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| Tue, 9th Feb 2021 13:29:00 |
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Cooling La Niña is on the wane, but temperatures set to rise: UN weather agency |
It noted that above-normal temperatures in the next three months are expected in western, central and eastern Asia and over the southern half of North America, and that there is a moderate likelihood (65 per cent) that the La Niña event will continue into April.
Above-normal temperatures are also likely over most northern high latitudes - except northwestern North America - southern, central and eastern parts of South America, and equatorial and northern Africa.
Below-normal temperatures are more likely for northern South America.
‘Unusually wet’
Turning to rainfall, WMO said that there were “increased chances of unusually wet conditions” that were consistent with La Niña’s effects on regional climates, over much of South East Asia, Australia and northern South America and islands in Melanesia.
Southern Africa may also see above-normal rainfall, the agency continued, along with “an increased probability of above-normal precipitation (possibly as snow) over much of the Northern Hemisphere north of about 45 degrees North”, although WMO credited the “ongoing negative Arctic Oscillation” climate driver for this trend, which has been observed since December, rather than La Niña.Drier-than-normal conditions are however likely over much of western and central Asia “and along about 30 degrees North in
East Asia, as well as parts of the Greater Horn of Africa, parts of Central Africa, sub-tropical latitudes of North America, islands in Polynesia and some parts of southeastern South America” says WMO’s Global Seasonal Climate Update (GSCU).
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