Subject: Indian-S: 01 Active Tropical Cyclone In Southern Hemisphere

From: SIU Weather Processor <[email-masked]>
Date: Sun, 27 Dec 1998 08:04:35 -0600

999
WTXS31 PGTW 271500
1. TROPICAL CYCLONE 10S (CATHY) WARNING NR 006
   01 ACTIVE TROPICAL CYCLONE IN SOUTHERN HEMISPHERE
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   271200Z2 --- NEAR 16.1S8 92.7E8
     MOVEMENT PAST SIX HOURS - 295 DEGREES AT 05 KTS
     POSITION ACCURATE TO WITHIN 060 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
   REPEAT POSIT: 16.1S8 92.7E8
    ---
   FORECASTS:
   12 HRS, VALID AT:
   280000Z0 --- 15.8S4 91.4E4
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   VECTOR TO 24 HR POSIT: 280 DEG/ 07 KTS
    ---
   24 HRS, VALID AT:
   281200Z3 --- 15.6S2 90.0E9
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   VECTOR TO 36 HR POSIT: 265 DEG/ 08 KTS
    ---
   36 HRS, VALID AT:
   290000Z1 --- 15.7S3 88.4E0
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
    ---
REMARKS:
271500Z5 POSITION NEAR 16.0S7  92.4E5.
TROPICAL CYCLONE 10S (CATHY) HAS TRACKED WEST-NORTHWESTWARD AT 5
KNOTS OVER THE PAST SIX HOURS. THE WARNING POSITION AND INTENSITY
ARE BASED ON 2271130Z6 INFRARED SATELLITE IMAGERY. RECENT VISIBLE
IMAGERY CONFIRMS THAT THE SYSTEM=S MID-LEVEL AND DEEP CONVECTION IS
COMPLETELY SHEARED, EXPOSING A FAIRLY ORGANIZED SURFACE CIRCULATION
WHICH IS BEING STEERED BY THE LOW-LEVEL FLOW OF RIDGING TO THE
SYSTEMS SOUTH. AS TC 10S (CATHY) IS EXPECTED TO CONTINUE IN A HIGH
VERTICAL SHEAR ENVIRONMENT, DISSIPATION AS A SIGNIFICANT TROPICAL
CYCLONE IS ANTICIPATED NEAR THE 24 HOUR FORECAST POSITION. MAXIMUM
SIGNIFICANT WAVE HEIGHT AT 271200Z2 IS 12 FEET. NEXT WARNINGS AT
280300Z3 (DTG 280151Z7) AND 281500Z6 (DTG 281351Z0).//

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