Subject: Indian-S: Technical Discussion (Automatic)

From: SIU Weather Processor <[email-masked]>
Date: Wed, 29 Jan 1997 19:33:46 -0600

777
WTXS32 PGTW 300300
IMMEDIATE DELIVERY REQ TO AMEMBASSY PORT LOUIS
1. TROPICAL CYCLONE 20S (GRETELLE) WARNING NR 023
   02 ACTIVE TROPICAL CYCLONES IN SOUTHIO
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   300000Z3 --- 27.3S2 37.5E5
     MOVEMENT PAST SIX HOURS - 180 DEGREES AT 04 KTS
     POSITION ACCURATE TO WITHIN 090 NM
     POSITION BASED ON CENTER LOCATED BY A COMBINATION OF
     SATELLITE AND EXTRAPOLATION
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   RADIUS OF 035 KT WINDS - 185 NM NORTHWEST SEMICIRCLE
                            110 NM ELSEWHERE
   REPEAT POSIT: 27.3S2 37.5E5
    ---
   FORECASTS:
   12 HRS, VALID AT:
   301200Z6 --- 27.9S8 37.6E6
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   RADIUS OF 035 KT WINDS - 185 NM NORTHWEST SEMICIRCLE
                            110 NM ELSEWHERE
   VECTOR TO 24 HR POSIT: 155 DEG/ 03 KTS
    ---
   24 HRS, VALID AT:
   310000Z4 --- 28.5S5 37.9E9
   MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
   RADIUS OF 035 KT WINDS - 160 NM WEST SEMICIRCLE
                            100 NM ELSEWHERE
   VECTOR TO 36 HR POSIT: 140 DEG/ 04 KTS
    ---
   36 HRS, VALID AT:
   311200Z7 --- 29.1S2 38.5E6
   MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
   RADIUS OF 035 KT WINDS - 150 NM SOUTHWEST SEMICIRCLE
                            100 NM ELSEWHERE
   VECTOR TO 48 HR POSIT: 140 DEG/ 04 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   010000Z1 --- 29.7S8 39.1E3
   MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER
WATER
   RADIUS OF 035 KT WINDS - 140 NM SOUTHWEST SEMICIRCLE
                            095 NM ELSEWHERE
    ---
REMARKS:
300300Z6 POSITION 27.5S4   37.5E5
TROPICAL CYCLONE 2OS (GRETELLE) IS MOVING SOUTHWARD AT 04
KNOTS. SYSTEM IS EXPECTED TO CONTINUE TO WEAKEN AS IT
GAINS LATITUDE AND MOVES INTO A STRONGER VERTICAL WIND
SHEAR ENVIRONMENT. WIND RADII HAVE BEEN EXPANDED BASED ON
A 290740Z SCATTEROMETER PASS. NEXT WARNINGS AT 301500Z9
(DTG 301355Z7) AND 310300Z7 (DTG 310155Z5). MAXIMUM
SIGNIFICANT WAVE HEIGHT AT 300000Z IS 18 FEET. REFER TO
TROPICAL CYCLONE 19S (PANCHO-HELINDA) WARNINGS (WTXS31
PGTW) FOR TWELVE-HOURLY UPDATES.//

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