西澳以北一级热带气旋“黛安娜”(28U/28S.Dianne) - 近岸获名

NaTyphoon

南半球已经有多少年没编到SH30了，感觉今年挺有希望啊

yhh

WTXS32 PGTW 281500
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE 28S (DIANNE) WARNING NR 003//
RMKS/
1. TROPICAL CYCLONE 28S (DIANNE) WARNING NR 003   
   02 ACTIVE TROPICAL CYCLONES IN SOUTHIO
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   281200Z --- NEAR 15.6S 123.8E
     MOVEMENT PAST SIX HOURS - 175 DEGREES AT 08 KTS
     POSITION ACCURATE TO WITHIN 060 NM
     POSITION BASED ON CENTER LOCATED BY A COMBINATION OF
     SATELLITE, RADAR AND SYNOPTIC DATA
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 034 KT WINDS - 065 NM NORTHEAST QUADRANT
                            040 NM SOUTHEAST QUADRANT
                            060 NM SOUTHWEST QUADRANT
                            070 NM NORTHWEST QUADRANT
   REPEAT POSIT: 15.6S 123.8E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   290000Z --- 17.0S 123.9E
   MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
   RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT
                            040 NM SOUTHEAST QUADRANT
                            060 NM SOUTHWEST QUADRANT
                            090 NM NORTHWEST QUADRANT
   VECTOR TO 24 HR POSIT: 175 DEG/ 08 KTS
    ---
   24 HRS, VALID AT:
   291200Z --- 18.6S 124.0E
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
   VECTOR TO 36 HR POSIT: 175 DEG/ 08 KTS
    ---
   36 HRS, VALID AT:
   300000Z --- 20.1S 124.2E
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
    ---
REMARKS:
281500Z POSITION NEAR 15.9S 123.8E.
28MAR25. TROPICAL CYCLONE 28S (DIANNE), LOCATED APPROXIMATELY 166
NM NORTHEAST OF BROOME, AUSTRALIA, HAS TRACKED SOUTHWARD AT 08
KNOTS OVER THE PAST SIX HOURS.
MINIMUM CENTRAL PRESSURE AT 281200Z IS 992 MB. MAXIMUM
SIGNIFICANT WAVE HEIGHT AT 281200Z IS 16 FEET. NEXT WARNINGS AT
282100Z, 290300Z, 290900Z AND 291500Z.
REFER TO TROPICAL CYCLONE 27S (COURTNEY) WARNINGS (WTXS31 PGTW)
FOR TWELVE-HOURLY UPDATES.//
NNNN

1. WDXS32 PGTW 281500
   
2. MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
   
3. SUBJ/PROGNOSTIC REASONING FOR TROPICAL CYCLONE 28S (DIANNE) WARNING
   
4. NR
   
5. 003//
   
6. RMKS/
   
7. 1. FOR METEOROLOGISTS.
   
8. 2. 6 HOUR SUMMARY AND ANALYSIS.
   
9. 
   
10. SUMMARY:
    
11.    INITIAL POSITION: 15.6S 123.8E
    
12.    INITIAL INTENSITY: 40 KTS
    
13.    GEOGRAPHIC REFERENCE: 166 NM NORTHEAST OF BROOME, AUSTRALIA
    
14.    MOVEMENT PAST 6 HOURS: SOUTHWARD AT 08 KTS
    
15.    SIGNIFICANT WAVE HEIGHT: 16 FEET
    
16. 
    
17. SATELLITE ANALYSIS, INITIAL POSITION AND INTENSITY DISCUSSION:
    
18. ANIMATED ENHANCED INFRARED (EIR) SATELLITE IMAGERY DEPICTS CYCLING
    
19. DEEP CONVECTION, LACKING ANY DISTINCT ORGANIZATION AROUND THE
    
20. ASSESSED CENTER. THE LOW LEVEL CIRCULATION CENTER (LLCC) IS FULLY
    
21. OBSCURED BY THE CONVECTION AND CIRRUS BLOWOFF AND THE SYSTEM LIES
    
22. ON THE EXTREME EDGE OF THE BROOME RADAR COVERAGE. HOWEVER, A
    
23. HIGH-RESOLUTION WSF-M 37GHZ MICROWAVE IMAGE CAME IN AND SAVED THE
    
24. DAY, SHOWING A RELATIVELY LARGE LLCC WITH CYCLONICALLY CURVED BANDS
    
25. OF STRONG CONVECTION WRAPPING INTO THE LOW EMISSIVITY REGION (LER).
    
26. COMBINED WITH AN ANALYSIS OF THE SURFACE WIND REPORTS FROM ADELE
    
27. ISLAND, SUGGESTING THAT THAT THE LLCC PASSED SOUTH OF A LINE
    
28. EXTENDING DUE EAST OF THE STATION AROUND 1100Z, PROVIDED ADDITIONAL
    
29. CONFIDENCE TO THE INITIAL POSITIONING. THE INITIAL INTENSITY IS
    
30. ASSESSED WITH MEDIUM CONFIDENCE, BASED ON A BLEND OF THE OBJECTIVE
    
31. AND SUBJECTIVE INTENSITY ESTIMATES NOTED ABOVE. THE ENVIRONMENT
    
32. REMAINS FAVORABLE WITH LOW WIND SHEAR, VERY WARM SSTS AND DECENT
    
33. OUTFLOW ALOFT, THOUGH THE SHORT TIME REMAINING OVER WATER WILL BE
    
34. THE PRIMARY FACTOR IN KEEPING A LID ON THE INTENSIFICATION OF TC
    
35. 28S.
    
36. 
    
37. INITIAL WIND RADII BASIS: PERSISTENCE
    
38. 
    
39. CURRENT STEERING MECHANISM: WESTERN PERIPHERY OF A DEEP-LAYER
    
40. SUBTROPICAL RIDGE (STR) CENTERED FAR TO THE EAST.
    
41. 
    
42. AGENCY DVORAK AND AUTOMATED FIXES:
    
43.    PGTW: T2.5 - 35 KTS
    
44.    KNES: T2.5 - 35 KTS
    
45.    APRF: T3.0 - 45 KTS
    
46.    CIMSS ADT: 47 KTS AT 281140Z
    
47.    CIMSS AIDT: 39 KTS AT 281140Z
    
48.    CIMSS D-MINT: 27 KTS AT 280956Z
    
49.    CIMSS D-PRINT: 40 KTS AT 281140Z
    
50. 
    
51. FORECASTER ASSESSMENT OF CURRENT ENVIRONMENT: FAVORABLE
    
52.    VWS: 10-15 KTS
    
53.    SST: 29-30 CELSIUS
    
54.    OUTFLOW: MODERATE WESTWARD
    
55.    OTHER FACTORS: PROXIMITY TO LAND.
    
56. 
    
57. ANALYSIS CONFIDENCE:
    
58.    INITIAL POSITION: HIGH
    
59.    INITIAL INTENSITY: MEDIUM
    
60.    INITIAL WIND RADII: LOW
    
61. 
    
62. 3. FORECAST REASONING.
    
63. 
    
64. SIGNIFICANT FORECAST CHANGES: THERE ARE NO SIGNIFICANT CHANGES TO
    
65. THE FORECAST FROM THE PREVIOUS WARNING.
    
66. 
    
67. FORECAST DISCUSSION: TROPICAL CYCLONE (TC) 28S (DIANNE) WILL
    
68. CONTINUE TRACKING SOUTHWARD ALONG THE WESTERN SIDE OF THE STEERING
    
69. RIDGE THROUGH THE ENTIRETY OF THE FORECAST PERIOD. LANDFALL IS
    
70. EXPECTED IN THE VICINITY OF KOOLAN ISLAND WITHIN THE NEXT SIX HOURS
    
71. OR SO. CONTINUING ITS TREK SOUTHWARD, TC 28S MAY BRIEFLY PASS BACK
    
72. OVER THE FAR SOUTHEASTERN PORTION OF KING SOUND AROUND TAU 12
    
73. BEFORE MOVING FURTHER INLAND FOR THE REMAINDER OF THE FORECAST
    
74. PERIOD. THE SYSTEM COULD INTENSIFY A BIT MORE IN THE FEW HOURS LEFT
    
75. OVER WATER AS THE SSTS IN THIS AREA ARE ZESTY, AND SHEAR IS LOW.
    
76. HOWEVER, INGESTION OF DRY AIR FROM THE AUSTRALIAN LANDMASS AND
    
77. DISRUPTION OF THE INFLOW LAYER DUE TO TERRAIN INTERACTION MEAN THAT
    
78. FURTHER INTENSIFICATION WILL BE LIMITED TO JUST 5-10 KNOTS. ONCE
    
79. THE SYSTEM IS ASHORE IT WILL START TO WEAKEN BUT THE FURTHER WEST
    
80. THE TRACK IS, THE LONGER IT WILL MAINTAIN A RELATIVELY HIGH
    
81. INTENSITY. BUT ONCE IT IS FIRMLY ASHORE TO THE SOUTHEAST OF DERBY,
    
82. TC 28S WILL RAPIDLY WEAKEN AND DISSIPATE BETWEEN TAU 24 AND TAU 36.
    
83. 
    
84. 
    
85. MODEL DISCUSSION: DETERMINISTIC MODEL GUIDANCE IS IN GOOD
    
86. AGREEMENT, THE CROSS-TRACK SPREAD IN THE GUIDANCE PACKAGE HAVING
    
87. LOWERED EVEN MORE FROM SIX HOURS AGO. THE UKMET ENSEMBLE AND EGRR
    
88. DETERMINISTIC TRACKER REMAIN ON THE WESTERN EDGE OF THE PACKAGE,
    
89. AND GFS REMAINS ON THE EASTERN EDGE BUT OVERALL THE GUIDANCE HAS
    
90. COME INTO BETTER AGREEMENT. THE JTWC FORECAST IS CONSISTENT WITH
    
91. BOTH THE PREVIOUS FORECAST AND THE MULTI-MODEL CONSENSUS. INTENSITY
    
92. GUIDANCE IS IN GOOD AGREEMENT SHOWING STEADY TO RAPID WEAKENING
    
93. FROM THE BEGINNING OF THE FORECAST. THE JTWC FORECAST DIVERGES FROM
    
94. THE GUIDANCE IN MAINTAINING A 40 KNOT INTENSITY THROUGH TAU 12 BUT
    
95. THEN REJOINS THE PACK THEREAFTER.
    
96. 
    
97. FORECAST CONFIDENCE:
    
98.    TRACK 0 - 72 HR: HIGH
    
99.    INTENSITY 0 - 72 HR: HIGH//
    
100. NNNN

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pocketbox

IDW24200

Australian Bureau of Meteorology
Tropical Cyclone Warning Centre

Media: The Standard Emergency Warning Signal should NOT be used with this warning.

TOP PRIORITY FOR IMMEDIATE BROADCAST
TROPICAL CYCLONE ADVICE NUMBER 10
Issued at 11:43 pm WST on Friday 28 March 2025

Headline:
Tropical Cyclone Dianne crossing the Kimberley coast near Cockatoo Island over the next few hours.

Areas Affected:
Warning Zone
Kuri Bay to Derby, including Derby.

Watch Zone
None.

Cancelled Zone
None.

Details of Tropical Cyclone Dianne 28U at 11:00 pm AWST:
Intensity: Category 1, sustained winds near the centre of 75 kilometres per hour with wind gusts to 100 kilometres per hour.

Location: within 30 kilometres of 15.9 degrees South 124.0 degrees East, estimated to be 75 kilometres southwest of Kuri Bay and 160 kilometres north northeast of Derby.

Movement: south southeast at 14 kilometres per hour.

Tropical Cyclone Dianne will make landfall just to the east of Cockatoo Island over the next few hours, then weaken rapidly as it moves inland early Saturday morning. Although damaging winds are unlikely after TC Dianne weakens over land during the weekend, heavy rainfall is likely to extend through inland parts of the Kimberley and adjacent parts of the North Interior.

Hazards:
Gales with DAMAGING WIND GUSTS to 100 kilometres per hour may develop in coastal areas between Kuri Bay and Derby tonight and during the early hours of Saturday morning. The most likely risk period for gales at Derby is during the early hours of Saturday morning, however it is becoming less likely that they occur at all.

HEAVY RAINFALL which may lead to FLASH FLOODING is likely in parts of the northern and western Kimberley, extending further inland parts of the Kimberley and adjacent parts of the North Interior over the weekend. Refer to Severe Weather Warning for details bom.gov.au/wa/warnings/

As the system approaches and crosses the coast tides between Cockatoo Island and Mitchell Plateau may rise above the normal high tide mark, but the sea level should not exceed the highest tide of the year.

Recommended Action:
Ensure you know what to do in a cyclone. For the latest DFES community alerts and warnings visit www.emergency.wa.gov.au or download the Emergency WA app.

Next Advice:
The next advice will be issued by 3:00 am AWST Saturday 29 March.

Cyclone advices and DFES Alerts are available by dialling 13 DFES (13 3337)

A map showing the track of the cyclone is available at: http://www.bom.gov.au/cyclone

	Time (AWST)	Intensity Category	Latitude (decimal deg.)	Longitude (decimal deg.)	Estimated Position Accuracy (km)
0hr	11 pm March 28	1	15.9S	124.0E	30
+6hr	5 am March 29	tropical low	16.9S	124.1E	50
+12hr	11 am March 29	tropical low	17.7S	124.0E	75
+18hr	5 pm March 29	tropical low	18.5S	124.0E	95
+24hr	11 pm March 29	tropical low	19.0S	124.0E	105
+36hr	11 am March 30	tropical low	19.9S	124.2E	140
+48hr	11 pm March 30	tropical low	20.2S	125.0E	165
+60hr	11 am March 31	tropical low	20.6S	126.2E	190
+72hr	11 pm March 31	tropical low	XXX	XXX	XXX

ygsj24

IDW24200

Australian Bureau of Meteorology
Tropical Cyclone Warning Centre

Media: The Standard Emergency Warning Signal should NOT be used with this warning.

TOP PRIORITY FOR IMMEDIATE BROADCAST
TROPICAL CYCLONE ADVICE NUMBER 11
Issued at 2:55 am WST on Saturday 29 March 2025

Headline:
Tropical Cyclone Dianne has crossed the Kimberley coast, just to east of Cockatoo Island early this morning.

Areas Affected:
Warning Zone
Kuri Bay to Derby, including Derby.

Watch Zone
None.

Cancelled Zone
None.

Details of Tropical Cyclone Dianne 28U at 2:00 am AWST:
Intensity: Category 1, sustained winds near the centre of 75 kilometres per hour with wind gusts to 100 kilometres per hour.

Location: within 35 kilometres of 16.2 degrees South 123.9 degrees East, estimated to be 105 kilometres southwest of Kuri Bay and 125 kilometres north northeast of Derby.

Movement: south southeast at 12 kilometres per hour.

Tropical Cyclone Dianne has made landfall just to the east of Cockatoo Island early this morning, and is expected to continue moving south during the morning, taking it further inland.

Dianne is expected to weaken below tropical cyclone strength in the next few hours.

Hazards:
Gales with DAMAGING WIND GUSTS to 100 kilometres per hour over coastal areas between Kuri Bay and Derby, extending inland to the east of Derby during the early morning. Damaging wind gusts may occur on the southern side close to the centre as it moves further inland during the day.

HEAVY RAINFALL which may lead to FLASH FLOODING is likely in parts of the northern and western Kimberley, extending further inland parts of the Kimberley and adjacent parts of the North Interior over the weekend as Dianne moves further inland. Refer to Severe Weather Warning for details bom.gov.au/wa/warnings/

Recommended Action:
Ensure you know what to do in a cyclone. For the latest DFES community alerts and warnings visit www.emergency.wa.gov.au or download the Emergency WA app.

Next Advice:
The next advice will be issued by 6:00 am AWST Saturday 29 March.

Cyclone advices and DFES Alerts are available by dialling 13 DFES (13 3337)

A map showing the track of the cyclone is available at: http://www.bom.gov.au/cyclone

---

AXAU02 APRF 281910
IDW27700
TROPICAL CYCLONE TECHNICAL BULLETIN: AUSTRALIA - WESTERN REGION
ISSUED BY AUSTRALIAN BUREAU OF METEOROLOGY TROPICAL CYCLONE WARNING CENTRE
AT: 1910 UTC 28/03/2025
NAME: TROPICAL CYCLONE DIANNE
IDENTIFIER: 28U
DATA AT: 1800 UTC
LATITUDE: 16.2S
LONGITUDE: 123.9E
LOCATION ACCURACY: WITHIN 20NM (35 KM)
MOVEMENT TOWARDS: SOUTH SOUTHEAST (167 DEG)
SPEED OF MOVEMENT: 7 KNOTS (12 KM/H)
MAXIMUM 10-MINUTE WIND: 40 KNOTS (75 KM/H)
MAXIMUM 3-SECOND WIND GUST: 55 KNOTS (100 KM/H)
CENTRAL PRESSURE: 988 HPA
RADIUS OF 34-KNOT WINDS NE QUADRANT: 30 NM (55 KM)
RADIUS OF 34-KNOT WINDS SE QUADRANT: 25 NM (45 KM)
RADIUS OF 34-KNOT WINDS SW QUADRANT: 20 NM (35 KM)
RADIUS OF 34-KNOT WINDS NW QUADRANT: 30 NM (55 KM)
RADIUS OF 48-KNOT WINDS NE QUADRANT:
RADIUS OF 48-KNOT WINDS SE QUADRANT:
RADIUS OF 48-KNOT WINDS SW QUADRANT:
RADIUS OF 48-KNOT WINDS NW QUADRANT:
RADIUS OF 64-KNOT WINDS:   NM (  KM)
RADIUS OF MAXIMUM WINDS: 15 NM (30 KM)
DVORAK INTENSITY CODE: T2.5/3.0/D0.5/24HRS STT:S0.0/06HRS
PRESSURE OF OUTERMOST ISOBAR: 1000 HPA
RADIUS OF OUTERMOST CLOSED ISOBAR: 80 NM (150 KM)
FORECAST DATA
DATE/TIME    : LOCATION    : LOC. ACCURACY: MAX WIND   : CENTRAL PRESSURE
(UTC)        : DEGREES     :      NM  (KM): KNOTS(KM/H): HPA
+06:  29/0000: 17.0S 124.0E:     030 (060):  035  (065):  995
+12:  29/0600: 17.8S 124.2E:     045 (085):  030  (055):  995
+18:  29/1200: 18.5S 124.2E:     050 (090):  030  (055):  996
+24:  29/1800: 19.0S 124.3E:     055 (105):  030  (055):  995
+36:  30/0600: 19.9S 124.5E:     085 (155):  025  (045):  998
+48:  30/1800:             :              :            :
+60:  31/0600:             :              :            :
+72:  31/1800:             :              :            :
+96:  01/1800:             :              :            :
+120: 02/1800:             :              :            :
REMARKS:
TROPICAL CYCLONE DIANNE HAS MADE LANDFALL JUST TO THE EAST OF COCKATOO ISLAND
EARLY THIS MORNING, IT IS EXPECTED TO CONTINUE MOVING INLAND DURING THE
MORNING, WHILE WEAKENING.

POSITION BASED ON SURFACE OBSERVATIONS AT ADELE ISLAND AND KOOLAN ISLAND, AND
EIR SATELLITE IMAGERY, WITH GOOD CONFIDENCE. CURRENT INTENSITY SET AT 40 KT.

OBSERVATIONS AT KOOLAN ISLAND HAS BEEN IN STRONG GALES SINCE 2 AM AND
CONTINUING. THE LOWEST PRESSURE RECORDING WAS 987.6HPA AT 2 AM.

DVORAK ANALYSIS: DT=2.5 BASED ON A CURVED BAND PATTERN WITH AN 0.5 WRAP.  A
24-HOUR D- TREND YIELDS MET 2.5, PAT 2.5. FT2.5/CI 3.0. OBJECTIVE AIDS (1-MIN
MEAN) GAVE: ADT 59 KT, AIDT 46 KT, AND DPRINT 49 KT.

ENVIRONMENTAL CONDITIONS ARE FAVOURABLE, BUT THE SYSTEM IS NOW MOVING OVER
LAND. IT IS EXPECTED TO WEAKEN AND LOSE SUSTAINED SURFACE GALES IN THE NEXT
SEVERAL HOURS, HOWEVER STRONGER WINDS MAY PERSIST ALOFT AS IT PUSHES FURTHER
INLAND DURING THE DAY. RISK OF DAMAGING GUSTS MAY OCCUR , ESPECIALLY ON THE
SOUTHERN SIDE DURING THE DAY DUE TO MIXING.

THE SYSTEM MOTION IS EXPECTED TO CONTINUE SOUTH SOUTHEAST TAKING IT FURTHER
INLAND,  COINCIDING WITH THE PASSAGE OF A MID-LATITUDE TROUGH TO THE SOUTHEAST,
AND A STRENGTHENING OF THE RIDGE TO THE EAST.

COPYRIGHT COMMONWEALTH OF AUSTRALIA
==
THE NEXT BULLETIN FOR THIS SYSTEM WILL BE ISSUED BY: 29/0130 UTC.=

	Time (AWST)	Intensity Category	Latitude (decimal deg.)	Longitude (decimal deg.)	Estimated Position Accuracy (km)
0hr	2 am March 29	1	16.2S	123.9E	35
+6hr	8 am March 29	tropical low	17.0S	124.0E	60
+12hr	2 pm March 29	tropical low	17.8S	124.2E	85
+18hr	8 pm March 29	tropical low	18.5S	124.2E	90
+24hr	2 am March 30	tropical low	19.0S	124.3E	105
+36hr	2 pm March 30	tropical low	19.9S	124.5E	160
+48hr	2 am March 31	tropical low	XXX	XXX	XXX
+60hr	2 pm March 31	tropical low	XXX	XXX	XXX
+72hr	2 am April 1	tropical low	XXX	XXX	XXX

ygsj24

WTXS32 PGTW 282100
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE 28S (DIANNE) WARNING NR 004//
RMKS/
1. TROPICAL CYCLONE 28S (DIANNE) WARNING NR 004   
   02 ACTIVE TROPICAL CYCLONES IN SOUTHIO
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   281800Z --- NEAR 16.2S 123.8E
     MOVEMENT PAST SIX HOURS - 180 DEGREES AT 07 KTS
     POSITION ACCURATE TO WITHIN 060 NM
     POSITION BASED ON CENTER LOCATED BY A COMBINATION OF
     SATELLITE AND RADAR
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
   RADIUS OF 034 KT WINDS - 055 NM NORTHEAST QUADRANT
                            040 NM SOUTHEAST QUADRANT
                            050 NM SOUTHWEST QUADRANT
                            045 NM NORTHWEST QUADRANT
   REPEAT POSIT: 16.2S 123.8E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   290600Z --- 17.9S 123.9E
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
   RADIUS OF 034 KT WINDS - 025 NM NORTHEAST QUADRANT
                            035 NM SOUTHEAST QUADRANT
                            045 NM SOUTHWEST QUADRANT
                            030 NM NORTHWEST QUADRANT
   VECTOR TO 24 HR POSIT: 180 DEG/ 07 KTS
    ---
   24 HRS, VALID AT:
   291800Z --- 19.2S 123.9E
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
   VECTOR TO 36 HR POSIT: 155 DEG/ 06 KTS
    ---
   36 HRS, VALID AT:
   300600Z --- 20.3S 124.4E
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
    ---
REMARKS:
282100Z POSITION NEAR 16.6S 123.8E.
28MAR25. TROPICAL CYCLONE 28S (DIANNE), LOCATED APPROXIMATELY 137
NM NORTHEAST OF BROOME, AUSTRALIA, HAS TRACKED SOUTHWARD AT 07
KNOTS OVER THE PAST SIX HOURS. ANIMATED ENHANCED INFRARED (EIR)
IMAGERY, COMBINED WITH RADAR IMAGERY FROM BROOME, AUSTRALIA REVEAL
THAT TC 28S HAS MADE LANDFALL SOUTHEAST OF THE KOOLAND ISLAND AND
IS FORECAST TO CONTINUE TRACKING SOUTHWARD. SURFACE PRESSURE AND
WIND DIRECTION OBSERVATIONS SUPPORT THE ASSESSED POSITION AS WELL.
TC DIANNE WILL MAINTAIN 40-45 KTS INTENSITY FOR THE NEXT SIX HOURS,
BUT IS FORECAST TO START WEAKENING MORE RAPIDLY ONCE IT PASSES SOUTH
OF THE KING SOUND. TC 28S WILL FULLY DISSIPATE OVER LAND BY TAU 24,
AFTER WHICH THE REMNANTS OF THE VORTEX WILL TRACK SOUTHEASTWARD AND
FURTHER INLAND. THIS IS THE FINAL WARNING ON THIS SYSTEM BY THE
JOINT TYPHOON WRNCEN PEARL HARBOR HI. THE SYSTEM WILL BE CLOSELY
MONITORED FOR SIGNS OF REGENERATION. MINIMUM CENTRAL PRESSURE AT
281800Z IS 991 MB. REFER TO TROPICAL CYCLONE 27S (COURTNEY) WARNINGS
(WTXS31 PGTW) FOR TWELVE-HOURLY UPDATES.//
NNNN

ygsj24

IDW24200

Australian Bureau of Meteorology
Tropical Cyclone Warning Centre

Media: The Standard Emergency Warning Signal should NOT be used with this warning.

TOP PRIORITY FOR IMMEDIATE BROADCAST
TROPICAL CYCLONE ADVICE NUMBER 12
Issued at 5:56 am WST on Saturday 29 March 2025

Headline:
Tropical Cyclone Dianne is moving southwards just inland from Kimberley coast and slowly weakening.

Areas Affected:
Warning Zone
Kuri Bay to Derby, including Derby.

Watch Zone
None.

Cancelled Zone
None.

Details of Tropical Cyclone Dianne 28U at 5:00 am AWST:
Intensity: Category 1, sustained winds near the centre of 75 kilometres per hour with wind gusts to 100 kilometres per hour.

Location: within 35 kilometres of 16.6 degrees South 123.9 degrees East, estimated to be 80 kilometres north northeast of Derby and 145 kilometres south southwest of Kuri Bay.

Movement: south southeast at 13 kilometres per hour.

Tropical Cyclone Dianne made landfall just to the east of Cockatoo Island early this morning, and is moving southwards, just inland from the coast. It is expected to pass east of Derby at about midday. Dianne is expected to weaken below tropical cyclone strength in the next few hours.

Hazards:
Gales with DAMAGING WIND GUSTS to 100 kilometres per hour over coastal areas between Kuri Bay and Derby, possibly extending south to Derby during the morning. Damaging wind gusts may occur on the southern side close to the centre as it moves further inland during the day.

HEAVY RAINFALL which may lead to FLASH FLOODING is likely in parts of the northern and western Kimberley, extending further inland parts of the Kimberley and adjacent parts of the North Interior over the weekend as Dianne moves further inland. Refer to Severe Weather Warning for details bom.gov.au/wa/warnings/

Recommended Action:
Ensure you know what to do in a cyclone. For the latest DFES community alerts and warnings visit www.emergency.wa.gov.au or download the Emergency WA app.

Next Advice:
The next advice will be issued by 9:00 am AWST Saturday 29 March.

Cyclone advices and DFES Alerts are available by dialling 13 DFES (13 3337)

A map showing the track of the cyclone is available at: http://www.bom.gov.au/cyclone

	Time (AWST)	Intensity Category	Latitude (decimal deg.)	Longitude (decimal deg.)	Estimated Position Accuracy (km)
0hr	5 am March 29	1	16.6S	123.9E	35
+6hr	11 am March 29	tropical low	17.3S	123.9E	60
+12hr	5 pm March 29	tropical low	18.1S	123.9E	75
+18hr	11 pm March 29	tropical low	18.7S	123.9E	90
+24hr	5 am March 30	tropical low	19.1S	123.9E	100
+36hr	5 pm March 30	tropical low	19.8S	124.4E	135
+48hr	5 am March 31	tropical low	XXX	XXX	XXX
+60hr	5 pm March 31	tropical low	XXX	XXX	XXX
+72hr	5 am April 1	tropical low	XXX	XXX	XXX

ygsj24

IDW24200

Australian Bureau of Meteorology
Tropical Cyclone Warning Centre

Media: The Standard Emergency Warning Signal should NOT be used with this warning.

PRIORITY
TROPICAL CYCLONE ADVICE NUMBER 13
Issued at 8:46 am WST on Saturday 29 March 2025

Headline:
Heavy rainfall expected in the Kimberley as Ex-Tropical Cyclone Dianne moves inland.

Areas Affected:
Warning Zone
None.

Watch Zone
None.

Cancelled Zone
Kuri Bay to Derby, including Derby .

Details of Ex-Tropical Cyclone Dianne 28U at 8:00 am AWST:
Intensity: Tropical Low, sustained winds near the centre of 65 kilometres per hour with wind gusts to 95 kilometres per hour.

Location: within 45 kilometres of 17.1 degrees South 123.9 degrees East, estimated to be 35 kilometres northeast of Derby and 215 kilometres northwest of Fitzroy Crossing.

Movement: south at 13 kilometres per hour.

Ex-Tropical Cyclone Dianne is near Derby, moving southwards and weakening.

Hazards:
Refer to Severe Weather Warning bom.gov.au/wa/warnings/

HEAVY RAINFALL which may lead to FLASH FLOODING is likely in parts of the northern and western Kimberley, extending to further inland parts of the Kimberley and adjacent North Interior over the weekend as Ex-Tropical Cyclone Dianne moves further inland.

Gales with DAMAGING WIND GUSTS to 100 kilometres per hour may still occur over coastal areas between Cockatoo Island and Derby this morning. Damaging wind gusts may occur on the southern side close to the centre as it moves further inland during the day.

Recommended Action:
Ensure you know what to do in a cyclone. For the latest DFES community alerts and warnings visit www.emergency.wa.gov.au or download the Emergency WA app.

Next Advice:
No further advices will be issued for this system.

Cyclone advices and DFES Alerts are available by dialling 13 DFES (13 3337)

A map showing the track of the cyclone is available at: http://www.bom.gov.au/cyclone

---

AXAU02 APRF 290107
IDW27700
TROPICAL CYCLONE TECHNICAL BULLETIN: AUSTRALIA - WESTERN REGION
ISSUED BY AUSTRALIAN BUREAU OF METEOROLOGY TROPICAL CYCLONE WARNING CENTRE
AT: 0107 UTC 29/03/2025
NAME: EX-TROPICAL CYCLONE DIANNE
IDENTIFIER: 28U
DATA AT: 0000 UTC
LATITUDE: 17.1S
LONGITUDE: 123.9E
LOCATION ACCURACY: WITHIN 25NM (45 KM)
MOVEMENT TOWARDS: SOUTH (176 DEG)
SPEED OF MOVEMENT: 7 KNOTS (13 KM/H)
MAXIMUM 10-MINUTE WIND: 35 KNOTS (65 KM/H)
MAXIMUM 3-SECOND WIND GUST: 50 KNOTS (95 KM/H)
CENTRAL PRESSURE: 993 HPA
RADIUS OF 34-KNOT WINDS NE QUADRANT:
RADIUS OF 34-KNOT WINDS SE QUADRANT:
RADIUS OF 34-KNOT WINDS SW QUADRANT:
RADIUS OF 34-KNOT WINDS NW QUADRANT: 30 NM (55 KM)
RADIUS OF 48-KNOT WINDS NE QUADRANT:
RADIUS OF 48-KNOT WINDS SE QUADRANT:
RADIUS OF 48-KNOT WINDS SW QUADRANT:
RADIUS OF 48-KNOT WINDS NW QUADRANT:
RADIUS OF 64-KNOT WINDS:   NM (  KM)
RADIUS OF MAXIMUM WINDS:   NM (  KM)
DVORAK INTENSITY CODE:
PRESSURE OF OUTERMOST ISOBAR: 1000 HPA
RADIUS OF OUTERMOST CLOSED ISOBAR: 60 NM (110 KM)
FORECAST DATA
DATE/TIME    : LOCATION    : LOC. ACCURACY: MAX WIND   : CENTRAL PRESSURE
(UTC)        : DEGREES     :      NM  (KM): KNOTS(KM/H): HPA
+06:  29/0600: 17.9S 123.9E:     035 (070):  035  (065):  992
+12:  29/1200: 18.6S 123.9E:     045 (085):  035  (065):  992
+18:  29/1800: 19.1S 123.9E:     055 (100):  030  (055):  993
+24:  30/0000: 19.5S 123.9E:     060 (110):  030  (055):  995
+36:  30/1200: 20.0S 124.6E:     080 (145):  025  (045):  998
+48:  31/0000:             :              :            :
+60:  31/1200:             :              :            :
+72:  01/0000:             :              :            :
+96:  02/0000:             :              :            :
+120: 03/0000:             :              :            :
REMARKS:
EX-TROPICAL CYCLONE DIANNE IS MOVING INLAND AND WEAKENING.

POSITION IS BASED ON SURFACE OBSERVATIONS AT DERBY AND BROOME RADAR WITH GOOD
CONFIDENCE.

THE SYSTEM IS OVER LAND SO DVORAK NO LONGER APPLICABLE. ONLY CURRENT OBJECTIVE
AID IS DPRINT 49 KT (1-MIN MEAN). INTENSITY SET AT 35 KT BASED ON SURFACE
OBSERVATIONS, WITH GALES CONFINED TO THE NW QUADRANT.

THE SYSTEM IS NOW MOVING OVER LAND, THOUGH ENVIRONMENTAL CONDITIONS ARE
OTHERWISE FAVOURABLE. IT IS EXPECTED TO WEAKEN AND LOSE SUSTAINED SURFACE GALES
LATER TODAY, HOWEVER STRONGER WINDS MAY PERSIST ALOFT AS IT PUSHES FURTHER
INLAND DURING THE DAY. RISK OF DAMAGING GUSTS MAY OCCUR, ESPECIALLY ON THE
SOUTHERN SIDE DURING THE DAY DUE TO VERTICAL MIXING.

THE SYSTEM MOTION IS EXPECTED TO CONTINUE SOUTH SOUTHEAST TAKING IT FURTHER
INLAND,  COINCIDING WITH THE PASSAGE OF A MID-LATITUDE TROUGH TO THE SOUTHEAST,
AND A STRENGTHENING OF THE RIDGE TO THE EAST.

COPYRIGHT COMMONWEALTH OF AUSTRALIA
==
THERE WILL BE NO FURTHER BULLETINS FOR THIS SYSTEM.=

	Time (AWST)	Intensity Category	Latitude (decimal deg.)	Longitude (decimal deg.)	Estimated Position Accuracy (km)
0hr	8 am March 29	tropical low	17.1S	123.9E	45
+6hr	2 pm March 29	tropical low	17.9S	123.9E	70
+12hr	8 pm March 29	tropical low	18.6S	123.9E	85
+18hr	2 am March 30	tropical low	19.1S	123.9E	100
+24hr	8 am March 30	tropical low	19.5S	123.9E	110
+36hr	8 pm March 30	tropical low	20.0S	124.6E	145
+48hr	8 am March 31	tropical low	XXX	XXX	XXX
+60hr	8 pm March 31	tropical low	XXX	XXX	XXX
+72hr	8 am April 1	tropical low	XXX	XXX	XXX

ygsj24

全球热带气旋监测公报
预报：宋佳凝  签发：钱奇峰  2025 年 03 月 29 日 10 时

“考特尼”向西南方向移动

时       间：29日08时（北京时）

海       域：澳大利亚附近海域

命       名：“考特尼”，COURTNEY

中心位置：南纬17.5度、东经91.9度

强度等级：四级强热带气旋

最大风力：16级（52米/秒，相当于我国的超强台风级）

中心气压：947百帕

参考位置：科科斯群岛西南方向约800公里的洋面上

变化过程：过去24小时，“考特尼”由14级加强到16级

预报结论：“考特尼”将以每小时20公里左右的速度向西南方向移动，强度逐渐减弱。

图1 卫星红外监测图像（北京时间2025年03月29日08时00分）

澳大利亚附近海域一级热带气旋“黛安娜”生成

时       间：29日08时（北京时）

海       域：澳大利亚附近海域

命       名：“黛安娜”，DIANNE

中心位置：南纬17.1度、东经123.9度

强度等级：一级热带气旋

最大风力：8级（18米/秒，相当于我国的热带风暴级）

中心气压：993百帕

参考位置：澳大利亚境内

变化过程：“黛安娜”昨天夜间生成并加强到8级，今天上午08时于澳大利亚西北部沿岸登陆（8级，18米/秒），登陆后强度减弱为热带低压。

预报结论：“黛安娜”将以每小时15-20公里的速度向偏南方向移动，强度逐渐减弱。

（这是关于“黛安娜”的最后一期监测公报）


图2 卫星红外监测图像（北京时间2025年03月29日08时00分）

pocketbox

IDW23200

40:2:2:24:18S124E400:11:00
SECURITE
CANCELLATION

OCEAN WIND WARNING FOR METAREA 10
Issued by the Australian Bureau of Meteorology
Tropical Cyclone Warning Centre
at 0631 UTC 29 MARCH 2025

GALE WARNING

Please be aware, wind gusts can be a further 40 percent stronger than the
averages given here, and maximum waves may be up to twice the height.

SITUATION
At 0600 UTC Ex-Tropical Cyclone Dianne was centred within 20 nautical miles of
latitude eighteen decimal three south (18.3S)
longitude one hundred and twenty four decimal one east (124.1E)
Recent movement : south at 11 knots moving over land
Maximum winds   : 35 knots
Central pressure: 994 hPa

AREA AFFECTED

FORECAST
Gales are no longer expected over marine areas.

REMARKS
Thank you to ships in the area for providing observations.

The cyclone is weakening over land and no further warnings will be issued.

AUSTRALIAN BUREAU OF METEOROLOGY
TROPICAL CYCLONE WARNING CENTRE

ygsj24

2025 - 073 - SHG3 - SH28 - DIANNE
持续时长：150 小时
最大风速：50 节
最低气压：986 百帕
ACE = 0.98

时刻（UTC）	所在纬度	所在经度	风速（节）	气压（百帕）	强度等级
2025/03/24 06:00	17.0S	122.2E	15	1009	DB
2025/03/24 12:00	17.0S	121.9E	15	1009	DB
2025/03/24 18:00	16.9S	121.6E	15	1009	DB
2025/03/25 00:00	16.7S	121.3E	15	1002	DB
2025/03/25 06:00	16.5S	121.2E	15	1002	DB
2025/03/25 12:00	16.1S	121.2E	15	1004	DB
2025/03/25 18:00	15.9S	121.2E	25	1004	TD
2025/03/26 00:00	15.7S	121.3E	25	1004	TD
2025/03/26 06:00	15.1S	120.9E	25	1000	TD
2025/03/26 12:00	14.7S	120.8E	25	1000	TD
2025/03/26 18:00	14.2S	121.0E	25	998	TD
2025/03/27 00:00	13.8S	121.4E	30	997	TD
2025/03/27 06:00	13.7S	121.9E	30	996	TD
2025/03/27 12:00	13.7S	122.5E	30	996	TD
2025/03/27 18:00	13.9S	123.1E	30	996	TD
2025/03/28 00:00	14.3S	123.5E	35	995	TS
2025/03/28 06:00	14.8S	123.7E	40	991	TS
2025/03/28 12:00	15.5S	123.8E	45	992	TS
2025/03/28 18:00	16.2S	123.9E	50	986	TS
2025/03/29 00:00	17.4S	123.9E	35	994	TS
2025/03/29 06:00	18.4S	124.1E	35	994	TS
2025/03/29 12:00	18.9S	124.0E	30	999	TD
2025/03/29 18:00	20.0S	124.6E	30	999	TD
2025/03/30 00:00	20.3S	124.3E	25	1000	TD
2025/03/30 06:00	20.3S	124.2E	25	1000	TD
2025/03/30 12:00	20.1S	124.8E	20	1001	DB