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本帖最后由 ygsj24 于 2026-1-1 06:00 编辑
WTXS31 PGTW 312100
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE 11S (ELEVEN) WARNING NR 001//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/311321ZDEC2025//
AMPN/REF A IS A TROPICAL CYCLONE FORMATION ALERT.//
RMKS/
1. TROPICAL CYCLONE 11S (ELEVEN) WARNING NR 001
02 ACTIVE TROPICAL CYCLONES IN SOUTHIO
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
311800Z --- NEAR 11.2S 106.3E
MOVEMENT PAST SIX HOURS - 140 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
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 100 NM NORTHEAST QUADRANT
080 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
080 NM NORTHWEST QUADRANT
REPEAT POSIT: 11.2S 106.3E
---
FORECASTS:
12 HRS, VALID AT:
010600Z --- 12.6S 108.0E
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT
080 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
080 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 130 DEG/ 09 KTS
---
24 HRS, VALID AT:
011800Z --- 13.8S 109.4E
MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT
080 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
080 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 130 DEG/ 06 KTS
---
36 HRS, VALID AT:
020600Z --- 14.6S 110.4E
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT
080 NM SOUTHEAST QUADRANT
040 NM SOUTHWEST QUADRANT
080 NM NORTHWEST QUADRANT
VECTOR TO 48 HR POSIT: 140 DEG/ 03 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
021800Z --- 15.1S 110.8E
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT
090 NM SOUTHEAST QUADRANT
040 NM SOUTHWEST QUADRANT
080 NM NORTHWEST QUADRANT
VECTOR TO 72 HR POSIT: 240 DEG/ 04 KTS
---
72 HRS, VALID AT:
031800Z --- 15.9S 109.3E
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 - 060 NM NORTHEAST QUADRANT
090 NM SOUTHEAST QUADRANT
030 NM SOUTHWEST QUADRANT
080 NM NORTHWEST QUADRANT
VECTOR TO 96 HR POSIT: 255 DEG/ 08 KTS
---
LONG RANGE OUTLOOK:
---
96 HRS, VALID AT:
041800Z --- 16.7S 106.0E
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
---
REMARKS:
312100Z POSITION NEAR 11.6S 106.7E.
31DEC25. TROPICAL CYCLONE 11S (ELEVEN), LOCATED APPROXIMATELY 555
NM EAST OF THE COCOS ISLANDS, HAS TRACKED SOUTHEASTWARD AT 09
KNOTS OVER THE PAST SIX HOURS.
MINIMUM CENTRAL PRESSURE AT 311800Z IS 1000 MB. MAXIMUM
SIGNIFICANT WAVE HEIGHT AT 311800Z IS 15 FEET.
NEXT WARNINGS AT 010300Z, 010900Z, 011500Z, AND 012100Z.
REFER TO TROPICAL CYCLONE 09S (GRANT) WARNINGS (WTXS32 PGTW)
FOR TWELVE-HOURLY UPDATES.
2. THIS CANCELS AND SUPERSEDES REF A (WTXS21 PGTW 311330).//
NNNN
- WDXS31 PGTW 312100
- MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
- SUBJ/PROGNOSTIC REASONING FOR TROPICAL CYCLONE 11S (ELEVEN) WARNING NR
- 001//
- RMKS/
- 1. FOR METEOROLOGISTS.
- 2. 6 HOUR SUMMARY AND ANALYSIS.
- SUMMARY:
- INITIAL POSITION: 11.2S 106.3E
- INITIAL INTENSITY: 35 KTS
- GEOGRAPHIC REFERENCE: 555 NM EAST OF THE COCOS ISLANDS
- MOVEMENT PAST 6 HOURS: SOUTHEASTWARD AT 09 KTS
- SIGNIFICANT WAVE HEIGHT: 15 FEET
- SATELLITE ANALYSIS, INITIAL POSITION AND INTENSITY DISCUSSION:
- ANIMATED ENHANCED INFRARED (EIR) SATELLITE IMAGERY DEPICTS TROPICAL
- CYCLONE 11S WITH IMPROVED PERSISTENT CENTRAL CONVECTION THAT IS NOW
- CONFINED TO A SMALL POCKET OVER THE LOW-LEVEL CIRCULATION CENTER
- (LLCC). CLOUD TOPS WITHIN THE ENVIRONMENTAL ANALYSIS INDICATES THAT
- 11S IS IN A MARGINALLY FAVORABLE ENVIRONMENT CHARACTERIZED BY
- MODERATE POLEWARD OUTFLOW ALOFT, LOW (10-15 KTS) VERTICAL WIND
- SHEAR, AND WARM (28-29 C) SEA SURFACE TEMPERATURES. THE INITIAL
- POSITION IS PLACED WITH MEDIUM CONFIDENCE BASED ON THE ANIMATED EIR
- IMAGERY. THE INITIAL INTENSITY OF 35 KTS IS ASSESSED WITH MEDIUM
- CONFIDENCE BASED ON THE PGTW FIX OF T2.0 AND AN EARLY CIMSS DPRINT
- ESTIMATE OF 33 KTS. ADDITIONALLY, A PARTIAL 311444Z METOP-C ASCAT
- PASS SHOWED 30-35 KTS WITHIN THE EASTERN PERIPHERY.
- INITIAL WIND RADII BASIS: SCATTEROMETER DATA
- CURRENT STEERING MECHANISM: EASTERN PERIPHERY OF A LOW TO MID-LEVEL
- NEAR-EQUATORIAL RIDGE (NER) POSITIONED TO THE WEST.
- AGENCY DVORAK AND AUTOMATED FIXES:
- PGTW: T2.0 - 30 KTS
- CIMSS D-PRINT: 33 KTS AT 312000Z
- FORECASTER ASSESSMENT OF CURRENT ENVIRONMENT: MARGINALLY FAVORABLE
- VWS: 10-15 KTS
- SST: 28-29 CELSIUS
- OUTFLOW: MODERATE POLEWARD
- 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 11S IS FORECAST TO TRACK SOUTHEASTWARD,
- ALONG THE EASTERN PERIPHERY OF THE LOW TO MID-LEVEL NER TO THE WEST
- THROUGH TAU 48. NEAR TAU 48, THE STEERING MECHANISM WILL SWITCH TO A
- LARGE SUBTROPICAL RIDGE TO THE SOUTH OF THE SYSTEM, CAUSING 11S TO
- TURN SHARPLY WESTWARD. A WESTWARD TRACK IS THEN EXPECTED TO PERSIST
- THROUGH THE REMAINDER OF THE FORECAST PERIOD. IN TERMS OF
- INTENSITY, 11S IS FORECAST TO GRADUALLY INTENSIFY THROUGH TAU 36 AS
- SHEAR REMAINS LOW. NEAR TAU 36, NORTHWESTERLY SHEAR IS EXPECTED TO
- QUICKLY INCREASE TO OVER 20 KTS, CAUSING 11S TO WEAKEN AS IT MAKES
- THE WESTWARD TURN. IN ADDITION TO THE INCREASING SHEAR, DRY AIR
- ENTRAINMENT FROM THE WEST IS EXPECTED TO BEGIN IMPACTING THE
- VORTEX, FURTHER AIDING IN THE WEAKENING TREND. 11S IS FORECAST TO
- WEAKEN BELOW 35 KTS AROUND TAU 96.
- MODEL DISCUSSION: NUMERICAL MODEL TRACK GUIDANCE IS IN GOOD
- AGREEMENT THROUGH TAU 48, WITH THE EXCEPTION OF NAVGEM, WHICH
- TRACKS THE VORTEX MUCH FURTHER EASTWARD THAN THE REMAINDER OF
- GUIDANCE. DISCOUNTING NAVGEM, THERE IS A 70 NM CROSS-TRACK SPREAD
- AT TAU 48. AFTER TAU 48, MODEL START TO DIVERGE DUE TO DIFFERING
- INTERACTIONS WITH THE STEERING MECHANISM SWITCH. GFS AND THE GFS
- ENSEMBLE MEAN ARE THE TWO FASTEST MODELS DURING THROUGHOUT THE
- WESTWARD TURN. ON THE OTHER HAND, ECMWF IS THE SLOWEST TO TURN THE
- SYSTEM. ALONG-TRACK SPREAD AT TAU 96 INCREASES TO OVER 400 NM WITH
- THE GFS BEING FAR AND AWAY THE FASTEST MODEL. THE JTWC TRACK
- FORECAST IS PLACED NEAR THE CONSENSUS THROUGH TAU 72 AND THEN
- CLOSER TO THE GOOGLE DEEPMIND THEREAFTER. INTENSITY GUIDANCE
- GENERALLY AGREES ON MARGINAL INTENSIFICATION THROUGH TAU 36 AND
- WEAKENING AFTERWARD. COAMPS-TC (GFS BASED) HAS A MUCH SHARPER
- WEAKENING TREND AFTER TAU 36, DROPPING THE INTENSITY TO JUST 15 KTS
- AT TAU 96. THE JTWC INTENSITY FORECAST IS PLACED NEAR THE
- MULTI-MODEL CONSENSUS WITH MEDIUM CONFIDENCE.
- FORECAST CONFIDENCE:
- TRACK 00-72 HR: MEDIUM
- TRACK 72-120 HR: LOW
- INTENSITY 00-72 HR: MEDIUM
- INTENSITY 72-120 HR: MEDIUM//
- NNNN
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