DOUBLE-DIP’ LA NIÑA = BRUTAL NORTHERN HEMISPHERE WINTER,

[Mark]

La Niña has returned to the Pacific Ocean, and threatens a brutally cold and snowy northern hemisphere winter. This event is referred to a ‘double-dip’ La Niña because similar conditions formed last year, too.

It has an 87 percent chance of lingering until February 2022, said NOAA in a statement.

Very briefly, La Niña is characterized by unusually cold ocean temperatures in the Equatorial Pacific (region 3.4). The climate pattern tends to generate colder, snowier winters across much of North America, Europe and Asia, and a wetter, stormier summer in Australia.

Concentrating on the United States, the northwest is set to suffer an anomalously cold winter with high snowfall totals to boot.

Bob Larson, expert senior meteorologist for Accuweather, said: “The snowfall forecast for New York City is, on average, 29.8 inches, but our prediction is up to 32 inches” — in my mind, these are conservative estimates.

Last winter’s La Niña unleashed record-cold temperatures in February, 2021 – the coldest in record history for many locales. During that month, the average temperature for the contiguous U.S. was just 30.6F–3.2F below the multidecadal average, while unprecedented snow totals battered many states.
https://electroverse.net/double-dip-la-nina-brutal-winter-record-hail-pounds-australia/

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[Mark]

Why you can expect the La Niña wet weather event to hang around for a little longer

The weather event, confirmed to have formed over the Pacific Ocean by the BoM on November 23, is responsible for Australia's wet summer of soaking rains.
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Trade winds remain stronger than average in the western Pacific, delaying further weakening of the #LaNiña over the past fortnight.

Latest outlooks indicate a return to neutral #ENSO levels late in the southern hemisphere #autumn.

Learn more: https://t.co/mmoBP9NyDE pic.twitter.com/85SliZRQ5T

— Bureau of Meteorology, Australia (@BOM_au) March 15, 2022
"Trade winds remain stronger than average in the western Pacific, delaying further weakening of the #LaNiña over the past fortnight," BoM said.
"Latest outlooks indicate a return to neutral #ENSO levels late in the southern hemisphere #autumn."
Weatherzone said this is the first time in a decade that Australia had back-to-back La Niña events.
The weather service said the delay in the easing of La Niña increases "the likelihood of above-average rain in northern and eastern Australia during the next few months".
https://www.9news.com.au/national/weather-update-stronger-than-average-trade-winds-further-delay-end-of-la-nina/ccbb6998-88d4-48f9-a504-bd37254456b4

[Mark]

New data released overnight by the U.S. Climate Prediction Centre has increased the likelihood of a third consecutive La Niña later this year.


According to the Bureau of Meteorology, the Pacific Ocean has just come out of two back-to-back La Niña episodes, which ran from September 2020 to March 2021 and November 2021 to June 2022. This was the first double-dip La Niña event in a decade.


But while the Pacific Ocean has now returned to a neutral state, it is still in a La Niña-like pattern and forecasts suggest that it may restrengthen later this year.





Image: Sea surface temperature anomalies in the Pacific Ocean on July 13, 2022.


Data released overnight by the US Climate Prediction Centre (CPC) and Columbia University’s International Research Institute for Climate and Society (IRI) shows that the probability of La Niña increases later this year. Their predictions give La Niña a 62 percent chance of occurring by early spring and a 65 to 66 percent chance in late spring and early summer.

https://www.weatherzone.com.au/news/odds-increasing-for-la-ninas-return/690941