From: Gary Padgett To: Michael V. Padua Subject: March Tracks Date: Wednesday, July 15, 1998 5:52 PM GLOBAL TROPICAL CYCLONE TRACKS - MARCH 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. ************************************************************************* Storm Name: DONALINE Cyclone Number: 26-S Basin: SIO Date Time Lat Lon Cen Pres MSW Remarks (GMT) (mb) (kts) ------------------------------------------------------------------------- 98 MAR 06 1200 17.3 S 67.0 E 30 98 MAR 07 0000 16.5 S 69.1 E 40 98 MAR 07 1200 17.9 S 70.1 E 50 98 MAR 08 0000 19.6 S 70.0 E 55 98 MAR 08 1200 20.7 S 69.9 E 50 98 MAR 09 0000 22.7 S 71.7 E 45 98 MAR 09 1200 23.5 S 72.6 E 35 98 MAR 10 0000 26.4 S 72.2 E 30 98 MAR 10 1200 28.9 S 72.3 E 30 ************************************************************************* Storm Name: ELSIE Cyclone Number: 27-S Basin: SIO Date Time Lat Lon Cen Pres MSW Remarks (GMT) (mb) (kts) ------------------------------------------------------------------------- 98 MAR 12 0000 17.1 S 82.6 E 35 98 MAR 12 1200 18.6 S 81.5 E 45 98 MAR 12 1800 19.1 S 81.3 E 60 98 MAR 13 0000 19.4 S 81.2 E 65 98 MAR 13 1200 20.3 S 81.2 E 90 98 MAR 14 0000 20.9 S 80.9 E 75 98 MAR 14 1200 21.4 S 80.8 E 65 98 MAR 15 0000 21.3 S 79.9 E 50 98 MAR 15 1200 22.5 S 77.9 E 45 98 MAR 16 0000 23.1 S 77.9 E 40 98 MAR 16 1200 24.7 S 77.0 E 40 98 MAR 17 0000 25.4 S 76.7 E 35 98 MAR 17 1200 26.1 S 78.8 E 35 ************************************************************************* Storm Name: FIONA Cyclone Number: 28-S Basin: SIO Date Time Lat Lon Cen Pres MSW Remarks (GMT) (mb) (kts) ------------------------------------------------------------------------- 98 MAR 17 0000 17.4 S 61.5 E 40 98 MAR 17 1200 17.3 S 59.7 E 35 98 MAR 18 0000 18.7 S 60.6 E 35 98 MAR 18 1200 19.8 S 59.9 E 40 98 MAR 19 0000 19.5 S 60.3 E 40 98 MAR 19 1200 19.9 S 58.9 E 40 98 MAR 20 0000 21.5 S 58.5 E 35 98 MAR 20 1200 22.8 S 58.8 E 35 ************************************************************************* ************************************************************************* AUSTRALIAN REGION (AUS) - From Longitude 90E Eastward to Longitude 160E NOTE: The tracks presented below are based on operational warnings from the Australian Tropical Cyclone Warning Centre at Brisbane, Queensland. The MSW in the tables below 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 mentioned in the Remarks column, are 1-min average sustained winds. To convert these to equivalent 10-min average winds, multiply by 0.87. JTWC = Joint Typhoon Warning Center, Guam, Marianas Islands ************************************************************************* Storm Name: NATHAN Cyclone Number: 30-P Basin: AUS Date Time Lat Lon Cen Pres MSW Remarks (GMT) (mb) (kts) ------------------------------------------------------------------------- 98 MAR 21 0000 11.3 S 143.5 E 995 40 98 MAR 21 0600 11.4 S 144.0 E 990 50 JTWC: 40kts/11.3S,143.2E 98 MAR 21 1200 11.9 S 144.3 E 990 50 98 MAR 21 1800 12.0 S 144.7 E 990 50 98 MAR 22 0000 11.2 S 144.7 E 990 50 Relocated 98 MAR 22 0600 11.4 S 144.9 E 990 50 98 MAR 22 1200 11.6 S 144.9 E 995 45 JTWC: 12.5S, 145.6E 98 MAR 22 1800 12.1 S 145.3 E 995 45 98 MAR 23 0000 13.2 S 145.5 E 995 45 Relocated 98 MAR 23 0600 13.8 S 145.8 E 995 45 98 MAR 23 1200 14.2 S 146.1 E 995 45 JTWC: 65 kts (1-min avg) 98 MAR 23 1800 14.2 S 146.4 E 995 45 98 MAR 24 0000 14.0 S 147.2 E 990 50 JTWC: 14.8S, 146.6E 98 MAR 24 0600 13.7 S 147.9 E 990 50 JTWC: 14.6S, 147.7E 98 MAR 24 1200 13.5 S 148.6 E 990 50 98 MAR 24 1800 13.4 S 149.7 E 990 50 98 MAR 25 0000 13.0 S 151.6 E 990 50 98 MAR 25 0600 12.9 S 153.4 E 995 45 98 MAR 25 1200 12.7 S 155.0 E 995 45 98 MAR 25 1800 13.0 S 156.0 E 995 45 98 MAR 26 0000 13.1 S 157.1 E 995 45 98 MAR 26 0600 13.5 S 157.5 E 995 45 98 MAR 26 1200 14.2 S 158.2 E 995 45 98 MAR 26 1800 14.6 S 158.4 E 995 45 98 MAR 27 0000 14.8 S 158.7 E 30 JTWC: 40 kts (1-min avg) 98 MAR 27 1200 15.8 S 158.8 E 45 JTWC Warning (see note) 98 MAR 28 0000 16.1 S 158.0 E 40 98 MAR 28 1200 16.6 S 156.8 E 40 98 MAR 29 0000 16.1 S 155.0 E 40 98 MAR 29 0600 15.9 S 154.1 E 40 98 MAR 29 1200 15.4 S 152.9 E 40 98 MAR 29 1800 15.0 S 151.9 E 35 98 MAR 30 0000 15.1 S 151.4 E 35 98 MAR 30 0600 15.1 S 150.1 E 35 98 MAR 30 1200 15.1 S 148.8 E 35 98 MAR 30 1800 14.8 S 147.3 E 35 98 MAR 31 0000 13.5 S 144.9 E 30 NOTE: All tracking information after 1200 UTC on 27 March is based on JTWC warnings. Brisbane TCWC downgraded Nathan to a depression at 27/0000 UTC and issued no more bulletins. ************************************************************************* ************************************************************************* 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, mentioned in the Remarks column, are 1-min average sustained winds. To convert these to equivalent 10-min average winds, multiply by 0.87. ************************************************************************* Storm Name: Tropical Depression Cyclone Number: NONE Basin: SWP Date Time Lat Lon Cen Pres MSW Remarks (GMT) (mb) (kts) ------------------------------------------------------------------------- 98 FEB 28 0600 11.0 S 164.3 E 998 25 98 FEB 28 1200 11.0 S 164.0 E 998 25 98 FEB 28 1800 11.5 S 164.5 E 998 25 98 MAR 01 0000 11.5 S 165.5 E 998 25 98 MAR 01 0600 12.5 S 167.0 E 998 25 98 MAR 01 1200 12.5 S 167.5 E 998 25 98 MAR 01 1800 12.5 S 169.5 E 998 25 98 MAR 02 0000 13.6 S 171.7 E 997 30 Gales in east semi-circle 98 MAR 02 0600 14.6 S 170.9 E 998 30 Relocated ************************************************************************* Storm Name: YALI Cyclone Number: 29-P Basin: SWP Date Time Lat Lon Cen Pres MSW Remarks (GMT) (mb) (kts) ------------------------------------------------------------------------- 98 MAR 18 1200 11.9 S 166.9 E 35 JTWC Warning 98 MAR 18 1800 12.5 S 165.5 E 999 25 JTWC: 40kts/12.1S,166.4E 98 MAR 19 0000 12.5 S 165.3 E 999 25 JTWC: 35 kts (1-min avg) 98 MAR 19 0600 13.0 S 164.8 E 997 30 98 MAR 19 1200 13.5 S 164.0 E 997 30 98 MAR 19 1800 13.6 S 163.6 E 995 35 98 MAR 20 0000 13.6 S 163.5 E 990 40 98 MAR 20 0600 13.7 S 164.0 E 987 45 JTWC: 13.8S, 163.1E 98 MAR 20 1200 14.0 S 164.2 E 985 50 JTWC: 14.1S, 162.8E 98 MAR 20 1800 14.7 S 164.4 E 980 55 JTWC: 14.3S, 162.5E 98 MAR 21 0000 15.9 S 164.8 E 980 55 98 MAR 21 0600 16.5 S 165.4 E 975 60 98 MAR 21 1200 17.0 S 166.3 E 970 65 JTWC: 80 kts (1-min avg) 98 MAR 21 1800 17.3 S 167.0 E 970 65 98 MAR 22 0000 17.8 S 167.7 E 970 65 JTWC: 90 kts (1-min avg) 98 MAR 22 0600 18.9 S 168.3 E 965 70 98 MAR 22 1200 19.7 S 169.6 E 965 70 JTWC: 19.5S, 168.9E 98 MAR 22 1800 20.3 S 170.0 E 975 60 98 MAR 23 0000 20.6 S 169.9 E 985 50 98 MAR 23 0600 21.3 S 169.6 E 985 50 98 MAR 23 1200 22.0 S 168.8 E 987 45 98 MAR 23 1800 22.8 S 167.3 E 985 50 98 MAR 24 0000 24.0 S 165.2 E 987 45 JTWC: 24.2S, 164.6E 98 MAR 24 0600 24.4 S 163.5 E 987 45 98 MAR 24 1200 24.3 S 163.3 E 987 45 98 MAR 24 1800 24.3 S 162.4 E 985 45 98 MAR 25 0000 25.1 S 162.1 E 992 40 JTWC: 50 kts/25.1S,161.4E 98 MAR 25 1200 25.9 S 160.3 E 45 JTWC Warning 98 MAR 25 1800 25.9 S 159.4 E 990 50 Brisbane Warning 98 MAR 26 0000 26.0 S 158.5 E 990 45 JTWC & Sydney Warning 98 MAR 26 1200 26.0 S 158.3 E 994 40 JTWC Warning 98 MAR 27 0000 30.3 S 158.2 E 45 " " ************************************************************************* 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 ************************************************************************* ************************************************************************* *************************************************************************