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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.

*************************************************************************

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

*************************************************************************

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

*************************************************************************

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

*************************************************************************
*************************************************************************

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.

*************************************************************************

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               "

*************************************************************************
*************************************************************************

  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.   

*************************************************************************

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.

*************************************************************************

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

*************************************************************************

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.

*************************************************************************

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.

*************************************************************************

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.

*************************************************************************
*************************************************************************

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

*************************************************************************

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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Document: trak9912.htm
Updated: 4th January 2007

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