At the end of the week there will be a phenomenon of instability in Spain, the traditional ‘cordonazo de San Francisco’.

Variations of maximum temperatures during the Veranillo de San Miguel.  AEMET

After the passage of the deep squall ‘Odette‘ what did it mark the time from Friday to Sunday, the week will start with lto the gradual arrival of the well-known ‘summer of San Miguel’ what is being celebrated September 29 and will leave a stable weather with a generalized thermal rise that will extend throughout the week until the weekend come rain and intense winds, as reported by the Meteorology Statal Agency (AEMET).

Precisely, this week, the weather forecast will coincide with the popular proverb that attributes a certain ‘time’ on certain days coinciding with the saints. In this way, after the summer of San Miguel, The weekend will arrive at a time consistent with what is also known as the ‘cordonazo de San Francisco’, as explained by the spokesperson of the AEMET, Rubén of the Field.

Specifically, he has indicated that this week begins with low temperatures, with frost during the early morning, Like the -2.6 degrees centigrade (ºC) in Puerto del Pico (Ávila) or -1.8ºC in Morón or Almazán (Soria). On the other hand, in Molina de Aragón (Guadalajara) has registered -0.1ºC in the early hours of Monday, what supposes the lowest temperature in September since 2006.

At northwest and in the eastern center of the peninsula, the thermometers have marked temperatures during the past morning of Monday that were 4-7 degrees below normal. “They are values ​​more typical of mid-November that of the end of September ”, he highlighted.

However, the spokesman has predicted that temperatures, both daytime and nighttime, will rise and will enjoy the “summer of San Miguel or the Quince“, What is it a “short” period of high temperatures.

In this way, the week will be marked by an anticyclonic situation in the Peninsula, with little pressure difference between different areas and therefore, with little air movement, except for some exceptions and with the clouds practically disappeared, which will lead to a thermal rise.

Thus, it has indicated that both Monday and Tuesday little cloudy or clear skies will predominate in practically the entire country, although on Monday there would still be abundant cloudiness in the morning in the eastern Cantabrian and Pyrenees, with light rains, which will tend to remit.

The Tuesday it will practically not rain anywhere in Spain except in the north of the more prominent Canary Islands, where the trade winds will accumulate enough cloudiness and where it will also rain this Monday.

Also, on Monday they will appear mists and fogs in the interior of the peninsula and on Wednesday the anticyclonic situation will continue and, therefore, the slightly cloudy or clear skies will be repeated and will also appear again the typical autumn morning mists and mists which dissipate in the middle of the morning.

But the ‘summer’ will be brief since the spokesman has advanced that already on Wednesday afternoon it will approach a frontal system in the northwest of the Peninsula that already that same day in the afternoon, and towards the night, it will leave rains in Galicia and in a weaker way, in the west of Asturias and the province of León.

As for the wind, the days from Monday to Wednesday the wind will blow much weaker than last weekend, although there will still be some strong intervals, especially, Tramontana in the northeast of the peninsula and the Balearic Islands, although the tendency is for the winds to diminish.

Del Campo adds that Yes, the Levante wind will strengthen, which will blow strongly in the Strait and in the surroundings of the Alboran Sea.

The Temperatures will rise these days and will reach 30 or 32ºC in the Guadalquivir valley, so that we will talk about temperatures between three and five degrees above normal in the center and southern half of the Peninsula it is included “Something above” five degrees compared to normal climatological values ​​in Andalusia. For its part, in the northern third the thermometers will be around normal values ​​and even they will be somewhat cooler in the Cantabrian.

As of Thursday, the “summer of San Miguel will say goodbye abruptly”, since the situation will change “radically” as a result of the passage, that same day, of the frontal system that had already begun to enter the previous day through Galicia.

Also, after this a storm will deepen in the north of the Iberian Peninsula that will fully affect. First on Thursday the frontal system will rainfall in Galicia in the Cantabrian communities, north of Castilla y León, and also in the environments of the Central and Iberian systems and in the Pyrenees.

That day, on Thursday, there will be a notable drop in temperatures, Specially in the northern half, where the decline can be up to eight ten degrees compared to the previous day. Conversely, thermometers will rise in the communities bathed by the Mediterranean and also in southern Andalusia, since winds from the west will blow and these areas arrive overheated.

Thus, he has pointed out that while in the interior of Murcia Alicante will exceed 32ºC, in the interior of the Cantabrian Sea will not even reach 16 or 18ºC.

On Thursday the wind will blow with intensity in the Cantabrian communities and already on Friday and the weekend the possible deepening of the storm in the Cantabrian area, specifically in the Cantabrian Sea could cause un autumn storm of wind and rain in large areas of the Peninsula, especially in Galicia and other points of the extreme north, where the rainfall may be strong and persistent.

The wind in general will blow from the west and southwest component with strong gusts in large areas of the Peninsula and the Balearic Islands, specially in coastal and mountain areas, and temperatures will continue to drop. Snow will appear again in mountain areas of the northern half, especially in the Cantabrian Mountains, Pyrenees and north of the Iberian system.

We will therefore go from the summer of San Miguel to a situation of unpleasant weather with possible adverse phenomena, mostly due to rain and wind, traditionally known as the cordonazo of San Francisco, alluding to San Francisco de Asís, whose commemoration is celebrated on October 4“, Has summed up.

According to tradition, around this time of early October the first major autumn storm used to take place. Although this has not always happened like this, the truth is, according to the spokesman, that “this year it will arrive faithful to its appointment” the cordonazo of San Francisco if the forecasts are met.