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WMO reports decrease in likelihood of severe Atlantic hurricane season ahead  |

6th August 2022
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WMO reports decrease in likelihood of severe Atlantic hurricane season ahead  |
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The conditions do still point towards an “above-normal” 2022 Atlantic hurricane season, according to NOAA’s annual mid-season update issued by the Climate Prediction Center, a division of the United States’ National Weather Service. 

NOAA forecasters have decreased the likelihood of an above-normal season – which could herald more devastating storms for the Caribbean and east coast of the US – from 65 per cent in May, to 60 per cent in most recent estimates. However, the likelihood of “near-normal” activity has risen to 30 per cent, from a previous estimate of just 10 per cent.  

However, The Intergovernmental Panel on Climate Change’s Sixth Assessment report projects that the global proportion of tropical cyclones that reach very intense levels of category 4 or 5, along with their peak winds and rainfall rates, are expected to gradually increase due to global warming caused by rising CO2 emissions.  

Hurricane names pending 

NOAA’s update to the prior forecast – which covers the entire six-month hurricane season ahead – project that there will be 14-20 named storms with winds of 39 mph/63 kmh or greater. 

Of these, six-10, could become hurricanes with winds of 74 mph/119 kmh or greater. Of these, three to five could become major hurricanes with winds of 111 mph/179 kmh or greater. NOAA has projected these ranges with a 70 per cent level of confidence.  

Thus far, the season has seen three named storms, but no hurricanes in the Atlantic Basin. On average, hurricane season produces 14 named storms, seven of which become hurricanes, including three major hurricanes. 

 In the North Atlantic, and northeastern Pacific basins, WMO’s Regional Specialized Meteorological Center Miami (the US National Hurricane Center) is responsible for tropical cyclone forecasting, including marine-related hazards. 


Much of the area around the city of Gonaives was in floodwaters and covered by mud after Tropical Storm Jeanne tore through Haiti. (file)

UN Photo/Sophia Paris

Much of the area around the city of Gonaives was in floodwaters and covered by mud after Tropical Storm Jeanne tore through Haiti. (file)

Eye of the storm 

There are several conditions that point toward an active hurricane season. Most notably are the La Niña conditions, which will likely remain for the rest of 2022. La Niña conditions, the periodic cooling of the ocean surface central and east of the Pacific equator, will slightly enhance hurricane activity, said the press release issued by the World Meteorological Organization. 

In addition to a continued La Niña, weaker tropical Atlantic winds, an active west African Monsoon and likely above-normal Atlantic sea-surface temperatures, set the stage for higher-than-average hurricane activity.  

The hurricane seasons in 2020 and 2021 were exceptionally active and both years exhausted the prepared lists of storm names, from the WMO’s rotating list. The WMO maintains lists of names, in order to aid clear communication over hazards ahead, and help save lives. 

Every year, there are on average 84 named tropical cyclones all over the world. 

43 deaths per day  

Over the past 50 years, every single day, they have caused on average 43 deaths and $78 million in damages, according to WMO statistics from 1970-2019.  

However, based on the data, death tolls have fallen dramatically. This development is thanks to improvements in forecasting, warning and disaster risk reduction, coordinated by WMO’s Tropical Cyclone Programme. 

In view of the growing hazards, WMO is working to ensure there is universal access to early warnings and is seeking to strengthen impact-based forecasting.  

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