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

From: SIU Weather Processor <[email-masked]>
Date: Sat, 7 Mar 1998 08:41:43 -0600

369
WTXS31 PGTW 071500
1. TROPICAL CYCLONE 26S (DONALINE) WARNING NR 003
   01 ACTIVE TROPICAL CYCLONE IN SOUTHERN HEMISPHERE
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   071200Z0 --- 17.9S7 70.1E8
     MOVEMENT PAST SIX HOURS - 135 DEGREES AT 07 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 - 110 NM NORTH SEMICIRCLE
                            090 NM ELSEWHERE
   REPEAT POSIT: 17.9S7 70.1E8
    ---
   FORECASTS:
   12 HRS, VALID AT:
   080000Z8 --- 18.8S7 71.2E0
   MAX SUSTAINED WINDS - 050 KT, GUSTS 060 KT
   RADIUS OF 035 KT WINDS - 115 NM NORTH SEMICIRCLE
                            105 NM ELSEWHERE
   VECTOR TO 24 HR POSIT: 140 DEG/ 07 KTS
    ---
   24 HRS, VALID AT:
   081200Z1 --- 19.8S8 72.1E0
   MAX SUSTAINED WINDS - 060 KT, GUSTS 070 KT
   RADIUS OF 050 KT WINDS - 015 NM

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   RADIUS OF 035 KT WINDS - 120 NM NORTHEAST SEMICIRCLE
                            105 NM ELSEWHERE
   VECTOR TO 36 HR POSIT: 150 DEG/ 07 KTS
    ---
   36 HRS, VALID AT:
   090000Z9 --- 21.0S3 72.9E8
   MAX SUSTAINED WINDS - 065 KT, GUSTS 075 KT
   RADIUS OF 050 KT WINDS - 025 NM NORTHEAST SEMICIRCLE
                            020 NM ELSEWHERE
   RADIUS OF 035 KT WINDS - 125 NM NORTHEAST SEMICIRCLE
                            110 NM ELSEWHERE
   VECTOR TO 48 HR POSIT: 155 DEG/ 08 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   091200Z2 --- 22.5S9 73.7E7
   MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   RADIUS OF 050 KT WINDS - 030 NM NORTHEAST SEMICIRCLE
                            025 NM ELSEWHERE

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   RADIUS OF 035 KT WINDS - 130 NM NORTHEAST SEMICIRCLE
                            115 NM ELSEWHERE
    ---
REMARKS:
071500Z3 POSITION 18.1S0   70.4E1.
TROPICAL CYCLONE 26S (DONALINE) IS MOVING SOUTHEASTWARD AT 07
KNOTS. THE WARNING POSITION IS BASED ON 071130Z INFRARED
SATELLITE IMAGERY AND ANIMATION OF THIS IMAGERY OVER THE PAST
SEVERAL HOURS. POSITIONING OF THE LOW LEVEL CENTER HAS BEEN
VERY DIFFICULT DUE TO SATELLITE COVERAGE. WATER VAPOR IMAGERY
CONTINUES TO SHOW NORTHWEST TO SOUTHEAST SHEAR ACROSS THE
SYSTEM. TROPICAL CYCLONE 26S (DONALINE) IS EXPECTED TO CONTINUE
TRACKING SLOWLY SOUTHEASTWARD TO SOUTH-SOUTHEASTWARD THROUGHOUT
THE FORECAST PERIOD UNDER THE MID-LEVEL RIDGING NORTHEAST OF
THE SYSTEM. WIND RADII ARE EXTRAPOLATED FROM PREVIOUS FORECAST.
MAXIMUM SIGNIFICANT WAVE HEIGHT AT 071200Z IS 15 FEET. NEXT
WARNINGS AT 080300Z1 (DTG 080151Z5) AND 081500Z4 (DTG
081351Z8).//
BT
#1624

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