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Cyclonic Storm Roanu is a weakening tropical cyclone in the Bay of Bengal currently affecting the eastern coast of India. It is the first tropical cyclone ...
Cyclone Roanu
From Wikipedia, the free encyclopedia
Cyclonic Storm Roanu is a weakening
tropical cyclone in the
Bay of Bengal currently affecting the eastern coast of India. It is the first tropical cyclone of the
annual cyclone season. Roanu originated from a
low pressure area that formed south of
Sri Lanka. It gradually drifted north and intensified into a cyclonic storm on 19 May. However,
wind shear and land interaction caused it to weaken slightly, before reintensifying as it accelerated towards the coast of Bangladesh.
So far, Roanu is responsible for at least 71 deaths in
Sri Lanka and another 19 deaths in
Bangladesh. Roanu also brought torrential rainfall to the Indian states of
Tamil Nadu,
Andhra Pradesh and
Odisha as it drifted in a generally northeastward direction, close to the coast. It is forecast to make
landfall on the coast of
Bangladesh in the next 24 hours, while maintaining cyclonic storm intensity.
Meteorological history
Under the influence of a
trough, a
low pressure area formed over the Bay of Bengal on 14 May.
[1][2] It slowly consolidated, prompting the
India Meteorological Department (IMD) to classify it as a depression on 17 May.
[3] By the late hours of 17 May, a
tropical cyclone formation alert (TCFA) was issued, following which the system was upgraded to tropical storm intensity by the
Joint Typhoon Warning Center (JTWC).
[4][5] The next day, the IMD upgraded the storm to a Deep Depression, prompting the issuance of cyclone warnings for the states of
Andhra Pradesh and
Odisha.
[6] On 19 May, the IMD reported that the storm had reached cyclonic storm intensity, naming it
Roanu.
[7] Roanu was tracking along the northern periphery of a
subtropical ridge located over the
Malay Peninsula. Despite the favorable outflow and warm
sea surface temperatures (SSTs) of up to 31 °C (88 °F), its proximity to land and moderate vertical
wind shear (VWS) kept the storm from
intensifying rapidly.
[8] The
diurnal temperature variation over land and the persistent wind shear began to affect the deep
convection of the
low-level circulation center (LLCC).
SSMIS imagery later revealed tightly curved
rainbands wrapped into the LLCC.
[9] Located approximately 150 kilometres (93 mi) from
Visakhapatnam,
in the late hours of that day, Roanu showed a weakening trend after
most of the convection covering the LLCC was sheared off. However, VWS
soon decreased,
[10] and the storm reestablished deep convection over and around the LLCC, forming a
central dense overcast in a period of 6 hours. As a result, Roanu re-intensified slightly as it accelerated towards the coast of Bangladesh.
[11]
Current storm information
As of 11:30
IST (06:00
UTC), 21 May 2016, Cyclonic Storm Roanu was located near
latitude 21.9°N and
longitude 91.0°E, about 60 km (35 mi) south of
Hatia,
Bangladesh, and about 100 km (60 mi) west-southwest of
Chittagong,
Bangladesh.
Maximum 3-minute sustained wind speeds are about 85 km/h (55 mph),
gusting to 100 km/h (60 mph). Minimum central pressure is estimated at
990 hPa (29.23 inHg). The storm is moving east-northeastwards at 38 km/h
(24 mph).
Dvorak intensity
of the storm is estimated at T3.0. Roanu is expected to make landfall
as a Cyclonic Storm on the south Bangladesh coast close to Chittagong by
the evening of 21 May.
Preparations and impact
Sri Lanka
The low pressure area that preceded Cyclone Roanu on 15 May. Sri Lanka is completely covered beneath the thick mass of clouds.
Preparations for the storm began even before the IMD started tracking
it as a depression. As the area of low pressure tracked closer to the
country, the Meteorology Department of Sri Lanka issued a warning on 13
May stating that the disturbance would affect the country. Fishermen
were advised to be vigilant.
[12] Later, The National Building Research Organisation (NBRO) issued landslide warning in the districts of
Badulla,
Monaragala,
Kandy,
Ratnapura,
Kurunegala,
Nuwara Eliya,
Kegalle and
Matale.
[13] President
Maithripala Sirisena
instructed the local authorities to provide relief to those affected by
the system. The Minister Of Disaster Management, Defense Secretary,
Tri Forces' Commanders and the Inspector General Of Police were instructed to undertake the operation.
[14]
Sri Lankan Disaster Management Centre (DMC) issued a flood alert on
16 May as the low pressure area brought heavy rains to the country. The
Kelani River and
Maha Oya swelled as a result of the rainfall.
[15] The depression brought torrential rains to
Sri Lanka, causing flash flooding and landslides, resulting in 37 deaths. Additionally, the storm displaced over 134,000 people.
[16] By 21 May, the death toll rose to 71, while at least 127 other people had been reported missing.
[17]
The Sri Lankan Disaster Management Centre said that areas of the nation
received the highest amount of rainfall since 2010. Landslides buried
three villages in the
Kegalle District.
[18]
India
Parts of
Chennai and
Tamil Nadu received between 93 mm (3.7 in) and 116 mm (4.6 in) of rain in a period of 24 hours.
[19] Later reports indicated that the city had received the highest rainfall in over 2 decades.
[20]
12,000 personnel were deployed in the city to aide rescue operations.
Multiple boats were stationed around the city for emergency. In the
low-lying areas, the
National Disaster Response Force positioned 4 teams of personnel. An emergency number (1070) was set up.
[21]
The IMD put the states of Andhra Pradesh and Odisha on an orange alert
(the second highest level of emergency in India) on 19 May. The city of
Kakinada recorded 174 mm (6.9 in) of rain in a day, the highest reported in the past 10 years.
Bapatla reported 134 mm (5.3 in) of rain.
Visakhapatnam District,
Vizianagaram District and
Srikakulam District were also affected by rains and were forecast to receive up to 210 mm (8.3 in) by 21 May.
[22] Chief Minister of Andhra Pradesh N. Chandrababu Naidu positioned 5 teams, each consisting of 100 personnel, in
Krishna,
East Godavari and Visakhapatnam districts.
[23]
Under the influence of the system, various places in Odisha received
moderate to heavy rainfall. The reported rainfall was 96 mm (3.8 in) in
Paradip, 85 mm (3.3 in) in
Puri, 63 mm (2.5 in) in
Chandbali, 52 mm (2.0 in) in
Balasore, 31 mm (1.2 in) in
Cuttack, and 29 mm (1.1 in) in
Bhubaneshwar.
Chief Minister of Odisha Naveen Patnaik readied 10 teams of Odisha Disaster Rapid Action Force and fire service personnel.
Government of Odisha
issued an alert in at least 12 districts in coastal, southern and
northern regions of the state. The maximum temperature in Bhubaneshwar
on 20 May was 26.2 °C (79.2 °F)
[24] against the average of 37.2 °C (99.0 °F) for the month of May.
[25] In
West Bengal,
Digha received 73 mm (2.9 in) of rainfall and
Sagar Island received 96 mm (3.8 in) as the cyclone inched closer.
[26]
Bangladesh
An animation depicting Roanu nearing landfall over Bangladesh.
In the wake of the storm's anticipated landfall near
Chittagong, officials relocated more than 2 million people from the low lying coastal districts of the state. A
storm surge 4–5 ft (1.2–1.5 m) above the
astronomical tide was expected near the coast.
[27]
So far Roanu has killed at least 203 people in four districts across
the country. Many people died when the cyclone's storm surge overtopped
dams. At least forty people are also missing.
[28]
Aftermath
Rescue operations began soon after the storm, on 18 May, when
Sri Lankan military
personnel searched for missing people in a rural areas. 115 soldiers
reportedly searched the villages buried by the landslides in attempt to
find any survivors.
[29] At least 50 people were rescued from the hardest-hit areas in the Kegalle District.
[30]
However, another spell of heavy rain on 19 May disrupted the
operations. Mud in some villages was reportedly as high as 75 ft (23 m).
[31]
Major General Sudantha Ranasinghe, the officer in charge of the rescue
operation, later told that the authorities had begun to give up the
rescue operations. The death toll was confirmed to be 58.
[32] By the evening of 19 May, rescuers feared that the remaining 134 people missing were dead.
[30] On 20 May, the
Indian Navy Southern Naval Command sent its ships
INS Sunayna and
INS Sutlej carrying relief material to the capital city,
Colombo.
[33] Australian
Minister for Foreign Affairs Julie Bishop
pledged assistance to Sri Lanka, saying "The Australian Government
stands ready to provide any assistance that our Sri Lankan friends may
require in responding to this disaster."
[34][35]
As the search operations resumed that day, rescuers continued
recovering bodies of those buried in the landslides which also
reportedly destroyed 66 houses in Elangapitiya.
[36]
200,000 people had to escape from the low-lying areas of Colombo on
rubber dinghies and makeshift rafts. A total of 71 deaths and 127
missing persons had been reported. The
Sri Lanka national cricket team donated
Rs.9,000,000 (
US$68,931) to the victims of Roanu.
[37]
See also
References
"Tropical Weather Outlook". India Meteorological Department. Retrieved 14 May 2016.
External links
- 01B.ROANU from the U.S. Naval Research Laboratory
"All India Weather Summary and Forecast Bulletin, Night of 14 May 2016.". India Meteorological Department. Retrieved 14 May 2016.
Yadav, B. P. "Special Tropical Outlook for the North Indian Ocean issued at 0600 UTC of 17 May 2016.". India Meteorological Department. Retrieved 17 May 2016.
"Current Significant Tropical Weather Advisories ABIO10 (Indian Ocean) reissued at 18 May 2016, 0030 UTC". Joint Typhoon Warning Center. Retrieved 18 May 2016.
"Tropical Cyclone 01B (One) Warning #01 Issued on 18 May 2016 at 0900 UTC.". Joint Typhoon Warning Center. Retrieved 18 May 2016.
B.P. Yadav (18 May 2016). "Deep Depression BOB 01 Warning Bulletin 5 issued on 18 May 2016.". India Meteorological Department. p. 1. Retrieved 18 May 2016.
Kotal, S. D. "Cyclonic Storm Roanu, Bulletin No. 9 issued at 0300 UTC, 19 May 2016.". India Meteorological Department. Retrieved 19 May 2016.
"Tropical Cyclone 01B (Roanu) Warning #04". Joint Typhoon Warning Centre. Retrieved 19 May 2016.
"Tropical Cyclone 01B (Roanu) Warning #06". Joint Typhoon Warning Center. Retrieved 19 May 2016.
"Tropical Cyclone 01B (Roanu) Warning #07". Joint Typhoon Warning Centre. Retrieved 19 May 2016.
"Tropical Cyclone 01B (Roanu) Warning #08". Joint Typhoon Warning Center. Retrieved 20 May 2016.
"Met Dept issues bad weather warning". The Official Government News Portal of Sri Lanka. Retrieved 19 May 2016.
"Landslide warning as heavy rains lash island". The Associated Newspapers of Ceylon Ltd. Retrieved 19 May 2016.
"Sri Lankan President Calls For Heavy Rains". Cihan News Agency. Retrieved 19 May 2016.
"Sri Lanka on alert for floods, landslides". The Times of India. Retrieved 19 May 2016.
"12 die in Sri Lanka flash floods, several missing". Bennett, Coleman & Co. Ltd. (The Times of India). Retrieved 17 May 2016.
"71 killed, 127 missing as foreign aid reaches flood-hit Sri Lanka". Business Standard. Press Trust of India. Retrieved 21 May 2016.
Perera, Amantha. "200 families missing as Sri Lankan landslides bury three villages". The Guardian. Retrieved 18 May 2016.
Karthikeyan, Hemalatha (18 May 2016). "Depression moving away, but Chennai will continue to get rain on Wednesday". The Times of India. Retrieved 18 May 2016.
Shekhar, Laasya. "Chennai records 11.7cm of rainfall breaking a two-decade-old record.". Deccan Chronicle. Retrieved 19 May 2016.
"Chennai rains: Authorities keep boats on standby after heavy rain". News Nation. Retrieved 19 May 2016.
Srinivasa Rao Apparasu; Priya Ranjan Sahu; Hindustan Times. "Andhra, Odisha on high alert as cyclone Roanu set to hit coast". The Hindu. Retrieved 19 May 2016.
"Cyclone Roanu drops anchor off A.P.". The Hindu. Retrieved 20 May 2016.
"Cyclone ‘Roanu’ 50 km off Odisha coast; rains, winds disrupt life". The Tribune Trust. Retrieved 20 May 2016.
"Bhubaneshwar Climate Normals 1971–1990". National Oceanic and Atmospheric Administration. Retrieved 24 December 2012.
"West Bengal begins facing wrath of Cyclone Roanu". Skymet Weather Services Pvt. Ltd. Retrieved 20 May 2016.
Reuters. "Cyclone Roanu: Bangladesh moves 2 million people from coast". The Guardian. The Guardian. Retrieved 21 May 2016.
"Cyclone Roanu claims 21 lives in seven Bangladesh districts". bd24news.com.
"Sri Lankan Soldiers Search for Survivors in Landslide-Devastated Village". Latin American Herald Tribune. Retrieved 19 May 2016.
"Sri Lanka mudslide: Army fears 134 missing are dead". BBC. 19 May 2016. Retrieved 19 May 2016.
Sirilal, Ranga. "Hopes fade for 150 feared buried in Sri Lanka landslides". Euronews. Retrieved 19 May 2016.
Aneez, Shihar. "Hopes fade for over 130 feared buried in Sri Lanka landslides". Reuters. Retrieved 19 May 2016.
"Cyclone ROANU: Indian naval ships rush to Sri Lanka with relief materials". The Indian Express. Retrieved 20 May 2016.
"Australia offers assistance to Sri Lanka following the natural disaster". Colombo Page. Retrieved 20 May 2016.
"Australia ready to help Sri Lanka following damaging landslides, floods: Aust'n FM". The Associated Newspapers of Ceylon Ltd.,. Retrieved 20 May 2016.
The Associated Press. "Search resumes in rain for missing in Sri Lankan landslide". Japan News. Retrieved 20 May 2016.
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