SIO: LUA - Post-Tropical

[HURAKAN]

Potential Cyclones:
A low is developing south southwest of Bali in the vicinity of 13S 113E. This
low is expected to gradually become better defined over the next three days. It
is possible that it will develop into a tropical cyclone as early as Sunday but
it is more likely to reach tropical cyclone intensity during next week. This low
is expected to be located off the Pilbara coast for much of next week with the
risk of a coastal impact increasing during the week. Pilbara and Kimberley
coastal communities are advised to keep up to date with weather forecasts over
the coming week.

Likelihood of this system being a tropical cyclone in the Western Region:
Friday : Low
Saturday : Low
Sunday : Moderate

[HURAKAN]

AN AREA OF CONVECTION HAS PERSISTED NEAR 12.6S 111.4E,
APPROXIMATELY 600 NM NORTH-NORTHWEST OF LEARMONTH, AUSTRALIA.
ANIMATED INFRARED SATELLITE IMAGERY DEPICTS AN AREA OF BROAD
CYCLONIC TURNING AND FRAGMENTED CONVECTION AROUND A LOW LEVEL
CIRCULATION CENTER (LLCC) EVIDENT IN A 081630Z OSCAT PASS.
ADDITIONALLY, A 082140Z SSMIS IMAGE SHOWS FORMATIVE CONVECTION
BANDING SPIRALING TOWARD THE CENTER OF THIS DISTURBANCE. NUMERICAL
MODEL GUIDANCE SUGGESTS FORMATION OF A TROPICAL CYCLONE IS POSSIBLE
WITHIN THE NEXT FEW DAYS. MAXIMUM SUSTAINED SURFACE WINDS ARE
ESTIMATED AT 15 TO 20 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED
TO BE NEAR 1008 MB. BECAUSE THIS DISTURBANCE IS JUST BEGINNING TO
ORGANIZE, THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT
TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS IS LOW.

[HURAKAN]

Potential Cyclones:
A low is developing south southwest of Bali in the vicinity of 13S 112E. It is
possible that it will develop into a tropical cyclone as early as Sunday but it
is more likely to reach tropical cyclone intensity during next week. This low is
expected to move generally southwards and may be located off the Pilbara coast
for much of next week. The risk of a coastal impact increases during the week.
Pilbara and Kimberley coastal communities are advised to keep up to date with
weather forecasts over the coming days.

Likelihood of this system remaining a tropical cyclone in the Western Region:
Saturday :Low
Sunday :Moderate
Monday :High

[HURAKAN]

Organizing

[HURAKAN]

Potential Cyclones:
A low is developing off the Pilbara coast approximately 600 kilometres north
northwest of Karratha in the vicinity of 16S 114E. It is possible that it will
develop into a tropical cyclone during Sunday but it is more likely to reach
tropical cyclone intensity during the week. This system is not expected to cause
gales in Pilbara communities during Sunday or Monday but the risk of a coastal
impact increases during the week.

Likelihood of this system remaining a tropical cyclone in the Western Region:
Sunday :Moderate
Monday :High
Tuesday :High

[HURAKAN]

becoming better organized

[HURAKAN]

ECMWF expects this system to make landfall on Friday as a large cyclone

[HURAKAN]

Potential Cyclones:
A tropical low lies off the Pilbara coast approximately 470 kilometres northwest
of Karratha in the vicinity of 18S 113.5E. It is possible that it will develop
into a tropical cyclone during Monday but it is more likely to reach tropical
cyclone intensity later in the week. This system is not expected to cause gales
in Pilbara communities during Monday or Tuesday but the risk of a coastal impact
increases during the week.

Likelihood of this system remaining a tropical cyclone in the Western Region:
Monday :Moderate
Tuesday :High
Wednesday :High

[HURAKAN]

THE AREA OF CONVECTION PREVIOUSLY LOCATED NEAR 18.7S
114.7E, IS NOW LOCATED NEAR 18.5S 114.0E, APPROXIMATELY 210 NM NORTH
OF LEARMONTH, AUSTRALIA. ANIMATED MULTISPECTRAL SATELLITE IMAGERY
INDICATES A SLOWLY CONSOLIDATING LOW-LEVEL CIRCULATION CENTER (LLCC)
WITH FORMATIVE CONVECTIVE BANDING AND PERSISTENT DEEP CONVECTION
OVER THE EASTERN SEMI-CIRCLE. A 112158Z CORIOLIS IMAGE DEPICTED
STRONG CONVERGENT FLOW AND CONVECTIVE BANDING OVER THE EASTERN SEMI-
CIRCLE WITH SHALLOW BANDING ELSEWHERE. A 120528Z AMSU IMAGE DEPICTS
IMPROVED ORGANIZATION OVER THE PAST 12 HOURS. THE SYSTEM IS LOCATED
WITHIN A MARGINAL ENVIRONMENT WITH MODERATE EASTERLY VERTICAL WIND
SHEAR (VWS); HOWEVER, VWS IS FORECAST TO DECREASE AND POLEWARD
OUTFLOW IS EXPECTED TO IMPROVE AS A DEEP MIDLATITUDE SHORTWAVE
TROUGH DEEPENS OVER WESTERN AUSTRALIA AFTER 24 HOURS. MAXIMUM
SUSTAINED SURFACE WINDS ARE ESTIMATED AT 20 TO 25 KNOTS. MINIMUM SEA
LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1002 MB. THE POTENTIAL FOR
THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24
HOURS IS UPGRADED TO MEDIUM.

[HURAKAN]

ECMWF forecast for saturday

[HURAKAN]

convection increasing

[wxman57]

Yep, well on its way to becoming a TC. Much better organized than 96P west of Darwin, yet they're issuing advisories on that one.

[HURAKAN]

Continues to get better organized

[HURAKAN]

Latest visible

[HURAKAN]

TXXS21 KNES 130022
TCSSIO

A. TROPICAL DISTURBANCE (95S)

B. 12/2332Z

C. 18.6S

D. 115.3E

E. THREE/MTSAT

F. T2.0/2.0/D2.0/24HRS

G. IR/EIR/VIS/AMSU

H. REMARKS...95S HAS DEVELOPED RAPIDLY OVER THE PAST 24 HRS. 1843Z AMSU
PASS SUGGESTS A TIGHTLY WRAPPED LLCC IS FORMING UNDERNEATH THE DEEPEST
CONVECTION. 5/10 W BANDING YIELDS A DT OF 3.0. MET = 2.0. PT = 2.5. FT
IS BASED ON CONSTRAINTS LIMITING THE FT TO 2.0 WITHIN THE FIRST 24 HRS
OF DEVELOPMENT.

I. ADDL POSITIONS

12/1843Z 19.0S 115.1E AMSU


...GUILLOT

[HURAKAN]

WTXS22 PGTW 122300
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE FORMATION ALERT//
REF/A/JOINT TYPHOON WRNCEN PEARL HARBOR HI/122151Z MAR 12//
AMPN/REF IS TROPICAL CYCLONE FORMATION ALERT (WTXS21 PGTW 122200)//
RMKS/
1. FORMATION OF A SIGNIFICANT TROPICAL CYCLONE IS POSSIBLE WITHIN
A 165 NM RADIUS OF 18.0S 115.3E 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 27 TO 32 KNOTS. METSAT IMAGERY AT 122130Z INDICATES THAT A
CIRCULATION CENTER IS LOCATED NEAR 18.6S 115.5E. THE SYSTEM IS
MOVING SOUTHEASTWARD AT 04 KNOTS.
2. REMARKS: THE AREA OF CONVECTION PREVIOUSLY LOCATED NEAR 18.0S
114.4E IS NOW LOCATED NEAR 18.0S 115.3E, APPROXIMATELY 235 NM NORTH-
NORTHEAST OF LEARMONTH, AUSTRALIA. RECENT ANIMATED INFRARED
SATELLITE IMAGERY DEPICTS A LARGE AREA OF DEEP CONVECTION OVER A LOW
LEVEL CIRCULATION CENTER (LLCC). A 121628Z OSCAT PASS INDICATES THAT
THE LLCC, WHICH HAD PREVIOUSLY BEEN A BROAD, MONSOON DEPRESSION-LIKE
CIRCULATION, HAS SIGNIFICANTLY CONSOLIDATED. THIS SAME IMAGE SHOWS
30 KNOT WINDS ALONG THE EASTERN PERIPHERY OF THE LLCC, WITH HIGHER
WIND VALUES FURTHER EAST ASSOCIATED WITH GRADIENT COMPRESSION. UPPER
LEVEL ANALYSIS INDICATES THIS AREA IS JUST NORTH OF A RIDGE AXIS
WITH MODERATE VERTICAL WIND SHEAR. SEA SURFACE TEMPERATURES IN THE
REGION ARE FAVORABLE (30 DEGREES CELSIUS). DUE TO CONSOLIDATION OF
THE LLCC, THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT
TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS IS HIGH.
3. THIS ALERT WILL BE REISSUED, UPGRADED TO WARNING OR CANCELLED BY
132300Z.
4. SEE REF A FOR DETAILS ON A TROPICAL CYCLONE FORMATION ALERT
LOCATED NEAR 12.1S 128.0E.
//
NNNN

[HURAKAN]

TROPICAL CYCLONE TECHNICAL BULLETIN: AUSTRALIA - WESTERN REGION
Issued by PERTH TROPICAL CYCLONE WARNING CENTRE
at: 0244 UTC 13/03/2012
Name: Tropical Low
Identifier: 16U
Data At: 0000 UTC
Latitude: 18.7S
Longitude: 115.2E
Location Accuracy: within 30 nm [55 km]
Movement Towards: near stationary deg]
Speed of Movement: 0 knots [0 km/h]
Maximum 10-Minute Wind: 30 knots [55 km/h]
Maximum 3-Second Wind Gust: 45 knots [85 km/h]
Central Pressure: 996 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:
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:
Radius of Maximum Winds: N/A
Dvorak Intensity Code: T2.5/2.5/D1.0/24HRS STT:D0.5/12HRS
Pressure of outermost isobar: 1002 hPa
Radius of outermost closed isobar: 180 nm [335 km]
Storm Depth: Deep
FORECAST DATA
Date/Time : Location : Loc. Accuracy: Max Wind : Central Pressure
[UTC] : degrees : nm [km]: knots[km/h]: hPa
+12: 13/1200: 18.4S 115.1E: 060 [110]: 040 [075]: 990
+24: 14/0000: 17.3S 115.0E: 090 [165]: 050 [095]: 985
+36: 14/1200: 17.0S 115.1E: 120 [225]: 055 [100]: 981
+48: 15/0000: 17.0S 115.3E: 155 [285]: 060 [110]: 977
+60: 15/1200: 17.5S 116.5E: 200 [375]: 070 [130]: 971
+72: 16/0000: 18.4S 117.9E: 250 [465]: 080 [150]: 960
REMARKS:
The low has intensified in the past 24 hours with very deep convection about the
low level centre and improving curvature under light vertical wind shear. Strong
easterlies to the south of the low level centre off the Pilbara coast have been
enhanced overnight although these may ease slightly during today.
Dvorak CI held to 2.5 and is supported by MET, although current DT=3.0 based on
0.6 curved band wrap on recent visible imagery, suggesting cyclone intensity is
imminent.

Movement is very slight with the steering balanced between an upper ridge to the
southwest and strengthening monsoonal northwesterlies to the north. A slow
motion to the north is forecast through 48 hours then a southeasterly track is
forecast for the following days towards the Pilbara coast as the ridge weakens
and the monsoon intensifies.

Steady intensification is forecast under the influence of low wind shear and
warm SSTs, although SSTs may cool owing to upwelling with the slow motion. NWP
show a broad system which would indicate rapid intensification is less likely. A
broad area of monsoonal gales is expected to develop north of the centre by
Thursday.

Copyright Commonwealth of Australia
==
The next bulletin for this system will be issued by: 13/0700 UTC by Perth TCWC.

[HURAKAN]

Latest track

[HURAKAN]

TROPICAL CYCLONE TECHNICAL BULLETIN: AUSTRALIA - WESTERN REGION
Issued by PERTH TROPICAL CYCLONE WARNING CENTRE
at: 0704 UTC 13/03/2012
Name: Tropical Cyclone Lua
Identifier: 16U
Data At: 0600 UTC
Latitude: 18.5S
Longitude: 115.0E
Location Accuracy: within 20 nm [35 km]
Movement Towards: near stationary
Speed of Movement: 0 knots [0 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: 40 nm [75 km]
Radius of 34-knot winds SE quadrant: 70 nm [130 km]
Radius of 34-knot winds SW quadrant: 70 nm [130 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:
Radius of Maximum Winds: 30 nm [55 km]
Dvorak Intensity Code: T3.0/3.0/D1.5/24HRS STT:D1.0/12HRS
Pressure of outermost isobar: 1002 hPa
Radius of outermost closed isobar: 240 nm [445 km]
Storm Depth: Deep
FORECAST DATA
Date/Time : Location : Loc. Accuracy: Max Wind : Central Pressure
[UTC] : degrees : nm [km]: knots[km/h]: hPa
+12: 13/1800: 18.0S 114.7E: 050 [095]: 040 [075]: 991
+24: 14/0600: 17.2S 114.1E: 080 [150]: 050 [095]: 985
+36: 14/1800: 16.8S 114.3E: 110 [210]: 055 [100]: 980
+48: 15/0600: 17.2S 114.8E: 145 [270]: 060 [110]: 978
+60: 15/1800: 17.8S 116.1E: 190 [355]: 065 [120]: 975
+72: 16/0600: 18.9S 117.6E: 240 [445]: 075 [140]: 964
REMARKS:
Tropical Cyclone Lua has formed off the Pilbara coast. The system intensified
overnight with very deep convection persisting near the low level centre during
the day. Curvature has improved in an environment of low vertical wind shear.

Dvorak DT has hovered around 2.5 to 3.0 during the morning with a CI of 3.0
supported by MET. Recent ASCAT imagery showed marginal gales in the SE quadrant
and hence max winds have been set at 35 knots [10 min].

Movement is very slight with the steering balanced between an upper ridge to the
southwest and strengthening monsoonal northwesterlies to the north. A slow
motion to the north is forecast through 48 hours then a southeasterly track is
forecast for the following days towards the east Pilbara coast as the ridge
weakens and the monsoon intensifies. There is general agreement across model
guidance for this scenario.

Steady intensification is forecast under the influence of low wind shear and
warm SSTs, although SSTs may cool owing to upwelling with the slow motion. NWP
indicate a broad system which would indicate rapid intensification is less
likely. A broad area of monsoonal gales is expected to develop north of the
centre by Thursday.

Copyright Commonwealth of Australia
==
The next bulletin for this system will be issued by: 13/1300 UTC by Perth TCWC.

[HURAKAN]

WTXS32 PGTW 130900
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE 17S (LUA) WARNING NR 001//
RMKS/
1. TROPICAL CYCLONE 17S (LUA) 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:
130600Z --- NEAR 18.4S 115.0E
MOVEMENT PAST SIX HOURS - 300 DEGREES AT 02 KTS
POSITION ACCURATE TO WITHIN 060 NM
POSITION BASED ON CENTER LOCATED BY A COMBINATION OF
SATELLITE AND SYNOPTIC DATA
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
REPEAT POSIT: 18.4S 115.0E
---
FORECASTS:
12 HRS, VALID AT:
131800Z --- 18.0S 114.5E
MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT
070 NM SOUTHEAST QUADRANT
070 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 315 DEG/ 04 KTS
---
24 HRS, VALID AT:
140600Z --- 17.4S 113.9E
MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 060 NM NORTHEAST QUADRANT
095 NM SOUTHEAST QUADRANT
095 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 015 DEG/ 04 KTS
---
36 HRS, VALID AT:
141800Z --- 16.7S 114.1E
MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 025 NM NORTHEAST QUADRANT
025 NM SOUTHEAST QUADRANT
025 NM SOUTHWEST QUADRANT
025 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT
085 NM SOUTHEAST QUADRANT
095 NM SOUTHWEST QUADRANT
095 NM NORTHWEST QUADRANT
VECTOR TO 48 HR POSIT: 120 DEG/ 04 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
150600Z --- 17.1S 114.9E
MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 040 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
035 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 060 NM NORTHEAST QUADRANT
055 NM SOUTHEAST QUADRANT
085 NM SOUTHWEST QUADRANT
120 NM NORTHWEST QUADRANT
VECTOR TO 72 HR POSIT: 125 DEG/ 08 KTS
---
72 HRS, VALID AT:
160600Z --- 18.9S 117.6E
MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 040 NM NORTHEAST QUADRANT
035 NM SOUTHEAST QUADRANT
040 NM SOUTHWEST QUADRANT
045 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 090 NM NORTHEAST QUADRANT
075 NM SOUTHEAST QUADRANT
080 NM SOUTHWEST QUADRANT
095 NM NORTHWEST QUADRANT
VECTOR TO 96 HR POSIT: 135 DEG/ 11 KTS
---
LONG RANGE OUTLOOK:
---
96 HRS, VALID AT:
170600Z --- 22.0S 120.9E
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND
---
REMARKS:
130900Z POSITION NEAR 18.3S 114.9E.
TROPICAL CYCLONE (TC) 17S, (LUA), LOCATED APPROXIMATELY 240 NM WEST-
NORTHWEST OF PORT HEDLAND, AUSTRALIA, HAS TRACKED WEST-NORTHWESTWARD
AT 02 KNOTS OVER THE PAST SIX HOURS. ANIMATED MULTISPECTRAL
SATELLITE IMAGERY SHOWS SIGNIFICANT CONSOLIDATION AND DEEPENING
CONVECTION AROUND THE LOW LEVEL CIRCULATION CENTER (LLCC). THE
CURRENT INTENSITY IS BASED ON AN AVERAGE OF DVORAK ESTIMATES FROM
PGTW, APRF, AND KNES, WHICH RANGE FROM 30 TO 45 KNOTS AND ARE
RISING. TWO SHIP REPORTS JUST SOUTH OF THE SYSTEM CENTER AND A
130202Z ASCAT IMAGE ALSO SUPPORT A 35 KNOT INTENSITY. THE ASCAT
IMAGE ALSO REVEALS HIGHER WINDS OVER THE SOUTHERN SEMICIRCLE. A
122226Z SSMI IMAGE SHOWS TIGHTLY CURVED BANDING SURROUNDING THE LLCC
ON THREE SIDES AND GENERALLY GOOD SYMMETRY. ANIMATED WATER VAPOR
IMAGERY INDICATES DUAL CHANNEL OUTFLOW, WITH A SUPERB EQUATORWARD
CHANNEL VENTING MOISTURE ACROSS THE EQUATOR AND INTO THE BAY OF
BENGAL. THERE IS, HOWEVER, A ZONE OF SUBSIDENCE BETWEEN TC 17S AND
THE DEVELOPING CYCLONE OFF-SHORE OF AUSTRALIA'S TOP END. THE 130000Z
PGTW UPPER LEVEL STREAMLINE ANALYSIS DEPICTS TC 17S JUST BARELY TO
THE NORTH OF THE SUBTROPICAL RIDGE AXIS IN A REGION OF APPROXIMATELY
10 KNOTS OF VERTICAL WIND SHEAR. SEA SURFACE TEMPERATURES IN THE
REGION ARE 29 TO 30 DEGREES. SYSTEM MOTION HAS BEEN SLOW AND ERRATIC
DUE TO WEAK AND COMPETING STEERING INFLUENCES ON EITHER SIDE OF THE
SYSTEM. A MID-LEVEL ANTICYCLONE CENTERED NEAR 25S 105E HAS BEEN
DOMINATING RECENTLY AND WILL CONTINUE TO NUDGE THE STORM TO THE WEST-
NORTHWEST OVER THE SHORT TERM. BY TAU 48 THE SUBTROPICAL RIDGE WILL
RETROGRADE DEEPER INTO THE SOUTH INDIAN OCEAN AND THE NEAR
EQUATORIAL RIDGE (NER) WILL BUILD OVER THE TIMOR SEA, SHIFTING THE
DOMINANT STEERING FORCE TO THE NER, WHICH WILL CAUSE THE STORM TO
DOUBLE-BACK TOWARDS THE PORT HEDLAND REGION. THE ALONG-TRACK
VERTICAL WIND SHEAR PROFILE INDICATES THAT TC 17S WILL INTENSIFY
SLOWLY AND STEADILY. EARLY TRACK AND INTENSITY GUIDANCE IS IN DECENT
AGREEMENT, BUT THE WEAK STEERING ENVIRONMENT AND RELATIVELY COMPLEX
VERTICAL WIND SHEAR PATTERN MAKES FOR BELOW AVERAGE CONFIDENCE IN
THE EXTENDED RANGE FORECAST. THIS WARNING SUPERSEDES AND CANCELS REF
A, JOINT TYPHOON WRNCEN 122251Z MAR 12 TROPICAL CYCLONE FORMATION
ALERT (WTXS22 PGTW 122300) MAXIMUM SIGNIFICANT WAVE HEIGHT AT
130600Z IS 12 FEET. NEXT WARNINGS AT 132100Z AND 140900Z.//
NNNN