[Index]
Monthly Global Tropical Cyclone Tracks April 1998
[Summaries and Track Data] [Prepared by Gary Padgett]
| Tropical
Cyclones
[Index] |
Monthly Global Tropical Cyclone Tracks April 1998 [Summaries and Track Data] [Prepared by Gary Padgett] |
GLOBAL TROPICAL CYCLONE TRACKS - APRIL 1998
SOUTH INDIAN OCEAN (SIO) - South Indian Ocean West of Longitude 90E
NOTE: The tracking and intensity information for South Indian Ocean
Basin tropical cyclones is based upon operational warnings from
the Joint Typhoon Warning Center of the U.S. Air Force and Navy
on the island of Guam. The MSW are based on a 1-min averaging
period, which is used by all U.S. civilian and military weather
services for tropical cyclone warnings.
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Storm Name: GEMMA Cyclone Number: 32-S Basin: SIO
Date Time Lat Lon Cen Pres MSW Remarks
(GMT) (mb) (kts)
-------------------------------------------------------------------------
98 APR 07 0000 14.1 S 71.4 E 30
98 APR 07 1200 13.8 S 72.0 E 30
98 APR 08 0000 13.8 S 72.2 E 45
98 APR 08 1200 14.5 S 71.4 E 50
98 APR 09 0000 13.8 S 70.0 E 55
98 APR 09 0600 14.9 S 71.4 E 55
98 APR 09 1200 15.0 S 71.8 E 60
98 APR 10 0000 15.6 S 72.4 E 60
98 APR 10 1200 16.3 S 74.1 E 65
98 APR 11 0000 16.3 S 75.7 E 70
98 APR 11 0600 15.7 S 75.9 E 65
98 APR 11 1200 15.4 S 76.6 E 65
98 APR 12 0000 15.1 S 77.0 E 65
98 APR 12 1200 14.7 S 78.0 E 55
98 APR 13 0000 14.9 S 78.1 E 45
98 APR 13 1200 14.6 S 77.7 E 45
98 APR 14 0000 14.6 S 77.9 E 35
98 APR 14 1200 14.2 S 76.5 E 35
98 APR 15 0000 14.2 S 75.4 E 30
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Storm Name: 33S Cyclone Number: 33-S Basin: SIO
Date Time Lat Lon Cen Pres MSW Remarks
(GMT) (mb) (kts)
-------------------------------------------------------------------------
98 APR 07 0000 16.8 S 75.8 E 30
98 APR 07 1200 15.4 S 73.7 E 30
NOTE: This system merged with the developing TC-32S, which was later
named Gemma by the Mauritius Meteorological Service. For JTWC warning
purposes the cyclone was numbered TC-32S following the merger.
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Storm Name: 34S Cyclone Number: 34-S Basin: SIO
Date Time Lat Lon Cen Pres MSW Remarks
(GMT) (mb) (kts)
-------------------------------------------------------------------------
98 APR 19 0000 10.2 S 74.9 E 40
98 APR 19 0600 10.5 S 74.2 E 40
98 APR 19 1200 10.6 S 73.6 E 40
98 APR 19 1800 10.8 S 72.7 E 40
98 APR 20 0000 11.6 S 71.5 E 40
98 APR 20 1200 11.7 S 68.4 E 35
98 APR 21 0000 12.3 S 66.0 E 35
98 APR 21 1200 12.0 S 65.0 E 35
98 APR 22 0000 11.8 S 62.4 E 35
98 APR 22 1200 12.4 S 59.6 E 30
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AUSTRALIAN REGION (AUS) - From Longitude 90E Eastward to Longitude 160E
NOTE: The track presented below is based on operational warnings
issued by the Joint Typhoon Warning Center on the island of
Guam. The MWS is based on a 1-min averaging period. To
convert these to equivalent 10-min average winds, multiply
by 0.87.
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Storm Name: 35S Cyclone Number: 35-S Basin: AUS
Date Time Lat Lon Cen Pres MSW Remarks
(GMT) (mb) (kts)
-------------------------------------------------------------------------
98 APR 19 0000 14.1 S 125.7 E 1002 35
98 APR 19 1200 15.0 S 125.1 E 1004 30 Darwin - 15.0S, 126.0E
NOTE: The central pressures given above are taken from bulletins issued
by the Darwin TCWC.
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SOUTHWEST PACIFIC (SWP) - South Pacific Ocean East of Longitude 160E
NOTE: The tracking and intensity information on Southwest Pacific
Basin tropical cyclones is taken from real-time operational
warnings issued by the Nadi TCWC, Fiji. The MSW are based
on a 10-min averaging period. To convert these to equivalent
1-min average winds, multiply by 1.15. However, the wind
speed estimates by JTWC or NPMOC, mentioned in the Remarks
column, are 1-min average sustained winds. To convert
these to equivalent 10-min average winds, multiply by 0.87.
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Storm Name: ZUMAN Cyclone Number: 31-P Basin: SWP
Date Time Lat Lon Cen Pres MSW Remarks
(GMT) (mb) (kts)
-------------------------------------------------------------------------
98 MAR 29 2100 13.7 S 171.0 E 998 25
98 MAR 30 0000 14.0 S 170.9 E 998 25
98 MAR 30 0600 13.9 S 170.3 E 996 30
98 MAR 30 1200 13.9 S 169.8 E 990 40
98 MAR 30 1800 13.9 S 169.2 E 987 45
98 MAR 31 0000 14.0 S 168.7 E 980 55
98 MAR 31 0600 14.0 S 168.1 E 975 60
98 MAR 31 1200 14.4 S 167.6 E 970 65
98 MAR 31 1800 14.9 S 167.1 E 960 75
98 APR 01 0000 15.3 S 166.5 E 955 80
98 APR 01 0600 15.6 S 166.0 E 955 80
98 APR 01 1200 15.5 S 165.5 E 955 80 JTWC: 75 kts
98 APR 01 1800 15.7 S 165.2 E 955 80
98 APR 02 0000 15.8 S 164.7 E 955 80 JTWC: 15.7S, 164.2E
98 APR 02 0600 15.9 S 164.2 E 955 80
98 APR 02 1200 15.9 S 163.5 E 955 80
98 APR 02 1800 16.0 S 163.0 E 955 80
98 APR 03 0000 15.5 S 162.8 E 955 80 JTWC: 15.4S, 161.9E
98 APR 03 0600 15.6 S 162.3 E 965 70
98 APR 03 1200 15.8 S 161.8 E 965 70
98 APR 03 1800 16.0 S 161.3 E 975 60
98 APR 04 0000 16.6 S 161.4 E 980 55
98 APR 04 0600 16.9 S 161.1 E 985 50
98 APR 04 1200 17.5 S 162.5 E 987 50
98 APR 04 1800 19.0 S 163.6 E 985 50
98 APR 05 0000 19.5 S 164.0 E 985 50
98 APR 05 0600 20.1 S 164.9 E 987 45
98 APR 05 1200 20.6 S 166.2 E 987 45
98 APR 05 1800 22.0 S 168.0 E 990 40
98 APR 06 0000 24.0 S 169.0 E 30
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Storm Name: ALAN Cyclone Number: 36-P Basin: SWP
Date Time Lat Lon Cen Pres MSW Remarks
(GMT) (mb) (kts)
-------------------------------------------------------------------------
98 APR 19 0600 14.6 S 158.0 W 1000 25
98 APR 19 1200 14.5 S 158.5 W 999 25
98 APR 19 1800 14.2 S 158.6 W 997 30
98 APR 20 0000 13.8 S 158.3 W 997 30
98 APR 20 0600 14.0 S 158.0 W 997 30
98 APR 20 1200 13.5 S 159.0 W 997 30
98 APR 20 1800 12.7 S 158.9 W 997 35 See Note
98 APR 21 0000 11.7 S 159.4 W 995 35
98 APR 21 0600 11.5 S 158.5 W 995 35
98 APR 21 1200 11.6 S 158.3 W 995 35
98 APR 21 1800 11.0 S 158.0 W 995 35
98 APR 22 0000 11.0 S 158.5 W 995 35
98 APR 22 0600 11.1 S 158.5 W 995 35
98 APR 22 1200 10.5 S 159.0 W 995 35
98 APR 22 1800 10.7 S 159.3 W 995 35
98 APR 23 0000 11.1 S 159.5 W 35 Interpolated position
98 APR 23 0600 11.5 S 159.6 W 35 NPMOC Warning
98 APR 23 1200 12.3 S 158.0 W 998 35 (southern semicircle)
98 APR 23 1800 11.6 S 159.2 W 35 NPMOC Warning
98 APR 24 1200 14.0 S 155.0 W 35 " "
98 APR 24 2100 15.4 S 154.2 W 40
98 APR 25 0000 15.5 S 153.5 W 40
98 APR 25 0600 16.8 S 153.0 W 992 40
98 APR 25 1200 17.6 S 151.6 W 992 40
98 APR 25 1800 15.5 S 152.5 W 998 33
98 APR 26 0000 16.3 S 152.1 W 1000 25 NPMOC: 35 kts
98 APR 26 1800 17.0 S 151.0 W 1004 20
NOTE: The gale force winds indicated from 20/1800Z until 21/1200Z
were forecast to be occurring in the southern or southwestern quadrant
only. The definition of a tropical cyclone adherred to in WMO Region V
requires that gales completely surround the center before the system
is classified as a tropical cyclone and assigned a name.
This system was accidentally numbered as TC-32P in the first warning
issued by NPMOC. In order to avoid confusion this number was retained
in subsequent warnings. However, it will officially be known as TC-36P.
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Storm Name: BART Cyclone Number: 37-P Basin: SWP
Date Time Lat Lon Cen Pres MSW Remarks
(GMT) (mb) (kts)
-------------------------------------------------------------------------
98 APR 28 2200 15.0 S 144.0 W 1006 25
98 APR 29 1200 16.0 S 140.0 W 1000 30
98 APR 29 1800 17.5 S 139.5 W 995 35
98 APR 30 0000 17.8 S 138.0 W 988 45
98 APR 30 0600 18.7 S 138.0 W 988 45
98 APR 30 1200 19.2 S 137.8 W 988 45
98 APR 30 1800 19.4 S 137.2 W 988 45
98 MAY 01 0000 19.7 S 136.0 W 990 40
98 MAY 01 0600 20.0 S 135.2 W 995 35 (southern semi-circle)
98 MAY 01 1200 20.5 S 134.8 W 998 35 ( " " )
98 MAY 01 1800 21.0 S 134.0 W 1000 30
98 MAY 02 1800 22.0 S 131.0 W 35 (southern quadrant)
98 MAY 03 0000 24.0 S 130.0 W 35 ( " " )
NOTE: The gale force winds indicated after 0000 UTC on 01 May were
forecast to be occurring in the southern quadrant or semi-circle
only.
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