The week will be marked by the atmospheric instabilitydue to the arrival of a cold trough and the possible formation of a DANA. This meteorological phenomenon will not only bring rain and storms, but also a significant relief from heatTemperatures will drop in many regions, and in some areas they will not even reach 30ºC.
This Tuesday the trough will cross the peninsula and leave Showers and thunderstorms in much of the north, accompanied by hail in the northeast and a significant drop in temperatures, according to the forecast of the State Meteorological Agency (Aemet). During the day, cloudiness will increase in the northwest, with rain moving from west to east along Galicia and the Cantabrian Sea. The formation of evolving clouds is expected in large areas of the north, east and the Balearic Islands, which could generate showers and storms in the northern and northeast thirds, with more intense and likely in mountainous areas such as the Iberian Peninsula and the Pyreneeswhere hail is not ruled out. Other regions in the north, east, centre and Mallorca could also be affected, although to a lesser extent, with the possibility of isolated dry storms in the northern plateau and the south-eastern mountain ranges.
Temperatures will fall across the board, especially in the case of maximum temperatures, with significant decreases in the northern third of the peninsula and some increases on the coasts of Andalusia, Melilla and the midlands of the Canary Islands. Even so, temperatures will exceed 36 degrees in valleys in the southern third, parts of Mallorca and the south of the Canary Islands. The highest temperatures in provincial capitals will be 38ºC in Malaga and Murcia; 37ºC in Cordoba and Granada; and 36ºC in Albacete and Seville.
18 provinces on alert
A total of 18 provinces are under warning for heat, rain and waves. Specifically, heat warnings will be in effect in Malaga (Andalusia); Majorca (Balearic Islands); Albacete (Castilla-La Mancha); Altiplano de Murcia and Vega del Segura (Murcia Region); and Gran Canaria, La Gomera, El Hierro and Tenerife (Canary Islands). Likewise, warnings for rain and storms will be registered in the Ribera del Ebro in La Rioja and the Iberian region of La Rioja (La Rioja); Castellón (Valencian Community); Álava (Basque Country); Central Navarre, the Navarrese Pyrenees and Ribera del Ebro in Navarre; Barcelona, Girona and Lleida (Catalonia); Soria (Castilla y León) and Teruel, Huesca and Zaragoza (Aragon), as well as Álava and Guipúzcoa (Basque Country). Likewise, the Cantabrian slope of Navarre will only have a warning for rain. In addition, warnings for coastal phenomena will be issued in Gran Canaria, La Palma, La Gomera, El Hierro and Tenerife (Canary Islands).
A DANA arrives on Wednesday
He Wednesdaythe trough with a cold core will settle in the east of the Peninsula, with a very possible evolution towards a DANA. Instability will move to the Mediterranean and cause the first significant episode of rain in the northeast of the peninsula, Levante and the Balearic Islands, According to the AEMET spokesman, José Luis Camacho, intense showers and thunderstorms are expected, occasionally accompanied by hail, in the Pyrenees, the Catalan coast and pre-coastal areas and the Balearic Islands, with less intensity in other areas of the centre and southeast. Likewise, in the north of Galicia and in the Cantabrian area, cloudy skies will predominate, with the possibility of weak and scattered precipitation, more likely and abundant in the eastern part and tending to subside in the west. In the rest of the Peninsula, clear skies are expected, with clouds developing in both Castillas and in the Canary Islands.
As far as thermometers are concerned, Camacho foresees a general decline except in the western part, where they will rise. The drop in maximum temperatures will be noticeable in inland areas of the eastern third. Even so, temperatures will exceed 36ºC in low areas of the southern third.
The day when temperatures rise again
For Thursday, Eltiempo.es indicates that the DANA could reach the Mediterranean, causing heavy rains and strong storms in the Balearic Islands. With uncertainty, it is expected that on Friday the DANA will continue to advance eastwards and be reintegrated into the general circulation of the atmosphere, restoring stability to much of the country. The weather portal expects that from that day on a thermal rise.