Cyclone Nivar

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Very Severe Cyclonic Storm Nivar
Very severe cyclonic storm (IMD scale)
Category 1 tropical cyclone (SSHWS)
Nivar 2020-11-25 0815Z.jpg
Cyclone Nivar at peak strength on November 25
FormedNovember 23, 2020
DissipatedNovember 27, 2020
Highest winds3-minute sustained: 120 km/h (75 mph)
1-minute sustained: 130 km/h (80 mph)
Lowest pressure980 hPa (mbar); 28.94 inHg
Fatalities14 total
Damage$600 million (2020 USD)
Areas affectedSri Lanka, Andhra Pradesh, Tamil Nadu, Puducherry
Part of the 2020 North Indian Ocean cyclone season

Very Severe Cyclonic Storm Nivar was a tropical cyclone which brought severe impacts to portions of Tamil Nadu and Andhra Pradesh in late November 2020. The eighth depression and fourth named storm of the 2020 North Indian Ocean cyclone season, Nivar originated from a disturbance in the Intertropical Convergence Zone. The disturbance gradually organized and on November 23, both the Joint Typhoon Warning Center (JTWC) and the India Meteorological Department (IMD) reported that a tropical depression has formed. On the next day, both agencies upgraded the system to a tropical storm, with the latter assigning it the name Nivar. Nivar made its landfall over north coastal Tamil Nadu between Puducherry and Chennai close to Marakkanam. Overall, Nivar caused $600 million in damages.[1]

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
▲ Extratropical cyclone / Remnant low / Tropical disturbance / Monsoon depression

On November 22, an area of low pressure was formed in the Bay of Bengal, off the coast of Tamil Nadu. It intensified into a depression on the early hours of November 23. In the early hours of November 24, it intensified into a cyclonic storm and it was named Nivar. Immediately, the Joint Typhoon Warning Centre gave a TCFA and designated unofficially as Tropical Cyclone 04B. IMD issued cyclone warnings off the coast of Tamil Nadu, Pondicherry and Sri Lanka. On 25th, the cyclone reached its peak intensity of 120 kmph which makes it as a Very Severe Cyclonic Storm. The JTWC designated it as a category 1 tropical cyclone of 130 kmph. It made a landfall in Marakkanam close to Pondicherry on the midnight of November 25. Then it gradually weakened into a Deep Depression on early hours of 26th and JTWC issued the final warning at the same time . Afterwards the system entered back into the Bay of Bengal as a Deep Depression and made second and final landfall at Andhra Pradesh coast on the same day. It weakened on the early hours of November 27 at Rayalaseema region.[2]

Preparations[]

Sri Lanka[]

Red warnings were put in place for northern Sri Lanka, with the threat of heavy rainfall in the region.[3]

India[]

On 24 November, six National Disaster Response Force (NDRF) teams have been posted to Cuddalore and two teams will be deployed in Chennai. Tamil Nadu government suspended bus services until further orders in seven districts of Thiruvarur, Nagapattinam, Pudukkottai, Thanjavur, Viluppuram, Chengalpattu and Cuddalore.[4] During a review meeting,Former Chief Minister of Tamil Nadu, K. Palaniswami asked his cabinet members and officials to remain completely vigilant and take necessary precautions ahead of the Cyclone. Officials were also directed to ensure that people in vulnerable areas were evacuated.[5] Measures were taken by the Tamil Nadu government to store dry rations and fuel for the people after the cyclone's impact.[6] The Tamil Nadu government declared a statewide holiday on 25 November.[7] The Tamil Nadu state government reported that more than 100,000 people were evacuated and were sheltered in 1000 relief centers.[8]

The District magistrate of the Nellore district of Andhra Pradesh reported that 3,363 people were sheltered in 115 relief camps.[9]

On November 26, the IMD issued yellow alert in several parts of Karnataka including Bengaluru.[10]

Impact[]

Sri Lanka[]

Showers and thunderstorms associated with Nivar impacted parts of Sri Lanka as the system moved inland on November 26.[11]

India[]

Tamil Nadu[]

The cyclone brought heavy to very heavy rains over north coastal Tamil Nadu starting 23 November 2020. Chennai received continuous downpours on 23,24,25 November 2020 with IMD Chennai recording 163mm ending 25 November 8:30 AM IST. Chennai and other parts of North TN saw gusty winds touching 60-70kmph on 24,25 November. Several roads were closed in the area of the Greater Chennai Corporation were closed due to waterlogging.[12] Due to intense rainfall, Chembarambakkam Lake released water for the first time after five years.[13] Many areas including Madipakkam, Velachery, Adambakkam and suburbs around Tambaram and low-lying regions along the river Adyar were flooded. Rainwater entering houses was also seen in some places in the western suburbs.[14] The Greater Chennai Corporation removed uprooted trees from 223 roads. The estimates of Chennai civic officials reported that flood water entered around 40,000 homes within the borders of the corporation.[15] Five people were reported dead in Tamil Nadu.

Puducherry[]

Trees were uprooted, electric poles were damaged and several areas were flooded as of November 26.[16] The Chief Minister of Puducherry V. Narayanasamy reported that the initial loss in agriculture and other sectors was estimated at ₹4 billion (US$54.2 million).[17]

Andhra Pradesh[]

Eight people were reported dead in Andhra Pradesh. The rainfalls made significant impact on the districts of Chittoor, Prakasam, Kadapa and Nellore, 112000 people were affected, 2,294 houses/huts were damaged, 6,133 homes were left stranded, 2,618 small animals, 88 large animals and 8,130 poultry birds were reported dead based on a preliminary evaluation.[18] In Nellore district, Paddy seedlings in 2500 hectares drowned and in Prakasam district, standing crops in 34,000 hectares were damaged.[19] Loss of APSPDCL was amounted to be ₹50.7 million (US$687,000).[20]

See also[]

References[]

  1. ^ "Global Catastrophe Recap in November 2020" (PDF). Aon. December 10, 2020. Retrieved December 10, 2020.{{cite web}}: CS1 maint: url-status (link)
  2. ^ "Update on Cyclone Gati and Depression BOB 04". mausam.imd.gov.in. 23 November 2020. Retrieved 2020-11-23.{{cite web}}: CS1 maint: url-status (link)
  3. ^ ECHO (November 24, 2020). "India, Sri Lanka – Tropical cyclone NIVAR (GDACS, JTWC, IMD, Department of Meteorology Sri Lanka) (ECHO Daily Flash of 24 November 2020)". reliefweb.int. ReliefWeb. Retrieved November 27, 2020.
  4. ^ "Cyclone Nivar live | TN deputes 10 top police officers to monitor rescue and relief works". The Hindu. 2020-11-24. ISSN 0971-751X. Retrieved 2020-11-24.
  5. ^ "Trains and buses cancelled, NDRF teams on alert: Here's how Tamil Nadu is bracing for Cyclone Nivar". Hindustan Times. 2020-11-24. Retrieved 2020-11-24.
  6. ^ Quint, The (2020-11-24). "Cyclone Nivar: PM Modi Assures Complete Support to TN, Puducherry". TheQuint. Retrieved 2020-11-24.
  7. ^ "Nivar: Possible flight disruption to statewide holiday in TN — 10 updates". mint. 2020-11-24. Retrieved 2020-11-24.
  8. ^ PTI (2020-11-25). "Over 1 lakh people evacuated in Tamil Nadu & Puducherry as cyclone Nivar intensifies". ThePrint. Retrieved 2020-11-25.
  9. ^ "1 Dead, Thousands Evacuated As Cyclone Nivar Brings Heavy Rain In Andhra". NDTV.com. Retrieved 2020-11-26.
  10. ^ "Cyclone Nivar: IMD issues yellow alert in Karnataka". Hindustan Times. 2020-11-26. Retrieved 2020-11-26.
  11. ^ "'Nivar' Cyclonic Storm gradually weakens". sundayobserver.lk. Sunday Observer. November 26, 2020. Retrieved November 27, 2020.
  12. ^ "Cyclone Nivar: Chennai Corporation evacuates 478 residents from low-lying areas". The Hindu. Chennai, India. November 25, 2020. Retrieved November 26, 2020.
  13. ^ Lakshmi, K. (2020-11-26). "Gates of Chembarambakkam reservoir opened after 5 years". The Hindu. ISSN 0971-751X. Retrieved 2020-11-26.
  14. ^ "Inundation plagues residents in and around city suburbs". The Hindu. Special Correspondent. 2020-11-26. ISSN 0971-751X. Retrieved 2020-11-26.{{cite news}}: CS1 maint: others (link)
  15. ^ "Cyclone Nivar: Chennai Corporation clears 223 roads of uprooted trees, restores traffic". The Hindu. Special Correspondent. 2020-11-26. ISSN 0971-751X. Retrieved 2020-11-26.{{cite news}}: CS1 maint: others (link)
  16. ^ "Cyclone Nivar impact: Heavy rains batter Pondicherry, trees uprooted". The Economic Times. Retrieved 2020-11-26.
  17. ^ "Tentative Loss Of Rs 400 Crore Due To Cyclone Nivar: Puducherry Chief Minister". NDTV.com. Retrieved 2020-11-26.
  18. ^ "Cyclone Nivar claims eight lives in Andhra Pradesh". Deccan Chronicle. 2020-11-29. Retrieved 2020-11-29.
  19. ^ "Cyclone Nivar | Three killed, crops damaged as storm crosses Tamil Nadu coast". The Hindu. Special Correspondent. 2020-11-26. ISSN 0971-751X. Retrieved 2020-12-01.{{cite news}}: CS1 maint: others (link)
  20. ^ Raghavendra, V (November 30, 2020). "Nivar causes a loss of ₹5.07 crore to SPDCL". The Hindu. Retrieved November 30, 2020.

External links[]

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