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Meow

已升格一級熱帶氣旋，命名Quang，上望三級強烈熱帶氣旋。

At 1800 UTC Tropical Cyclone Quang was centred within 25 nautical miles of
latitude fourteen decimal eight south (14.8S)
longitude one hundred and ten decimal zero east (110.0E)
Recent movement : west southwest at 8 knots
Maximum winds   : 40 knots
Central pressure: 997 hPa

甜心

t02436

JTWC升評Medium

B. TROPICAL DISTURBANCE SUMMARY:
      (1) THE AREA OF CONVECTION PREVIOUSLY LOCATED NEAR 11.8S
113.4E, IS NOW LOCATED NEAR 13.0S 113.3E, APPROXIMATELY 575 NM NORTH
OF LEARMONTH, AUSTRALIA. ANIMATED ENHANCED INFRARED SATELLITE
IMAGERY CONTINUES TO DEPICT A CONSOLIDATING LOW-LEVEL CIRCULATION
CENTER (LLCC) WITH GOOD CONVECTIVE SPIRAL BANDING WRAPPING INTO THE
CLOUD SYSTEM CENTER. A 271401Z METOP-B MICROWAVE IMAGE REVEALS
CONVECTIVE BANDING OVER THE SOUTHERN SEMI-CIRCLE WRAPPING INTO THE
LLCC. UPPER-LEVEL ANALYSIS INDICATES THE DISTURBANCE IS LOCATED IN A
FAVORABLE ENVIRONMENT WITH LOW TO MODERATE (10 TO 15 KNOT) VERTICAL
WIND SHEAR AND EXCELLENT POLEWARD OUTFLOW. MAXIMUM SUSTAINED SURFACE
WINDS ARE ESTIMATED AT 20 TO 25 KNOTS. MINIMUM SEA LEVEL PRESSURE IS
ESTIMATED TO BE NEAR 1005 MB. DUE TO PERSISTENT CONVECTION AND
IMPROVED ORGANIZATION, THE POTENTIAL FOR THE DEVELOPMENT OF A
SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS IS UPGRADED TO
MEDIUM.

BoM準備編號

IDW24000
Australian Government Bureau of Meteorology
Western Australia

TROPICAL CYCLONE INFORMATION BULLETIN
Issued at 9:42 am WST on Tuesday 28 April 2015
BY THE BUREAU OF METEOROLOGY
TROPICAL CYCLONE WARNING CENTRE PERTH

A Tropical Low was located at 8 am WST near 13.8S 112.7E,
that is 920 km north of Exmouth and moving southwest at 16 kilometres per hour.
The system is not expected to affect the WA mainland in the next 48 hours.

The next Information Bulletin will be issued at 3 pm WST.

補充BoM首報
巔峰上望澳式C2

IDW27600
TROPICAL CYCLONE TECHNICAL BULLETIN: AUSTRALIA - WESTERN REGION
Issued by PERTH TROPICAL CYCLONE WARNING CENTRE
at: 0254 UTC 28/04/2015
Name: Tropical Low  
Identifier: 21U
Data At: 0000 UTC
Latitude: 13.8S
Longitude: 112.7E
Location Accuracy: within 20 nm [35 km]
Movement Towards: southwest [230 deg]
Speed of Movement: 8 knots [16 km/h]
Maximum 10-Minute Wind: 35 knots [65 km/h]
Maximum 3-Second Wind Gust: 50 knots [95 km/h]
Central Pressure: 1002 hPa
Radius of 34-knot winds NE quadrant:   
Radius of 34-knot winds SE quadrant: 120 nm [220 km]
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: 40 nm [75 km]
Dvorak Intensity Code:
Pressure of outermost isobar: 1008 hPa
Radius of outermost closed isobar: 150 nm [280 km]
FORECAST DATA
Date/Time    : Location    : Loc. Accuracy: Max Wind   : Central Pressure
[UTC]        : degrees     :      nm  [km]: knots[km/h]: hPa
+06:  28/0600: 14.1S 111.9E:     030 [060]:  035  [065]: 1000
+12:  28/1200: 14.4S 111.2E:     045 [080]:  035  [065]:  999
+18:  28/1800: 14.5S 110.8E:     055 [105]:  035  [065]:  998
+24:  29/0000: 14.7S 110.4E:     070 [130]:  040  [075]:  996
+36:  29/1200: 15.3S 109.8E:     090 [165]:  050  [095]:  990
+48:  30/0000: 16.3S 109.7E:     110 [200]:  055  [100]:  987
+60:  30/1200: 17.3S 110.3E:     130 [235]:  060  [110]:  984
+72:  01/0000: 18.2S 110.9E:     145 [270]:  050  [095]:  988
+96:  02/0000: 21.1S 111.8E:     190 [355]:  030  [055]: 1003
+120: 03/0000: 23.8S 113.8E:     280 [515]:  030  [055]: 1001
REMARKS:
Position of a tropical low near 13.8S 112.7E at 00Z was found using satellite
and microwave imagey, particulary the SSMIS 2330Z microwave scan. Rapidscat data
at 1312Z showed gales occurring in the southeastern quadrant, although these
were somewhat rain affected.

This system has rapidly developed over the past 24 hours. Dvorak analysis gave
DT of 2.5 which was adjusted to 2.0 for the FT/CI based on the MET and PT
adjustments.

Sea surface temperatures are above 29 degrees. Shear is low [about 10 knots on
CIMMS] and outflow is improving to the south as an upper trough approaches. The
environment is very favourable for further development in the next 24 to 48
hours. By Friday wind shear is expected to increase over the system and so it is
expected to weaken as it approaches the coast.

Copyright Commonwealth of Australia
==
The next bulletin for this system will be issued by: 28/0700 UTC by Perth TCWC.

t02436

JTWC評級Low

  B. TROPICAL DISTURBANCE SUMMARY:
      (1) AN AREA OF CONVECTION HAS PERSISTED NEAR 11.8S 113.4E,
APPROXIMATELY 620 NM NORTH OF LEARMONTH, AUSTRALIA. ANIMATED
MULTISPECTRAL SATELLITE IMAGERY DEPICTS A CONSOLIDATING LOW LEVEL
CIRCULATION CENTER (LLCC) WITH GOOD CONVECTIVE SPIRAL BANDING
WRAPPING INTO THE CLOUD SYSTEM CENTER. A 270713Z SSMI 85GHZ
MICROWAVE IMAGE SHOWS AN ELONGATED LLCC WITH FRAGMENTED CURVED
CONVECTIVE BANDING. AN OLDER 270216Z SCATTEROMETER PASS REVEALED 15
TO 20 KNOT WINDS ALONG THE EASTERN AND SOUTHERN PERIPHERY OF THE
SYSTEM. UPPER LEVEL ANALYSIS INDICATES A FAVORABLE ENVIRONMENT NORTH
OF THE RIDGE AXIS WITH LOW TO MODERATE (10-15 KNOT) VERTICAL WIND
SHEAR AND A GOOD POLEWARD OUTFLOW CHANNEL SUSTAINING CONVECTION.
MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 15 TO 20 KNOTS.
MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1007 MB. THE
POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE
WITHIN THE NEXT 24 HOURS IS LOW.