IDQ20018
TROPICAL CYCLONE TECHNICAL BULLETIN: AUSTRALIA - EASTERN REGION
Issued by
Brisbane TROPICAL CYCLONE WARNING CENTRE
at: 2308 UTC 20/12/2011
Name: Tropical Low
Identifier: 02U
Data At: 1800 UTC
Latitude: 14.1S
Longitude: 155.7E
Location Accuracy: within 60 nm [110 km]
Movement Towards: east southeast [112 deg]
Speed of Movement: 5 knots [10 km/h]
Maximum 10-Minute Wind: 25 knots [45 km/h]
Maximum 3-Second Wind Gust: 45 knots [85 km/h]
Central Pressure: 1000 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:
Dvorak Intensity Code: T2.0/2.0/D0.5/24HRS
Pressure of outermost
isobar: 1004 hPa
Radius of outermost closed
isobar: 300 nm [555 km]
Storm Depth: Deep
FORECAST DATA
Date/Time : Location : Loc. Accuracy: Max Wind : Central Pressure
[UTC] : degrees : nm [km]: knots[km/h]: hPa
+12: 21/0600: 15.2S 156.2E: 090 [165]: 030 [055]: 997
+24: 21/1800: 16.3S 156.5E: 120 [220]: 035 [065]: 996
+36: 22/0600: 17.5S 156.9E: 150 [280]: 050 [095]: 987
+48: 22/1800: 18.4S 156.7E: 185 [345]: 060 [110]: 978
+60: 23/0600: 19.4S 156.8E: 230 [430]: 050 [095]: 984
+72: 23/1800: 19.9S 157.4E: 280 [520]: 035 [065]: 995
REMARKS:
Dvorak analysis based on a curved band pattern with 0.3 degree wrap, giving DT
of 2.0. MT and PT agree. FT based on MT as DT is not clear.
Organisation has improved slightly and convection has consolidated in the
vicinity of the low in the last 24 hours. The low appears to be in a favourable
environment for development with low wind shear and sea surface temperatures
around 30 degrees.
However, an upper trough is expected to amplify across eastern Australia on
Thursday, which will increase the wind shear across the low into Friday. The
increase in the wind shear is likely to hinder development from Friday onwards,
though computer model guidance indicates that intensification may still occur
while the system possibly undergoes extra tropical transition.
Copyright Commonwealth of Australia
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The next bulletin for this system will be issued by: 21/0700 UTC by
BrisbaneTCWC.