40º return to Spain

Last week, meteorologists They warned of a change in the trend Atmospheric, the arrival of heat, with an important rise in temperatures. As the days have advanced, the forecasts have not only confirmed the thermal ascent, they also seem to indicate that some more heat awaits us from the initially planned.

Temperatures rise. The last week of May will be marked by the first warm episode of the year, with temperatures above the 35º Celsius in some areas of the southern peninsular. The meteorologist Mario Picazo, in eltiempo.eshe warned of the possibility that the thermometers reach 40º over the next few days.

The State Meteorology Agency (AEMET) has issued An informative note To put ourselves on warning of the warm event we have ahead. In the note, Aemet warns of a “quite widespread and progressive” increase, which will leave during the days of Monday and tomorrow Tuesday temperatures between 36º and 38 in the Guadalquivir Valley and the 35º in the Guadiana.

Up. The forecasts They point out that the episode will be deepened as the week progresses, being Thursday and Friday the days in which the most heat is expected (although uncertainty is high in the predictions towards the end of the week). Aemet points out that these days the maximum temperatures will be around 35º in the Northern Plateau, 37th in the valleys of the Ebro and the Tagus and 39º in the Bajo Guadiana. The Guadalquivir basin will be the most affected: temperatures of between 40º and 42º are expected.

The exceptions. Although a good part of peninsular Spain and the Balearic Islands will witness this warm episode, there is an area that seems to maintain cooler temperatures. It is the Cantabrian and Northern Galicia area. North air currents will prevent the thermometers from triggering in this region. The Canary Islands are also expected to free from the episode, thanks to the Alisios winds.

Yellow warning. In addition to the informative note, the agency has also issued The first yellow notices by maximum temperatures of 38º. It will be in force on Wednesday during almost the whole afternoon in the Sevillian countryside region and in the central depression of Lleida.

Anticyclonic time The explanation to this sudden heat is simple and is on the Atlantic. It is an anticyclone, whose effects will be noticed in most of the territory. As experts explain, stability awaits at the atmospheric level with clear skies that will imply an increase in insolation and with it the increase in temperatures.

According to Details AemetAs of Wednesday, a Dana located between the Canary Islands and the Gulf of Cádiz, will be responsible for the situation worsening on Wednesday. He will do it by dragging “a mass of warm, dry and with suspension dust, of African origin, first on Andalusia and Mar de Alborán and later on the peninsular center.”

The first heat wave? Some They wonder now If we can talk about the first heat wave of the season. The answer, for now, is not. The answer, for now, is not. Although there is no precise definition of what a heat wave is, Aemet uses a defined criterion: It would be an “episode of at least three consecutive days, in which at least 10% of the stations considered registered maximums above the 95% percentile of its daily maximum temperatures series of the months of July and August of the period 1971-2000”.

As experts explain, this week’s episode is not expected to meet the three temporal, spatial or intensity requirements that define a heat wave.

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Image | ECMWF