Tropical Cyclones
[Index] | Tropical Cyclone INNIS : JTWC Advisories |
Season 2008-2009 Summaries (Operational Data): [AU] [SIO] [SPAC] [SH] | |
---> Tropical Cyclone INNIS Track Map and Data |
WTPS21 PGTW 20090216 21:30z MSGID/GENADMIN/NAVMARFCSTCEN PEARL HARBOR HI/JTWC// SUBJ/TROPICAL CYCLONE FORMATION ALERT// RMKS/ 1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN 165 NM EITHER SIDE OF A LINE FROM 19.6S 166.5E TO 21.6S 159.4E 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 25 TO 30 KNOTS. METSAT IM- AGERY AT 161800Z INDICATES THAT A CIRCULATION CENTER IS LOCATED NEAR 20.0S 165.9E. THE SYSTEM IS MOVING WEST-SOUTHWESTWARD AT 18 KNOTS. 2. REMARKS: THE AREA OF CONVECTION PREVIOUSLY LOCATED NEAR 17.2S 171.5E 171.5E IS NOW LOCATED NEAR 20.0S 165.9E, APPROXIMATELY 150 NM NORTH- NORTHWEST OF NOUMEA, NEW CALEDONIA. ANIMATED INFRARED SATELLITE IMAGERY INDICATES A WELL DEFINED LOW LEVEL CIRCULATION CENTER (LLCC) THAT HAS SEEN A SIGNIFICANT INCREASE IN BANDING CONVECTION DEVELOPING TOWARDS THE CENTER AS INDICATED BY A 161720Z AMSU-B PASS. THE LLCC HAS REMAINED WELL DEFINED OVER THE PAST 06 HOURS BUT MODERATE VERT- ICAL WIND SHEAR HAS ALLOWED THE LLCC TO REMAIN PARTIALLY EXPOSED WITH THE MAJORITY OF CONVECTION ON THE SOUTHERN AND SOUTHEASTERN PERIPHERY BUT IMPROVING. THE UPPER-LEVEL ENVIRONMENT HAS REMAINED FAVORABLE WITH AN ANTICYCLONE OVER THE LLCC AND ENHANCED POLEWARD OUTFLOW CAUSED BY A SHIFT IN THE UPPER-LEVEL TROUGH/LOW NORTHWEST OF THE SYSTEM. ANIMATED WATER VAPOR IMAGERY REFLECTS THIS IMPROVEMENT WITH EXPANDING POLEWARD OUTFLOW EVIDENT OVER THE SOUTHERN SEMI-CIRCLE. SST IS ALSO FAVORABLE FOR FURTHER DEVELOPMENT. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 25 TO 30 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1000 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS REMAINS GOOD. THIS SUPERSEDES REF A. 3. THIS ALERT WILL BE REISSUED, UPGRADED TO WARNING OR CANCELLED BY 172130Z.// ========================================================================= WTPS31 PGTW 20090217 03:00z MSGID/GENADMIN/NAVMARFCSTCEN PEARL HARBOR HI/JTWC// SUBJ/TROPICAL CYCLONE 15P (FIFTEEN) WARNING NR 001// RMKS/ 1. TROPICAL CYCLONE 15P (FIFTEEN) WARNING NR 001 01 ACTIVE TROPICAL CYCLONE IN SOUTHPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 170000Z --- NEAR 20.7S 165.1E MOVEMENT PAST SIX HOURS - 225 DEGREES AT 10 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 WIND RADII VALID OVER OPEN WATER ONLY REPEAT POSIT: 20.7S 165.1E --- FORECASTS: 12 HRS, VALID AT: 171200Z --- 22.9S 163.1E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 035 NM NORTHEAST QUADRANT 035 NM SOUTHEAST QUADRANT 035 NM SOUTHWEST QUADRANT 035 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 205 DEG/ 18 KTS --- 24 HRS, VALID AT: 180000Z --- 26.2S 161.4E MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT 050 NM SOUTHEAST QUADRANT 050 NM SOUTHWEST QUADRANT 050 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 190 DEG/ 18 KTS --- 36 HRS, VALID AT: 181200Z --- 29.8S 160.8E MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 055 NM NORTHEAST QUADRANT 055 NM SOUTHEAST QUADRANT 055 NM SOUTHWEST QUADRANT 055 NM NORTHWEST QUADRANT VECTOR TO 48 HR POSIT: 155 DEG/ 21 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 190000Z --- 33.5S 162.9E MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT 050 NM SOUTHEAST QUADRANT 050 NM SOUTHWEST QUADRANT 050 NM NORTHWEST QUADRANT --- REMARKS: 170300Z POSITION NEAR 21.2S 164.6E. TROPICAL CYCLONE (TC) 15P (FIFTEEN), LOCATED APPROXIMATELY 120 NM NORTHWEST OF NOUMEA, NEW CALEDONIA, HAS TRACKED SOUTHWESTWARD AT 10 KNOTS OVER THE PAST 06 HOURS. ANIMATED MULTISPECTRAL IMAGERY INDICATES IMPROVING CONVECTION DEVELOPING OVER A LOW LEVEL CIRCULATION CENTER (LLCC). A 161824Z WINDSAT PASS INDICATES TIGHT BANDING WRAPPING ABOUT THE LLCC WITH DEEP CONVECTION ON THE SOUTHERN PERIPHERY. THE UPPER-LEVEL ENVIRONMENT HAS REMAINED FAVORABLE WITH AN ANTICYCLONE OVER THE LLCC AND ENHANCED POLEWARD OUTFLOW CAUSED BY A SHIFT IN THE UPPER-LEVEL TROUGH/LOW NORTHWEST OF THE SYSTEM. ANIMATED WATER VAPOR IMAGERY REFLECTS THIS IMPROVEMENT WITH EXPANDING POLEWARD OUTFLOW EVIDENT OVER THE SOUTHERN SEMI-CIRCLE. SST IS ALSO FAVORABLE FOR FURTHER DEVELOPMENT. TC 15P WILL TRACK AROUND A MID-LEVEL SUBTROPICAL RIDGE THAT IS WEAKENING ON ITS WESTERN FLANK AND WILL ALLOW THE SYSTEM TO SHIFT FROM A SOUTHWESTWARD TRACK TO A SOUTHWARD TRACK. CONTINUED UPPER LEVEL OUTFLOW AND A FAVORABLE SST WILL ALLOW TC 15P TO INTENSIFY THROUGH TAU 36 THEN BEGIN TO WEAKEN AS A MID-LATITUDE TROUGH INTERACTS WITH TC 15P. THIS FORECAST FAVORS THE CONSENSUS OF DYNAMIC AIDS WHICH ARE IN FAIR AGREEMENT. THIS WARNING SUPERSEDES AND CANCELS REF A, NAVMARFCSTCEN 162121Z FEB 09 TROPICAL CYCLONE FORMATION ALERT (WTPS21 PGTW 162130) MAXIMUM SIGNIFICANT WAVE HEIGHT AT 170000Z IS 10 FEET. NEXT WARNINGS AT 171500Z AND 180300Z.// ========================================================================= WTPS31 PGTW 20090217 15:00z 1. TROPICAL CYCLONE 15P (INNIS) WARNING NR 002 01 ACTIVE TROPICAL CYCLONE IN SOUTHPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 171200Z --- NEAR 23.1S 163.5E MOVEMENT PAST SIX HOURS - 210 DEGREES AT 14 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 WIND RADII VALID OVER OPEN WATER ONLY REPEAT POSIT: 23.1S 163.5E --- FORECASTS: 12 HRS, VALID AT: 180000Z --- 26.2S 162.4E MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT 055 NM SOUTHEAST QUADRANT 050 NM SOUTHWEST QUADRANT 045 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 185 DEG/ 18 KTS --- 24 HRS, VALID AT: 181200Z --- 29.8S 161.9E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 045 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 035 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 175 DEG/ 19 KTS --- 36 HRS, VALID AT: 190000Z --- 33.6S 162.5E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 171500Z POSITION NEAR 23.9S 163.2E. TROPICAL CYCLONE (TC) 15P (INNIS), LOCATED APPROXIMATELY 175 NM WEST-SOUTHWEST OF NOUMEA, NEW CALEDONIA, HAS TRACKED SOUTH- SOUTHWESTWARD AT 14 KNOTS OVER THE PAST 06 HOURS. THE SYSTEM REMAINS A WEAK AND SMALL TROPICAL CYCLONE, WITH WHAT NOW APPEARS TO BE ONLY A LIMITED TIMEFRAME FOR FURTHER INTENSIFI- CATION BEFORE ENTERING A LESS FAVORABLE ENVIRONMENT. THE CURRENT INTENSITY IS BASED ON DVORAK SATELLITE INTENSITY ESTIMATES FROM PGTW AND APRF RANGING FROM 30 TO 40 KNOTS. UPPER LEVEL CONDITIONS WILL REMAIN CONDUCIVE FOR INTENSIFICATION OVER THE NEXT 12 HOURS WITH INCREASED POLEWARD AND EQUATORWARD OUTFLOW AND LOW TO MODERATE VERTICAL WIND SHEAR. BEYOND TAU 12 SEA SURFACE TEMP- ERATURES WILL DROP BELOW 26 DEGREES CELSIUS AND VERTICAL WIND SHEAR WILL HEIGHTEN AS A DEEPENING UPPER LEVEL LOW ENCROACHES ON THE SYSTEM FROM THE WEST. A TIGHTENING GRADIENT BETWEEN THE MID- LEVEL REFLECTION OF THE UPPER LEVEL LOW, AND THE LOW TO MID-LEVEL SUBTROPICAL RIGDE TO THE EAST, WILL SET UP STRONG NORTHERLIES ALOFT, RAPIDLY STEERING THE CYCLONE POLEWARD. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 171200Z IS 11 FEET. NEXT WARNINGS AT 180300Z AND 181500Z. ========================================================================= WTPS31 PGTW 20090218 03:00z MSGID/GENADMIN/NAVMARFCSTCEN PEARL HARBOR HI/JTWC// SUBJ/TROPICAL CYCLONE 15P (INNIS) WARNING NR 003 RELOCATED// RMKS/ 1. TROPICAL CYCLONE 15P (INNIS) WARNING NR 003 RELOCATED 01 ACTIVE TROPICAL CYCLONE IN SOUTHPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 180000Z --- NEAR 27.2S 160.4E MOVEMENT PAST SIX HOURS - 195 DEGREES AT 21 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 WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER REPEAT POSIT: 27.2S 160.4E --- FORECASTS: 12 HRS, VALID AT: 181200Z --- 31.4S 159.7E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT 055 NM SOUTHEAST QUADRANT 050 NM SOUTHWEST QUADRANT 045 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 170 DEG/ 22 KTS --- 24 HRS, VALID AT: 190000Z --- 35.8S 160.6E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 180300Z POSITION NEAR 28.2S 160.2E. TROPICAL CYCLONE (TC) 15P (INNIS), LOCATED APPROXIMATELY 395 NM EAST OF BRISBANE, AUSTRALIA, HAS TRACKED SOUTH-SOUTHWESTWARD AT 21 KNOTS OVER THE PAST 06 HOURS. ANIMATED MULTISPECTRAL IMAGERY INDICATES THE LOW LEVEL CIRCULATION CENTER (LLCC) HAS BECOME SHEARED FROM THE MAJORITY OF DEEP CONVECTION BY OVER 90 NM. OVER THE PAST 12 HOURS TC 15P HAS INCREASED TRACK SPEED AND HAS MOVED INTO A REGION OF UNFAVORABLE SST. A MID TO UPPER LEVEL TROUGH DIGGING TO THE NORTHEAST OVER EASTERN AUSTRALIA AND A SUBTROPICAL RIDGE EAST OF TC 15P HAS LEAD TO INCREASED VERTICAL WIND SHEAR. ADDITIONALLY, INCREASED GRADIENT FLOW ASSOCIATED WITH THESE FEATURES HAS LED TO AN ACCELERATION OF THE TRACK SPEED. THE MID TO UPPER LEVEL LOW HAS IMPINGED UPPER LEVEL OUTFLOW HALTING ADDITIONAL DEVELOPMENT. BASED ON THE INCREASE IN VERTICAL WIND SHEAR, DECREASED SST, INCREASED TRACK SPEED, AND THE DECREASE IN UPPER LEVEL OUTFLOW, FURTHER DEVELOPMENT OF THIS SYSTEM IS NOT EXPECTED, WITH ADDITIONAL WEAKENING AS TC 15P CONTINUES TO MOVE INTO EVEN LESS FAVORABLE ENVIRONMENTS. THIS IS THE FINAL WARNING ON THIS SYSTEM BY THE JOINT TYPHOON WARNING CENTER (NAVMARFCSTCEN). THE SYSTEM WILL BE CLOSELY MONITORED FOR SIGNS OF REGENERATION. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 180000Z IS 11 FEET.//
Tropical cyclone tracks developed by Michael Bath using operational warnings and advisories.
Document: tropical_cyclone_innis_jtwc_advisories.htm
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