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Cyclone Phethai

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Severe Cyclonic Storm Phethai
Severe cyclonic storm (IMD scale)
Tropical cyclone (SSHWS)
Cyclone Phethai north of Sri Lanka on December 15
FormedDecember 13, 2018
DissipatedDecember 18, 2018
(Post-tropical after December 17)
Highest winds3-minute sustained: 100 km/h (65 mph)
1-minute sustained: 100 km/h (65 mph)
Lowest pressure992 hPa (mbar); 29.29 inHg
Fatalities8 total
Damage$100 million (2018 USD)
Areas affectedSri Lanka, East India, Northeast India
Part of the 2018 North Indian Ocean cyclone season

Severe Cyclonic Storm Phethai was a tropical cyclone which affected some portions of Sri Lanka and India during December 2018. The fourteenth depression, ninth deep depression, seventh cyclonic storm, and fifth severe cyclonic storm of the 2018 North Indian Ocean cyclone season, Phethai developed from an area of low pressure that formed over the Bay of Bengal on December 13. Having forecasted not to develop significantly, the depression then strengthened to a deep depression later that day before becoming a cyclonic storm on December 15. Phethai further intensified and peaked to a severe cyclonic storm, the following day. The system then steadily weakened due to land interaction and increasing wind shear, before making landfall as a disorganized system over Andhra Pradesh on December 17. It degenerated to an area of low-pressure inland, the next day.

Phethai caused over eight fatalities during its path towards East India. Some rice crops and paddies were destroyed and flooded, while over 31,600 individuals were evacuated to different centers in Godavari District and Odisha. The total damages from the cyclone were finalized at $100 million (2018 USD).

Meteorological history

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

At 06:00 UTC on December 7, the India Meteorological Department (IMD) began to note in their bulletins that an area of low-pressure could significantly form over the Bay of Bengal over the next 48 hours.[1] The American-based Joint Typhoon Warning Center (JTWC) also began to monitor the developing system later that day.[2] The IMD later reported that a low-pressure area had formed over the Bay of Bengal, influenced by a trough of low pressure, at 12:00 UTC on December 9. The agency noted that conditions would be favorable for the system to develop further, due to the Madden–Julian oscillation phase being at a three. Over the next couple of days, the low-pressure area produced moderate to deep convection, with the IMD designating the system as a well—marked low-pressure area on December 11. At 3:00 UTC on December 13, the IMD upgraded the low-pressure area into a tropical depression, while located roughly 530 miles (855 km) east-southeast of Trincomalee, Sri Lanka.[1] At the same time, the JTWC issued a Tropical Cyclone Formation Alert (TCFA) on the system.[2]

The depression moved north-northwestward towards the coast of India for the next few days, being steered by an anticyclone over Southeast Asia. While doing so, the depression strengthened into a deep depression according to the IMD, by 18:00 UTC on December 13, while located about 645 miles (1,040 km) south-southeast of Chennai, Tamil Nadu. Deep convection associated with the system began to increase, while global prediction models suggested further strengthening.[1] The JTWC released their first warning on the depression at 6:00 UTC on December 15.[2] Just 9 hours later, the deep depression strengthened into a cyclonic storm, and was provided the name Phethai by the IMD, while located around 480 miles (770 km) south-southeast of Machilipatnam, Andhra Pradesh. The storm changed little in appearance over the next 26 hours, before being upgraded into a severe cyclonic storm, at 17:30 UTC the next day. At this time, Phethai reached its peak intensity with 1–minute sustained winds of around 65 mph (105 km/h), and a minimum pressure of 992 mbar (29.29 inHg). The cyclone then maintained this intensity for over 12 hours before weakening due to increasing wind shear. By 6:00 UTC on December 17, the structure of the storm began to disorganize, with the center becoming ill-defined. Shortly afterwards, Phethai moved onshore in Andhra Pradesh, near the town of Yanam, just a few hours later.[1][3]

Just an hour later, the JTWC issued their final warning on Phethai, while it was located just off the coast of Eastern India.[2] The IMD soon reported that the cyclone had weakened into a deep depression, inland over Andhra Pradesh, at 15:00 UTC that same day. The depression remained disorganized as it moved across Eastern India, making a second landfall in the country near Tuni. Phethai continued to weaken inland, being downgraded into a depression by 19:30 UTC that day. The IMD issued their final bulletin on the depression at 3:00 UTC the following day, as it degenerated into an area of low pressure over the northwestern Bay of Bengal, while producing minimal convection.[1] Although, dissipation was later corrected to 0:00 UTC.[3]

Preparations

See also: Cyclone Titli

Cyclone Phethai affected areas still recovering from the impacts of cyclones Daye, Titli, and Gaja.[4] Ahead of the storm, boats were prohibited from leaving port with fishing activities halted.[5]

Cyclone Phethai making landfall near Yanam on December 17

Roughly 10 shelters were opened within Andhra Pradesh. Over 2,000 electrical workers were assembled to help restore power in Phethai's aftermath. Police and firefighters formed special crews to help with debris removal from streets. Firefighters also prepared boats and lifejackets, with the National Disaster Response Force and State Disaster Response Force assembling seven rescue teams. Marketing departments arranged vegetables and necessities to provide to people staying at shelters. The Indian Coast Guard kept ships and aircraft along the country's east coast to help with aid efforts following the cyclone.[5]

Over 10,000 people prepared for disaster response as the storm neared. Numerous flights heading to Visakhapatnam were cancelled, with trains being halted.[6] N. Chandrababu Naidu, the chief minister of Andhra Pradesh, hosted a teleconference with the collector's of four districts in the state, where cyclone preparations were planned and discussed. Paddy crops were attempted to be saved by farmers in the Krishna and Godavari river deltas.[7] Roughly 20,000 people were evacuated ahead of the cyclone in the nearby Godavari District.[8] Within Krishna district, 68 relief centers, 15 health teams, and 155 firefighters were put on standby, as local officials prepared for the storm. The Rural Water Supply setup 3 water tankers in each of the district's villages, while also producing more than 500 sandbags. Machinery was also readied to help clear downed trees. While electrical departments ordered crews to be stationed every 6 miles (10 km), to quickly restore power.[9][10]

In Odisha, roughly 11,600 residents were evacuated from the Gajapati district. These residents were evacuated due to the damage remaining from Cyclone Titli, just two months previously.[11] Farmers in the state were asked to take measures to protect their crops from the results of heavy rainfall.[12] The India Meteorological Department (IMD) warned of a chance of heavy rains in the northern part of Tamil Nadu.[13]

Some fishing communities were advised to exercise cautions when fishing from Trincomalee to Mannar via Kankesanthurai in Sri Lanka.[14] Gusty winds and some squally rainfall were also expected in these areas.[14]

Impact

Conditions before and after the passage of Phethai in Visakhapatnam.

Showers and thunderstorms associated with Phethai affected Sri Lanka during its development.[15] After moving onshore, Phethai brought torrential rainfall and strong winds in Andhra Pradesh which downed trees and electrical lines.[16] A peak precipitation accumulation of 156.5 mm (6.16 in) was reported in the city of Ninnimamidivalasa in Visakhapatnam,[17] while the village of Pachipenta recorded a rainfall amount of 136 mm.[18] During the storm, seven fishermen went missing offshore the city.[19]

A 40-year-old man was killed after a boulder crashed through his roof in Vijayawada. Another man in the city was hurtled down a small hill due to heavy rainfall, killing him. A 68-year-old woman was also killed in Pallepalem. In the East Godavari district, streets in more than 50 locations were left impassible but were quickly cleared. Power outages were reported in 99 villages within the district.[17][20]

In the town of Amalapuram, a rare phenomenon of fish rain was reported along a canal on December 17. A video of the incident went viral on social media, showing more than 100 bodies of fish on land near the canal. A possible cause of this occurrence was high wind bringing the bodies of fish and frogs onshore.[21]

Aftermath

Following the cyclone, the Government of Odisha began to assess damage to crops in the state.[22] Some assistance would be given to the farmers regarding the major damages to rice paddies from the aftermath of the cyclone.[citation needed]

See also

References

  1. ^ a b c d e "Cyclone Phethai Archive Bulletin" (PDF). India Meteorological Department. Retrieved April 4, 2021.
  2. ^ a b c d "Annual Tropical Cyclone Report 2018" (PDF). Joint Typhoon Warning Center. Retrieved April 4, 2021.
  3. ^ a b "2019 Best Track Archive". India Meteorological Department. Retrieved February 3, 2021.
  4. ^ "After Gaja, Andhra Pradesh now braces for Cyclone Phethai". Mint. December 15, 2018. Retrieved February 6, 2021.
  5. ^ a b "Krishna braces for Phethai". The Hindu. December 15, 2018. Retrieved February 2, 2021.
  6. ^ "Cyclone Phethai in India". Disasters Charter. December 17, 2018. Retrieved February 2, 2021.
  7. ^ TNN (December 16, 2018). "Cyclone Phethai to Hit Kakinada, AP, Today Afternoon; 350 Villages on High Alert". The Weather Channel India. Retrieved February 2, 2021.
  8. ^ "Cyclone Phethai Highlights: 20,000 people shifted to relief camps, storm weakens". The Indian Express. December 18, 2018. Retrieved February 3, 2021.
  9. ^ "Cyclone Phethai to hit Andhra Pradesh on December 17; state on high alert". MyNation. December 15, 2018. Retrieved February 4, 2021.
  10. ^ VKL Gayatri (December 16, 2018). "Cyclone Phethai: Andhra Pradesh govt. gears up all its wings to attend emergencies". The Hans India. Retrieved February 4, 2021.
  11. ^ Press Trust of India (December 18, 2018). "Over 11,000 Evacuated In Odisha As Cyclone Phethai Hits Andhra". NDTV. Retrieved February 2, 2021.
  12. ^ "Odisha government evacuates 11,600 people as Cyclone Phethai makes landfall in neighbouring Andhra Pradesh". India TV News. December 18, 2018. Retrieved February 4, 2021.
  13. ^ "Cyclone Phethai: IMD predicts heavy rain in coastal parts of Andhra Pradesh, Tamil Nadu on weekend". Scroll.in. December 13, 2018. Retrieved March 7, 2021.
  14. ^ a b "Cyclonic storm 'Phethai' moving away from Sri Lanka". www.news.lk-gb. Retrieved 2021-04-07.
  15. ^ "As Phethai cyclone intensifies: Fishermen warned". Daily Mirror. December 16, 2018. Retrieved February 3, 2021.
  16. ^ "Deadly Cyclone Phethai makes landfall in India". Al Jazeera. December 18, 2018. Retrieved February 5, 2021.
  17. ^ a b Charan Teja (December 18, 2018). "Cyclone Phethai claims two lives in Andhra, weakens after making landfall". The News Mir. Retrieved March 7, 2021.
  18. ^ "Deadly Cyclone Phethai makes landfall in India". www.aljazeera.com. Retrieved 2021-04-07.
  19. ^ Press Trust of India (December 18, 2018). "Cyclone Phethai leaves one dead, seven missing in Andhra Pradesh; 'weakened' storm now moving towards Odisha". Firstpost. Retrieved March 7, 2021.
  20. ^ PTI (December 18, 2018). "One Killed as Cyclone Phethai Storms Through Andhra Pradesh". The Wire. Retrieved March 7, 2021.
  21. ^ V Kamalakara Rao (December 17, 2018). "Cyclone Phethai Showers Fish on Andhra's Amalapuram". The Weather Channel India. Retrieved March 7, 2021.
  22. ^ Press Trust of India (December 19, 2018). "Odisha to assess crop damage caused by Cyclone Phethai". Business Standard. Retrieved March 7, 2021.
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