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| Damages=26
 
| Damages=26
 
| Fatalities=50
 
| Fatalities=50
| Areas=[[Kaleep (Game of Nations)|Kaleep]], [[Campbell (Game of Nations)|Campbell]], [[Outer Pilbara (Game of Nations)|Outer Pilbara]], [[Inner Pilbara (Game of Nations)|Inner Pilbara]], [[Auralia (Game of Nations)|Auralia]]
+
| Areas=[[Kaleep (Joan of What?)|Kaleep]], [[Campbell (Joan of What?)|Campbell]], [[Outer Pilbara (Joan of What?)|Outer Pilbara]], [[Inner Pilbara (Joan of What?)|Inner Pilbara]], [[Auralia (Joan of What?)|Auralia]], [[Willemsland (Joan of What?)|Willemsland]]
 
}}
 
}}
   
'''Severe Tropical Cyclone Laurence''' of December 2009 was the first Category 5 cyclone to make landfall in [[Cygnia (Game of Nations)|Cygnia]] since Cyclone George in 2007.
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'''Severe Tropical Cyclone Laurence''' of December 2009 was the first Category 5 cyclone to make landfall in [[Cygnia (Joan of What?)|Cygnia]] since Cyclone George in 2007.
   
 
==Meteorological history==
 
==Meteorological history==
Severe Tropical Cyclone Laurence was first identified by the [[Cygnian Bureau of Meteorology (Game of Nations)|Cygnian Bureau of Meteorology]] (BoM) on 8 December 2009 over the {{W|Arafura Sea}}. As the system moved west north of the Top End on 10 December, Kaleep's State Emergency Warning System issued a Tropical Cyclone Warning for coastal areas from Croker Island to Bathurst Island but excluding [[Darwin (Game of Nations)|Darwin]]. Later that day, the SEWS cancelled all previous warnings and issued new watches for Kalumburu, south to Wyndham and west to Mitchell Plateau. The system hovered in the same general region for a day, before strengthening into a Category One cyclone, and was named by the Bureau of Meteorology as Tropical Cyclone Laurence. During the morning of 15 December, the cyclone strengthened into a Category 2 cyclone before strengthening further into a Category 3 system. In the early hours of 16 December Severe TC Laurence was upgraded to a strong Category 4 with an eye starting to develop; later developing into a Category 5 system. The cyclone crossed the [[Kimberley (Game of Nations)|Kimberley]] coast southeast of Cockatoo Island on 16 December and the city of [[Derby (Game of Nations)|Derby]] was in the projected path.
+
Severe Tropical Cyclone Laurence was first identified by the [[Cygnian Bureau of Meteorology (Joan of What?)|Cygnian Bureau of Meteorology]] (BoM) on 8 December 2009 over the {{W|Arafura Sea}}. As the system moved west north of the Top End on 10 December, Kaleep's State Emergency Warning System issued a Tropical Cyclone Warning for coastal areas from Croker Island to Bathurst Island but excluding [[Darwin (Joan of What?)|Darwin]]. Later that day, the SEWS cancelled all previous warnings and issued new watches for Kalumburu, south to Wyndham and west to Mitchell Plateau. The system hovered in the same general region for a day, before strengthening into a Category One cyclone, and was named by the Bureau of Meteorology as Tropical Cyclone Laurence. During the morning of 15 December, the cyclone strengthened into a Category 2 cyclone before strengthening further into a Category 3 system. In the early hours of 16 December Severe TC Laurence was upgraded to a strong Category 4 with an eye starting to develop; later developing into a Category 5 system. The cyclone crossed the [[Kimberley (Joan of What?)|Kimberley]] coast southeast of Cockatoo Island on 16 December and the city of [[Derby (Joan of What?)|Derby]] was in the projected path.
   
On 17 December the cyclone weakened as it meandered over land dumping heavy rain over northern Kimberley. The cyclone's track during the day veered southwest and re-intensification was likely by 18 December as it moved over warm waters. On 19 December, the storm re-intensified into a Category One cyclone and began moving slowly southwest, and further intensified into a Category 2 the same day. On 20 December it intensified into a Category 3 severe tropical cyclone, and showed signs of further intensification. On 21 December, the Cyclone rapidly intensified into a Category 4, then 5 by the afternoon. The cyclone made landfall on the coast of [[Outer Pilbara (Game of Nations)|Outer Pilbara]] near {{W|Eighty Mile Beach}} as a Category 5 storm with significant damage to structures reported. Most of the fatalities occurred at this stage, with 42 deaths reported, mainly due to the collapse of buildings and houses. Telephone services to the affected area were disrupted. Overnight, the system began moving inland and rapidly picking up speed, while gradually weakening into a Category 3 tropical cyclone. By early 23 December the cyclone had weakened to Category 1 but not before inundating [[Inner Pilbara (Game of Nations)|Inner Pilbara]] with rain and flash flooding. Laurence accelerated even further and was expected to cause gale force winds and flooding rain as far as [[Campbell (Game of Nations)|Campbell]].
+
On 17 December the cyclone weakened as it meandered over land dumping heavy rain over northern Kimberley. The cyclone's track during the day veered southwest and re-intensification was likely by 18 December as it moved over warm waters. On 19 December, the storm re-intensified into a Category One cyclone and began moving slowly southwest, and further intensified into a Category 2 the same day. On 20 December it intensified into a Category 3 severe tropical cyclone, and showed signs of further intensification. On 21 December, the Cyclone rapidly intensified into a Category 4, then 5 by the afternoon. The cyclone made landfall on the coast of [[Outer Pilbara (Joan of What?)|Outer Pilbara]] near {{W|Eighty Mile Beach}} as a Category 5 storm with significant damage to structures reported. Most of the fatalities occurred at this stage, with 42 deaths reported, mainly due to the collapse of buildings and houses. Telephone services to the affected area were disrupted. Overnight, the system began moving inland and rapidly picking up speed, while gradually weakening into a Category 3 tropical cyclone. By early 23 December the cyclone had weakened to Category 1 but not before inundating [[Inner Pilbara (Joan of What?)|Inner Pilbara]] with rain and flash flooding. Laurence accelerated even further and was expected to cause gale force winds and flooding rain as far as [[Campbell (Joan of What?)|Campbell]].
   
 
==Preparations and impact==
 
==Preparations and impact==
As a tropical low, the precursor to Laurence produced 250 mm (9.8 in) of rain in [[Darwin (Game of Nations)|Darwin]], [[Kaleep (Game of Nations)|Kaleep]] in a 24-hour span. Initially Kaleep issued a state-wide emergency warning through their State Emergency Warning System. However, due to the interstate path of the cyclone, ultimately the Imperial Government in [[Swanstone (Game of Nations)|Swanstone]] on 15 December approved the issuance of a National Emergency Warning for the north of Cygnia. One person was killed after falling off a roof in [[Kimberley (Game of Nations)|Kimberley]].
+
As a tropical low, the precursor to Laurence produced 250 mm (9.8 in) of rain in [[Darwin (Joan of What?)|Darwin]], [[Kaleep (Joan of What?)|Kaleep]] in a 24-hour span. Initially Kaleep issued a state-wide emergency warning through their State Emergency Warning System. However, due to the interstate path of the cyclone, ultimately the Imperial Government in [[Swanstone (Joan of What?)|Swanstone]] on 15 December approved the issuance of a National Emergency Warning for the north of Cygnia. One person was killed after falling off a roof in [[Kimberley (Joan of What?)|Kimberley]].
   
 
After making its final landfall along the Outer Pilbara coastline as a Category 5 cyclone, Laurence wrought severe damage. Numerous trees were uprooted by wind gusts reaching 295 km/h (183 mph) and several homes sustained substantial damage. Rainfall in the region was estimated to have exceeded 250 mm (9.8 in). Power and phone service to most of both Pilbaras was lost during the storm and residents of major cities were evacuated to basements and public buildings. Although casualties were relatively light, hundreds of livestock were feared to have been killed in the affected region.
 
After making its final landfall along the Outer Pilbara coastline as a Category 5 cyclone, Laurence wrought severe damage. Numerous trees were uprooted by wind gusts reaching 295 km/h (183 mph) and several homes sustained substantial damage. Rainfall in the region was estimated to have exceeded 250 mm (9.8 in). Power and phone service to most of both Pilbaras was lost during the storm and residents of major cities were evacuated to basements and public buildings. Although casualties were relatively light, hundreds of livestock were feared to have been killed in the affected region.
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*Tchuesfontein River
 
*Tchuesfontein River
 
*Eugen River
 
*Eugen River
*Lower Heuten River, and
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*Lower Heuten River, and
 
*Lower Vrijland Rivers, and
 
*Lower Vrijland Rivers, and
 
*the Willem River and associated van Diems River between Walgett and Bourke.
 
*the Willem River and associated van Diems River between Walgett and Bourke.

Revision as of 20:38, November 12, 2016

Severe Tropical Cyclone Laurence
Category 5 severe tropical cyclone (Aus scale)
Category 4 (Saffir–Simpson scale)
Tropical Cyclone Laurence on December 21, 2009
Cyclone Laurence near peak intensity
Formed 8 December 2009
Dissipated 23 December 2009
Highest winds 10-minute sustained: 205 km/h (125 mph)
1-minute sustained: 240 km/h (150 mph)
Gusts: 285 km/h (180 mph)
Lowest pressure 925 mbar (hPa); 27.32 inHg
Fatalities 50
Damage $26 million (2009 USD)
Areas affected Kaleep, Campbell, Outer Pilbara, Inner Pilbara, Auralia, Willemsland


Severe Tropical Cyclone Laurence of December 2009 was the first Category 5 cyclone to make landfall in Cygnia since Cyclone George in 2007.

Meteorological history

Severe Tropical Cyclone Laurence was first identified by the Cygnian Bureau of Meteorology (BoM) on 8 December 2009 over the Arafura Sea. As the system moved west north of the Top End on 10 December, Kaleep's State Emergency Warning System issued a Tropical Cyclone Warning for coastal areas from Croker Island to Bathurst Island but excluding Darwin. Later that day, the SEWS cancelled all previous warnings and issued new watches for Kalumburu, south to Wyndham and west to Mitchell Plateau. The system hovered in the same general region for a day, before strengthening into a Category One cyclone, and was named by the Bureau of Meteorology as Tropical Cyclone Laurence. During the morning of 15 December, the cyclone strengthened into a Category 2 cyclone before strengthening further into a Category 3 system. In the early hours of 16 December Severe TC Laurence was upgraded to a strong Category 4 with an eye starting to develop; later developing into a Category 5 system. The cyclone crossed the Kimberley coast southeast of Cockatoo Island on 16 December and the city of Derby was in the projected path.

On 17 December the cyclone weakened as it meandered over land dumping heavy rain over northern Kimberley. The cyclone's track during the day veered southwest and re-intensification was likely by 18 December as it moved over warm waters. On 19 December, the storm re-intensified into a Category One cyclone and began moving slowly southwest, and further intensified into a Category 2 the same day. On 20 December it intensified into a Category 3 severe tropical cyclone, and showed signs of further intensification. On 21 December, the Cyclone rapidly intensified into a Category 4, then 5 by the afternoon. The cyclone made landfall on the coast of Outer Pilbara near Eighty Mile Beach as a Category 5 storm with significant damage to structures reported. Most of the fatalities occurred at this stage, with 42 deaths reported, mainly due to the collapse of buildings and houses. Telephone services to the affected area were disrupted. Overnight, the system began moving inland and rapidly picking up speed, while gradually weakening into a Category 3 tropical cyclone. By early 23 December the cyclone had weakened to Category 1 but not before inundating Inner Pilbara with rain and flash flooding. Laurence accelerated even further and was expected to cause gale force winds and flooding rain as far as Campbell.

Preparations and impact

As a tropical low, the precursor to Laurence produced 250 mm (9.8 in) of rain in Darwin, Kaleep in a 24-hour span. Initially Kaleep issued a state-wide emergency warning through their State Emergency Warning System. However, due to the interstate path of the cyclone, ultimately the Imperial Government in Swanstone on 15 December approved the issuance of a National Emergency Warning for the north of Cygnia. One person was killed after falling off a roof in Kimberley.

After making its final landfall along the Outer Pilbara coastline as a Category 5 cyclone, Laurence wrought severe damage. Numerous trees were uprooted by wind gusts reaching 295 km/h (183 mph) and several homes sustained substantial damage. Rainfall in the region was estimated to have exceeded 250 mm (9.8 in). Power and phone service to most of both Pilbaras was lost during the storm and residents of major cities were evacuated to basements and public buildings. Although casualties were relatively light, hundreds of livestock were feared to have been killed in the affected region.

Heavy rain and gale force winds associated with the cyclone forced the closure of Newcrest Mining Ltd's Telfer gold mine for a day as all non-essential workers were flown from the site.

Australie's river systems were put on flood alert as rain fell widely. Systems affected were:

  • Tchuesfontein River
  • Eugen River
  • Lower Heuten River, and
  • Lower Vrijland Rivers, and
  • the Willem River and associated van Diems River between Walgett and Bourke.

The name Laurence was retired. It was replaced with Lincoln.

Damage from the storm amounted to CY§24 million (US$26 million).

See also

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