[Index]
Monthly Global Tropical Cyclone Tracks December 1999
[Summaries and Track Data] [Prepared by Gary Padgett]
| Tropical
Cyclones
[Index] |
Monthly Global Tropical Cyclone Tracks December 1999 [Summaries and Track Data] [Prepared by Gary Padgett] |
GLOBAL TROPICAL CYCLONE TRACKS - DECEMBER 1999
NORTHWEST PACIFIC (NWP) - North Pacific Ocean West of Longitude 180
NOTE: The tracking information for Northwest Pacific Basin tropical
cyclones is based primarily upon operational warnings from the
Joint Typhoon Warning Center of the U.S. Air Force and Navy at
Pearl Harbor, Hawaii. Comparisons were made with track coordinates
given in advisories from the meteorological services of Japan
(JMA) and the Philippines (PAGASA). In general, whenever the
center position differed by more than 40-50 nm from JTWC's, an
entry was made in the Remarks column.
The 1-min avg MSW were taken from the JTWC advisories while the
10-min avg MSW were obtained from PAGASA's advisories if the
storm was in PAGASA's area of responsibility; otherwise, they
were gleaned from JMA's advisories or high seas forecasts. In
a few cases the 10-min MSW given by PAGASA and JMA did not agree;
in those cases I reported the higher value. The estimates of
central pressure were obtained from JMA's advisories.
To the author's knowledge, neither JMA nor PAGASA issued any
warnings or bulletins for the three depressions tracked by JTWC
during December. The tracks and 1-min MSW estimates are based
solely upon JTWC's warnings.
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Storm Name: Tropical Depression Cyclone Number: 31W Basin: NWP
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
99 DEC 01 0000 11.1 N 111.4 E 30
99 DEC 01 0600 10.9 N 110.8 E 30
99 DEC 01 1200 10.7 N 110.2 E 30
99 DEC 01 1800 10.6 N 109.8 E 30
99 DEC 02 0000 10.3 N 109.2 E 25
99 DEC 02 0600 6.6 N 107.0 E 25
99 DEC 02 1200 6.6 N 106.0 E 25
99 DEC 02 1800 6.6 N 105.5 E 25
99 DEC 03 0000 6.9 N 104.5 E 30
99 DEC 03 0600 7.4 N 103.9 E 30
99 DEC 03 1200 7.8 N 103.0 E 25
99 DEC 03 1800 8.2 N 101.6 E 25
99 DEC 04 0000 8.3 N 100.6 E 20
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Storm Name: Tropical Depression Cyclone Number: 32W Basin: NWP
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
99 DEC 09 1800 7.7 N 111.9 E 25
99 DEC 10 0000 7.7 N 111.4 E 30
99 DEC 10 0600 7.3 N 109.8 E 30
99 DEC 10 1200 7.3 N 108.8 E 30
99 DEC 10 1800 7.3 N 108.5 E 30
99 DEC 11 0000 7.3 N 107.8 E 20
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Storm Name: Tropical Depression Cyclone Number: 33W Basin: NWP
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
99 DEC 14 1200 12.0 N 113.2 E 25
99 DEC 14 1800 12.6 N 112.0 E 30
99 DEC 15 0000 12.7 N 111.0 E 30
99 DEC 15 0600 11.6 N 110.6 E 30
99 DEC 15 1200 11.6 N 110.5 E 30
99 DEC 15 1800 11.7 N 109.8 E 30
99 DEC 16 0000 11.9 N 109.1 E 25
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NORTH INDIAN OCEAN (NIO) - Bay of Bengal and Arabian Sea
NOTE: The tracking and intensity information for North Indian Ocean
Basin tropical cyclones is based upon operational warnings from
the Joint Typhoon Warning Center of the U.S. Air Force and Navy
at Pearl Harbor, Hawaii. 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. Some information was
also obtained from the Indian Meteorological Department (IMD).
JTWC issued no warnings on the depression tracked below, but four
Formation Alerts were issued on successive days for the area of
disturbed weather (8-11 Dec) with the Alert being cancelled on
12 Dec.
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Storm Name: Tropical Depression Cyclone Number: None Basin: NIO
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
99 DEC 08 0600 13.0 N 90.9 E 20 IMD Information
99 DEC 09 0300 10.5 N 85.5 E 25 "
99 DEC 10 0600 11.0 N 85.0 E 25 "
99 DEC 10 2100 9.0 N 85.4 E 20 JTWC Information
99 DEC 11 2100 9.0 N 84.4 E 20 "
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SOUTH INDIAN OCEAN (SIO) - South Indian Ocean West of Longitude 90E
NOTE: The tracking coordinates, 10-min avg MSW, and estimates of
central pressure were obtained from the RSMC La Reunion's
advisories, while the 1-min avg MSW were taken from JTWC's
warnings.
A very special thanks is due Patrick Hoareau of Rennes, France,
(and a former resident of La Reunion) for preparing the track
for Tropical Cyclone Astride. Patrick is a dedicated enthusiast
and student of tropical cyclones and quite a knowledgeable chap
about many aspects of the storms.
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Storm Name: ASTRIDE Cyclone Number: 03S Basin: SIO
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
99 DEC 24 0230 09.5 S 75.2 E 1004 25 JTWC Formation Alert
99 DEC 24 1200 12.0 S 73.2 E 1002 25 METEO FRANCE Warning
99 DEC 24 1800 13.0 S 71.6 E 1002 25
99 DEC 25 0000 12.9 S 70.6 E 1000 30 25
99 DEC 25 0600 12.1 S 69.9 E 1000 25
99 DEC 25 1200 12.3 S 68.8 E 1000 45 25
99 DEC 25 1800 12.4 S 68.0 E 997 30
99 DEC 26 0000 12.6 S 66.8 E 992 50 40
99 DEC 26 0600 12.6 S 65.8 E 990 45
99 DEC 26 1200 13.0 S 64.7 E 990 55 45
99 DEC 26 1800 14.6 S 64.4 E 987 45
99 DEC 27 0000 14.6 S 63.4 E 985 55 50
99 DEC 27 0600 14.3 S 62.1 E 985 50
99 DEC 27 1200 14.6 S 61.5 E 985 65 50
99 DEC 27 1800 14.7 S 61.3 E 988 45
99 DEC 28 0000 14.3 S 59.5 E 992 65 40 JTWC: 15.0 S, 59.6 E
99 DEC 28 0600 14.8 S 58.2 E 992 40
99 DEC 28 1200 15.2 S 57.7 E 992 55 40
99 DEC 28 1800 15.4 S 57.2 E 992 40
99 DEC 29 0000 15.6 S 56.7 E 992 55 40 JTWC: 15.4 S, 57.4 E
99 DEC 29 0600 15.6 S 56.4 E 992 40
99 DEC 29 1200 15.9 S 55.9 E 992 55 40 JTWC: 15.5 S, 55.3 E
99 DEC 29 1800 15.8 S 55.3 E 992 40
99 DEC 30 0000 16.0 S 55.2 E 994 45 40 JTWC: 15.3 S, 54.7 E
99 DEC 30 0600 15.3 S 54.2 E 985 50 See Note #1
99 DEC 30 1200 14.8 S 53.2 E 985 45 50
99 DEC 30 1800 14.8 S 52.0 E 988 45
99 DEC 31 0000 14.7 S 51.7 E 988 40 45 JTWC: 14.1 S, 51.7 E
99 DEC 31 0600 12.7 S 51.2 E 995 40
99 DEC 31 1200 12.8 S 50.6 E 995 40 40 JTWC: 13.4 S, 50.7 E
99 DEC 31 1800 12.6 S 49.9 E 995 35
00 JAN 01 0000 12.4 S 49.0 E 997 40 30 Over land (Madagascar)
00 JAN 01 0600 12.4 S 48.6 E 997 30 Back over water
00 JAN 01 1200 12.7 S 46.6 E 997 35 30 Final Warning by JTWC
00 JAN 01 1800 12.4 S 46.5 E 998 30
00 JAN 02 0000 12.6 S 45.9 E 1000 25
00 JAN 02 0600 13.1 S 45.0 E 1000 25
00 JAN 02 1200 13.6 S 43.8 E 997 30
00 JAN 02 1800 13.7 S 42.3 E 997 30
00 JAN 03 0000 13.6 S 40.9 E 997 30
00 JAN 03 0600 13.5 S 40.2 E 1001 25 Inland - See Note #2
Note #1: Astride's center passed within about 35 nm of Tromelin Island
where observed winds confirmed that the tropical storm was significantly
stronger than the previous warning suggested.
Note #2: The center was inland over Mozambique and weakening but near-
gales to 30 kts were still possible over the southeastern quadrant.
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AUSTRALIAN REGION (AUS) - From Longitude 90E Eastward to Longitude 160E
NOTE: The tracking information presented below was obtained from
operational warnings issued by the Tropical Cyclone Warning
Centres at Perth, Western Australia; Darwin, Northern Territory;
and Brisbane, Queensland. JTWC warnings were utilized for
making comparisons and for supplying information for times when
the Australian warnings were unavailable. The 10-min MSW values
were obtained from the Australian warnings while the 1-min MSW
values were assigned by JTWC.
The tropical cyclone warnings from Perth report the analyzed
cyclone positions at 0400, 1000, 1600, and 2200 UTC instead of
the more familiar 0000, 0600, 1200, and 1800 UTC utilized by most
TC warning agencies.
A very special thanks is due Matthew Saxby of Queanbeyan, New
South Wales, Australia, for sending me tabulated tracks of the
Australian centres' tracking information. Matthew is also a very
knowledgeable and dedicated tropical cyclone enthusiast.
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Storm Name: Tropical LOW Cyclone Number: None Basin: AUS
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
99 DEC 02 0600 12.6 S 145.6 E 1002 33
99 DEC 02 1200 12.6 S 145.8 E 1002 33
99 DEC 02 1800 13.0 S 146.5 E 1002 33
99 DEC 03 0000 13.5 S 148.0 E 1002 35
99 DEC 03 0600 13.0 S 148.0 E 1002 33
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Storm Name: ILSA Cyclone Number: 01S Basin: AUS
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
99 DEC 10 0400 9.0 S 96.0 E 1002 25 See Note
99 DEC 10 0700 9.5 S 98.2 E 998 30
99 DEC 10 1600 9.8 S 99.5 E 998 30 30
99 DEC 10 2200 9.8 S 100.5 E 998 30
99 DEC 11 0400 10.8 S 100.6 E 996 35 45
99 DEC 11 1000 11.2 S 101.2 E 994 45
99 DEC 11 1600 11.3 S 101.5 E 992 40 45
99 DEC 11 2200 11.9 S 101.8 E 990 45
99 DEC 12 0400 12.0 S 102.4 E 985 45 55
99 DEC 12 1000 12.3 S 103.0 E 985 55
99 DEC 12 1600 12.6 S 103.5 E 990 45 55
99 DEC 12 2200 12.6 S 104.3 E 990 45
99 DEC 13 0400 12.5 S 105.0 E 985 55 50
99 DEC 13 1000 12.3 S 105.3 E 990 50
99 DEC 13 1600 12.3 S 106.3 E 990 50 45
99 DEC 13 2200 12.2 S 107.0 E 990 45
99 DEC 14 0400 12.5 S 108.5 E 990 55 45
99 DEC 14 1000 12.3 S 109.0 E 990 45
99 DEC 14 1600 12.3 S 109.8 E 990 55 45
99 DEC 14 2200 12.3 S 111.1 E 990 45
99 DEC 15 0400 12.3 S 112.5 E 990 60 45
99 DEC 15 1000 13.2 S 113.3 E 990 45
99 DEC 15 1600 13.7 S 114.2 E 985 60 50
99 DEC 15 2200 14.3 S 115.2 E 985 60 50
99 DEC 16 0400 15.6 S 115.9 E 990 50 45 JTWC-06Z: 16.1S, 117.3E
99 DEC 16 1000 16.9 S 117.9 E 990 45 45 JTWC-12Z: 17.3S, 118.6E
99 DEC 16 1600 18.2 S 118.9 E 990 55 45
99 DEC 16 2200 19.3 S 120.0 E 995 50 40
99 DEC 17 0400 19.5 S 121.0 E 998 35 40
99 DEC 17 1200 20.5 S 121.5 E 25 JTWC Warning
Note: The 10-min MSW values given prior to 11/0400 UTC are subjective
estimates based upon the attendant central pressures given in the Perth
warnings.
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Storm Name: JOHN Cyclone Number: 02S Basin: AUS
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
99 DEC 09 0400 11.0 S 121.0 E 1004 20 See Note
99 DEC 10 0400 10.5 S 121.5 E 1004 20
99 DEC 11 0500 13.5 S 120.0 E 1001 25
99 DEC 11 1600 13.7 S 119.5 E 997 35 30
99 DEC 11 2200 13.9 S 118.6 E 992 45
99 DEC 12 0300 14.3 S 119.3 E 985 50 50
99 DEC 12 1000 14.8 S 119.3 E 980 50
99 DEC 12 1600 15.3 S 119.2 E 965 65 70
99 DEC 12 2200 15.9 S 119.0 E 965 70 70
99 DEC 13 0400 16.6 S 118.5 E 965 75 70
99 DEC 13 1000 16.9 S 118.4 E 960 90 80
99 DEC 13 1600 17.5 S 118.1 E 955 110 90
99 DEC 13 2200 18.0 S 117.9 E 940 115 90
99 DEC 14 0400 18.6 S 117.5 E 925 120 100
99 DEC 14 1000 19.3 S 117.3 E 915 130 110
99 DEC 14 1600 19.8 S 117.3 E 915 130 110
99 DEC 14 2200 20.4 S 117.5 E 915 130 110
99 DEC 15 0400 21.2 S 117.8 E 940 115 90
99 DEC 15 1000 22.0 S 118.4 E 970 80 70
99 DEC 15 1600 22.5 S 119.0 E 980 50
99 DEC 15 2200 22.8 S 119.6 E 990 40
99 DEC 16 0100 23.0 S 120.5 E 995 25
Note: The 10-min MSW values given prior to 11/2200 UTC are subjective
estimates based upon the attendant central pressures given in the Perth
warnings.
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Storm Name: Hybrid LOW Cyclone Number: None Basin: AUS
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
99 DEC 26 2000 22.0 S 143.0 E 1001 Inland (See Note)
99 DEC 27 0600 23.0 S 151.0 E 1000 40
99 DEC 27 1200 23.5 S 152.5 E 998 40
99 DEC 27 1800 24.3 S 154.4 E 992 45
99 DEC 28 0000 25.1 S 155.4 E 992 45
99 DEC 28 0600 25.5 S 156.7 E 992 45
99 DEC 28 1200 25.5 S 158.0 E 992 40
99 DEC 28 1800 26.0 S 160.0 E 992 40
99 DEC 29 0000 26.0 S 161.0 E 995 40
99 DEC 29 0600 28.0 S 163.0 E 992 Extratropical
99 DEC 29 1100 29.0 S 162.0 E 994 35 Wellington Warning
Note: The 27/0000 UTC warning from Brisbane did not specify any
coordinates, but indicated that the LOW was centered inland near Mackay.
The estimated CP and MSW at the time were 1002 mb and 45 kts,
respectively.
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SOUTHWEST PACIFIC (SWP) - South Pacific Ocean East of Longitude 160E
NOTE: The tracking and intensity information for Southwest Pacific
Basin tropical cyclones was taken from real-time operational
warnings issued by the Nadi TCWC, Fiji for positions north of
25S and from the Wellington, New Zealand office for positions
south of 25S. Warnings from JTWC (west of 180) and from
NPMOC (east of 180) were utilized for the purpose of making
comparisons and for supplying information for times when the
Nadi or Wellington warnings were unavailable. The 10-min avg
MSW values were taken from the Fiji or New Zealand warnings
while the 1-min avg MSW values were obtained from the JTWC or
NPMOC warnings. (NOTE: JTWC did not issue any warnings on the
depressions listed below.)
*************************************************************************
Storm Name: Tropical Depression Cyclone Number: 03F Basin: SWP
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
99 DEC 01 2100 15.5 S 169.0 E 1009 25
99 DEC 02 0600 16.0 S 168.0 E 1006 30
99 DEC 02 2100 16.5 S 169.0 E 1006 30
99 DEC 03 0600 16.5 S 168.0 E 1006 30
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Storm Name: Tropical Depression Cyclone Number: 04F Basin: SWP
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
99 DEC 05 0600 21.0 S 166.0 E 1004 30
99 DEC 05 2100 21.0 S 172.0 E 1004 30 See Note
99 DEC 06 0000 21.0 S 170.0 E 1004 35 See Note
99 DEC 06 0600 21.0 S 170.5 E 1004 35
99 DEC 06 1200 22.0 S 173.0 E 1004 35
99 DEC 06 1800 22.0 S 175.0 E 1003 35
99 DEC 06 2100 22.0 S 176.5 E 1003 35
99 DEC 07 0000 23.0 S 178.0 E 1003 35
99 DEC 07 2100 21.0 S 174.0 W 1005 30
Note: MSW at 05/2100 UTC based on a surface report of 30-kt southeast
winds at Matthew Island (91598). Gale-force winds from 06/0000 UTC
onward were occurring in the southern quadrant only.
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