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1970–71 South Pacific cyclone season

Tropical cyclone season


Tropical cyclone season

FieldValue
BasinSPac
Year1971
Track1970-1971 South Pacific cyclone season summary.jpg
First storm formedDecember 15, 1970
Last storm dissipatedApril 19, 1971
Strongest storm nameLena
Strongest storm pressure980
Strongest storm winds50
Average wind speed10
Total disturbances6
Total hurricanes5
Total intense0
five seasons[1960s](1960s-south-pacific-cyclone-seasons), [1969–70](1969-70-south-pacific-cyclone-season), **1970–71**, [1971–72](1971-72-south-pacific-cyclone-season), [1972–73](1972-73-south-pacific-cyclone-season)
South Indian season1970–71 South-West Indian Ocean cyclone season
Australian season1970–71 Australian region cyclone season

The 1970–71 South Pacific cyclone season, in terms of severe tropical cyclones, was the least active season on record, with none of its six storms strengthening above Category 2 tropical cyclone intensity. It was a below average season, beginning late and ending early. The season officially began on November 15 and ended on April 30, but the first storm formed a month after that, on December 15. TOC

Seasonal summary

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AlignBars = early DateFormat = dd/mm/yyyy Period = from:01/10/1970 till:01/05/1971 TimeAxis = orientation:horizontal ScaleMinor = grid:black unit:month increment:1 start:01/10/1970 Colors = id:canvas value:gray(0.88) id:GP value:red id:TDi value:rgb(0,0.52,0.84) legend:Tropical_Disturbance id:TD value:rgb(0.43,0.76,0.92) legend:Tropical_Depression id:C1 value:rgb(0.3,1,1) legend:Category_1_=63-87_km/h(39-54_mph) id:C2 value:rgb(0.75,1,0.75) legend:Category_2_=88-142_km/h(55-74_mph) id:C3 value:rgb(1,0.85,0.55) legend:Category_3_=143-158-km/h(75-98_mph) id:C4 value:rgb(1,0.45,0.54) legend:Category_4_=159–204_km/h(99–127_mph) id:C5 value:rgb(0.55,0.46,0.9) legend:Category_5_=≥205_km/h(≥128_mph)

Backgroundcolors = canvas:canvas

BarData = barset:Hurricane bar:Month

PlotData= barset:Hurricane width:11 align:left fontsize:S shift:(4,-4) anchor:till

from:29/10/1970 till:30/10/1970 color:TD text:"Nora" from:15/12/1970 till:19/12/1970 color:C1 text:"Priscilla" from:30/12/1970 till:06/01/1971 color:C1 text:"Rosie" from:10/02/1971 till:17/02/1971 color:C1 text:"Dora" from:15/02/1971 till:23/02/1971 color:C1 text:"Ida" from:16/02/1971 till:01/03/1971 color:C1 text:"Fiona" from:13/03/1971 till:23/03/1971 color:C1 text:"Lena"

bar:Month width:5 align:center fontsize:S shift:(0,-20) anchor:middle color:canvas from:01/10/1970 till:01/11/1970 text:October from:01/11/1970 till:01/12/1970 text:November from:01/12/1970 till:01/01/1971 text:December from:01/01/1971 till:01/02/1971 text:January from:01/02/1971 till:01/03/1971 text:February from:01/03/1971 till:01/04/1971 text:March from:01/04/1971 till:01/05/1971 text:April TextData = pos:(569,23) text:"(For further details, please see" pos:(713,23) text:" scales)"

Systems

Tropical Cyclone Priscilla

|10-min winds=40

During December 15, a small tropical depression developed about 278 km to the north of Yasawa-i-Rara in Fiji's Yasawa Islands. Over the next day, the system drifted westwards, before it started to move southwards and intensify further. The system subsequently became equivalent to a modern-day category 1 tropical cyclone, with 10-minute sustained wind speeds of 75 km/h (45 mph) during December 17. During that day, the system passed about 95 km to the west of Nadi and started to move south-eastwards and passed well to the south of Ono-I-Lau during December 18. The system was last noted during the next day, after it had moved below 25S and out of the tropics. It was thought that the system caused gale-force winds in parts of Viti Levu, Vatulele, Kandavu and the Yasawa and Mamanutha group of islands.

Tropical Cyclone Rosie

|10-min winds=45 |1-min winds=55

Cyclone Rosie was a weak cyclone which existed in late December 1970 near New Caledonia.

Tropical Cyclone Ida

|10-min winds=46 |1-min winds=52

Cyclone Ida existed from 16 to 22 February 1971 in the Coral Sea.

Tropical Cyclone Fiona

|10-min winds=37 |1-min winds=42

Cyclone Fiona existed from 16 to 28 February 1971. It developed from remains of Cyclone Gertie, which was located in the Gulf of Carpentaria.

Tropical Cyclone Lena

|10-min winds=51 |1-min winds=58

Cyclone Lena existed from 13 to 20 March 1971 near New Caledonia.

Other systems

Tropical Depression Nora caused minor damage and gale-force winds over the Yasawa and Mamanuca islands, Viti-Levu as well as the Lomaiviti Islands, when it impacted Fiji between October 29–30.

Cyclone Dora formed in the Coral Sea east of Proserpine on February 10, 1971. It took a southeasterly track over the next four days, away from the Queensland coast, turning into a low pressure system well east of the Queensland/New South Wales border. On February 17, the system reintensified into a cyclone east of the Gold Coast, and it crossed the Queensland coast north of Brisbane at Redcliffe. Widespread structural damage was reported, with numerous power lines falling and roofs being uproofed.

During March 8, Tropical Cyclone Thelma impacted Western and Southwestern Fiji and caused flooding in Ba.

Seasonal effects

References

References

  1. Krishna, Ram. (January 4, 1981). "Publication No. 2: Tropical Cyclones in Fiji: November 1969 – April 1980". Fiji Meteorological Service.
  2. ["1970 Tropical Cyclone Priscilla (1970351S17176)"]({{IBTRACS url). International Best Track Archive for Climate Stewardship.
  3. Waygood, J.L.M.. (October 20, 1980). "Tropical Cyclones affecting Fiji: November 1969 to April 1980". Fiji Meteorological Service.
  4. McGree, Simon. (October 1, 2010). "Flooding in the Fiji Islands between 1840 and 2009". Risk Frontiers.
  5. ["1970 Tropical Cyclone (Storm) Rosie (1970364S15165)"]({{IBTRACS url). International Best Track Archive for Climate Stewardship.
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