Subject: Indian-S: 1. Tropical Cyclone 32s (gemma) Warning Nr 005a Amended

From: SIU Weather Processor <[email-masked]>
Date: Thu, 9 Apr 1998 01:29:16 -0500

930
WTXS31 PGTW 090900 AMD
IMMEDIATE DELIVERY REQ TO AMEMBASSY PORT LOUIS
1. TROPICAL CYCLONE 32S (GEMMA) WARNING NR 005A AMENDED
   01 ACTIVE TROPICAL CYCLONE IN SOUTHERN HEMISPHERE
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   090600Z5 --- 14.9S4 71.4E2
     MOVEMENT PAST SIX HOURS - 245 DEGREES AT 04 KTS
     POSITION ACCURATE TO WITHIN 060 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 055 KT, GUSTS 065 KT
   RADIUS OF 050 KT WINDS - 010 NM
   RADIUS OF 035 KT WINDS - 045 NM SOUTHEAST SEMICIRCLE
                            035 NM ELSEWHERE
   REPEAT POSIT: 14.9S4 71.4E2
    ---
   FORECASTS:
   12 HRS, VALID AT:
   091800Z8 --- 15.1S7 70.7E4
   MAX SUSTAINED WINDS - 055 KT, GUSTS 065 KT
   RADIUS OF 050 KT WINDS - 010 NM
   RADIUS OF 035 KT WINDS - 050 NM SOUTHEAST SEMICIRCLE
                            040 NM ELSEWHERE
   VECTOR TO 24 HR POSIT: 250 DEG/ 05 KTS
    ---
   24 HRS, VALID AT:
   100600Z7 --- 15.4S0 69.8E3
   MAX SUSTAINED WINDS - 060 KT, GUSTS 070 KT
   RADIUS OF 050 KT WINDS - 015 NM
   RADIUS OF 035 KT WINDS - 055 NM SOUTHEAST SEMICIRCLE
                            045 NM ELSEWHERE
   VECTOR TO 36 HR POSIT: 240 DEG/ 05 KTS
    ---
   36 HRS, VALID AT:
   101800Z0 --- 15.9S5 68.9E3
   MAX SUSTAINED WINDS - 065 KT, GUSTS 075 KT
   RADIUS OF 050 KT WINDS - 020 NM
   RADIUS OF 035 KT WINDS - 060 NM SOUTHEAST SEMICIRCLE
                            050 NM ELSEWHERE
   VECTOR TO 48 HR POSIT: 235 DEG/ 05 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   110600Z8 --- 16.5S2 68.0E4
   MAX SUSTAINED WINDS - 065 KT, GUSTS 075 KT
   RADIUS OF 050 KT WINDS - 020 NM
   RADIUS OF 035 KT WINDS - 060 NM SOUTHEAST SEMICIRCLE
                            050 NM ELSEWHERE
    ---
REMARKS:
090900Z8 POSITION 15.0S6   71.2E0.
TROPICAL CYCLONE 32S (GEMMA) IS TRACKING WEST-SOUTHWESTWARD AT 04
KNOTS. THIS WARNING WAS AMENDED BASED ON A COMBINATION OF
090033Z5 AND 090218Z0 MICROWAVE IMAGERY INDICATING THE LOW-LEVEL
CIRCULATION CENTER WAS LOCATED 120 NM TO THE SOUTHEAST OF OUR ORIGINA
L
WARNING POSITION. THERE IS NO SIGNIFICANT CHANGE TO OUR FORECAST
PHILOSOPHY.  WE ARE EXPECTING TC 32S (GEMMA) TO TRACK SOUTHWESTWARD
UNDER THE INFLUENCE OF THE SUBTROPICAL RIDGE LOCATED TO IT SOUTH.
TC 32S (GEMMA) IS FORECAST TO SLOWLY INTENSIFY THROUGHOUT THE
FORECAST PERIOD. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 090000Z IS 14
FEET. NEXT WARNINGS AT 092100Z2 (DTG 091951Z5) AND 100900Z0 (DTG
100751Z4).//

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