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In his study and weekly world weather forecasts, the climatologist noted that frequent and intense weather changes in spring are a sign of increased meridian atmospheric circulation.
“In the next few days, such a transfer will be predominant. It is true that it can be of two types: north and south directions. The first is related to the entry of cold air and the second is mainly related to warm air (south winds do not always carry warm air). This weekend, the weather will travel to Lithuania and the entire Baltic region from the polar latitudes, more precisely from the Norwegian Sea and the North-East Atlantic.
It is not very cold, and traveling through open sea areas and crossing the Scandinavian mountains will be even more transformed. As a result, on the weekend it will stay relatively cool, in places with rain, and at night, when it clears, the air temperature will drop to 0 ° C or less. As mentioned above, the weather is very typical for early April, ”said G. Stankūnavičius.
He also explained that tomorrow, Saturday, the low pressure zone northeast of Iceland will strengthen a lot, turning into a deep cyclone on Sunday with a center in the southwest of the Barents Sea, and the cyclone circulation system will cover all of Scandinavia, the Baltic region. and northwestern Europe. Around the same time, a high pressure ridge will strengthen over the northeast Atlantic, which will then cover the entire Greenland-Iceland region.
“Such an interaction between two very intense but opposite pressure signs will lead to a strong transfer of sea air from the Arctic to western and central Europe.” First on Sunday, strong winds and sleet will hit the Faroe Islands, Scotland and Northern Ireland, then winds from the north and northwest will sharply intensify in the North Sea, the English Channel, the Belgian coasts of Belgium and France ( until 22-27 mrs).
Tuesday night will cool down in northern Germany, the Benelux countries and much of France. On Wednesday, a cold snap will hit southern France, the Pyrenees, much of northern Spain, Catalonia (Spain) and even the Balearic (Spanish) and Sardinian (Italian) islands. The lowest minimum temperatures will be in mountainous areas: in Scotland down to -14 ° C, in the Ardennes down to -7 ° C, in the Massif Central, in the French Alps down to -10 – -12 ° C, in the Central Cordillera ( Spain) down to -4 – -6 ° C. There will be anomalous cold in almost all central and southern Europe “.
On Sunday, G. Stankūnavičius said that, as the aforementioned cyclone intensifies over the Barents Sea and northern Scandinavia, the north winds in Lithuania will be replaced by a moderate wind from the southwest.
“Therefore, a sudden and intense cooling is not expected during the holidays in Lithuania. On the contrary, the air temperature will rise to 7-12 ° C during the day. On Tuesday, an active atmospheric front will pass through Lithuania from the west, bringing rain and sleet, and on Wednesday it will reach low-pressure areas from the south, likely to cause sleet in eastern Lithuania as well. In the second half of the week, Lithuania, like much of Central Europe, will be in the area of influence of the high cold valley, so a cool climate with rainfall is expected ”.
At present, he explained, due to rapidly changing conditions of radial equilibrium, large-scale pressure fields in the Northern Hemisphere are changing. This is happening not only in the North Atlantic, but also in Eurasia and the North American-Pacific sector.
“Siberian (Asian) anticyclone debris should completely disappear in the coming weeks, Iceland’s low-pressure zone will weaken and the Aleutian low-pressure zone will be dormant until autumn. Such transformation of the main centers of atmospheric activity also affects meteorological forecasts, during this period their validation is poorer, especially at mid-latitudes.
If a warm spring has not yet arrived in our country, it does not mean that it will not arrive elsewhere. In the next week, due to the predominant movement from the south, the Urals and Western Siberia will be very hot, where even on the Arctic coasts the air temperature will rise to 0 ° C. “
According to the climatologist, anomalous warm weather is also expected in the northern states of the United States and central Canada, where the average air temperature will be at least 8-12 ° C higher than normal. Abnormal cold weather will occur in most of eastern Siberia and Alaska.
“Long-term weather forecast data suggest that from the middle of the month, higher pressure fields will be more common in Eastern Europe, so warmer and drier weather is expected in the second half of the month.” .
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