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本帖最后由 Ragasa 于 2026-1-30 05:45 编辑
WTXS31 PGTW 292100
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE 19S (NINETEEN) WARNING NR 001//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/291221ZJAN2026//
AMPN/REF A IS A TROPICAL CYCLONE FORMATION ALERT.//
RMKS/
1. TROPICAL CYCLONE 19S (NINETEEN) 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:
291800Z --- NEAR 15.6S 42.5E
MOVEMENT PAST SIX HOURS - 090 DEGREES AT 02 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
RADIUS OF 034 KT WINDS - 060 NM NORTHEAST QUADRANT
055 NM SOUTHEAST QUADRANT
045 NM SOUTHWEST QUADRANT
045 NM NORTHWEST QUADRANT
REPEAT POSIT: 15.6S 42.5E
---
FORECASTS:
12 HRS, VALID AT:
300600Z --- 15.6S 43.0E
MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 030 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
010 NM SOUTHWEST QUADRANT
020 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 070 NM NORTHEAST QUADRANT
050 NM SOUTHEAST QUADRANT
040 NM SOUTHWEST QUADRANT
050 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 105 DEG/ 06 KTS
---
24 HRS, VALID AT:
301800Z --- 15.9S 44.2E
MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 030 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
030 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 070 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
050 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 125 DEG/ 08 KTS
---
36 HRS, VALID AT:
310600Z --- 16.8S 45.6E
MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 030 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
030 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 090 NM NORTHEAST QUADRANT
040 NM SOUTHEAST QUADRANT
040 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
VECTOR TO 48 HR POSIT: 130 DEG/ 11 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
311800Z --- 18.2S 47.5E
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
VECTOR TO 72 HR POSIT: 125 DEG/ 11 KTS
---
72 HRS, VALID AT:
011800Z --- 20.7S 51.3E
MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 060 NM NORTHEAST QUADRANT
070 NM SOUTHEAST QUADRANT
080 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
VECTOR TO 96 HR POSIT: 125 DEG/ 08 KTS
---
LONG RANGE OUTLOOK:
---
96 HRS, VALID AT:
021800Z --- 22.5S 53.9E
MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 020 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
030 NM SOUTHWEST QUADRANT
020 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 090 NM NORTHEAST QUADRANT
100 NM SOUTHEAST QUADRANT
080 NM SOUTHWEST QUADRANT
070 NM NORTHWEST QUADRANT
VECTOR TO 120 HR POSIT: 135 DEG/ 07 KTS
---
120 HRS, VALID AT:
031800Z --- 24.5S 56.1E
MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 064 KT WINDS - 000 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
030 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
RADIUS OF 050 KT WINDS - 030 NM NORTHEAST QUADRANT
060 NM SOUTHEAST QUADRANT
050 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 110 NM NORTHEAST QUADRANT
110 NM SOUTHEAST QUADRANT
090 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
---
REMARKS:
292100Z POSITION NEAR 15.6S 42.6E.
29JAN26. TROPICAL CYCLONE 19S (NINETEEN), LOCATED APPROXIMATELY
120 NM EAST-SOUTHEAST OF NACALA, MOZAMBIQUE, HAS TRACKED EASTWARD
AT 02 KNOTS OVER THE PAST SIX HOURS.
MINIMUM CENTRAL PRESSURE AT 291800Z IS 1001 MB. MAXIMUM
SIGNIFICANT WAVE HEIGHT AT 291800Z IS 15 FEET. NEXT WARNINGS AT
300900Z AND 302100Z.//
2. THIS CANCELS AND SUPERSEDES REF A (WTXS21 PGTW 291230).//
NNNN
- WDXS31 PGTW 292100
- MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
- SUBJ/PROGNOSTIC REASONING FOR TROPICAL CYCLONE 19S (NINETEEN) WARNING
- NR 001//
- RMKS/
- 1. FOR METEOROLOGISTS.
- 2. 6 HOUR SUMMARY AND ANALYSIS.
- SUMMARY:
- INITIAL POSITION: 15.6S 42.5E
- INITIAL INTENSITY: 35 KTS
- GEOGRAPHIC REFERENCE: 120 NM EAST-SOUTHEAST OF NACALA,
- MOZAMBIQUE
- MOVEMENT PAST 6 HOURS: EASTWARD AT 02 KTS
- SIGNIFICANT WAVE HEIGHT: 15 FEET
- SATELLITE ANALYSIS, INITIAL POSITION AND INTENSITY DISCUSSION:
- ANIMATED ENHANCED INFRARED (EIR) SATELLITE IMAGERY DEPICTS TROPICAL
- CYCLONE 19S AS A QUICKLY CONSOLIDATING SYSTEM WITH SPIRAL BANDS OF
- DEEP CONVECTION WRAPPING INTO THE CORE AND CIRRUS FILAMENTS
- ACCOMPANYING THE OUTFLOW. THE ENVIRONMENT IS HIGHLY FAVORABLE FOR
- DEVELOPMENT, CHARACTERIZED BY ROBUST EQUATORWARD AND POLEWARD OUTFLOW
- SUPPORTED BY THE TROUGH CENTERED TO THE SOUTHEAST AND A POINT SOURCE
- ALOFT NEAR THE CENTER, VERY WARM (29-30 C) SEA SURFACE TEMPERATURES,
- AND LOW (5-10 KTS) VERTICAL WIND SHEAR. 19S IS EXPECTED TO BE IN THE
- BEGINNING PHASES OF RAPID INTENSIFICATION (RI), GIVEN THE ENVIRONMENT
- AND THE QUICK CONSOLIDATION OF THE SYSTEM THUS FAR. THE INITIAL
- POSITION IS PLACED WITH MEDIUM CONFIDENCE BASED ON LOWER LEVEL CLOUD
- BANDING PRESENT IN ANIMATED EIR. THE INITIAL INTENSITY OF 35 KTS IS
- ASSESSED WITH MEDIUM CONFIDENCE BASED ON THE CIMSS OBJECTIVE ESTIMATE
- AND AGENCY DVORAK FIXES LISTED BELOW.
- INITIAL WIND RADII BASIS: PERSISTENCE
- CURRENT STEERING MECHANISM: THE SYSTEM IS IN A COMPETING STEERING
- ENVIRONMENT WITH A NEAR EQUATORIAL RIDGE (NER) TO THE NORTHEAST, A
- SUBTROPICAL RIDGE (STR) TO THE SOUTHWEST, AND A TROUGH CENTERED TO
- THE SOUTHEAST.
- AGENCY DVORAK AND AUTOMATED FIXES:
- PGTW: T2.5 - 35 KTS
- FMEE: T2.0 - 30 KTS
- CIMSS D-PRINT: 30 KTS AT 291900Z
- FORECASTER ASSESSMENT OF CURRENT ENVIRONMENT: HIGHLY FAVORABLE
- VWS: 5-10 KTS
- SST: 29-30 CELSIUS
- OUTFLOW: STRONG POLEWARD AND EQUATORWARD
- ANALYSIS CONFIDENCE:
- INITIAL POSITION: MEDIUM
- INITIAL INTENSITY: MEDIUM
- INITIAL WIND RADII: LOW
- 3. FORECAST REASONING.
- SIGNIFICANT FORECAST CHANGES: THIS INITIAL PROGNOSTIC REASONING
- MESSAGE ESTABLISHES THE FORECAST PHILOSOPHY.
- FORECAST DISCUSSION: TC 19S IS EXPECTED TO TRACK SLOWLY
- EAST-SOUTHEASTWARD UNTIL LANDFALL IN MADAGASCAR JUST AFTER TAU 24.
- 19S IS EMBEDDED WITHIN A COMPETING STEERING ENVIRONMENT,
- CHARACTERIZED BY A NEAR EQUATORIAL RIDGE (NER) TO THE NORTHEAST, A
- DEEP LAYER SUBTROPICAL RIDGE (STR) CENTERED OVER SOUTHERN AFRICA,
- AND A TROUGH CENTERED TO THE SOUTHEAST. AS 19S RAPIDLY INTENSIFIES
- WITHIN THE MOZAMBIQUE CHANNEL, THE GRADIENT FLOW BETWEEN THE STORM
- AND THE CLOSER NER WILL STRENGTHEN AND ALLOW THE NER TO ASSUME
- STEERING INFLUENCE OVER 19S BEGINNING AROUND TAU 24. THIS WILL ALSO
- RESULT IN AN INCREASE IN TRACK SPEED AND CAUSING 19S TO ''MOVE IT MOVE
- IT'' ACROSS MADAGASCAR. THE DEEP LAYER TROUGH IS FORECAST TO BREAK
- DOWN BETWEEN TAU 36-48, ALLOWING THE NER TO BUILD AND EXTEND FURTHER
- SOUTHEASTWARD. AROUND TAU 48, THE NER WILL MERGE WITH A BUILDING STR
- CURRENTLY LOCATED FAR TO THE SOUTHEAST OF 19S, CREATING A SINGLE LARGE
- RIDGING COMPLEX THAT WILL CAUSE 19S TO TRACK SOUTHEASTWARD THROUGH TAU
- 120. REGARDING INTENSITY, 19S IS FORECAST TO RI WITHIN THE MOZAMBIQUE
- CHANNEL AND MAKE LANDFALL AT OR STRONGER THAN 65KTS AFTER TAU 24. THE
- MOUNTAINOUS TERRAIN OF MADAGASCAR WILL SHRED THE LOWER LEVELS OF THE
- SYSTEM, CAUSING SIGNIFICANT WEAKENING FOR THE DURATION OF TIME 19S
- SPENDS OVER LAND. 19S IS FORECAST TO REEMERGE OVER WATER BETWEEN TAU
- 48-72, ENTERING INTO A SECOND HIGHLY FAVORABLE ENVIRONMENT WHERE IT IS
- EXPECTED TO QUICKLY RECONSOLIDATE WITH THE POTENTIAL FOR A SECOND
- ROUND OF RI. 19S IS CURRENTLY FORECAST TO STEADILY INTENSIFY
- THROUGH THE END OF THE FORECAST AT TAU 120.
- MODEL DISCUSSION: RELIABLE DETERMINISTIC TRACK GUIDANCE IS IN
- STRONG AGREEMENT IN THE NEAR-TERM TRACK FORECAST THROUGH TAU 36,
- WITH MINIMAL CROSS-TRACK AND ALONG-TRACK SPREAD. THE GUIDANCE
- ENVELOP WIDENS AS 19S TRACK OVER THE MOUNTAINS OF MADAGASCAR,
- SLIGHTLY INCREASING THE UNCERTAINTY FOR THE FORECAST THROUGH TAU
- 72. ALL MODELS ARE IN GOOD AGREEMENT THAT 19S WILL TRACK
- SOUTHEASTWARD ONCE REEMERGING OVER WATER AND MAINTAIN A
- SOUTHEASTWARD TRACK THOUGH THE REMAINDER OF THE FORECAST PERIOD,
- SUPPORTING THE JTWC LATE-TERM FORECAST WITH MEDIUM CONFIDENCE.
- INTENSITY GUIDANCE IS IN GOOD AGREEMENT IN A QUICK INTENSIFICATION
- BUT ALL DETERMINISTIC MODELS PREDICTS AN INTENSITY GREATER THAN 50 KTS
- PRIOR TO LANDFALL. THE RIDE RI MODEL IS THE ONLY GUIDANCE DEPICTING A
- PEAK INTENSITY ABOVE 50 KNOTS, REACHING AS HIGH AS 75 KNOTS. GIVEN THE
- HIGHLY FAVORABLE CONDITIONS DISCUSSED ABOVE, THE JTWC FORECAST
- DEVIATES FROM THE BULK OF THE GUIDANCE TO FORECAST FOR RI AND A PEAK
- INTENSITY OF 65 KTS PRIOR TO LANDFALL. THE INTENSITY GUIDANCE IS ALSO
- IN AGREEMENT IN A SIGNIFICANT WEAKENING OVER MADAGASCAR AND SUBSEQUENT
- RE-INTENSIFICATION. AS A RESULT, THE JTWC FORECAST IS PLACED WITH
- OVERALL MEDIUM CONFIDENCE.
- FORECAST CONFIDENCE:
- TRACK 00-72 HR: MEDIUM
- TRACK 72-120 HR: MEDIUM
- INTENSITY 00-72 HR: MEDIUM
- INTENSITY 72-120 HR: MEDIUM//
- NNNN
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