Meteo – A long period of below average temperatures begins in Europe after the historic heat in April « 3B Meteo

A historic first part of April ends for Europe due to two intense heat waves out of season which have broken hundreds of temperature records both in the plains and in the mountains. France, Spain, Austria, Switzerland, Slovenia, Croatia, Slovakia and Bosnia are among the nations most affected by the effects of the powerful anticyclone. For several states it had never been as hot as it is now before April 15th.

April 15-22. The thermal anomaly is expected to ease over the course of the week due to colder air which will lead to a drop in temperatures of even more than 15°C. The cold air, which will not be as exceptional as the hot air, will partly reach our Peninsula, also bringing an increase in instability. Precipitation will mainly affect the Center and South, especially the eastern slopes

If there were not hundreds of heat records, a frequent number of unseasonal heat waves, a number of records broken by a wide margin, positive anomalies involving large areas of Europe, there would be nothing strange in seeing ups and downs in spring. The record heat has also significantly accelerated the growth of plants which are very sensitive to the incoming cold. Early flowering of fruit trees is a recurring event in recent years.

April 22-29. The influx of relatively cold air into Europe continues with below-average temperatures in the central-northern states and the Mediterranean area. The anticyclone will still be unbalanced in the Atlantic and allows the entry of unstable currents from Northern Europe towards the Mediterranean basin.

May 29-6. The model shows little change from the previous week. Even with a weak signal, there is the possibility that a scenario of below-average temperatures in Europe could continue.

This scenario is also confirmed by the AIFS experimental model which remains in its position from multiple exits.

This change in circulation derives from a new baric rearrangement due to the progression of the Rossby waves. The new pattern is supported by the diluted effects of the stratwarming that occurred on March 4th.

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