Tropical Cyclones
[Index] | Tropical Cyclone BERNARD : JTWC Advisories |
Season 2008-2009 Summaries (Operational Data): [AU] [SIO] [SPAC] [SH] | |
---> Tropical Cyclone BERNARD Track Map and Data |
WTXS21 PGTW 20081119 08:30z SUBJ/TROPICAL CYCLONE FORMATION ALERT// RMKS/ 1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN 200 NM EITHER SIDE OF A LINE FROM 9.8S 77.8E TO 11.4S 87.4E WITH- IN THE NEXT 12 TO 24 HOURS. AVAILABLE DATA DOES NOT JUSTIFY IS- SUANCE OF NUMBERED TROPICAL CYCLONE WARNINGS AT THIS TIME. WINDS IN THE AREA ARE ESTIMATED TO BE 25 TO 30 KNOTS. METSAT IMAGERY AT 190800Z INDICATES THAT A CIRCULATION CENTER IS LOCATED NEAR 10.2S 78.4E. THE SYSTEM IS MOVING SOUTHEASTWARD AT 05 KNOTS. 2. REMARKS: THE AREA OF CONVECTION PREVIOUSLY LOCATED NEAR 8.2S 78.1E IS NOW LOCATED NEAR 10.2S 78.4E, APPROXIMATELY 400 NM EAST-SOUTHEAST OF DIEGO GARCIA. ANIMATED MULTISPECTRAL SATELLITE IMAGERY INDICATES A VERY SMALL, CONSOLIDATING SYSTEM WITH DEEP CONVECTIVE BANDING WEST WRAPPING INTO THE NORTHERN QUADRANT. A 190247Z SSMIS IMAGE ALSO SUPPORTS A TIGHTENING LOW LEVEL CIRCULATION CENTER (LLCC) WITH GOOD CONVECTIVE BANDING OVER THE WESTERN SEMI-CIRCLE BUT WEAK DEEP CONV- ECTIVE BANDING OVER THE EASTERN SEMI-CIRCLE. ANIMATED WATER VAPOR IMAGERY DEPICTS FAIR POLEWARD OUTFLOW ENHANCED BY A MIDLATITUDE SHORTWAVE TROUGH WITH A GENERALLY FAVORABLE ENVIRONMENT AND THE OVERALL ENVIRONMENT IS FAVORABLE FOR FURTHER DEVELOPMENT WITH WEAK VERTICAL WIND SHEAR AND WARM SST. SCATTEROMETER DATA INDICATED A WELL-DEFINED LLCC WITH 25-30 KNOT WINDS. THEREFORE, MAXIMUM SUST- AINED 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 200830Z.// ========================================================================= WTXS32 PGTW 20081119 21:00z 1. TROPICAL CYCLONE 03S (THREE) WARNING NR 001 02 ACTIVE TROPICAL CYCLONES IN SOUTHIO MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 191800Z --- NEAR 9.7S 79.9E MOVEMENT PAST SIX HOURS - 085 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 WIND RADII VALID OVER OPEN WATER ONLY REPEAT POSIT: 9.7S 79.9E --- FORECASTS: 12 HRS, VALID AT: 200600Z --- 9.6S 82.1E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 090 DEG/ 14 KTS --- 24 HRS, VALID AT: 201800Z --- 9.5S 85.0E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 095 DEG/ 14 KTS --- 36 HRS, VALID AT: 210600Z --- 9.7S 87.8E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT VECTOR TO 48 HR POSIT: 095 DEG/ 16 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 211800Z --- 9.9S 91.1E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT --- REMARKS: 192100Z POSITION NEAR 9.7S 80.4E. TROPICAL CYCLONE (TC) 03S (THREE), LOCATED APPROXIMATELY 465 NM EAST- SOUTHEAST OF DIEGO GARCIA HAS TRACKED EASTWARD OVER THE PAST 06 HOURS. ANIMATED INFRARED IMAGERY SHOWS DEEP CONVECTION HAS DEVELOPED OVER A TIGHTLY WRAPPED LOW LEVEL CIRCULATION CENTER (LLCC). TC 03S HAS UNDERGONE SIGNIFICANT DEVELOPMENT OVER THE PAST 12 HOURS, WITH SATELLITE DVORAK INTENSITY ESTIMATES REACHING 2.5/2.5 (PGTW AND FMEE) AND 2.0/2.0 (KNES). THE TRACK FOR TC 03B HAS BEEN PREDOMINANTLY INFLUENCED BY LOW TO MID LEVEL TROUGHING TO THE SOUTH AND SOUTHWEST OF THE SYSTEM AND THE ITERACTION WITH CROSS EQUATORIAL FLOW TO THE NORTH. POOR UPPER LEVEL SUPPORT IN ASSOCIATION WITH MODERATE VERTICAL WIND SHEAR AND LESS THAN FAVORABLE SST'S WILL STIFFLE STRONG DEVELOPMENT OVER THE FORECAST PERIOD. THIS WARNING SUPERSEDES AND CANCELS REF A, NAVMARFCSTCEN 190821Z NOV 08 TROPICAL CYCLONE FORMATION ALERT (WTXS21 PGTW 190830) MAXIMUM SIGNIFICANT WAVE HEIGHT AT 191800Z IS 10 FEET. NEXT WARNINGS AT 200900Z AND 202100Z. REFER TO TROPICAL CYCLONE 02S (ANIKA) WARNINGS (WTXS31 PGTW) FOR TWELVE-HOURLY UPDATES.// ========================================================================= WTXS32 PGTW 20081120 09:00z MSGID/GENADMIN/NAVMARFCSTCEN PEARL HARBOR HI/JTWC// SUBJ/TROPICAL CYCLONE WARNING// REF/A/NAVMARFCSTCEN PEARL HARBOR HI/180921Z NOV 08// RMKS/ 1. TROPICAL CYCLONE 03S (THREE) WARNING NR 002 02 ACTIVE TROPICAL CYCLONES IN SOUTHIO MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 200600Z --- NEAR 9.8S 83.9E MOVEMENT PAST SIX HOURS - 095 DEGREES AT 20 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 WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 045 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 045 NM NORTHWEST QUADRANT REPEAT POSIT: 9.8S 83.9E --- FORECASTS: 12 HRS, VALID AT: 201800Z --- 9.8S 87.1E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 045 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 045 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 090 DEG/ 15 KTS --- 24 HRS, VALID AT: 210600Z --- 9.8S 90.2E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 045 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 045 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 090 DEG/ 15 KTS --- 36 HRS, VALID AT: 211800Z --- 9.9S 93.2E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 045 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 045 NM NORTHWEST QUADRANT VECTOR TO 48 HR POSIT: 095 DEG/ 15 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 220600Z --- 10.2S 96.3E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 045 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 045 NM NORTHWEST QUADRANT --- REMARKS: 200900Z POSITION NEAR 9.8S 84.7E. TROPICAL CYCLONE (TC) 03S (THREE), LOCATED APPROXIMATELY 780 NM WEST OF COCOS HAS TRACKED EASTWARD AT 20 KNOTS OVER THE PAST 06 HOURS. THE CYCLONE CONTINUES TO TRACK GENERALLY WESTWARD ALONG THE SOUTHERN PORTION OF THE NEAR EQUATORIAL RIDGE TO THE NORTH. ANIMATED WATER VAPOR IMAGERY SHOWS THAT POLEWARD OUTFLOW HAS IMPROVED SOMEWHAT AHEAD OF A BUILDING UPPER LEVEL TROUGH TO THE SOUTHWEST, HOWEVER, INCREASED VERTICAL WIND SHEAR HAS HINDERED INTENSITY GAINS. THE CURRENT INTENSITY OF 40 KNOTS IS BASED ON A 200102Z QUIKSCAT PASS INDICATING 30 KNOT UNFLAGGED, AND 40 KNOT FLAGGED WINDS NEAR THE CENTER, AS WELL AS SATELLITE INTENSITY ESTIMATES FROM PGTW AND FMEE RANGING FROM 35 TO 45 KNOTS. THE CYCLONE IS FORECAST TO CONTINUE TO TRACK GENERALLY WESTWARD, BUT AT A FASTER THAN PREVIOUSLY FORECASTED SPEED. THIS INCREASE IN TRACK SPEED IS A FUNCTION OF PERSISTENCE AND A BUILDING ISOTACH MAXIMUM AT THE 700 MB STEERING LEVEL. THE FORECAST TRACK IS SLIGHTLY FASTER AND TO THE SOUTH OF THE CONSENSUS OF AVAILABLE MODEL AIDS IN ORDER TO ACCOUNT FOR THE UNREALISTIC EGRR AND GFDN SOLUTIONS THAT DRIVE THE SYSTEM EQUATORWARD INTO THE NEAR EQUATORIAL RIDGE. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 200600Z IS 10 FEET. NEXT WARNINGS AT 202100Z AND 210900Z. REFER TO TROPICAL CYCLONE 02S (ANIKA) WARNINGS (WTXS31 PGTW) FOR TWELVE-HOURLY UPDATES.// ========================================================================= WTXS32 PGTW 20081120 21:00z MSGID/GENADMIN/NAVMARFCSTCEN PEARL HARBOR HI/JTWC// SUBJ/TROPICAL CYCLONE WARNING// 1. TROPICAL CYCLONE 03S (BERNARD) WARNING NR 003 02 ACTIVE TROPICAL CYCLONES IN SOUTHIO MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 201800Z --- NEAR 11.1S 89.2E MOVEMENT PAST SIX HOURS - 110 DEGREES AT 27 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER REPEAT POSIT: 11.1S 89.2E --- FORECASTS: 12 HRS, VALID AT: 210600Z --- 12.8S 93.6E MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 24 HR POSIT: 120 DEG/ 28 KTS --- 24 HRS, VALID AT: 211800Z --- 15.6S 98.5E MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 202100Z POSITION NEAR 11.5S 90.3E. TROPICAL CYCLONE (TC) 03S (THREE), LOCATED APPROXIMATELY 620 NM WEST OF COCOS ISLAND HAS TRACKED EAST-SOUTHEASTWARD AT 27 KNOTS OVER THE PAST 06 HOURS. INCREASED INTERACTION WITH A LOW TO MID LEVEL TROUGH TO THE SOUTHWEST AND A NEAR EQUATORIAL RIDGE EXTENSION NORTHEAST OF THE SYSTEM HAS DOMINATED THE STEERING INFLUENCES FOR TC 03S. THEY HAVE LED TO A CONTINUED INCREASE IN TRACK SPEED OVER THE PAST 12 HOURS. THE SYSTEM HAS MOVED POLEWARD OF AN UPPER LEVEL NEAR EQUA- TORIAL RIDGE WHICH HAS LED TO A DECOUPLING OF THE CONVECTION AND THE LOW LEVEL CIRCULATION CENTER (LLCC). INCREASING VERTICAL WIND SHEAR AND DECREASING SST'S HAS WEAKENED TC 03S. THE REMINANTS OF THE LLCC WILL CONTINUE TO TRACK EAST-SOUTHEAST, AND DUE TO THE CONTINUED UNFAVORABLE ENVIRONMENT TC 03S IS TRACKING INTO, REDEVELOPMENT IS UNLIKELY. 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 201800Z IS 8 FEET. REFER TO TROPICAL CYCLONE 02S (ANIKA) WARNINGS (WTXS31 PGTW) FOR TWELVE-HOURLY UPDATES.//
Tropical cyclone tracks developed by Michael Bath using operational warnings and advisories.
Document: tropical_cyclone_bernard_jtwc_advisories.htm
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