Tropical Cyclones
[Index]
Main Index Home Page Stock Weather Photos Australian Severe Weather Forum Storm News and Storm Chasing Reports Tropical Cyclones / Hurricanes / Typhoons Weather Data and Links Wild Fires / Bushfires Weather Observation Techniques Weather Picture Catalogue Tornado Pictures and Reports Stock Video Footage and DVDs for sale
Monthly Global Tropical Cyclone Tracks April 1999
[Summaries and Track Data] [Prepared by Gary Padgett]

               GLOBAL TROPICAL CYCLONE TRACKS - APRIL 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 on
       the island of Guam.  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.


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


Storm Name: JACOB (KARING)        Cyclone Number: 03W     Basin: NWP


   Date   Time   Lat      Lon    Cent  MSW   MSW        Remarks
          (GMT)                 Press 1-min 10-min
                                 (mb) (kts) (kts)
-------------------------------------------------------------------------


99 APR 03 0600   5.0 N  141.0 E  1008   15        JTWC Trop. WX Outlook
99 APR 04 0600   8.0 N  140.0 E  1008   15                  "
99 APR 05 0600  11.0 N  137.0 E  1008   15                  "
99 APR 06 0000  10.2 N  134.7 E  1007   20        JTWC Formation Alert
99 APR 06 0600  10.7 N  133.2 E         25
99 APR 06 1200  11.1 N  133.0 E         25
99 APR 06 1800  11.6 N  132.7 E         25
99 APR 07 0000  13.0 N  133.3 E         25
99 APR 07 0600  13.2 N  132.7 E         30
99 APR 07 1200  13.3 N  132.5 E         25
99 APR 07 1800  13.1 N  132.4 E         30
99 APR 08 0000  13.1 N  132.0 E         30    30  
99 APR 08 0600  12.2 N  131.1 E         30    30  PAGASA: 13.1 N, 131.5 E
99 APR 08 1200  12.4 N  130.0 E         30    30  PAGASA: 12.8 N, 130.7 E
99 APR 08 1800  12.5 N  128.6 E         35    30  PAGASA: 12.5 N, 129.5 E
99 APR 09 0000  13.1 N  126.4 E         30    30
99 APR 09 0600  13.1 N  125.4 E         30    30
99 APR 09 1200  13.2 N  124.8 E               30  PAGASA Warning (final)
99 APR 09 1800  13.1 N  124.0 E         25
99 APR 10 0000  13.5 N  123.5 E         20


Note:  There are no central pressure estimates for this system due to
the unavailability of JMA bulletins to the author.


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


Storm Name: KATE (9901/DIDING)    Cyclone Number: 04W     Basin: NWP


   Date   Time   Lat      Lon    Cent  MSW   MSW        Remarks
          (GMT)                 Press 1-min 10-min
                                 (mb) (kts) (kts)
-------------------------------------------------------------------------
99 APR 12 0600   6.0 N  131.0 E  1008   20        JTWC Trop. WX Outlook
99 APR 13 0600   6.0 N  128.5 E  1008   15                  "
99 APR 13 2100   5.0 N  128.0 E  1004   20                  "
99 APR 14 0600   5.0 N  127.0 E  1008   20                  "
99 APR 15 0600   4.0 N  124.0 E  1008   30                  "
99 APR 16 0600   4.0 N  123.0 E  1008   15                  "
99 APR 17 0600   5.8 N  127.2 E  1008   15                  "
99 APR 18 0600   5.1 N  126.0 E  1007   15                  "
99 APR 19 0600   5.0 N  128.5 E  1007   15                  "
99 APR 21 0900   8.0 N  125.6 E  1002   20        JTWC Formation Alert
99 APR 22 0000   9.7 N  125.7 E         25    30  PAGASA: 10.0 N, 127.2 E
99 APR 22 0600  11.4 N  125.8 E         30    30  PAGASA: 11.4 N, 127.0 E
99 APR 22 1200  12.4 N  125.7 E         30    35  PAGASA: 12.1 N, 126.7 E
99 APR 22 1800  13.1 N  126.1 E         30    35
99 APR 23 0000  14.0 N  126.9 E         35    35  PAGASA: 14.0 N, 126.0 E
99 APR 23 0600  13.8 N  126.8 E         35    35  PAGASA: 14.6 N, 126.2 E
99 APR 23 1200  14.1 N  127.3 E   998   40    35  PAGASA: 14.8 N, 126.4 E
99 APR 23 1800  14.4 N  128.0 E   996   45    40  PAGASA: 15.0 N, 127.5 E
99 APR 24 0000  14.7 N  128.7 E   992   50    40
99 APR 24 0600  15.1 N  129.4 E   992   50    40
99 APR 24 1200  15.6 N  129.7 E   992   50    40
99 APR 24 1800  16.2 N  130.3 E   992   55    40
99 APR 25 0000  16.8 N  130.7 E   990   60    45  PAGASA: 16.2 N, 131.0 E
99 APR 25 0600  17.6 N  131.5 E   985   60    50  PAGASA: 17.0 N, 131.2 E
99 APR 25 1200  18.8 N  131.9 E   985   60    50
99 APR 25 1800  19.3 N  132.4 E   980   60    55
99 APR 26 0000  20.0 N  133.2 E   980   60    55
99 APR 26 0600  20.6 N  133.8 E   980   55    55
99 APR 26 1200  21.0 N  135.0 E   985   50    50
99 APR 26 1800  22.2 N  136.4 E   985   50    50
99 APR 27 0000  23.3 N  138.0 E   985   60    50
99 APR 27 0600  24.0 N  140.0 E   985   75    50
99 APR 27 1200  25.0 N  142.0 E   980   70    50
99 APR 27 1800  26.2 N  143.2 E   980   65    50
99 APR 28 0000  27.4 N  145.5 E   985   60    45  JMA: 27.1 N, 144.9 E
99 APR 28 0600  28.3 N  147.4 E   985   55    45
99 APR 28 1200  29.3 N  149.3 E   990   50    40  Extratropical


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


Storm Name: LEO (9902)            Cyclone Number: 05W     Basin: NWP


   Date   Time   Lat      Lon    Cent  MSW   MSW        Remarks
          (GMT)                 Press 1-min 10-min
                                 (mb) (kts) (kts)
-------------------------------------------------------------------------


99 APR 25 1300  13.3 N  112.6 E  1001   20        JTWC Trop. WX Outlook
99 APR 26 1000  14.0 N  113.0 E         20        JTWC Formation Alert
99 APR 27 0000  14.3 N  114.4 E         20
99 APR 27 0600  14.6 N  114.0 E         25
99 APR 27 1200  14.7 N  114.0 E         25
99 APR 27 1800  16.2 N  112.2 E         25
99 APR 28 0000  16.3 N  111.5 E         30
99 APR 28 0600  15.3 N  110.1 E   996   35    35  JMA: 15.5 N, 111.0 E
99 APR 28 1200  15.2 N  109.8 E   996   35    35  JMA: 15.6 N, 110.4 E
99 APR 28 1800  15.6 N  111.2 E   994   35    35
99 APR 29 0000  16.4 N  112.5 E   990   35    45
99 APR 29 0600  17.4 N  113.3 E   990   45    45
99 APR 29 1200  17.9 N  113.6 E   985   55    50
99 APR 29 1800  18.3 N  114.2 E   975   65    60
99 APR 30 0000  18.5 N  114.5 E   965   80    70
99 APR 30 0600  19.0 N  114.8 E   960  100    75
99 APR 30 1200  19.5 N  115.1 E   960  100    75
99 APR 30 1800  20.0 N  115.5 E   960  110    75
99 MAY 01 0000  20.5 N  115.7 E   965   90    70
99 MAY 01 0600  20.7 N  115.6 E   970   85    65
99 MAY 01 1200  21.0 N  115.6 E   970   70    65
99 MAY 01 1800  21.5 N  115.6 E   975   65    60
99 MAY 02 0000  21.6 N  114.8 E   985   50    50
99 MAY 02 0600  21.9 N  114.7 E   992   50    45
99 MAY 02 1200  22.3 N  114.7 E         30
99 MAY 02 1800  22.7 N  114.7 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
       Best Track file, forwarded to me by Philippe Caroff.  (A
       special thanks to Philippe for sending it to me.)  One-min
       avg MSW and some positions for comparison purposes were taken
       from JTWC's operational warnings.


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.   I have made no attempt to interpolate the
       coordinates to standard synoptic hours as I did last season.


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


Storm Name: FREDERIC/EVRINA       Cyclone Number: 31S     Basin: AUS/SIO


   Date   Time   Lat      Lon    Cent  MSW   MSW        Remarks
          (GMT)                 Press 1-min 10-min
                                 (mb) (kts) (kts)
-------------------------------------------------------------------------


99 MAR 21 0400   8.0 S  134.0 E  1006             Darwin Trop. WX Outlook
99 MAR 22 0400   9.0 S  136.0 E  1008                         "
99 MAR 23 0400   8.0 S  130.0 E  1008                         "
99 MAR 24 0400  11.0 S  126.0 E  1005             Perth Trop. WX Outlook
99 MAR 25 0400  13.0 S  123.0 E  1005                        "
99 MAR 25 0800  13.0 S  122.5 E  1007   20        JTWC Trop. WX Outlook
99 MAR 25 1800  12.0 S  117.5 E  1007   20                  "
99 MAR 26 0400  12.5 S  116.0 E  1002   25    25  Perth Warning
99 MAR 26 1000  13.1 S  114.5 E  1002   25    25  
99 MAR 26 1600  13.4 S  113.3 E  1000   30    25
99 MAR 26 2200  13.9 S  113.0 E  1000   30    25
99 MAR 27 0400  13.7 S  112.3 E  1000   30    30  Relocated
99 MAR 27 1000  13.9 S  111.2 E   998   30    30
99 MAR 27 1600  14.3 S  109.9 E   998   35    30
99 MAR 27 2200  14.9 S  108.9 E   997   40    45
99 MAR 28 0400  15.0 S  108.0 E   994         45
99 MAR 28 1000  16.0 S  107.0 E   995   45    45
99 MAR 28 1600  15.8 S  106.4 E   988         55
99 MAR 28 2200  16.0 S  105.3 E   980   65    55
99 MAR 29 0400  15.8 S  103.4 E   975         60
99 MAR 29 1000  16.0 S  102.3 E   970   80    60
99 MAR 29 1600  16.7 S  100.7 E   955         75
99 MAR 29 2200  16.8 S   99.5 E   950  115    80
99 MAR 30 0400  17.0 S   98.0 E   940         90
99 MAR 30 1000  17.2 S   96.6 E   920  115   110
99 MAR 30 1600  17.1 S   95.4 E   920        110
99 MAR 30 2200  17.2 S   94.0 E   920  125   110
99 MAR 31 0400  17.4 S   93.0 E   920        110
99 MAR 31 1000  17.6 S   91.9 E   920  140   110
99 MAR 31 1600  17.5 S   91.4 E   915        110
99 MAR 31 2200  17.5 S   90.7 E   915  155   110  See Note #1
99 APR 01 0400  17.6 S   90.0 E   925        110
99 APR 01 1200  17.8 S   89.4 E   925  125    95  JTWC: 17.9 S, 88.7 E
99 APR 01 1800  17.8 S   88.7 E   940         85  See Note #2
99 APR 02 0000  17.9 S   87.9 E   955  100    70  JTWC: 18.6 S, 87.2 E
99 APR 02 0600  17.9 S   86.6 E   972         55
99 APR 02 1200  18.1 S   85.3 E   975   65    53
99 APR 02 1800  18.1 S   84.0 E   975         53
99 APR 03 0000  18.0 S   82.9 E   978   65    50
99 APR 03 0600  18.0 S   81.9 E   978         50
99 APR 03 1200  18.0 S   80.6 E   978   60    50
99 APR 03 1800  18.1 S   79.2 E   980         48
99 APR 04 0000  18.3 S   77.7 E   983   55    45
99 APR 04 0600  18.4 S   76.4 E   987         40
99 APR 04 1200  18.7 S   74.7 E   990   50    37
99 APR 04 1800  18.8 S   73.5 E   992         35
99 APR 05 0000  19.0 S   72.2 E   992   55    35
99 APR 05 0600  19.0 S   71.1 E   995         30
99 APR 05 1200  18.8 S   69.8 E   995   45    30
99 APR 05 1800  18.7 S   68.9 E   997         30
99 APR 06 0000  18.8 S   67.8 E   997   40    30
99 APR 06 0600  18.9 S   66.8 E   997         30
99 APR 06 1200  18.7 S   65.9 E   998   35    28
99 APR 06 1800  18.9 S   65.1 E   998         28
99 APR 07 0000  19.4 S   64.3 E  1000   30    25
99 APR 07 0600  20.1 S   63.7 E  1000         25
99 APR 07 1200  20.2 S   62.8 E  1000         25
99 APR 07 1800  20.7 S   62.4 E  1002         25
99 APR 08 0000  21.6 S   62.4 E  1002         25
99 APR 08 0600  22.1 S   62.6 E  1002         25
99 APR 08 1200  22.3 S   63.8 E  1002         25
99 APR 08 1800  22.3 S   65.2 E  1004         20
99 APR 09 0000  22.3 S   66.9 E  1004         20
99 APR 09 0600  22.6 S   67.3 E  1005         20
99 APR 09 1200  22.3 S   67.7 E  1005         15
99 APR 09 1800  22.2 S   67.6 E  1007         15
99 APR 10 0000  22.1 S   67.4 E  1008         15
99 APR 10 0600  22.2 S   67.0 E  1010         15
99 APR 10 1200  22.3 S   66.5 E  1010         15
99 APR 10 1800  22.0 S   65.8 E  1012         15
                              
Note #1:  According to some private correspondence with Jim Parsons, a
Typhoon Duty Officer at JTWC, this 1-min MSW value has been re-adjusted
back to T7.0/140 kts.   Tropical Cyclone Frederic crossed into the
South Indian Ocean basin shortly after 0400 UTC on 1 April and was
renamed Evrina by Mauritius.  The portion of the above track west of
90E is taken from the analyzed Best Track prepared by the La Reunion
TCWC.


Note #2:  The cyclone was definitely beginning to weaken as it crossed
90E, but part of the drop in MSW from 110 kts to 95 kts may well be
due to different 1-min MSW to 10-min MSW conversion rules between the
Perth and La Reunion TCWCs.  The Dvorak satellite intensity scale as
calibrated by U. S. military reconnaissance flights into storms in the
Atlantic and (previously) Northwest Pacific basins represents an
estimated 1-min MSW.  The Australian TCWCs utilize a conversion factor
of 0.88 or 0.9 to modify the scale to 10-min avg MSW, but La Reunion 
uses a slightly lower conversion factor of 0.8 to modify the Dvorak
scale.


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


Storm Name: GWENDA                Cyclone Number: 32S     Basin: AUS


   Date   Time   Lat      Lon    Cent  MSW   MSW        Remarks
          (GMT)                 Press 1-min 10-min
                                 (mb) (kts) (kts)
-------------------------------------------------------------------------


99 APR 01 0600  10.0 S  135.0 E  1007   20        JTWC Trop. WX Outlook
99 APR 01 1800  10.0 S  132.0 E  1006   20                  "
99 APR 02 1800   9.0 S  131.0 E  1006   20                  "
99 APR 03 1800  11.0 S  129.0 E  1007   15                  "
99 APR 03 2300  11.5 S  126.4 E  1000         30  Darwin Warning   
99 APR 04 0600  11.4 S  124.2 E  1000         30     
99 APR 04 1000  11.2 S  123.7 E   999         30  Perth Warning       
99 APR 04 1600  11.2 S  123.0 E   999         30         
99 APR 04 2200  11.7 S  121.8 E   997   30    30  JTWC-00Z: 12.2S, 120.8E
99 APR 05 0400  12.4 S  120.0 E   990         45     
99 APR 05 1000  12.8 S  119.0 E   985   45    50     
99 APR 05 1600  13.3 S  118.3 E   985         50     
99 APR 05 2200  14.3 S  117.4 E   975   65    60     
99 APR 06 0400  15.3 S  117.0 E   930   90   100    
99 APR 06 1000  16.0 S  116.6 E   915  115   110    
99 APR 06 1600  16.4 S  116.6 E   915  125   110    
99 APR 06 2200  17.0 S  116.6 E   915  130   110    
99 APR 07 0400  18.0 S  117.3 E   930  110   100    
99 APR 07 1000  19.2 S  118.0 E   940  100    90     
99 APR 07 1600  20.2 S  118.9 E   980   50    55  JTWC-18Z: 20.7S, 119.6E
99 APR 07 2200  20.4 S  119.2 E   998         30  Inland   
                              
*************************************************************************


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 APR 13 0600   7.0 S  136.0 E  1006   15        JTWC Trop. WX Outlook
99 APR 14 0600   9.0 S  139.0 E  1006   15                  "
99 APR 14 1200   8.5 S  139.5 E  1002   25                  "
99 APR 15 0600   8.5 S  139.5 E  1004   25                  "
99 APR 16 0600   9.5 S  139.0 E  1002   35    30  See Note #1   
99 APR 16 1200  10.0 S  139.5 E  1001         30     
99 APR 16 1800  10.5 S  139.5 E   999         30     
99 APR 17 0000  11.0 S  140.0 E   999         30     
99 APR 17 0600  10.5 S  139.5 E   999         30     
99 APR 17 1200  10.0 S  139.8 E   999         35  See Note #2   
99 APR 17 1800  10.0 S  140.0 E   999         35     
99 APR 18 0000  10.8 S  140.0 E  1000         30     
99 APR 18 0600  11.9 S  140.0 E  1000         30     
99 APR 19 0600  12.0 S  140.5 E  1000         30     
99 APR 20 0600  12.0 S  140.5 E  1005   20        JTWC Trop. WX Outlook
99 APR 22 0600  12.0 S  137.0 E  1007   20                  "
99 APR 23 0600  12.0 S  137.0 E  1007   20                  "
99 APR 24 0600  12.0 S  137.0 E                             "
99 APR 25 0400  11.0 S  127.0 E  1006             Tracked by Darwin      
99 APR 26 0400  10.0 S  128.0 E  1008                     "


Note #1:  These MSW values were calculated from the peak gusts reported
(80 km/hr or 44 kts) in an advice issued by Darwin.


Note #2:  Gales were forecast only for the southern and eastern
quadrants.  In WMO Region 5, the basic definition of a tropical cyclone
requires that 10-min average winds of 34 kts more or less surround the
center in order to be classified as a tropical cyclone.


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


Storm Name: HAMISH (TD F19899)    Cyclone Number: 33S     Basin: AUS/SIO


   Date   Time   Lat      Lon    Cent  MSW   MSW        Remarks
          (GMT)                 Press 1-min 10-min
                                 (mb) (kts) (kts)
-------------------------------------------------------------------------
99 APR 08 1800   8.0 S   85.0 E  1005   15        JTWC Trop. WX Outlook
99 APR 09 0600   7.0 S   84.0 E  1005   25                  "
99 APR 10 1800   8.0 S   85.2 E  1004   25                  "
99 APR 12 1800   8.0 S   85.2 E  1006   20                  "
99 APR 15 1800   9.0 S   84.0 E  1006   15                  "
99 APR 16 1800  11.0 S   86.0 E  1006   20                  "
99 APR 17 1800  12.0 S   90.0 E  1005   20                  "
99 APR 18 1800   8.0 S   91.0 E  1005   20                  " - Relocated
99 APR 19 0600   9.5 S   92.4 E         25        JTWC Formation Alert
99 APR 19 1000   9.3 S   92.2 E  1000         30  See Note #1
99 APR 19 1600   9.3 S   92.5 E  1000         30
99 APR 19 2200   9.8 S   92.6 E  1000   35    30  JTWC-00Z: 11.0S, 93.6E
99 APR 20 0400  11.3 S   93.8 E   998         33  Relocated
99 APR 20 1000  13.1 S   92.4 E   990   45    40  Relocated
99 APR 20 1600  13.6 S   91.9 E   985         45
99 APR 20 2200  13.9 S   91.3 E   985   45    45  JTWC-00Z: 14.5S, 90.5E
99 APR 21 0400  15.0 S   90.5 E   985         55
99 APR 21 1000  15.6 S   90.4 E   985   45    55
99 APR 21 1600  16.0 S   90.1 E   985         50
99 APR 21 1800  15.8 S   89.4 E   992         35  La Reunion Bst Trk Info
99 APR 22 0000  16.1 S   88.6 E   995   45    30  See Note #2
99 APR 22 0600  16.4 S   87.7 E   997         30
99 APR 22 1200  16.7 S   87.3 E   998   40    28
99 APR 22 1800  16.7 S   86.7 E  1000         25
99 APR 23 0000  16.5 S   86.0 E  1000   40    25
99 APR 23 0600  16.2 S   85.3 E  1000         25
99 APR 23 1200  16.2 S   84.8 E  1002   35    25
99 APR 23 1800  16.3 S   84.1 E  1003         25
99 APR 24 0000  16.4 S   83.6 E  1005   25    25
99 APR 24 0600  16.7 S   82.8 E  1007         20


Note #1:  No current estimated MSW was given in the Perth warnings prior
to 20/1000Z.  The values given above were my estimates based on the 
central pressure.


Note #2:  The final Perth warning for 21/2200Z, with the center of
Hamish already west of 90E, estimated the MSW at 40 kts.  This system
was of tropical storm intensity for a few hours west of 90E but was
not renamed by Mauritius, presumably since it was rapidly dissipating
when it crossed into the South Indian Ocean basin.

Document: trak9904.htm
Updated: 18th March 2008

[Australian Severe Weather index] [Copyright Notice] [Email Contacts] [Search This Site]