Weather: Key to severe cold in Spain: 15 degrees below normal and snow in Pamplona, ​​Logroo, Burgos and Vitoria Listen to this article

Winter starting from Thursday, strong wind and snow storm will return winter to Spain, Alert to State Meteorological Agency (Emet), The reason for this is the entry of an air mass from the Arctic, which will practically drop the temperature across the country to values ​​​​of 5 to 10 ° below normal. In addition, Aragon and Catalonia will see strong northwesterly wind speeds of up to 100 kilometers per hour, intensifying a cold feeling, and very low levels of snowfall up to 400 meters in the extreme north. of the country Although temperatures will begin to improve on Sunday, the storm coming from the southwest will release rain and snow into the center and south on Monday and Tuesday. The keys to winter shock in early April are:

what is going to happen. “The anticyclonic ridge located in the Atlantic will move from south to north and add to the high pressures in Greenland, which, together with a storm located in the central Mediterranean, will form a corridor that will transmit air masses. much colder than the north”, describes Samuel Byner, meteorite climatologist, As a result, “abnormally low temperatures, both maximum and minimum” will be reached and there will be “snowfall in the mountainous systems north of the peninsula”, Emet highlighted.

When does it start and how long will it last? The first signs of change, Bayner explains, occur this Wednesday: “The wind will turn and a flow will enter from the more humid northwest, rain will be more frequent in the Cantabrian and Pyrenees slopes and a progressive drop in temperature will begin. , But the real change will occur at noon on Thursday, with the arrival of a cold mass, which will increase precipitation to the north and eventually spread over almost the entire country except at points in the interior and east. Snowfall will already be significant in the north, especially in the Bay of Biscay and the Pyrenees, where levels will drop to 1,000 metres.

North and Inland – Temperatures will continue to drop 3 degrees to 5 degrees in the northern plateau and Ebro Valley, but the real blow of cold will be on Friday, when the wind will turn north and become more pronounced. cold air entry. The collapse will be more than six degrees to the center and north and the level will drop below 600 meters, even 400, in the northern half. As far as rain and snow are concerned, the worst day will be Friday, while cold and frost will be the main characters of the weekend.

There will be a gradual improvement in the altitude on Sunday, but the atmosphere will remain quite cold in the beginning of the week. Meanwhile, a storm will make landfall in the Atlantic, releasing rain and snow in the highlands of the Canary Islands and reaching the Gulf of Cádiz on Monday. “There will be an interaction between the Atlantic wind that pulls the storm and the Arctic wind that will continue near us, so rain and snowfall are expected in the center (levels will be at 1,000 meters) and south (1,500) on Monday and Tuesday. ”, explains Weller.

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Polar, Siberian, Arctic cold? Amet spokesman Rubén Del Campo explains that the adjective that is added to cold “depends on where the mass of the air comes from”. “Since the peninsula is in the middle latitudes, cold winds come from the north and are generally called polar. Depending on their origin, they can be oceanic (wet) or continental (dry). The Siberian is a type of continental polar mass, so it is said to come from Siberia, while at very high latitudes and close to the pole, such as it is called an arctic.

Is this a cold snap? No, it is not as cold as a cold wave from the point of view of meteorology. Emmett defines this concept as “an episode of at least three days in a row, with at least 10% of stations recording a minimum which is between the coldest 5% in January and February”. As in April, Emmett doesn’t consider this a wave, but instead qualifies it as an “episode of acute cold.” Bayner prefers the term nortada, which RAE defines as “fresh north wind that blows for a while”, which, as this expert explains, “generally causes low temperatures and significant snowfall in the north”. “.

Is this normal in April? Yes, it is common for winter or summer to increase in the spring. Last year, spring began with a similar episode of falling temperatures and unusually low snowfall. The winter hug on 1 April was also caused by the entry of arctic air in 2019. “The beauty of this Nortada is that it is quite powerful. At 1,500 meters, the temperature would be -4º/-6°, which is too low to date”, explains Byner.

How much will the temperature drop and where will it be coldest (and least), The maximum on Friday and Saturday will be between 5º and 10º above average values ​​for almost the entire country, while in Navarra, the Iberian system, eastern Cantabrian and north of Castilla y León, the difference will be less than 10º/15º. However, in the extreme south and Canary Islands, the values ​​will remain near normal. The maximum temperature will not exceed 5° on Friday in vila and Burgos, with a normal 15º/17° this time of year.

Minimum, more the same. They would be 5º to 10º below average values ​​over almost the entire peninsula and Balearic Islands, even 10 to 15º in the Valencian Community, Aragonese Pyrenees and Iberian systems. Rest of the country will be between 3º to 5º, while the values ​​will be normal in the extreme south. “Frost is going to be significant on Friday and it will freeze in capitals like Soria or Teruel. On Saturday they will be more powerful and almost normalize, with -5 degrees in vila”, highlights the meteorite expert, who fears the effects of these late frosts on some crops and fruit trees such as almond and cherry trees.

Where and how much snow? Significant snowfall will occur in the Cantabrian Mountains and the Pyrenees on Thursday afternoon, with levels dropping to 1,000 metres. At the end of the day, the northern Iberian system and western Pyrenees will see snowfall below 800. The “problem will be snowing” on Friday as levels drop. “It could be in the northern half below 600 metres, even 400, very low for the time being,” highlighted Bayer.

Heavy snowfall is expected in the Pyrenees, Cantabria, the Basque Country and Navarra, and in the north-east of Catalonia, inland Galicia and the Ebro Valley below 1,000 m. It will snow in capitals such as Vitoria, Logroo, Pamplona and Burgos, but it is not expected in vila or Segovia “because rainfall in Nortadas is limited to the Cantabrian slopes and the Pyrenees, after these mountains the wind reaches the rest. Due to the relief effect, the country’s drought and rainfall reactivate only in the Iberian System, the Sierra Nevada and Beticus”. Snow will also be “very unique and remarkable” in the Balearic Islands from 500 meters on Friday. On Saturday and Sunday, rainfall will be confined to the Cantabrian slopes and the Pyrenees. “More than half a meter may have accumulated in the exposed points of the Cantabrian mountain range and Pyrenees this week,” summarizes Bayner.

Alert Map. Notice for Thursday In Andalusia (by air), Aragon, Asturias, Cantabria, Castilla y León (snow), Catalonia (rain, wind, snow and bad sea), Navarra, La Rioja (snow) Valencian Community (wind) and Melilla (wind and bad ) sea). They are all yellow in colour, the lowest level of the three that contain the meteorite. On Friday, the Balearic Islands and the Basque Countries join And due to snowfall in Aragon, Cantabria, Castilla y León, Catalonia, Navarra and the Basque Country, and due to wind in Aragon and Catalonia, and rough seas in Catalonia, the warning increases to orange. Valencian Community.