March 1st marks the beginning of the meteorological spring, the time when meteorologists expect the weather to gradually turn to spring colors.
According to the US Climate Prediction Center, the period from December 6th to March 3rd is expected to record higher than average temperatures across a wide area, especially in the East and Northeast - areas that have experienced many cold spells this winter.
However, AccuWeather expert Paul Pastelok warns that the impact from the polar vortex is still present. A "back" of the polar vortex is expanding to the northeast of North America, contributing to maintaining cold, snow and frost in the Great Lakes, Northeast and Central Atlantic regions in early March.
In the past winter, the polar vortex once attracted strong attention in late January and early February, when Arctic air poured deep into the eastern United States, creating record colds and blizzards. However, experts believe that cold spells are often the result of a combination of many atmospheric factors, including the Arctic Oscillations.
Polar vortex is a strong wind structure surrounding the Arctic. When it weakens or is disturbed, cold air may spill down to lower latitudes.
Notably, expert Judah Cohen of the Massachusetts Institute of Technology said that a sudden warming of the stratosphere is almost certain to occur at the end of the first week of March, which could cause the polar vortex to "separate in half".
According to Mr. Cohen, the eastern United States is likely to go through a more peaceful period until near spring. However, towards the end of March or early April, cold air may return due to the late impact of polar vortex separation.
Meanwhile, experts believe that this split may make Northwest America colder and have more storms in early March. In contrast, from March 5-15, many areas in eastern America are forecast to be warmer than average, causing snow to melt quickly and increasing the risk of localized flooding due to melting ice.
March therefore opens up with warm prospects, but the cold air in March has not completely disappeared as the polar vortex continues to be an unpredictable variable of the US weather.
Meanwhile, in Vietnam, according to the weather forecast of the National Center for Hydro-Meteorological Forecasting, near the morning of March 3, a cold air mass will pour down to the North, then continue to be strengthened around March 5-6.
March 3rd, the North and Thanh Hoa will be cold at night and in the morning, especially the mountainous areas of the Northeast will be cold. Other areas will have showers and thunderstorms in some places in the evening and at night, sunny days, especially the Central Central region from March 3rd will have rain, scattered showers and thunderstorms in some places.
Weather forecast for March, cold air is still active but the intensity is generally weaker than the multi-year average.
From the beginning of April, hot weather tends to appear early in the Northwest and the area from Thanh Hoa to Hue. In the second half of April, hot weather is likely to expand widely in the North and Central regions, before increasing intensity in the peak summer months from June to August.
