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South Pacific cyclone in 1986 From Wikipedia, the free encyclopedia

Severe Tropical Cyclone Ima was

Formed5 February 1986 (1986-02-05)
Extratropical14 February 1986
Dissipated16 February 1986 (1986-02-16)
Highestwinds165 km/h (105 mph)
Quick facts Meteorological history, Formed ...
Severe Tropical Cyclone Ima
Cyclone Ima approaching French Polynesia on 8 February
Meteorological history
Formed5 February 1986 (1986-02-05)
Extratropical14 February 1986
Dissipated16 February 1986 (1986-02-16)
Category 4 severe tropical cyclone
10-minute sustained (MetService)
Highest winds165 km/h (105 mph)
Lowest pressure940 hPa (mbar); 27.76 inHg
Category 1-equivalent tropical cyclone
1-minute sustained (SSHWS/JTWC)
Highest winds140 km/h (85 mph)
Lowest pressure967 hPa (mbar); 28.56 inHg
Overall effects
FatalitiesNone
IBTrACS

Part of the 1985–86 South Pacific cyclone season
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Meteorological history

Map plotting the storm's track and intensity, according to the Saffir–Simpson scale
Map key
  Tropical depression (≤38 mph, ≤62 km/h)
  Tropical storm (39–73 mph, 63–118 km/h)
  Category 1 (74–95 mph, 119–153 km/h)
  Category 2 (96–110 mph, 154–177 km/h)
  Category 3 (111–129 mph, 178–208 km/h)
  Category 4 (130–156 mph, 209–251 km/h)
  Category 5 (≥157 mph, ≥252 km/h)
  Unknown
Storm type
triangle Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

On February 5, the Fiji Meteorological Service reported that a tropical depression had developed within the South Pacific Convergence Zone to the east of Keppel Island in Tonga.[1][2] During that day, the system developed gale-force winds in its northern quadrant, as it moved south-eastwards along a trough of low pressure towards the southern Cook Islands.[1] According to the FMS, the depression maintained its intensity until after 03:00 UTC on February 6 (17:00 UTC-10, February 5), when it started to rapidly transform into a tropical cyclone; however, they were not able to adequately monitor this transformation because of a lack of satellite imagery.[1] At around 10:30 UTC (20:30 UTC-10), the FMS realised that the system had developed into a tropical cyclone with 10-minute sustained winds of 110 km/h (70 mph) and named it Ima, while it was located about 295 km (185 mi) to the northeast of the island of Palmerston in the southern Cook Islands.[1][3] Ima continued to intensify as it moved south-eastwards before it was classified as a hurricane by the FMS at 12:00 UTC (02:00 UTC-10), while the Naval Western Oceanography Center designated it as Tropical Cyclone 15P as they initiated advisories on the system.[1][3][4] Later that day, Ima passed directly over Palmerston at around 15:00 UTC (05:00 UTC-10), where hurricane-force winds of 185 km/h (115 mph) and wind gusts of 280 km/h (175 mph) were reported.[1][5]

After passing over Palmerston, Ima continued to intensify as it moved southeastwards and passed within 55 km (35 mi) to the north of Aitutaki at around 07:00 UTC on February 7, (17:00 UTC-10, February 6).[1][3] Over the next couple of days, the system continued to move south-eastwards through the southern Cook Islands and was tracked by the French frigate Balny developed a well defined eye

Effects

Samoan Islands

Cook Islands

French Polynesia

See also

References

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