La Nia forecast to shape weather event patterns
As the days get shorter and the temperature drops, winter comes once again.
Last winter, extremely cold air cooled the country, and a deadly storm left millions in Texas without power, killing more than 200 residents. Some reports estimate the death toll to be even higher.
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In this season, the meteorological winter begins December 1, expiring at the end of February 2022.
Forecasters have already made early predictions about the La Nia weather event Will shape the mood of the weather this winter.
According to NOAA (National Oceanic and Atmospheric Administration)The La Nia climate pattern consists of strong trade winds, which push warm water toward Asia and move up from the west coast, bringing cooler and nutrient-rich waters to the surface of the Pacific Ocean.
cold pacific waters push jet stream – Narrow bands of strong wind that generally move from west to east across the globe, including two polar jet streams and two subtropical jet streams – northward, which is dry in the South America and heavy rain in the Pacific Northwest and leads to the flood.
During a La Nia year, winter temperatures are warmer than normal in the south and cooler than normal in the north, notes the agency.
AccuWeather meteorologists reported on Thursday There are indications that this year’s La Nia will be weaker than 2020’s, in addition to a weaker polar vortex that could allow cooler air from the Arctic to move south into the Americas before December.
NS arctic polar vortex There is a strong band of winds in the stratosphere around the North Pole, about 10 to 30 miles above the surface.
during winter, arctic polar vortex expands, sending cold air to the south.
AccuWeather reports that the first waves of cool air, as well as some early snow, will hit the Northeast in November.
While snow and cold wind are forecast to reduce in severity and frequency briefly, forecasters said January would be the month to watch.
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Any thaw would come weeks later, AccuWeather said, with an increased risk of Nor’Easter at the end of the season.
The northern plains and the Great Lakes are also forecast to have a cold and icy winter, with the first round of lake-effect ice beginning in late November and December.
AccuWeather said that in the southeast and southern plains, December is expected to be mild, with the first frosts occurring later than usual.
Another major cold is expected over the southern plains in late January or February, but “nothing on a historical level” that was felt in Texas.
While the South America will have severe weather throughout the season, with rain and thunderstorms over the Mississippi and Tennessee Valleys, the Atlantic coast of the Southeast is predicted to experience drier-than-normal conditions.
Alternatively, the Pacific Northwest will have a wet winter, with early storms projected to end the wildfire season in the region and help fight the historic western drought.
Finally, AccuWeather said the Southwest will not receive early-season rainfall, leading to a continuation of wildfire season in December.
That said, rain is predicted to increase in California in January, and the Golden State and the Southwest will reportedly feel above-normal conditions this winter, although there is a chance of cold weather in addition to the chance of rain. Certain periods cannot be ruled out. To the inner southwest.
In his own forecast, Similar announcement of 2022 old farmer’s almanac That winter 2022 will be a “season of comparisons” with below-average temperatures and snow for New England, the Ohio Valley, northern parts of the Deep South and southeastern New Mexico.
The publication noted that, while temperatures will be relatively normal from eastern Montana through the Dakota and northeastern Colorado, snowfall there will be above average.
In the west, the Old Farmer’s Almanac said the Pacific Coast and Southwest will also feel cold, although most of the region will remain relatively dry.