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Cyclone Wilma     19 January to 30 January 2011

Cyclone Wilma developed into a category 1 tropical cyclone on 20 January north west of Fiji and was a powerful tropical cyclone that affected the Samoan Islands, Tonga and New Zealand. Cyclone Wilma initially tracked eastward towards the Samoan Islands. On 22 January, the system took a sharp southward turn, bringing its centre directly over American Samoa the following day. After turning towards the southwest and accelerating, Wilma steadily intensified into a severe tropical cyclone before striking Tonga. Wilma reached its peak intensity on 26 January as a Category 4 cyclone with winds of 185 km/h (115 mph) and a barometric pressure of 930 hPa. Gradually re-curving towards the southeast, Wilma weakened quickly as it moved over cooler and by 27 January, it was downgraded to an extratropical cyclone early on 28 January. 

Extratropical Cylone Wilma affected parts of the Upper North Island with heavy rain and strong winds on 28 January. The main feature of Wilma was flooding with 150mm to 200mm reported in 24 hours causing slips and overflowing sewerage in many areas. A house was badly damaged on Waiheke Island as the result of a slip. 

 

  

Tropical summary

Name
Category 

Lowest pressure
Lowest land pressure

Mean Wind Speed 
Affected land

 
Wilma 
4
930 hPa
995 hpa

215 km/h (G- 250 km/h)
American Samoa, Tonga
Ex-TC summary

Name
Category 

Lowest pressure
Lowest land pressure

Mean Wind Speed 
Affected upper NI

 


Wilma
#
984 hPa
990 hPa

50 km/h (G- 80 km/h)
Northland, Auckland, Coromandel, Waikato, Gulf Islands, BOP
Wilma 2011 track.jpg
Wilma 2011 MSLP.jpg
Wilma 2011 Rainfall 1 hr.jpg
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