Extremely severe cyclone Aamphan hit the West Bengal coast in Kolkata. This cyclone has been wind speed or around 240 km/ph.
In meteorology, a cyclone is a large scale air mass that rotates around a strong centre of low atmospheric pressure. Cyclones are characterized by inward spiralling winds that rotate about a zone of low pressure.
A tropical cyclone is a rapidly rotating storm system characterized by a low-pressure centre, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain or squalls.
Super Cyclonic Storm Amphan was a powerful and deadly tropical cyclone that caused widespread damage in East India and Bangladesh in May 2020. It was the strongest tropical cyclone to strike the Ganges Delta since Sidr of the 2007 season and the first super cyclonic storm to occur in the Bay of Bengal since the 1999 Odisha cyclone. Causing over US$13 billion of damage, Amphan is also the costliest cyclone ever recorded in the North Indian Ocean, surpassing the record held by Cyclone Nargis of 2008.
Coastal areas in Odisha—as well as Kolkata, Hooghly, Howrah, East Midnapur, North 24 Parganas, and South 24 Parganas in West Bengal—were affected by the cyclone. It also caused significant destruction in Bangladesh.
Origin of the Aamphan
The first tropical cyclone of the 2020 North Indian Ocean cyclone season, Amphan originated from a low-pressure area persisting a couple of hundred miles (300 km) east of Colombo, Sri Lanka, on 13 May 2020. Tracking northeastward, the disturbance organized over exceptionally warm sea surface temperatures; the Joint Typhoon Warning Center (JTWC) upgraded the system to a tropical depression on 15 May while the Indian Meteorological Department (IMD) followed suit the following day. On 17 May, Amphan underwent rapid intensification and became an extremely severe cyclonic storm within 12 hours.
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Low-Pressure Area Amphan
On 18 May, at approximately 12:00 UTC, Amphan reached its peak intensity with 3-minute sustained wind speeds of 240 km/h (150 mph), 1-minute sustained wind speeds of 260 km/h (160 mph) and a minimum central barometric pressure of 925 mbar (27.32 inHg).
Direction Of Amphan
During 13 May 2020, an area of low pressure developed over the Southeastern Bay of Bengal about 1020 km (635 mi) to the southeast of Visakhapatnam in the Indian state of Andhra Pradesh. The area of low pressure was located within a favourable environment for further development with good equator-ward outflow, warm sea surface temperatures, and low vertical wind shear. it was located about 1,100 km (685 mi) to the south of Paradip in the Indian state of Odisha.
Moving northwards, the depression continually organised and became a cyclonic storm a few hours later, receiving the name Amphan. Amphan underwent rapid intensification into a severe cyclonic storm, with the JTWC assessing an increase in winds from 140 km/h (85 mph) at 12:00 UTC to 215 km/h (130 mph), the equivalent to a Category 4 hurricane.
Around 5:30 p.m. IST (12:00 UTC), Amphan made landfall near Bakkhali, West Bengal with winds of 155 km/h (100 mph).
10 Important Unknown Facts & Updates about Extremely severe cyclone Aamphan
- Wind Speed of Amphan when it made the landfall – 155-165 km/h
- Wind Speed in Kolkata when it made landfall around 2.30 hours on May 20– 80-90 km/h
- The most dangerous thing in a cyclone is a tidal wave. 4-6 metre high astronomical tidal wave expected in shallow areas of South & North 24 Parganas. A 3-4-metre high tidal wave in East Midnapore between afternoon and night.
- The India Meteorological Department’s weather monitoring station at Alipur in Kolkata recorded exceptionally high rainfall of 236 mm over the last 24 hours from Wednesday morning to Thursday morning. Similarly, the Dum Dum area in the city of joy also received 200 mm rainfall, while Salt Lake area witnessed 183 mm on Wednesday.
- PM Modi announced a 1000 crore INR interim relief fund for Amphan hit West Bengal.
- Families who lost their loved ones in the cyclone will get 2 lakh INR while the ones injured will get 50,000/- INR.
- Amphan has now weakened over North Bangladesh and is very likely to fall into a low-pressure area.
- Doppler Weather Radar (DWR) at Visakhapatnam (Andhra Pradesh) is used to track the Amphan.
- After the Phailin cyclone that had hit the Bengal-Odisha coast in 2013, Amphan is said to be the strongest tropical cyclone to hit the coast.
- National Disaster Response Force (NDRF) is a specialized authority constituted under the Disaster Management Act 2005. It is monitoring Amphan with the parallel monitoring by National Crisis Monitoring Committee (Constituted by the Government of India, to meet the exigencies of natural calamities.), Cabinet Committee on Security (CCS) & Indian Meteorological Committee (IMD).
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