Cyclone Pat

Category 10 South Pacific cyclone in 2010

Severe Tropical Cyclone Pat
Cyclone Pat strengthening on February 9
Meteorological history
FormedFebruary 6, 2010
DissipatedFebruary 12, 2010
Category 3 severe tropical cyclone
10-minute sustained (FMS)
Highest winds140 km/h (85 mph)
Lowest pressure960 hPa (mbar); 28.35 inHg
Category 2-equivalent tropical cyclone
1-minute sustained (SSHWS/JTWC)
Highest winds165 km/h (105 mph)
Overall effects
FatalitiesNone
Damage$13.7 million (2010 USD)
Areas affectedCook Islands, particularly Aitutaki
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Part of the 2009–10 South Pacific cyclone season

Severe Tropical Cyclone Pat was a small but strong tropical cyclone that passed directly over Aitutaki,[nb 1] Cook Islands, in southern Pacific Ocean on February 10, 2010.[nb 2] Part of a series of storms to impact the group of islands early that year,[3] Pat was first identified as a tropical depression on February 6 well to the northeast of the Samoan Islands. The storm steadily organized as it moved generally southeast, becoming a tropical cyclone on February 8. Turning to the south, intensification began in earnest and the system acquired hurricane-force winds within 48 hours of being named. The 445 km (275 mi) wide system displayed annular characteristics and a 19 km (12 mi) wide eye. Pat reached its peak strength early on February 10 as a severe tropical cyclone with winds of 140 km/h (85 mph) and a barometric pressure of 960 mbar (hPa; 28.35 inHg).[nb 3] Hours later it struck Aitutaki, producing gusts in excess of 185 km/h (115 mph) on the island. Hostile wind shear then prompted rapid weakening of the cyclone. The system degraded below gale-intensity on February 11, just 24 hours after it peaked, and was last noted early on February 12.

Battering Aitutaki with wind gusts in excess of 185 km/h (115 mph), Cyclone Pat devastated the island. Approximately 78 percent of homes were damaged, with 72 structures destroyed. The electrical grid was left completely offline and supply of water was largely lost. Agriculture also experienced tremendous impact, with most crops completely lost. Damage on Aitutaki amounted to US$13.7 million;[nb 4] however, casualties were minimal with only eight minor injuries reported. Recovery efforts began immediately after the storm, with the Red Cross and the Government of New Zealand aiding the local government. A reconstruction plan was enacted by the Cook Islands within a month and subsequently funded by New Zealand. Owing to its destructive effects, the name Pat was later retired and replaced with Pili.[4]

Meteorological history

Map plotting the storm's track and intensity, according to the Saffir–Simpson scale
  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
circle Tropical cyclone
square Subtropical cyclone
triangle Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression