

by imaila.ust.hk (8.11.0/8.11.0) with ESMTP id f3L8RiY08224
for <[email-masked]>; Sat, 21 Apr 2001 16:27:44 +0800 (HKT)
Received: from vacuum.cso.uiuc.edu ([email-masked] [128.174.5.113])
by mx1.ust.hk (8.11.0/8.11.0) with ESMTP id f3L8P7Z10930
for <[email-masked]>; Sat, 21 Apr 2001 16:25:07 +0800
Received: from vacuum.cso.uiuc.edu ([email-masked] [128.174.5.113])
by vacuum.cso.uiuc.edu (8.11.2/8.11.2) with ESMTP id f3L8Sr324056;
Sat, 21 Apr 2001 03:28:53 -0500
Received: from LISTSERV.UIUC.EDU by LISTSERV.UIUC.EDU (LISTSERV-TCP/IP release
1.8d) with spool id 17118764 for [email-masked]; Sat, 21
Apr 2001 03:28:53 -0500
Received: from delyte.lib.siu.edu (delyte.lib.siu.edu [131.230.73.222]) by
vacuum.cso.uiuc.edu (8.11.2/8.11.2) with ESMTP id f3L8Sr320388 for
<[email-masked]>; Sat, 21 Apr 2001 03:28:53 -0500
Received: (from ldm@localhost) by delyte.lib.siu.edu (8.9.3+Sun/8.9.3) id
DAA08198 for [email-masked]; Sat, 21 Apr 2001 03:28:55 -0500
(CDT)
Message-ID:  <[email-masked]>
Date:         Sat, 21 Apr 2001 03:28:55 -0500
Reply-To: [email-masked]
Sender: WX-TROPL Tropical Storm and Hurricane WX products
<[email-masked]>
From: SIU Weather Processor <[email-masked]>
Subject:      Indian-S: 1. Tropical Cyclone 20s (alistair) Warning Nr 018
To: [email-masked]
Status:  O
X-Mozilla-Status: 8001
X-Mozilla-Status2: 00000000
X-UIDL: 35b414e40001b25e

WTXS31 PGTW 210900
1. TROPICAL CYCLONE 20S (ALISTAIR) WARNING NR 018
01 ACTIVE TROPICAL CYCLONE IN SOUTHERN HEMISPHERE
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
---
WARNING POSITION:
210600Z9 --- NEAR 20.5S7 110.7E9
MOVEMENT PAST SIX HOURS - 250 DEGREES AT 12 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
DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
REPEAT POSIT: 20.5S7 110.7E9
---
FORECASTS:
12 HRS, VALID AT:
211800Z2 --- 21.7S0 109.0E0
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
VECTOR TO 24 HR POSIT: 195 DEG/ 09 KTS
---
24 HRS, VALID AT:
220600Z0 --- 23.5S0 108.4E3
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
VECTOR TO 36 HR POSIT: 160 DEG/ 10 KTS
---
36 HRS, VALID AT:
221800Z3 --- 25.4S1 109.1E1
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
---
REMARKS:
210900Z2 POSITION NEAR 20.8S0 110.3E5.
TROPICAL CYCLONE (TC) 20S (ALISTAIR), LOCATED APPROXIMATELY 215 NM
WEST-NORTHWEST OF LEARMONTH, AUSTRALIA, HAS TRACKED WEST-
SOUTHWESTWARD AT 12 KNOTS OVER THE PAST 6 HOURS. THE WARNING
POSITION IS BASED ON 210530Z1 VISIBLE AND INFRARED SATELLITE
IMAGERY. THE WARNING INTENSITY IS BASED ON CURRENT INTENSITY
ESTIMATES OF 35 KNOTS. RECENT ANIMATED INFRARED ANIMATION REVEALED A
FULLY EXPOSED LOW-LEVEL CIRCULATION CENTER (LLCC) 38 NM WEST OF THE
CONVECTION. THE SYSTEM CONTINUES TO ENCOUNTER STRONG VERTICAL WIND
SHEAR ASSOCIATED WITH UPPER LEVEL WESTERLIES. TC 20S IS FORECAST TO
TRACK SOUTHWESTWARD OVER THE NEXT 24 HOURS. AFTERWARD, THE SYSTEM IS
EXPECTED TO TRACK SOUTHWESTWARD THROUGH A WEAKNESS IN THE LOW/MID
LEVEL RIDGE CREATED BY AN APPROACHING TROUGH. TC 20S IS FORECAST TO
CONTINUE WEAKENING IN AN INCREASING VERTICAL WIND SHEAR ENVIRONMENT
AND DISSIPATE BY THE END OF THE FORECAST PERIOD. MAXIMUM SIGNIFICANT
WAVE HEIGHT AT 210600Z9 IS 12 FEET. NEXT WARNINGS AT 211500Z9,
212100Z6, 220300Z7, AND 220900Z3.//

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from WX-TROPL send e-mail to [email-masked] with
"unsub wx-tropl" in the body of your message. For help with WX-TROPL
write to [email-masked] or see http://wxlist.centerone.com. For more
information on tropical weather products, see the NHC Homepage
at http://www.nhc.noaa.gov.