This winter could become a unique and unique one for the United States, as climate phenomena such as La Nina and polar vortex face a turn that determines the direction of the ice of the Arctic.
A rare disruption of the exactly 100 or a strong increase in La Nina could completely change normal winter weather patterns, meteorologists say.
A forecast scenario shows the possibility of sudden subsidence heat (SSW) - a phenomenon of strong temperature increase in the Arctic's atmosphere - which could cause the center of the world to move south, bringing a deep cold air mass to many regions of the US.
As a result, lower-than-average temperatures, heavy snowfall and severe winter conditions began in December and lasted until January.
Conversely, if La Nina remains the main factor, winters will be somewhat cooler in the South and the East, while the North remains cold and wet, as previous La Nina seasons have recorded.
History shows that the North American region often experiences heavy snowfall and low temperatures, while the South tends to be less cold.
Sudden subtropical cyclone waves are the biggest turmoil of the tropical cyclone, said Judah Cohen, a climate expert from the Massachusetts Institute of Technology (MIT). Temperature in the Arctic could rise to more than 38 degrees Celsius in just a few days, pushing the exactly 20 degrees Celsius south more than usual.
El Nino and La Nina-based crop forecasts help agriculture, energy, healthcare and transport make important decisions, save millions of dollars and save lives as we prepare for severe weather, emphasized Celeste Saulo, Secretary General of the World Meteorological Organization.
According to experts, the impact of sudden heat in the earth's circulation will be more noticeable from the end of November to December. Historical data shows that if this scenario occurs, Americans could experience a cold winter and prolonged heavy snowfall, similar to the winter of 2000, when many areas of the North Central Coast endured nearly 3 weeks of temperatures below 0 degrees Celsius and more than 30cm of snow.
Therefore, forecasters warn that this winter could be unique, with La Nina, cold air and extreme cyclones affecting simultaneously.
Regarding cold air in Vietnam, the Vietnam National Center for Hydro-Meteorological Forecasting said that on November 18, the North will enter the coldest period of strength since the beginning of winter. The air pressure in the cold air mass will reach 1075mb; the temperature in the center will drop below minus 30 degrees Celsius.
It is forecasted that November 18 - 19 will be the 2 coldest days with the lowest temperature in the Northern Delta and North Central regions generally from 12-14 degrees Celsius, in mountainous areas from 8-11 degrees Celsius, in high mountainous areas below 7 degrees Celsius.
