSE   INTENSIFYING SLIGHTLY
 00UTC 12.09.2011  20.2N  67.6W   INTENSE       LITTLE CHANGE
 12UTC 12.09.2011  22.1N  69.4W   INTENSE       LITTLE CHANGE

             NEW TROPICAL STORM FORECAST TO DEVELOP AFTER  24 HOURS
                   FORECAST POSITION AT T+ 24 : 19.6N  92.7W

  VERIFYING TIME     POSITION     STRENGTH        TENDENCY
  --------------     --------     --------        --------
 12UTC 07.09.2011  19.6N  92.7W   MODERATE
 00UTC 08.09.2011  20.2N  92.6W   MODERATE  INTENSIFYING SLIGHTLY
 12UTC 08.09.2011  20.5N  92.4W    STRONG   INTENSIFYING RAPIDLY
 00UTC 09.09.2011  21.0N  92.3W    STRONG       LITTLE CHANGE
 12UTC 09.09.2011  21.5N  92.4W   INTENSE   INTENSIFYING SLIGHTLY
 00UTC 10.09.2011  22.4N  92.7W   INTENSE   INTENSIFYING SLIGHTLY
 12UTC 10.09.2011  23.5N  92.3W   INTENSE       LITTLE CHANGE
 00UTC 11.09.2011  24.5N  92.0W   INTENSE       LITTLE CHANGE
 12UTC 11.09.2011  24.9N  91.9W   INTENSE       LITTLE CHANGE
 00UTC 12.09.2011  24.7N  91.9W   INTENSE    WEAKENING SLIGHTLY
 12UTC 12.09.2011  24.4N  91.9W    STRONG    WEAKENING SLIGHTLY




 THIS INFORMATION IS PROVIDED AS GUIDANCE FOR TROPICAL CYCLONE
 RSMCS. IT REQUIRES INTERPRETATION BY TROPICAL CYCLONE SPECIALISTS
 AND SHOULD NOT BE CONSIDERED AS A FINAL PRODUCT


 MET OFFICE, EXETER, UK

 TOO 061655