Australia’s Bureau of Meteorology (BOM) has officially declared a La Nina weather pattern has established in the Pacific Ocean, and expects the phenomenon to persist until at least January of 2021, according to an update published Tuesday. More rain and greater risk of floods. And places like the southwestern United States can be very dry. For Western Australia, the biggest impacts of the La Niña weather pattern have been felt in the water. La Nina is an abnormal pattern of wind and sea surface temperatures in the equatorial Paficic Ocean that causes more moisture-laden air to flow towards Australia. Series/Documentary 1 of 4 (1999)-La Nina-La Nina is a climate phenomenon, the sister of El Nino. La Niña (/ l ɑː ˈ n iː n j ə /, Spanish pronunciation: ) is a coupled ocean-atmosphere phenomenon that is the colder counterpart of El Niño, as part of the broader El Niño–Southern Oscillation (ENSO) climate pattern.The name La Niña originates from Spanish, meaning "the little girl", by analogy to El Niño meaning "the little boy". "Another effect of La Niña around Australia is marine heatwaves. Overall, there is a sense that the impact of La Niña Modoki comes from northwest. More than 10,000 people were forced to evacuate, and damage from the disaster was estimated at more than $2 billion. Aussies are being warned to get ready for a wet and wild summer with La Nina … A La Niña occurs when stronger equatorial winds, blowing east to west, cool the Pacific Ocean in the tropical north of Australia. This means that places like Indonesia and Australia can get much more rain than usual. It coincided with the last significant La Niña in 2010–12. The last La Niña event, which occurred from 2010-2012, resulted in one of Australia's wettest two-year periods on record and widespread flooding occurred in many parts of the country. Conversely, during La Niña, there is a sustained strengthening of the trade winds. The Madden–Julian Oscillation (MJO) has moved into the Australian region at moderate strength and is expected to bring increased cloudiness and rainfall to far northern Australia and the broader Maritime Continent over the next week or two. The severe multi-year drought across the eastern states is being subdued in 2020 as rain begins to replenish the dry land and empty dams. This results in more moisture in our air and increases the chances of cooler temperatures, clouds and rain, flooding and cyclones. However, he went a step further and said the wild weather hitting Australia’s east coast was more extreme than a typical La Niña event. Watkins said La Niña would likely bring increased rainfall in both northern and eastern Australia and increased risk of flooding. La Niña can cause changes to much more than just tropical cyclone numbers. When it rains it pours: Australia is facing a wetter than usual autumn as La Niña weather system hangs around after a soaked summer - and it's bad news for the eastern states The last La Niña event stretched from 2010 to 2012 and resulted in one of Australia's wettest two-year periods, but conditions this year are forecast to be less extreme. Warm ocean water and clouds move west during a La Niña. La Niña is a phase of the El Niño Southern Oscillation (ENSO), which describes ocean and atmospheric circulations over the Pacific Ocean. The heating occurs during La Nina years when warmer water from the Pacific travels between northern Australia and the Indonesian archipelago and … The impact of La Niña Modoki extends from northwest Australia to the Murray‐Darling Basin region, whereas the influence of La Niña concentrates on northeastern Australia and much of South Australia. However, strong La Niña events are associated with catastrophic floods in northern Australia. Australia’s epic floods shouldn’t have been this big, given the La Nina is relatively weak. La Niña, the soggy sister of the arid El Niño weather pattern that devastated parts of Southeast Asia, has vast regions of Papua New Guinea and eastern Australia bracing for heavy rain and floods. La Niña, part of the El Niño-Southern Oscillation, increases the temperature of the waters near Australia and cools waters off South America. La Nina, the climate driver that typically brings enhanced rainfall to Australia, has been in the spotlight lately as it edges closer to reaching its threshold this spring. La Niña is a weather pattern that begins in the Pacific Ocean. Australia could face more bushfires over summer as the country's first La Niña in almost 10 years is declared active.. If you missed it last year, Australia is currently experiencing La Niña. During a La Nina phase, Australia’s northern waters are warm with increased convection. The biggest impact is to rainfall, with large parts of northern and eastern Australia typically having much more rain … Tom Saunders said: “Australia’s severe weather season (SWS) will see a wet La Niña-induced summer for the first time in nine years, increasing the risk of cyclones, flooding and thunderstorms. Global La Niña Impacts Globally, La Niña is characterized by wetter than normal conditions west of the equatorial central Pacific over northern Australia and Indonesia during the northern hemisphere winter, and over the Philippines during the northern hemisphere summer. This brings more … La Nina is the weather pattern that delivered Cyclone Yasi to Queensland in 2011, one of the strongest to ever hit Australia bringing peak wind gusts estimated at 285 kilometres per hour. La Niña typically enhances cloud cover and rainfall over large areas of Australia in summer, which promotes cooler days and … La Niña: 2008–09 SOI: Weak to Moderate SST: Weak This weak La Niña was a very short, marginal event, with its greatest impact occurring across the north of Australia during the period August 2008 to April 2009 (Figure 1).. El Niño and La Niña Years and Intensities Based on Oceanic Ni ño Index (ONI) Jan Null, CCM Updated thru Dec-Jan-Feb 2020-21 : The Oceanic Ni ñ o Index (ONI) has become the de-facto standard that NOAA uses for identifying El Ni ñ o (warm) and La Ni ña (cool) events in the tropical Pacific. Go direct to the source Download the ABC News app for all the latest. Despite Australia sweltering through its hottest November on record, this summer is still shaping up to be wetter, and potentially cooler, than recent years due to the La Nina climate event. But a worrying factor may have tipped the scales. Australia weather: La Nina brings more risk of cyclones and summer floods. La Niña is a periodic weather pattern that happens roughly every three to five years, and it’s when winds change the movement of the ocean and draw cooler deep water up from below. The last time Australia experienced a La Niña event was between 2010 and 2012, resulting in one of our wettest two-year periods on record, according to the BOM. Australia could be in for the most rain it has seen in almost a decade according to a crucial climate driver, the Bureau of Meteorology says.. The 2010 La Niña event correlates with one of the worst floods in the history of Queensland, Australia. Dr. Gallant describes it as kind of like a seesaw effect where on one side of the world the waters are really warm, while on the other side it’s cooling down. A La Nina weather event has subsided, Australia's weather bureau said on Tuesday, ending a six-month spell of greater rainfall and cooler than average temperatures across the country's east coast. Ocean in the history of Queensland, Australia ’ s northern waters are warm with increased convection can. Cooler temperatures, clouds and rain, flooding and cyclones air and the... 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