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User:Jason Rees/Nisha-Orama

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Severe Tropical Cyclone Nisha-Orama
Category 4 severe tropical cyclone (Aus scale)
Category 3 tropical cyclone (SSHWS)
Satellite image of Cyclone Nisha-Orama near peak intensity
FormedFebruary 13, 1983 (1983-02-13)
DissipatedFebruary 28, 1983 (1983-02-28)
Highest winds10-minute sustained: 185 km/h (115 mph)
1-minute sustained: 185 km/h (115 mph)
Lowest pressure925 hPa (mbar); 27.32 inHg
Areas affectedFrench Polynesia
Part of the 1982–83 South Pacific cyclone season

Cyclone Nisha-Orama

Meteorological history

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During February 10, significant cloud activity started to appear along the 10th parallel south between the Northern Cook Islands and French Polynesia's Marquesas Islands. During February 13, the Fiji Meteorological Service reported that a tropical depression had formed within this area of significant cloud activity just to the north of the Marquesas Islands and had started to move south-westwards.[1]


Over the next four days the system maintained its intensity, before it made a sharp eastwards turn and started to develop further.[1] The system subsequently moved in a counter clockwise loop, which allowed it to develop further and it was declared to be a tropical cyclone and named Nisha by the FMS during February 22.[1] However, by the time Fiji had named it Nisha, the Tahiti Meteorological Service had named it Orama, which was retained in order to save any confusion to the local public.[1] Over the next day, the system started to move south-westwards, while it rapidly intensified, with the FMS estimating 10-minute sustained wind-speeds of 185 km/h (115 mph) during February 24.[1] During that day the system sharply turned south-eastwards and started to gradually weaken, before it was last noted during February 28, as it moved out of the FMS's area of responsibility, while equivalent to a modern-day category 1 tropical cyclone.[1]


Reanalysis efforts

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During 2014, Meteo France published the results of a reanalysis, they had undertaken into Severe Tropical Cyclone Nisha-Orama.[2] Within the reanalysis, they found that the system was the most intense to impact French Polynesia and had peaked with 10-minute sustained windspeeds of 228 km/h (142 mph) as well as a minimmum pressure of 898 hPa (26.52 inHg).[2] This would make it a Category 5 severe tropical cyclone on the Australian scale and a Very Intense Tropical Cyclone on the scale that Meteo France uses.[2] Karl Hoarau, Ludovic Chalonge, Florence Pirard and Daniel Peyrusaubes also reanalysed Nisha-Orama, within a study into Extreme tropical cyclone activities in the southern Pacific Ocean that was published in the Royal Meteorological Society's International Journal of Climatology.[3] They found that the systems intensity had been underestimated and estimated that Nisha-Orama had peaked on February 24, with 1-minute sustained winds of 285 km/h (180 mph).[3]

Effects

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The Tuamotu Archipelago was the worst hit area with around 30 of its Atolls, either seriously damaged or destroyed with a damage total of around US$1.7 million reported in two villages on Rangiroa.[1]

See also

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References

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  1. ^ a b c d e f g Prasad, Rajendra (April 8, 1983). Tropical Cyclone Nisha (Orama) Preliminary Report (Report). Fiji Meteorological Service.
  2. ^ a b c Laurent, Victoire; Varney, Patrick (2014). Historique des Cyclones de Polynesie Francaise [History of Cyclones in French Polynesia] (in French). Meteo France. ISBN 978-2-9522946-1-4.
  3. ^ a b Hoarau, Karl; Chalonge, Ludovic; Pirard, Florence; Peyrusaubes, Daniel (March 2018). "Extreme tropical cyclone activities in the southern Pacific Ocean". International Journal of Climatology. 38 (3): 1409–1420. Bibcode:2018IJCli..38.1409H. doi:10.1002/joc.5254. S2CID 133864648.
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