Tropical Cyclones
[Index] | Tropical Cyclone ELLA : JTWC Advisories |
Season 1998-1999 Summaries (Operational Data): [AU] [SIO] [SPAC] [SH] | |
---> Tropical Cyclone ELLA Track Map and Data |
WTXS22 PGTW 990209 13:30z SUBJ/TROPICAL CYCLONE FORMATION ALERT 091323Z FEB 99// RMKS/ 1. IMMEDIATE DELIVERY REQ TO AMEMBASSY SUVA 2. IMMEDIATE DELIVERY REQ TO AMEMBASSY PORT MORESBY AND AMEMBASSY HONIARA SOLOMON ISLANDS 3. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN A 200 NM RADIUS OF 13.2S6 160.4E1 WITHIN THE NEXT 12 TO 24 HOURS. AVAILABLE DATA DOES NOT JUSTIFY ISSUANCE OF NUMBERED TROPICAL CYCLONE WARNINGS AT THIS TIME. WINDS IN THE AREA ARE ESTIMATED TO BE 20 TO 25 KNOTS. METSAT IMAGERY AT 091130Z INDICATES THAT A CIRCULATION CENTER IS LOCATED NEAR 13.2S6 160.4E1. THE SYSTEM IS QUASI-STATIONARY. 4. REMARKS: 091130 INFRARED SATELLITE IMAGERY INDICATES A WELL DEFINED LOW LEVEL CIRCULATION CENTER ASSOCIATED WITH THE CONVECTION. CURRENT SATELLITE INTENSITY ESTIMATES AND SYNOPTIC SHIP REPORTS IN THE AREA INDICATE MAXIMUM WINDS AT 25 KNOTS. MODERATE SHEAR IS ADVECTING MUCH OF THE CIRRUS TO THE NORTHEAST. HOWEVER, AN UPPER-LEVEL ANTICYCLONE VISIBLE IN THE WATER VAPOR IMAGERY NORTH OF THE SYSTEM MAY ALLOW FOR INCREASED OUTFLOW AND STIMULATE FURTHER DEVELOPMENT. THE UW-CIMSS SHEAR PRODUCT INDICATES STRONG SHEAR TO THE NORTH, BUT MODERATE TO WEAK IN THE IMMEDIATE VICINITY OF THE SYSTEM. SEA SURFACE TEMPERATURE IS NEAR 29 DEGREES, AND MINIMUM SEA LEVEL PRESSURE IS NEAR 999 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN 24 HOURS IS GOOD. 5. THIS ALERT VALID UNTIL 101330Z8.// ========================================================================= WTPS32 PGTW 990210 03:00z SUBJ: TROPICAL CYCLONE WARNING IMMEDIATE DELIVERY REQ TO AMEMBASSY SUVA AMEMBASSY SUVA REQ PASS TO USAID OFDA ADVISOR IMMEDIATE DELIVERY REQ TO AMEMBASSY PORT MORESBY 1. TROPICAL CYCLONE 19P WARNING NR 001 01 ACTIVE TROPICAL CYCLONE IN SOUTHERN HEMISPHERE MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 100000Z1 --- NEAR 11.5S7 160.9E6 MOVEMENT PAST SIX HOURS - 065 DEGREES AT 02 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT REPEAT POSIT: 11.5S7 160.9E6 --- FORECASTS: 12 HRS, VALID AT: 101200Z4 --- 11.5S7 161.4E2 MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT VECTOR TO 24 HR POSIT: 120 DEG/ 03 KTS --- 24 HRS, VALID AT: 110000Z2 --- 11.8S0 161.9E7 MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT RADIUS OF 035 KT WINDS - 075 NM OVER WATER VECTOR TO 36 HR POSIT: 145 DEG/ 04 KTS --- 36 HRS, VALID AT: 111200Z5 --- 12.5S8 162.4E3 MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT RADIUS OF 035 KT WINDS - 085 NM VECTOR TO 48 HR POSIT: 160 DEG/ 06 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 120000Z3 --- 13.7S1 162.9E8 MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT RADIUS OF 035 KT WINDS - 100 NM NORTHEAST SEMICIRCLE 085 NM ELSEWHERE --- REMARKS: 100300Z4 POSITION NEAR 11.5S7 161.0E8. TROPICAL CYCLONE 19P HAS FORMED IN THE MONSOON TROUGH SOUTH OF THE SOLOMON ISLANDS AND IS DRIFTING SLOWLY NORTHEASTWARD IN WEAK ENVIRONMENTAL STEERING FLOW. ANIMATED VISIBLE AND INFRARED SATELLITE IMAGERY INDICATE DEEP CONVECTION HAS ORGANIZED INTO SPIRAL BANDS NORTH AND WEST OF THE SYSTEM CENTER. UPPER-LEVEL OUTFLOW IS FAIR TO GOOD IN ALL QUADRANTS. THE WARNING POSITION AND INTENSITY ARE BASED ON 092330Z7 VISIBLE AND INFRARED INTENSITY ESTIMATES OF 25 KNOTS AND EXTRAPOLATION FROM SHIP SYNOPTIC DATA. TROPICAL CYCLONE 19P IS FORECAST TO TURN TOWARD THE SOUTHEAST AND ACCELERATE TOWARD THE END OF THE FORECAST PERIOD DUE TO A BUILDING MID-LEVEL RIDGE TO ITS EAST. TC 19P IS EXPECTED TO SLOWLY INTENSIFY AS ITS UPPER-LEVEL ANTICYCLONE STRENGTHENS. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 100000Z1 IS 13 FEET. THIS WARNING SUPERSEDES AND CANCELS NAVPACMETOCCEN PEARL HARBOR HI 091323Z FEB 99 TROPICAL CYCLONE FORMATION ALERT (WTPS22 PGTW 091330) NEXT WARNINGS AT 101500Z7 (DTG 101351Z1) AND 110300Z5 (DTG 110151Z9).// ========================================================================= WTPS32 PGTW 990210 15:00z SUBJ: TROPICAL CYCLONE WARNING IMMEDIATE DELIVERY REQ TO AMEMBASSY SUVA AMEMBASSY SUVA REQ PASS TO USAID OFDA ADVISOR IMMEDIATE DELIVERY REQ TO AMEMBASSY PORT MORESBY 1. TROPICAL CYCLONE 19P WARNING NR 002 01 ACTIVE TROPICAL CYCLONES IN SOUTHERN HEMISPHERE MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 101200Z4 --- NEAR 11.2S4 161.0E8 MOVEMENT PAST SIX HOURS - 360 DEGREES AT 01 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER REPEAT POSIT: 11.2S4 161.0E8 --- FORECASTS: 12 HRS, VALID AT: 110000Z2 --- 11.0S2 161.2E0 MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 24 HR POSIT: 070 DEG/ 02 KTS --- 24 HRS, VALID AT: 111200Z5 --- 10.9S0 161.5E3 MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 36 HR POSIT: 120 DEG/ 03 KTS --- 36 HRS, VALID AT: 120000Z3 --- 11.2S4 162.0E9 MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 48 HR POSIT: 155 DEG/ 06 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 121200Z6 --- 12.2S5 162.5E4 MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 101500Z7 POSITION NEAR 11.2S4 161.0E8. TROPICAL CYCLONE 19P HAS REMAINED QUASISTAIONARY SOUTH OF THE SOLOMON ISLANDS OVER THE PAST 12 HOURS. THE WARNING POSITION IS BASED UPON 101130Z6 ANIMATED INFRARED SATELLITE IMAGERY WITH A CURRENT INTENSITY ESTIMATE OF 30 KNOTS. SHIP AND SYNOPTIC DATA ARE INDICATING 20 KNOT WINDS UP TO 180 NM FROM THE CENTER. ANIMATED INFRARED SATELLITE IMAGERY INDICATES STRONG UPPER-LEVEL OUTFLOW TO THE NORTH OF TC 19P AS WELL AS AN AREA OF STRONG SUBSIDENCE SOUTH OF THE SYSTEM. SOUTHERLY FLOW FROM THIS AREA IS ENTRAINING DRY AIR INTO THE LOWER AND MID LEVELS OF TC 19P, HINDERING ITS DEVELOPMENT. TROPICAL CYCLONE 19P IS FORECAST TO MOVE SLOWLY UNTIL PICKED UP BY THE STEERING INFLUENCE OF THE SUBTROPICAL RIDGE WHICH WILL BEGIN TO MOVE THE SYSTEM EASTWARD THROUGH 36 HOURS, THEN SOUTH- SOUTHEASTWARD. TC 19P IS EXPECTED TO WEAKEN AS DRY AIR CONTINUES TO BE ENTRAINED INTO IT AND IT MOVES INTO INCREASING VERTICAL WIND SHEAR. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 101200Z IS 13 FEET. NEXT WARNINGS AT 110300Z5 (DTG 110151Z9) AND 111500Z8 (DTG 111351Z2).// ========================================================================= WTPS32 PGTW 990211 03:00z SUBJ: TROPICAL CYCLONE WARNING IMMEDIATE DELIVERY REQ TO AMEMBASSY SUVA AMEMBASSY SUVA REQ PASS TO USAID OFDA ADVISOR IMMEDIATE DELIVERY REQ TO AMEMBASSY PORT MORESBY 1. TROPICAL CYCLONE 19P WARNING NR 003 RELOCATED 02 ACTIVE TROPICAL CYCLONES IN SOUTHERN HEMISPHERE MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 110000Z2 --- NEAR 11.0S2 163.3E3 MOVEMENT PAST SIX HOURS - 090 DEGREES AT 09 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT REPEAT POSIT: 11.0S2 163.3E3 --- FORECASTS: 12 HRS, VALID AT: 111200Z5 --- 11.6S8 164.1E2 MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT VECTOR TO 24 HR POSIT: 160 DEG/ 07 KTS --- 24 HRS, VALID AT: 120000Z3 --- 12.9S2 164.6E7 MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 36 HR POSIT: 165 DEG/ 08 KTS --- 36 HRS, VALID AT: 121200Z6 --- 14.5S0 165.0E2 MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 48 HR POSIT: 170 DEG/ 09 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 130000Z4 --- 16.3S0 165.3E5 MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 110300Z5 POSITION NEAR 11.2S4 163.5E5. TROPICAL CYCLONE 19P HAS BEEN RELOCATED FURTHER EAST BASED ON CURRENT VISIBLE IMAGERY AND A MICROWAVE IMAGER PASS (102206Z1). TROPICAL CYCLONE 19P HAS TRACKED EASTWARD AT 9 KNOTS OVER THE PAST 6 HOURS UNDER THE STEERING INFLUENCE OF THE SUBTROPICAL RIDGE TO THE NORTH. THE WARNING POSITION IS BASED ON 102330Z9 VISIBLE SATELLITE IMAGERY AND THE 102206Z1 MICROWAVE IMAGER PASS. THE WARNING INTENSITY IS BASED ON CURRENT SATELLITE INTENSITY ESTIMATES OF 35 KNOTS. ANIMATED INFRARED AND VISIBLE SATELLITE IMAGERY INDICATE STRONG UPPER-LEVEL OUTFLOW TO THE EAST AND AN OVERALL WEAKENING OF THE CONVECTION OVER THE PAST THREE HOURS. ANIMATED WATER VAPOR IMAGERY INDICATES A LARGE AREA OF SUBSIDENCE SOUTHWEST OF THE SYSTEM. SOUTHERLY FLOW FROM THIS SUBSIDENCE AREA IS ENTRAINING DRY AIR INTO THE LOWER AND MID LEVELS OF TC 19P. OVER THE NEXT 12 HOURS, TROPICAL CYCLONE 19P IS FORECAST TO BEGIN MOVING SOUTHEASTERLY AS IT GETS PICKED UP BY THE STEERING INFLUENCE OF THE SUBTROPICAL RIDGE TO THE EAST. AFTERWARDS, TC 19P SHOULD BEGIN A MORE SOUTHWARD TRACK AND ACCELERATE AS IT MOVES THROUGH THE ALREADY ESTABLISHED TROUGH. TC 19P IS EXPECTED TO WEAKEN AS DRY AIR CONTINUES TO BE ENTRAINED INTO IT AND IT MOVES INTO INCREASING VERTICAL WINDSHEAR. TC 19P IS EXPECTED TO DISSIPATE AS A SIGNIFICANT TROPICAL CYCLONE BY THE 48 HOUR POSITION. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 110000Z2 IS 13 FEET. NEXT WARNINGS AT 111500Z8 (DTG 111351Z2) AND 120300Z6 (DTG 120151Z0). REFER TO TROPICAL CYCLONE 20P (RONA) WARNINGS (WTPS31 PGTW) FOR TWELVE- HOURLY UPDATES.// ========================================================================= WTPS32 PGTW 990211 15:00z SUBJ: TROPICAL CYCLONE WARNING IMMEDIATE DELIVERY REQ TO AMEMBASSY SUVA AMEMBASSY SUVA REQ PASS TO USAID OFDA ADVISOR IMMEDIATE DELIVERY REQ TO AMEMBASSY PORT MORESBY 1. TROPICAL CYCLONE 19P WARNING NR 004 CORRECTION 02 ACTIVE TROPICAL CYCLONES IN SOUTHERN HEMISPHERE MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 111200Z5 --- NEAR 13.0S4 164.6E7 MOVEMENT PAST SIX HOURS - 155 DEGREES AT 13 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT RADIUS OF 035 KT WINDS - 075 NM NORTHEAST SEMICIRCLE 060 NM ELSEWHERE REPEAT POSIT: 13.0S4 164.6E7 --- FORECASTS: 12 HRS, VALID AT: 120000Z3 --- 15.2S8 165.4E6 MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT RADIUS OF 035 KT WINDS - 090 NM NORTHEAST SEMICIRCLE OVER WATER 070 NM ELSEWHERE OVER WATER VECTOR TO 24 HR POSIT: 165 DEG/ 11 KTS --- 24 HRS, VALID AT: 121200Z6 --- 17.3S1 166.0E3 MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT RADIUS OF 035 KT WINDS - 080 NM EAST SEMICIRCLE 065 NM ELSEWHERE VECTOR TO 36 HR POSIT: 165 DEG/ 12 KTS --- 36 HRS, VALID AT: 130000Z4 --- 19.6S6 166.7E0 MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER RADIUS OF 035 KT WINDS - 065 NM EAST SEMICIRCLE 055 NM ELSEWHERE VECTOR TO 48 HR POSIT: 155 DEG/ 11 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 131200Z7 --- 21.6S9 167.7E1 MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER RADIUS OF 035 KT WINDS - 050 NM NORTHEAST SEMICIRCLE 040 NM ELSEWHERE --- REMARKS: 111500Z8 POSITION NEAR 13.5S9 164.8E9. TROPICAL CYCLONE 19P HAS TRACKED TOWARDS THE SOUTH-SOUTHEAST AT 13 KNOTS DURING THE PAST 6 HOURS. THE WARNING POSITION IS BASED ON 021130Z7 INFRARED SATELLITE IMAGERY. THE WARNING INTENSITY IS BASED ON 021130Z7 SATELLITE CURRENT INTENSITY ESTIMATES OF T3.0 (45 KNOTS). TC 19P HAS ACCELERATED TOWARDS THE SOUTH-SOUTHEAST UNDER THE INCREASED STEERING FLOW OF THE SUBTROPICAL RIDGE TO THE EAST. THIS STEERING FLOW IS EXPECTED TO REMAIN INTACT AND CONTINUE TO TRACK TC 19P TOWARDS THE SOUTH-SOUTHEAST DURING THE FIRST 36 HOURS. AFTERWARDS, THE SYSTEM IS FORECAST TO TRACK MORE SOUTHEASTWARD AS IT MOVES AROUND THE SOUTHWEST PERIPHERY OF THE SUBTROPICAL RIDGE. TC 19P HAS INTENSIFIED AND APPEARS MORE SYMMETRIC AROUND THE CENTER OF CIRCULATION. THIS INTENSIFICATION IS FORECAST TO CONTINUE THROUGHOUT THE FIRST 12 HOURS. AFTERWHICH, TC 19P IS FORECAST TO BEGIN TO WEAKEN AS THE SYSTEM ENCOUNTERS INCREASED SHEAR AND MIXES WITH DRIER AIR ASSOCIATED WITH THE SUBTROPICAL RIDGE. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 111200Z IS 14 FEET. NEXT WARNINGS AT 120300Z6 (DTG 120151Z0) AND 121500Z9 (DTG 121351Z3). REFER TO TROPICAL CYCLONE 20P (NONAME) WARNINGS (WTPS31 PGTW)FOR TWELVE- HOURLY UPDATES.// 2. REASON FOR JUSTIFICATION: CHANGE DISSIPATED TO DISSIPATING ========================================================================= WTPS32 PGTW 990212 03:00z SUBJ: TROPICAL CYCLONE WARNING IMMEDIATE DELIVERY REQ TO AMEMBASSY SUVA AMEMBASSY SUVA REQ PASS TO USAID OFDA ADVISOR IMMEDIATE DELIVERY REQ TO AMEMBASSY PORT MORESBY 1. TROPICAL CYCLONE 19P WARNING NR 005 (ELLA) 02 ACTIVE TROPICAL CYCLONES IN SOUTHERN HEMISPHERE MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 120000Z3 --- NEAR 17.0S8 165.5E7 MOVEMENT PAST SIX HOURS - 170 DEGREES AT 18 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT RADIUS OF 035 KT WINDS - 060 NM EAST SEMICIRCLE 045 NM ELSEWHERE REPEAT POSIT: 17.0S8 165.5E7 --- FORECASTS: 12 HRS, VALID AT: 121200Z6 --- 19.9S9 166.2E5 MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT RADIUS OF 035 KT WINDS - 060 NM EAST SEMICIRCLE 050 NM ELSEWHERE VECTOR TO 24 HR POSIT: 165 DEG/ 15 KTS --- 24 HRS, VALID AT: 130000Z4 --- 22.8S2 167.0E4 MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 36 HR POSIT: 170 DEG/ 15 KTS --- 36 HRS, VALID AT: 131200Z7 --- 25.8S5 167.7E1 MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 48 HR POSIT: 175 DEG/ 15 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 140000Z5 --- 28.8S8 168.1E6 MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 120300Z6 POSITION NEAR 17.7S5 165.7E9. TROPICAL CYCLONE 19P (ELLA) HAS TRACKED TOWARDS THE SOUTH AT 18 KNOTS DURING THE PAST 6 HOURS. THE WARNING POSITION IS BASED ON 112330Z0 VISIBLE AND INFRARED SATELLITE IMAGERY. THE WARNING INTENSITY (40 KNOTS) IS BASED ON 112330Z0 SATELLITE CURRENT INTENSITY ESTIMATES OF 35 AND 45 KNOTS. ANIMATED VISIBLE AND INFRARED IMAGERY INDICATE TC 19P CONTINUES TO MOVE SOUTHWARD WITH MOST OF THE ASSOCIATED CONVECTION POSITIONED TO THE NORTH OF THE LOW-LEVEL CIRCULATION CENTER (LLCC). SATELLITE IMAGERY ALSO INDICATES INCREASING VERTICAL WINDSHEAR AS THE LLCC IS NOW DISPLACED ABOUT 26NM SOUTH OF THE ASSOCIATED CONVECTION. TC 19P HAS CONTINUED TO TRACK SOUTHWARD UNDER THE DOMINANT STEERING INFLUENCE OF THE SUBTROPICAL RIDGE TO THE EAST. TC 19P IS FORECAST TO CONTINUE TRACKING SOUTHWARD AS THIS RIDGE REMAINS THE DOMINANT STEERING INFLUENCE FOR THE REMAINDER OF THE FORECAST PERIOD. TC 19P WILL GRADUALLY DECREASE IN INTENSITY AS IT MOVES INTO AN AREA OF STRONGER SHEAR AND COOLER SEA SURFACE TEMPERATURES. TC 19P IS FORECAST TO DISSIPATE AS A SIGNIFICANT TROPICAL CYCLONE BY THE 48 HOUR PERIOD. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 120000Z3 IS 14 FEET. NEXT WARNINGS AT 121500Z9 (DTG 121351Z3) AND 130300Z7 (DTG 130151Z1). REFER TO TROPICAL CYCLONE 20P (RONA) WARNINGS (WTPS31 PGTW) FOR TWELVE-HOURLY UPDATES.// ========================================================================= WTPS32 PGTW 990212 15:00z IMMEDIATE DELIVERY REQ TO AMEMBASSY SUVA AMEMBASSY SUVA REQ PASS TO USAID OFDA ADVISOR 1. TROPICAL CYCLONE 19P WARNING NR 006 02 ACTIVE TROPICAL CYCLONES IN SOUTHERN HEMISPHERE MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 121200Z6 --- NEAR 21.4S7 167.3E7 MOVEMENT PAST SIX HOURS - 150 DEGREES AT 25 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT REPEAT POSIT: 21.4S7 167.3E7 --- FORECASTS: 12 HRS, VALID AT: 130000Z4 --- 25.4S1 169.4E0 MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 24 HR POSIT: 170 DEG/ 15 KTS --- 24 HRS, VALID AT: 131200Z7 --- 28.3S3 170.1E9 MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 36 HR POSIT: 195 DEG/ 17 KTS --- 36 HRS, VALID AT: 140000Z5 --- 31.7S1 169.2E8 MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 121500Z9 POSITION NEAR 22.4S8 167.8E2. TROPICAL CYCLONE 19P (ELLA) HAS TRACKED TOWARDS THE SOUTH-SOUTHEAST AT 25 KNOTS DURING THE PAST 6 HOURS. THE WARNING POSITION IS BASED ON 121130Z8 INFRARED SATELLITE IMAGERY. THE WARNING INTENSITY IS BASED ON 120600Z9 SYNOPTIC DATA AND EXTRAPOLATION FROM THE PREVIOUS WARNING. TC 19P (ELLA) HAS CONTINUED TO TRACK UNDER THE STEERING INFLUENCE OF THE SUBTROPICAL RIDGE TO THE EAST. THE SYSTEM IS FORECAST TO CONTINUE TRACKING SOUTH-SOUTEASTWARD WHILE GRADUALLY SLOWING DURING THE FIRST 12 HOURS OF THE FORECAST. AFTERWARDS, THE TC 19P (ELLA) IS EXPECTED TO ENTER INTO WEAK STEERING FLOW AS IT TURNS TOWARDS THE SOUTH THEN SOUTH-SOUTHWEST UNDER THE STEERING INFLUENCE OF THE SUBTROPICAL RIDGE CURRENTLY SOUTH OF THE SYSTEM. THIS STEERING FLOW IS FORECAST TO DOMINATE THE SYSTEMS TRACK THROUGHOUT THE REMAINDER OF 36 HOUR FORECAST PERIOD. INCREASING VERTICAL SHEAR AND COOLER SEA SURFACE TEMPERATURE ARE EXPECTED TO BEGIN TO DISSIPATE THE SYSTEM AFTER THE 12 HOUR POSITION. TC 19P (ELLA) IS FORECAST TO DISSIPATE OVER WATER BY THE 36 HOUR FORECAST PERIOD. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 121200Z IS 14 FEET. NEXT WARNINGS AT 130300Z7 (DTG 130151Z1) AND 131500Z0 (DTG 131351Z4). REFER TO TROPICAL CYCLONE 20P (NONAME)WARNINGS (WTPS31 PGTW) FOR TWELVE-HOURLY UPDATES. ========================================================================= WTPS32 PGTW 990212 21:00z SUBJ: TROPICAL CYCLONE WARNING IMMEDIATE DELIVERY REQ TO AMEMBASSY SUVA AMEMBASSY SUVA REQ PASS TO USAID OFDA ADVISOR 1. TROPICAL CYCLONE 19P WARNING NR 007 02 ACTIVE TROPICAL CYCLONES IN SOUTHERN HEMISPHERE MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 121800Z2 --- NEAR 21.8S1 167.5E9 MOVEMENT PAST SIX HOURS - 145 DEGREES AT 15 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT RADIUS OF 035 KT WINDS - 120 NM NORTHEAST SEMICIRCLE 070 NM ELSEWHERE OVER WATER REPEAT POSIT: 21.8S1 167.5E9 --- FORECASTS: 12 HRS, VALID AT: 130600Z0 --- 24.0S6 169.3E9 MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT RADIUS OF 035 KT WINDS - 115 NM EAST SEMICIRCLE 065 NM ELSEWHERE VECTOR TO 24 HR POSIT: 160 DEG/ 13 KTS --- 24 HRS, VALID AT: 131800Z3 --- 26.4S2 170.3E1 MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT VECTOR TO 36 HR POSIT: 175 DEG/ 11 KTS --- 36 HRS, VALID AT: 140600Z1 --- 28.6S6 170.5E3 MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 48 HR POSIT: 180 DEG/ 10 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 141800Z4 --- 30.6S9 170.5E3 MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 122100Z6 POSITION NEAR 22.4S8 168.0E5. TROPICAL CYCLONE 19P (ELLA) IS MOVING SOUTH-SOUTHEASTWARD AT 15 KNOTS EAST OF NEW CALEDONIA. ANIMATED INFRARED SATELLITE IMAGERY INDICATES THIS SYSTEM HAS REDEVELOPED CENTRAL CONVECTION OVER THE PAST 06 HOURS. THE WARNING POSITION AND INTENSITY ARE BASED ON A 121730Z4 INFRARED INTENSITY ESTIMATE OF 25 KNOTS AUGMENTED BY 121153Z3 SCATTEROMETER DATA. WIND RADII HAVE BEEN ADDED BASED ON THE SCATTEROMETER DATA. TROPICAL CYCLONE 19P (ELLA) IS FORECAST TO CONTINUE MOVING SOUTH-SOUTHEASTWARD THROUGH 12 HOURS THEN MOVE SOUTHWARD UNDER THE ENVIRONMENTAL STEERING INFLUENCE OF A MID-LEVEL RIDGE TO THE EAST. TC 19P (ELLA) IS EXPECTED TO SLOWLY WEAKEN UNDER THE INFLUENCE OF WESTERLY VERTICAL WIND SHEAR AND MOVEMENT OVER COOLER SEA SURFACE TEMPERATURES. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 121800Z2 IS 15 FEET. REFER TO WWPWPN30 PGFW FOR ADDITIONAL SEA HEIGHT INFORMATION. NEXT WARNINGS AT 130300Z7 (DTG 130151Z1), 130900Z3 (DTG 130751Z7), 131500Z0 (DTG 131351Z4) AND 132100Z7 (DTG 131951Z0). REFER TO TROPICAL CYCLONE 20P (RONA) WARNINGS (WTPS31 PGTW) FOR TWELVE-HOURLY UPDATES.// ========================================================================= WTPS32 PGTW 990213 03:00z SUBJ: TROPICAL CYCLONE WARNING IMMEDIATE DELIVERY REQ TO AMEMBASSY SUVA AMEMBASSY SUVA REQ PASS TO USAID OFDA ADVISOR 1. TROPICAL CYCLONE 19P (ELLA) WARNING NR 008 02 ACTIVE TROPICAL CYCLONES IN SOUTHERN HEMISPHERE MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 130000Z4 --- NEAR 23.2S7 168.7E2 MOVEMENT PAST SIX HOURS - 140 DEGREES AT 16 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT RADIUS OF 035 KT WINDS - 105 NM NORTHEAST SEMICIRCLE 060 NM ELSEWHERE REPEAT POSIT: 23.2S7 168.7E2 --- FORECASTS: 12 HRS, VALID AT: 131200Z7 --- 25.4S1 170.4E2 MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 24 HR POSIT: 165 DEG/ 11 KTS --- 24 HRS, VALID AT: 140000Z5 --- 27.5S4 171.0E9 MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 36 HR POSIT: 175 DEG/ 10 KTS --- 36 HRS, VALID AT: 141200Z8 --- 29.4S5 171.1E0 MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 130300Z7 POSITION NEAR 23.7S2 169.1E7. TROPICAL CYCLONE 19P (ELLA) CONTINUES TO MOVE SOUTH-SOUTHEASTWARD IN THE SOUTH PACIFIC OCEAN. THE LOW-LEVEL CIRCULATION CENTER HAS BECOME PARTLY EXPOSED DURING THE PAST 06 HOURS DUE TO WESTERLY VERTICAL WIND SHEAR. THE WARNING POSITION AND INTENSITY ARE BASED ON 122330Z1 VISIBLE AND INFRARED SATELLITE INTENSITY ESTIMATES OF 25 KNOTS AND EXTRAPOLATION FROM 121153Z3 SCATTEROMETER DATA. THERE IS NO SIGNIFICANT CHANGE TO FORECAST REASONING. TC 19P (ELLA) IS EXPECTED TO TRACK SOUTHWARD IN ENVIRONMENTAL STEERING FLOW FROM A LOW-TO MID-LEVEL RIDGE TO THE EAST. THIS SYSTEM IS ANTICIPATED TO CONTINUE WEAKENING DUE TO VERTICAL SHEAR AND COOLER SEA SURFACE TEMPERATURES, DISSIPATING BY 36 HOURS. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 130000Z4 IS 14 FEET. REFER TO WWPW30 PGFW FOR ADDITIONAL SEA HEIGHT INFORMATION. NEXT WARNINGS AT 130900Z3 (DTG 130751Z7), 131500Z0 (DTG 131351Z4), 132100Z7 (DTG 131951Z0) AND 140300Z8 (DTG 140151Z2). REFER TO TROPICAL CYCLONE 20P (RONA) WARNING (WTPS31 PGTW) FOR THE FINAL WARNING ON THIS SYSTEM.// ========================================================================= WTPS32 PGTW 990213 09:00z SUBJ: TROPICAL CYCLONE WARNING IMMEDIATE DELIVERY REQ TO AMEMBASSY SUVA AMEMBASSY SUVA REQ PASS TO USAID OFDA ADVISOR 1. TROPICAL CYCLONE 19P (ELLA) WARNING NR 009 02 ACTIVE TROPICAL CYCLONES IN SOUTHERN HEMISPHERE MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 130600Z0 --- NEAR 24.5S1 169.8E4 MOVEMENT PAST SIX HOURS - 140 DEGREES AT 16 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT RADIUS OF 035 KT WINDS - 105 NM NORTHEAST SEMICIRCLE 060 NM ELSEWHERE REPEAT POSIT: 24.5S1 169.8E4 --- FORECASTS: 12 HRS, VALID AT: 131800Z3 --- 26.9S7 171.8E7 MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER RADIUS OF 035 KT WINDS - 095 NM NORTHEAST SEMICIRCLE 050 NM ELSEWHERE VECTOR TO 24 HR POSIT: 165 DEG/ 13 KTS --- 24 HRS, VALID AT: 140600Z1 --- 29.4S5 172.6E6 MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 36 HR POSIT: 180 DEG/ 12 KTS --- 36 HRS, VALID AT: 141800Z4 --- 31.7S1 172.5E5 MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 48 HR POSIT: 195 DEG/ 13 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 150600Z2 --- 34.2S9 171.6E5 MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 130900Z3 POSITION NEAR 25.1S8 170.3E1. TROPICAL CYCLONE 19P (ELLA) CONTINUES TO MOVE SOUTHEASTWARD IN THE SOUTH PACIFIC OCEAN. THE WARNING POSITION AND INTENSITY ARE BASED ON 130530Z2 VISIBLE AND INFRARED SATELLITE IMAGERY WITH CURRENT INTENSITY ESTIMATES OF 30 KNOTS AND 130000Z4 SHIP AND SYNOPTIC DATA REPORTS OF 20 KNOTS 200 NM OF THE 130600Z0 WARNING POSITION. HOWEVER,THE INTENSITY IS CONSISTENT WITH THE PREVIOUS FORECAST AS THE LOW LEVEL CIRCULATION CENTER HAS MOVED BACK UNDER THE STRONG CONVECTION.THEN, TC 19P SHOULD WEAKEN AS THE VERTICAL WIND SHEAR INCREASES. TC 19P (ELLA) IS EXPECTED TO TRACK SOUTHWARD WITHIN THE ENVIRONMENTAL STEERING FLOW FROM A LOW-TO MID-LEVEL RIDGE TO THE EAST. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 130600Z IS 14 FEET. REFER TO WWPW30 PGFW FOR ADDITIONAL SEA HEIGHT INFORMATION. NEXT WARNINGS AT 131500Z0 (DTG 131351Z4), 132100Z7 (DTG 131951Z0), 140300Z8 (DTG 140151Z2) AND 140900Z4 (DTG 140751Z8). REFER TO TROPICAL CYCLONE 20P (RONA)WARNINGS (WTPS31 PGTW) FOR THE FINAL WARNING ON THIS SYSTEM.// ========================================================================= WTPS32 PGTW 990213 15:00z SUBJ: TROPICAL CYCLONE WARNING IMMEDIATE DELIVERY REQ TO AMEMBASSY SUVA AMEMBASSY SUVA REQ PASS TO USAID OFDA ADVISOR 1. TROPICAL CYCLONE 19P (ELLA) WARNING NR 010 02 ACTIVE TROPICAL CYCLONES IN SOUTHERN HEMISPHERE MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 131200Z7 --- NEAR 25.2S9 170.1E9 MOVEMENT PAST SIX HOURS - 160 DEGREES AT 08 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER REPEAT POSIT: 25.2S9 170.1E9 --- FORECASTS: 12 HRS, VALID AT: 140000Z5 --- 26.9S7 170.8E6 MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 24 HR POSIT: 160 DEG/ 12 KTS --- 24 HRS, VALID AT: 141200Z8 --- 29.1S2 171.8E7 MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 36 HR POSIT: 180 DEG/ 11 KTS --- 36 HRS, VALID AT: 150000Z6 --- 31.3S7 171.8E7 MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 131500Z0 POSITION NEAR 25.6S3 170.3E1. TROPICAL CYCLONE 19P (ELLA) CONTINUES TO MOVE SOUTH-SOUTHEASTWARD AT 08 KNOTS IN THE SOUTH PACIFIC OCEAN. THE WARNING POSITION AND INTENSITY ARE BASED ON 131130Z2 INFRARED SATELLITE IMAGERY WITH CURRENT INTENSITY ESTIMATES OF 30 KNOTS, AND 131200Z7 SHIP AND SYNOPTIC DATA REPORTS OF 10 KNOTS 200 NM OF THE 131200Z7 WARNING POSITION. THE INTENSITY IS FORECAST TO CONTINUE WEAKENING AS THE SYSTEM ENCOUNTERS A STRONG VERTICAL WIND SHEAR ENVIRONMENT AND COOLER SEA SURFACE TEMPERATURES. TC 19P (ELLA) IS EXPECTED TO TRACK SOUTHWARD IN THE ENVIRONMENTAL STEERING FLOW FROM THE LOW-TO MID-LEVEL RIDGE TO THE EAST. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 131200Z IS 14 FEET. REFER TO WWPW31 FOR ADDITIONAL SEA HEIGHT INFORMATION. NEXT WARNINGS AT 132100Z7 (DTG 131951Z0), 140300Z8 (DTG 140151Z2), 140900Z4 (DTG 140751Z8) AND 141500Z1 (DTG 41351Z5). REFER TO TROPICAL CYCLONE 20P WARNINGS (WTPS31 PGTW)FOR THE FINAL WARNING FOR THIS SYSTEM.// ========================================================================= WTPS32 PGTW 990213 21:00z SUBJ: TROPICAL CYCLONE WARNING IMMEDIATE DELIVERY REQ TO AMEMBASSY SUVA AMEMBASSY SUVA REQ PASS TO USAID OFDA ADVISOR 1. TROPICAL CYCLONE 19P (ELLA) WARNING NR 011 02 ACTIVE TROPICAL CYCLONES IN SOUTHERN HEMISPHERE MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 131800Z3 --- NEAR 25.5S2 170.3E1 MOVEMENT PAST SIX HOURS - 150 DEGREES AT 06 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER REPEAT POSIT: 25.5S2 170.3E1 --- FORECASTS: 12 HRS, VALID AT: 140600Z1 --- 26.4S2 170.8E6 MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 24 HR POSIT: 165 DEG/ 05 KTS --- 24 HRS, VALID AT: 141800Z4 --- 27.4S3 171.1E0 MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 132100Z7 POSITION NEAR 25.7S4 170.4E2. TROPICAL CYCLONE 19P (ELLA) IS MOVING SOUTH-SOUTHEASTWARD AT 06 KNOTS IN THE SOUTH PACIFIC OCEAN. ANIMATED INFRARED IMAGERY INDICATES DEEP CONVECTION PREVIOUSLY ASSOCIATED WITH THIS SYSTEM HAS DISSIPATED DUE TO MODERATE WESTERLY VERTICAL WIND SHEAR. THE LOW-LEVEL CIRCULATION APPEARS TO HAVE SLOWED AND IS BEING STEERED BY LOW-LEVEL NORTHWESTERLY WIND FLOW. THE WARNING POSITION AND INTENSITY ARE BASED ON 131730Z5 INFRARED SATELLITE INTENSITY ESTIMATES OF 25 KNOTS AND 30 KNOTS. THERE IS NO SIGNIFICANT CHANGE TO FORECAST REASONING. TC 19P (ELLA) IS FORECAST TO CONTINUE MOVING SLOWLY SOUTH-SOUTHEASTWARD AND DISSIPATE WITHIN 24 HOURS DUE TO MODERATE VERTICAL SHEAR AND COOLER SEA SURFACE TEMPERATURES. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 131800Z3 IS 14 FEET. THIS IS THE FINAL WARNING ON THIS SYSTEM BY THE JOINT TYPHOON WARNING CENTER (NAVPACMETOCCEN PEARL HARBOR HI). THE SYSTEM WILL BE CLOSELY MONITORED FOR SIGNS OF REGENERATION. REFER TO TROPICAL CYCLONE 21S WARNINGS (WTXS31 PGTW) FOR SIX-HOURLY UPDATES.//
Tropical cyclone tracks developed by Michael Bath using operational warnings and advisories.
Document: tropical_cyclone_ella_jtwc_advisories.htm
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