Tropical Cyclones
[Index] | Tropical Cyclone 201101 : JTWC Advisories |
Season 2010-2011 Summaries (Operational Data): [AU] [SIO] [SPAC] [SH] | |
---> Tropical Cyclone 201101 Track Map and Data |
WTXS21 PGTW 20101025 23:00z MSGID/GENADMIN/NAVMARFCSTCEN PEARL HARBOR HI/JTWC// SUBJ/TROPICAL CYCLONE FORMATION ALERT// RMKS/ 1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN A 180 NM RADIUS OF 9.6S 86.3E WITHIN THE NEXT 12 TO 24 HOURS. AVAILABLE DATA DOES NOT JUSTIFY ISSUANCE OF NUMBERED TROPICAL CY- CLONE WARNINGS AT THIS TIME. WINDS IN THE AREA ARE ESTIMATED TO BE 25 TO 30 KNOTS. METSAT IMAGERY AT 252251Z INDICATES THAT A CIRCULATION CENTER IS LOCATED NEAR 9.6S 86.4E. THE SYSTEM IS MOVING SOUTH-SOUTHEASTWARD AT 03 KNOTS. 2. REMARKS:2. REMARKS: THE AREA OF CONVECTION PREVIOUSLY LOCATED NEAR 10.0S 86.1E IS NOW LOCATED NEAR 9.6S 86.4E, APPROXIMATELY 835 NM EAST OF DIEGO GARCIA. ANIMATED INFRARED SATELLITE IMAGERY INDICATES THAT VERTICAL WIND SHEAR (VWS) OVER THE LOW LEVEL CIRCULATION CENTER (LLCC) IS EASING AND CONVECTION IS CONSOLIDATING. A 251943Z AMSR-E 36GHZ IMAGE DEPICTS CONVECTIVE BANDING ORGANIZING AND EMCOMPASSING ALL BUT THE EASTERN PORTION OF THE LLCC. THE LLCC IS LOCATED UNDER DIFFLUENT EASTERLY FLOW NORTH OF THE SUBTROPICAL RIDGE AXIS. VWS IS EXPECTED TO DECREASE OVER THE SHORT TERM AS THE LLCC DRIFTS SOUTHWARD. MODEL GUIDANCE INDICATES THE SYSTEM WILL BE DRIVEN WESTWARD BY A BUILDING LOW-LEVEL STEERING RIDGE AFTER TAU 24. A 251523Z ASCAT IMAGE SHOWED NUMEROUS 30 KNOT WIND VECTORS NEAR THE CENTER. 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 IS GOOD. 3. THIS ALERT WILL BE REISSUED, UPGRADED TO WARNING OR CANCELLED BY 262300Z. ========================================================================= WTXS31 PGTW 20101026 15:00z MSGID/GENADMIN/NAVMARFCSTCEN PEARL HARBOR HI/JTWC// SUBJ/TROPICAL CYCLONE 01S (ONE) WARNING NR 001// REF/A/NAVMARFCSTCEN PEARL HARBOR HI/252251Z OCT 10// AMPN/TROPICAL CYCLONE FORMATION ALERT// RMKS/ 1. TROPICAL CYCLONE 01S (ONE) WARNING NR 001 01 ACTIVE TROPICAL CYCLONE IN SOUTHIO MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 261200Z --- NEAR 10.9S 86.4E MOVEMENT PAST SIX HOURS - 180 DEGREES AT 07 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: 10.9S 86.4E --- FORECASTS: 12 HRS, VALID AT: 270000Z --- 12.3S 85.9E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 045 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 045 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 235 DEG/ 07 KTS --- 24 HRS, VALID AT: 271200Z --- 13.1S 84.8E MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 045 NM NORTHEAST QUADRANT 050 NM SOUTHEAST QUADRANT 045 NM SOUTHWEST QUADRANT 050 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 245 DEG/ 09 KTS --- 36 HRS, VALID AT: 280000Z --- 13.8S 83.1E MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 045 NM NORTHEAST QUADRANT 050 NM SOUTHEAST QUADRANT 045 NM SOUTHWEST QUADRANT 050 NM NORTHWEST QUADRANT VECTOR TO 48 HR POSIT: 255 DEG/ 10 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 281200Z --- 14.4S 81.1E MAX SUSTAINED WINDS - 050 KT, GUSTS 065 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 055 NM NORTHWEST QUADRANT VECTOR TO 72 HR POSIT: 255 DEG/ 09 KTS --- 72 HRS, VALID AT: 291200Z --- 15.2S 77.4E MAX SUSTAINED WINDS - 050 KT, GUSTS 065 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 055 NM NORTHWEST QUADRANT VECTOR TO 96 HR POSIT: 265 DEG/ 10 KTS --- LONG RANGE OUTLOOK: NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 250 NM ON DAY 4 AND 350 NM ON DAY 5... AND FOR INTENSITY NEAR 20 KT EACH DAY. --- 96 HRS, VALID AT: 301200Z --- 15.5S 73.2E MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT WIND RADII VALID OVER OPEN WATER ONLY VECTOR TO 120 HR POSIT: 275 DEG/ 09 KTS --- 120 HRS, VALID AT: 311200Z --- 15.0S 69.4E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY --- REMARKS: 261500Z POSITION NEAR 11.3S 86.3E. TROPICAL CYCLONE (TC) 01S (ONE), LOCATED APPROXIMATELY 850 NM EAST- SOUTHEAST OF DIEGO GARCIA, HAS TRACKED SOUTHWARD AT 07 KNOTS OVER THE PAST SIX HOURS. THIS IS THE FIRST SYSTEM OF THE 2011 SOUTHERN HEMISPHERE TROPICAL CYCLONE SEASON. VERTICAL WIND SHEAR (VWS) HAS RELAXED OVER THE SYSTEM AND HAS ALLOWED FOR DEEP CONVECTION TO BUILD BACK OVER THE CENTER, ELEVATING DVORAK ESTIMATES FROM PGTW AND FMEE TO A T2.5 OR 35 KNOTS. A 260407Z ASCAT PASS ALSO SUGGESTS THE LLCC HAS STRENGTHENED TO 35 KNOTS. IN ADDITION, A 261112Z SSMI 37H MICROWAVE IMAGE SHOWS PRONOUNCED LOW LEVEL BANDING WRAPPING INTO A DISTINCT LLCC. CURRENTLY THE CYCLONE IS VENTING TO THE WEST AND SOUTHEAST AHEAD OF A LONGWAVE UPPER LEVEL TROUGH. THIS TROUGH ALSO APPEARS RESPONSIBLE FOR BOUTS OF ELEVATED VWS. LESS THAN SIX HOURS AGO THE LLCC HAD BEEN FULLY EXPOSED TO THE EAST OF THE DEEP CONVECTION. SLOW INTENSIFICATION IS ANTICIPATED OVER THE NEXT FEW DAYS AS VWS GRADUALLY EASES WITH THE PASSAGE OF THE TROUGH DOWNSTREAM. THE SYSTEM WILL CONTINUE TO TRACK ALONG THE NORTHERN PERIPHERY OF A LOW TO MID-LEVEL STEERING RIDGE TO THE SOUTH, THEN TRANSFER TO ANOTHER STEERING RIDGE FURTHER TO THE WEST AS THE MID- LEVEL REFLECTION OF THE TROUGH PASSES AROUND TAU 48. VWS IS AGAIN EXPECTED TO ELEVATE NEAR DAY 4 AND WILL SLOWLY WEAKEN THE SYSTEM. SEA SURFACE TEMPERATURES REMAIN FAVORABLE THROUGHOUT THE FORECAST AND BEGIN TO TAPER NEAR 20S. THIS WARNING SUPERSEDES AND CANCELS REF A, NAVMARFCSTCEN 252251Z OCT 10 TROPICAL CYCLONE FORMATION ALERT (WTXS21 PGTW 252300)MAXIMUM SIGNIFICANT WAVE HEIGHT AT 261200Z IS 9 FEET. NEXT WARNINGS AT 270300Z AND 271500Z.// ========================================================================= WTXS31 PGTW 20101027 03:00z MSGID/GENADMIN/NAVMARFCSTCEN PEARL HARBOR HI/JTWC// SUBJ/TROPICAL CYCLONE 01S (ONE) WARNING NR 002// RMKS/ 1. TROPICAL CYCLONE 01S (ONE) WARNING NR 002 01 ACTIVE TROPICAL CYCLONE IN SOUTHIO MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 270000Z --- NEAR 11.7S 85.8E MOVEMENT PAST SIX HOURS - 225 DEGREES AT 06 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: 11.7S 85.8E --- FORECASTS: 12 HRS, VALID AT: 271200Z --- 12.7S 84.6E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 045 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 045 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 245 DEG/ 09 KTS --- 24 HRS, VALID AT: 280000Z --- 13.4S 83.0E MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 045 NM NORTHEAST QUADRANT 050 NM SOUTHEAST QUADRANT 045 NM SOUTHWEST QUADRANT 050 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 250 DEG/ 09 KTS --- 36 HRS, VALID AT: 281200Z --- 14.0S 81.3E MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 045 NM NORTHEAST QUADRANT 050 NM SOUTHEAST QUADRANT 045 NM SOUTHWEST QUADRANT 050 NM NORTHWEST QUADRANT VECTOR TO 48 HR POSIT: 250 DEG/ 11 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 290000Z --- 14.7S 79.2E MAX SUSTAINED WINDS - 050 KT, GUSTS 065 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 055 NM NORTHWEST QUADRANT VECTOR TO 72 HR POSIT: 260 DEG/ 10 KTS --- 72 HRS, VALID AT: 300000Z --- 15.3S 75.0E 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 055 NM NORTHWEST QUADRANT VECTOR TO 96 HR POSIT: 275 DEG/ 10 KTS --- LONG RANGE OUTLOOK: NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 250 NM ON DAY 4 AND 350 NM ON DAY 5... AND FOR INTENSITY NEAR 20 KT EACH DAY. --- 96 HRS, VALID AT: 310000Z --- 14.9S 71.0E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY VECTOR TO 120 HR POSIT: 280 DEG/ 11 KTS --- 120 HRS, VALID AT: 010000Z --- 14.2S 66.5E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY --- REMARKS: 270300Z POSITION NEAR 12.0S 85.5E. TROPICAL CYCLONE (TC) 01S (ONE), LOCATED APPROXIMATELY 830 NM EAST- SOUTHEAST OF DIEGO GARCIA, HAS TRACKED SOUTHWESTWARD AT 06 KNOTS OVER THE PAST SIX HOURS. ANIMATED MULTISPECTRAL SATELLITE IMAGERY DEPICTS TIGHTLY CURVED BANDING WRAPPING INTO A WELL DEFINED LOW LEVEL CIRCULATION CENTER (LLCC), WITH A MAJORITY OF THE DEEP CONVECTION ALONG THE WESTERN PERIPHERY OF THE SYSTEM. UPPER LEVEL ANALYSIS INDICATES STRONG DIFFLUENCE ALOFT AND CONTINUED VENTING TO THE WEST AND SOUTHEAST AHEAD OF A LONG WAVE UPPER LEVEL TROUGH. THE SYSTEM IS EXPERIENCING MODERATE (20 TO 25 KNOTS) EASTERLY VERTICAL WIND SHEAR (VWS), WHICH IS CURRENTLY LIMITING INTENSIFICATION. TC 01S IS TRACKING ALONG THE NORTHWESTERN PERIPHERY OF A LOW TO MID- LEVEL STEERING RIDGE, WHICH IS FORECAST TO WEAKEN NEAR TAU 36 DUE TO AN APPROACHING UPPER LEVEL TROUGH. AFTER TAU 36, THE STR IS FORECAST TO REBUILD TO THE WEST AND TC 01S WILL TRACK GENERALLY WESTWARD ALONG 15S. TC 01S IS FORECAST TO STEADILY INTENSIFY THROUGHOUT THE FORECAST PERIOD, BUT WILL ULTIMATELY BE LIMITED BY DECREASED SST SOUTH OF 12S AND INCREASING VERTICAL WIND SHEAR ASSOCIATED WITH THE TRANSITORY UPPER LEVEL TROUGH. NUMERICAL MODEL GUIDANCE IS IN FAIR AGREEMENT THROUGH THE EARLY TAUS, WITH THE EXCEPTION OF WBAR WHICH DRIVES THE SYSTEM SOUTHWARD INTO THE RIDGE. MODEL GUIDANCE IS INDICATING SOME SPREAD IN THE LATER TAUS ASSOCIATED WITH THE TIMING OF THE PASSING UPPER LEVEL TROUGH. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 270000Z IS 12 FEET. NEXT WARNINGS AT 271500Z AND 280300Z.// ========================================================================= WTXS31 PGTW 20101027 09:00z MSGID/GENADMIN/NAVMARFCSTCEN PEARL HARBOR HI/JTWC// SUBJ/TROPICAL CYCLONE 01S (ONE) WARNING NR 003// RMKS/ 1. TROPICAL CYCLONE 01S (ONE) WARNING NR 003 01 ACTIVE TROPICAL CYCLONE IN SOUTHIO MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 270600Z --- NEAR 12.2S 85.5E MOVEMENT PAST SIX HOURS - 210 DEGREES AT 06 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: 12.2S 85.5E --- FORECASTS: 12 HRS, VALID AT: 271800Z --- 13.2S 84.1E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 045 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 035 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 245 DEG/ 09 KTS --- 24 HRS, VALID AT: 280600Z --- 14.0S 82.5E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY 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: 245 DEG/ 10 KTS --- 36 HRS, VALID AT: 281800Z --- 14.8S 80.5E MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 045 NM NORTHEAST QUADRANT 050 NM SOUTHEAST QUADRANT 045 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT VECTOR TO 48 HR POSIT: 250 DEG/ 10 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 290600Z --- 15.4S 78.5E 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 72 HR POSIT: 260 DEG/ 10 KTS --- 72 HRS, VALID AT: 300600Z --- 16.0S 74.6E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 045 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 035 NM NORTHWEST QUADRANT VECTOR TO 96 HR POSIT: 275 DEG/ 10 KTS --- LONG RANGE OUTLOOK: NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 250 NM ON DAY 4 AND 350 NM ON DAY 5... AND FOR INTENSITY NEAR 20 KT EACH DAY. --- 96 HRS, VALID AT: 310600Z --- 15.5S 70.4E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY VECTOR TO 120 HR POSIT: 285 DEG/ 11 KTS --- 120 HRS, VALID AT: 010600Z --- 14.5S 66.1E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY --- REMARKS: 270900Z POSITION NEAR 12.5S 85.1E. TROPICAL CYCLONE (TC) 01S (ONE), LOCATED APPROXIMATELY 825 NM EAST- SOUTHEAST OF DIEGO GARCIA, HAS TRACKED SOUTH-SOUTHWESTWARD AT 06 KNOTS OVER THE PAST SIX HOURS. THE SYSTEM IS CURRENTLY TRACKING ALONG THE NORTHWESTERN PERIPHERY OF THE LOW TO MID-LEVEL STEERING RIDGE TO THE SOUTHEAST. THE TRACK WILL FLATTEN TO THE WEST ONCE A MID-LEVEL TROUGH PASSES DOWNSTREAM AND THE STEERING RIDGE STRENGTHENS TO THE SOUTH OF THE SYSTEM. DVORAK ESTIMATES FROM PGTW AND FMEE CONTINUE TO SUPPORT A 35 KNOT SYSTEM. LOW TO MODERATE VERTICAL WIND SHEAR HAVE HINDERED INTENSIFICATION DESPITE DUAL OUTFLOW MECHANISMS ALOFT. SEA SURFACE TEMPERATURES BEGIN TO COOL SOUTH OF 15S AND WILL ULTIMATELY MODERATE INTENSIFICATION, ALONG WITH INCREASED VERTICAL WIND SHEAR, THROUGHOUT THE FORECAST. THE FORECAST TRACK REMAINS CONSISTENT WITH THE PREVIOUS FORECAST AND THE LATEST MODEL CONSENSUS. NEXT WARNINGS AT 272100Z AND 280900Z.// ========================================================================= WTXS31 PGTW 20101027 09:00z MSGID/GENADMIN/NAVMARFCSTCEN PEARL HARBOR HI/JTWC// SUBJ/TROPICAL CYCLONE 01S (ONE) WARNING NR 003// RMKS/ 1. TROPICAL CYCLONE 01S (ONE) WARNING NR 003 01 ACTIVE TROPICAL CYCLONE IN SOUTHIO MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 270600Z --- NEAR 12.2S 85.5E MOVEMENT PAST SIX HOURS - 210 DEGREES AT 06 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: 12.2S 85.5E --- FORECASTS: 12 HRS, VALID AT: 271800Z --- 13.2S 84.1E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 045 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 035 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 245 DEG/ 09 KTS --- 24 HRS, VALID AT: 280600Z --- 14.0S 82.5E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY 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: 245 DEG/ 10 KTS --- 36 HRS, VALID AT: 281800Z --- 14.8S 80.5E MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 045 NM NORTHEAST QUADRANT 050 NM SOUTHEAST QUADRANT 045 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT VECTOR TO 48 HR POSIT: 250 DEG/ 10 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 290600Z --- 15.4S 78.5E 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 72 HR POSIT: 260 DEG/ 10 KTS --- 72 HRS, VALID AT: 300600Z --- 16.0S 74.6E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 045 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 035 NM NORTHWEST QUADRANT VECTOR TO 96 HR POSIT: 275 DEG/ 10 KTS --- LONG RANGE OUTLOOK: NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 250 NM ON DAY 4 AND 350 NM ON DAY 5... AND FOR INTENSITY NEAR 20 KT EACH DAY. --- 96 HRS, VALID AT: 310600Z --- 15.5S 70.4E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY VECTOR TO 120 HR POSIT: 285 DEG/ 11 KTS --- 120 HRS, VALID AT: 010600Z --- 14.5S 66.1E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY --- REMARKS: 270900Z POSITION NEAR 12.5S 85.1E. TROPICAL CYCLONE (TC) 01S (ONE), LOCATED APPROXIMATELY 825 NM EAST- SOUTHEAST OF DIEGO GARCIA, HAS TRACKED SOUTH-SOUTHWESTWARD AT 06 KNOTS OVER THE PAST SIX HOURS. THE SYSTEM IS CURRENTLY TRACKING ALONG THE NORTHWESTERN PERIPHERY OF THE LOW TO MID-LEVEL STEERING RIDGE TO THE SOUTHEAST. THE TRACK WILL FLATTEN TO THE WEST ONCE A MID-LEVEL TROUGH PASSES DOWNSTREAM AND THE STEERING RIDGE STRENGTHENS TO THE SOUTH OF THE SYSTEM. DVORAK ESTIMATES FROM PGTW AND FMEE CONTINUE TO SUPPORT A 35 KNOT SYSTEM. LOW TO MODERATE VERTICAL WIND SHEAR HAVE HINDERED INTENSIFICATION DESPITE DUAL OUTFLOW MECHANISMS ALOFT. SEA SURFACE TEMPERATURES BEGIN TO COOL SOUTH OF 15S AND WILL ULTIMATELY MODERATE INTENSIFICATION, ALONG WITH INCREASED VERTICAL WIND SHEAR, THROUGHOUT THE FORECAST. THE FORECAST TRACK REMAINS CONSISTENT WITH THE PREVIOUS FORECAST AND THE LATEST MODEL CONSENSUS. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 270600Z IS 15 FEET. NEXT WARNINGS AT 272100Z AND 280900Z.// ========================================================================= WTXS31 PGTW 20101027 21:00z MSGID/GENADMIN/NAVMARFCSTCEN PEARL HARBOR HI/JTWC// SUBJ/TROPICAL CYCLONE 01S (ONE) WARNING NR 004// RMKS/ 1. TROPICAL CYCLONE 01S (ONE) WARNING NR 004 01 ACTIVE TROPICAL CYCLONE IN SOUTHIO MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 271800Z --- NEAR 12.7S 83.9E MOVEMENT PAST SIX HOURS - 255 DEGREES AT 08 KTS POSITION ACCURATE TO WITHIN 040 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: 12.7S 83.9E --- FORECASTS: 12 HRS, VALID AT: 280600Z --- 13.5S 82.3E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY VECTOR TO 24 HR POSIT: 245 DEG/ 11 KTS --- 24 HRS, VALID AT: 281800Z --- 14.4S 80.3E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 035 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 250 DEG/ 10 KTS --- 36 HRS, VALID AT: 290600Z --- 15.1S 78.3E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 035 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT VECTOR TO 48 HR POSIT: 255 DEG/ 09 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 291800Z --- 15.5S 76.5E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 035 NM SOUTHEAST QUADRANT 035 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT VECTOR TO 72 HR POSIT: 275 DEG/ 09 KTS --- 72 HRS, VALID AT: 301800Z --- 15.3S 72.9E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 96 HR POSIT: 285 DEG/ 10 KTS --- LONG RANGE OUTLOOK: NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 250 NM ON DAY 4 AND 350 NM ON DAY 5... AND FOR INTENSITY NEAR 20 KT EACH DAY. --- 96 HRS, VALID AT: 311800Z --- 14.4S 68.9E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 272100Z POSITION NEAR 12.9S 83.5E. TROPICAL CYCLONE (TC) 01S (ONE), LOCATED APPROXIMATELY 750 NM EAST- SOUTHEAST OF DIEGO GARCIA, HAS TRACKED WEST-SOUTHWESTWARD AT 08 KNOTS OVER THE PAST SIX HOURS. ANIMATED INFRARED SATELLITE IMAGERY INDICATES AN OVERALL WEAKENING IN THE DEEP CONVECTION ASSOCIATED WITH TC 01S. DVORAK ESTIMATES FROM PGTW AND FMEE HAVE INDICATED A WEAKENING TREND OVER THE PAST 12 HOURS AND CURRENTLY SUPPORT A 25 TO 35 KNOT SYSTEM. A 271621Z ASCAT PASS SHOWS 20 TO 25 KNOT WINDS ALONG THE NORTHWESTERN QUADRANT OF THE SYSTEM AND 30 TO 35 KNOT WINDS ALONG THE SOUTHEASTERN QUADRANT. THE SYSTEM IS CURRENTLY TRACKING ALONG THE NORTHWESTERN PERIPHERY OF A LOW TO MID-LEVEL STEERING RIDGE TO THE SOUTHEAST. TC 01S IS FORECAST TO INTENSIFY SLIGHTLY AS THE UPPER LEVEL ENVIRONMENT (DECREASED VERTICAL WIND SHEAR) IMPROVES TO THE SOUTH. THE TRACK WILL FLATTEN TO THE WEST ONCE A MID-LEVEL TROUGH PASSES DOWNSTREAM ALLOWING THE STEERING RIDGE TO STRENGTHEN TO THE SOUTH OF THE SYSTEM. MODERATE VERTICAL WIND SHEAR AND DECREASING SEA SURFACE TEMPERATURES SOUTH OF 15S WILL ULTIMATELY MODERATE INTENSIFICATION THROUGHOUT THE FORECAST AND LEAD TO DISSIPATION OF TC 01S AS A SIGNIFICANT TROPICAL CYCLONE BY TAU 96. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 271800Z IS 16 FEET. NEXT WARNINGS AT 280900Z AND 282100Z.// ========================================================================= WTXS31 PGTW 20101028 09:00z MSGID/GENADMIN/NAVMARFCSTCEN PEARL HARBOR HI/JTWC// SUBJ/TROPICAL CYCLONE 01S (ONE) WARNING NR 005// RMKS/ 1. TROPICAL CYCLONE 01S (ONE) WARNING NR 005 01 ACTIVE TROPICAL CYCLONE IN SOUTHIO MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 280600Z --- NEAR 13.4S 81.8E MOVEMENT PAST SIX HOURS - 260 DEGREES AT 14 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY A COMBINATION OF SATELLITE AND EXTRAPOLATION PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER REPEAT POSIT: 13.4S 81.8E --- FORECASTS: 12 HRS, VALID AT: 281800Z --- 13.7S 80.0E MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 280900Z POSITION NEAR 13.5S 81.3E. TROPICAL CYCLONE 01S, LOCATED APPROXIMATELY 650 NM EAST-SOUTHEAST OF DIEGO GARCIA, HAS TRACKED WESTWARD AT 14 KNOTS OVER THE PAST SIX HOURS. ANIMATED MULTISPECTRAL IMAGERY SHOWS THE CONVECTION HAS GREATLY DECREASED AND SHEARED TO THE SOUTHWEST, EXPOSING A LOW LEVEL CIRCULATION CENTER THAT REMAINS FAIRLY DEFINED. UPPER LEVEL ANALYSIS INDICATES THE SYSTEM IS APPROXIMATELY TEN DEGREES TO THE NORTH OF THE SUBTROPICAL RIDGE AXIS IN AN AREA OF MODERATE VERTICAL WIND SHEAR. THE SYSTEM IS EXPECTED TO CONTINUE TRACKING WESTWARD ALONG THE NORTHERN PERIPHERY OF THE STEERING RIDGE TO THE NORTH, AND DISSIPATE AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER WITHIN 12 HOURS. 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 280600Z IS 13 FEET.//
Tropical cyclone tracks developed by Michael Bath using operational warnings and advisories.
Document: tropical_cyclone_201101_jtwc_advisories.htm
Updated: 17 June 2020 [Australian Severe Weather index] [Copyright Notice] [Email Contacts] [Search This Site] [Privacy Policy] |