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

From: SIU Weather Processor <[email-masked]>
Date: Sun, 8 Mar 1998 08:23:55 -0600

015
WTXS31 PGTW 081500
1. TROPICAL CYCLONE 26S (DONALINE) WARNING NR 005
   01 ACTIVE TROPICAL CYCLONE IN SOUTHERN HEMISPHERE
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   081200Z1 --- 20.7S9 069.9E4
     MOVEMENT PAST SIX HOURS - 180 DEGREES AT 06 KTS

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     POSITION ACCURATE TO WITHIN 060 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 050 KT, GUSTS 060 KT
   RADIUS OF 035 KT WINDS - 115 NM EAST SEMICIRCLE
                            085 NM ELSEWHERE
   REPEAT POSIT: 20.7S9 069.9E4
    ---
   FORECASTS:
   12 HRS, VALID AT:
   090000Z9 --- 21.9S2 070.0E7
   MAX SUSTAINED WINDS - 050 KT, GUSTS 060 KT
   RADIUS OF 035 KT WINDS - 115 NM EAST SEMICIRCLE
                            085 NM ELSEWHERE
   VECTOR TO 24 HR POSIT: 180 DEG/ 06 KTS
    ---
   24 HRS, VALID AT:
   091200Z2 --- 23.0S5 070.1E8
   MAX SUSTAINED WINDS - 050 KT, GUSTS 060 KT
   RADIUS OF 035 KT WINDS - 105 NM EAST SEMICIRCLE

PAGE 03 RUHPSGG3974 UNCLAS
                            075 NM ELSEWHERE
   VECTOR TO 36 HR POSIT: 180 DEG/ 06 KTS
    ---
   36 HRS, VALID AT:
   100000Z1 --- 24.1S7 070.2E9
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   RADIUS OF 035 KT WINDS - 095 NM EAST SEMICIRCLE
                            065 NM ELSEWHERE
   VECTOR TO 48 HR POSIT: 175 DEG/ 06 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   101200Z4 --- 25.3S0 070.3E0
   MAX SUSTAINED WINDS - 035 KT, GUSTS 040 KT
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
    ---
REMARKS:
081500Z4 POSITION 21.0S3   069.9E4.
TROPICAL CYCLONE 26S (DONALINE) IS TRACKING SOUTHWARD AT 06

PAGE 04 RUHPSGG3974 UNCLAS
KNOTS. POSITION CONFIDENCE IS LOW DUE TO INCOMPLETE SATELLITE
COVERAGE OF THIS AREA.  THE WARNING POSITION AND INTENSITY ARE
BASED ON 080830Z9 INFRARED SATELLITE IMAGERY. TROPICAL CYCLONE
26S (DONALINE) IS FORECAST TO MAINTAIN ITS CURRENT INTENSITY
FOR THE NEXT 24-HOURS, FOLLOWED BY A WEAKENING TREND AS IT
ENTERS A REGION OF MODERATE VERTICAL WIND SHEAR. FORECAST WIND
RADII ARE BASED ON EXTRAPOLATION OF CURRENT WIND RADII AND
ADJUSTED IN THE OUTLOOK PERIOD AS THE CYCLONE BEGINS TO WEAKEN.
TROPICAL CYCLONE 26S (DONALINE) IS EXPECTED TO CONTINUE
TRACKING SLOWLY SOUTHWARD THROUGHOUT THE FORECAST PERIOD.
MAXIMUM SIGNIFICANT WAVE HEIGHT AT 081200Z IS 15 FEET. NEXT
WARNINGS AT 090300Z2 (DTG 090151Z6) AND 091500Z5 (DTG 091351Z9).//
BT
#3974

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