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Atlantic hurricane season ends, impacts continue

INGO-GECPO | 기사입력 2022/12/02 [10:45]

Atlantic hurricane season ends, impacts continue

INGO-GECPO | 입력 : 2022/12/02 [10:45]

 

                       Bali tropical cyclone workshop on improved science and services 

 

The 2022 Atlantic hurricane season officially ends on November 30, but the impact of the most devastating storms will continue for many months to come. Progress in forecasting and accurate early warnings has prevented much loss of life, but more remains to be done – and this will be the focus of an international workshop, held once every four years. 

 

In total, this hurricane season produced 14 named storms, with winds of 63 kmh (39 mph) or greater, of which eight became hurricanes, with winds of 119 kmh (74 mph) or greater. Two intensified to major hurricanes – Fiona and Ian - with winds of more than 178 kmh (111 mph), according to the end-of-season tally from the US National Oceanic and Atmospheric Administration (NOAA).  

 

An average hurricane season has 14 named storms, seven hurricanes and three major hurricanes. The 2022 season was quieter than 2020 and 2021, which were both so active that the regular list of rotating names was exhausted. But it takes just one landfalling storm to wreck communities and economies.  

 

In addition to the loss and damage witnessed in the Atlantic and Caribbean, powerful tropical hit Asia (including China, Japan, the Philippines and Viet Nam) in 2022. A succession of tropical cyclones rolled back sustainable development in the Indian Ocean Island of Madagascar.   

 

Tropical Cyclones  – also known as hurricanes and typhoons - are one of the biggest threats to life and property, with deadly hazards including storm surge, flooding, extreme winds, tornadoes and lightning. Between 1970 and 2019, more than 1 900 disasters have been attributed to tropical cyclones, which killed nearly 780 000 people and caused US$ 1 407.6 billion in economic losses, according to the WMO Atlas of Mortality and Economic Losses from Weather, Climate and Water Extremes.  

 

Climate change is expected to lead to an increase in the proportion of major tropical cyclones and to increase the heavy rainfall associated with these events, whilst sea level rise and coastal development is worsening the impact of coastal flooding. 

 

International Workshop on Tropical Cyclones  

In order to advance knowledge and collaboration, the tenth session of the International Workshop on Tropical Cyclones will take place in Bali from 5 to 9 December 2022, hosted by Indonesia’s national meteorological service BMKG 

 

It is sponsored by WMO’s Tropical Cyclone Programme and World Weather Research Programme and is held every four years to bring together operational forecasters and the research communities.  

 

More than 120 experts are expected to be present at the workshop. Its theme  “Improved tropical cyclone science and services for better-decision making” reflects the need to optimize decisions and community action at every point along the end-to-end warning chain. 

 

The main objectives of the workshop are: 

  • to report on current knowledge, forecasting and research trends on tropical cyclones from an integrated global perspective; 

  • to foster communication within and between operational and research communities; 

  • to identify needs and opportunities in tropical cyclone operational and research and offer recommendations for actions that will improve global knowledge of and response. 

 

2022 Atlantic Season

2022 hurricane season ends after devastation caused by Fiona, IanHurricane Fiona caused devastation from the Caribbean to Canada. It hit the American island of Puerto Rico on 18 September, bringing torrential rains and causing considerable damage including power outages as well as some casualties. After tracking over the Dominican Republic, Fiona strengthened to a Category 4 hurricane on the Saffir-Simpson scale, with maximum sustained winds of near 130 mph (215 km/h) as it headed toward the Caribbean island of Bermuda. It then transitioned over the Atlantic and made landfall in Nova Scotia, Canada, on 24 September as the strongest tropical storm ever to hit Canada. 

 

Hurricane Ian hit western Cuba on 27 September and then strengthened and increased greatly in size over the warm waters of the Gulf of Mexico as it moved towards Florida. It made landfall on 28 September with sustained winds of 150 miles per hour (240 kmh) in a densely populated, low-lying residential area. It was classed as a strong Category 4 , with catastrophic storm surge, flooding and wind and was described as one of the worst hurricanes to hit the area in a century.  It made landfall a second time as a category 1 storm in South Carolina as a category 1 storm.  

 

There was a rare mid-season pause in storms that scientists preliminarily believe was caused by increased wind shear and suppressed atmospheric moisture high over the Atlantic Ocean. After a quiet period in August, activity ramped up in September with seven named storms, including two major hurricanes — Fiona and Ian. The season also included a rare late-season storm with Hurricane Nicole making landfall on November 10 along the east coast of Florida. 

 

WMO’s Hurricane Committee (Regional Association IV) will meet in March 2023 to discuss lessons learned to save lives and protect property and infrastructure. It will also decide on the retirement of names. 

 

WMO maintains rotating lists of names in alphabetical order to alert the public of potential hazards. In this region, male and female names are alternated, and the lists are used every six years. If the list of names is exhausted, a supplemental list can be used. If a hurricane is particularly devastating or deadly, its name is retired and a new one selected. 

 

Published 1 December 2022

Source: WMO

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