Cyclone Ockhi

Category 3 tropical cyclone that struck Sri Lanka and India in 2017

Very Severe Cyclonic Storm Ockhi
Cyclone Ockhi near peak intensity west of Lakshadweep on December 2
Meteorological history
FormedNovember 29, 2017
ExtratropicalDecember 4, 2017
DissipatedDecember 6, 2017
Very severe cyclonic storm
3-minute sustained (IMD)
Highest winds155 km/h (100 mph)
Lowest pressure976 hPa (mbar); 28.82 inHg
Category 3-equivalent tropical cyclone
1-minute sustained (SSHWS/JTWC)
Highest winds185 km/h (115 mph)
Lowest pressure948 hPa (mbar); 27.99 inHg
Overall effects
Fatalities318
Missing141
Damage$920 million (2017 USD)
Areas affectedSouthern India, Sri Lanka and Maldives
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Part of the 2017 North Indian Ocean cyclone season

Very Severe Cyclonic Storm Ockhi[nb 1] was a strong tropical cyclone that devastated parts of Sri Lanka and India in 2017, and was the most intense tropical cyclone in the Arabian Sea since Cyclone Megh in 2015. The ninth depression, and the third and strongest named storm of the 2017 North Indian Ocean cyclone season, Ockhi originated from an area of low pressure that formed over the southwest Bay of Bengal on November 28.[2] The storm organized into a Depression off southeast coast of Sri Lanka on November 29, causing damage to property and life in Sri Lanka while passing by.[2] Due to high atmospheric moisture and warmer oceanic surface temperature between Sri Lanka and Kanyakumari (Cape Comorin) in mainland India, Ockhi intensified into a cyclonic storm on November 30.[2]

While near Kanyakumari in mainland India, Ockhi changed course and intensified while heading towards Lakshadweep in the Arabian Sea.[3] Ockhi impacted Lakshadweep on December 2, uprooting coconut trees and causing extensive damage to houses, power lines and other infrastructure on the islands.[4] Ockhi weakened into a well-marked low near the south coast of Gujarat, India, on December 6, before crossing the coastline and dissipating shortly afterward.[5] In its entirety, Ockhi left a trail of massive destruction in Sri Lanka, Lakshadweep, South India, and The Maldives, as it strengthened from a depression to a mature cyclone. Though it rapidly weakened during its final stages over the Arabian Sea, it caused heavy rainfall along the western coast of India, particularly in Maharashtra and Gujarat. Ockhi caused at least 245 fatalities, including 218 in India[6] and 27 in Sri Lanka,[7] and the storm left at least 550 people missing, mainly fishermen.[8]

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