On Wednesday 30 September, the eastern Cantabrian coast and western Pyrenees will get the most persistent rain as an Atlantic front moves in from the northwest. Downpours could be locally heavy in both areas. Much of the Peninsula will remain cloudy before conditions slowly improve from north to south.
Rain will focus on the northwestern half of the country. Galicia and the western Sistema Central should also see impressive accumulations, though totals are expected to remain below those in the eastern Cantabrian area. AEMET said the front would affect much of the Peninsula during the afternoon, with the most persistent rain expected in Galicia and the western mountain areas of the north.
Cloud cover will slowly retreat during the day, but northern and western regions will remain the most unsettled. The eastern interior will also see isolated showers, with storms potentially strengthening in eastern Castilla-La Mancha and the southern Iberian System.
Fog and mist will affect the southeast, the Balearic Islands, Alborán, the Strait of Gibraltar and high areas in the far north. Visibility may change sharply beyond the basic rain zones.
Temperatures will move in different directions across Spain. The forecast follows a sharp change after a warmer period, with cooler temperatures expected in several parts of the country, including the north. Maximum temperatures will fall in the northwest but rise in the far southeast and northeast. Elsewhere on the Peninsula, they will stay broadly stable, with slight increases in isolated areas. Night-time temperatures will climb in central areas and fall in the west. Little change is expected on the islands.
Catalonia faced serious weather warnings on 29 September, when very intense rainfall and the risk of flash flooding prompted red and orange alerts. Those warnings concerned the previous day and do not indicate emergency conditions on the eastern Cantabrian coast or in the western Pyrenees on 30 September.
Wind will add to the unsettled weather. Moderate southeast winds are forecast in the Balearic Islands and along Mediterranean coasts, while Alborán and the Strait will have moderate easterly winds.
Across the interior of the Peninsula, the Cantabrian area and Galicia, winds will be moderate and southerly. Very strong gusts are possible in the Cantabrian Mountains.
The Canary Islands will have calmer conditions, with mostly clear skies and moderate trade winds. Cloud could develop over the interiors of the more mountainous islands, where an isolated shower is possible.
The north will face persistent rain and stronger winds, while the south and the Canary Islands will be more stable. For residents and travellers, the basic hazards are heavy rain in the north, sudden drops in visibility and possible very strong gusts in the Cantabrian Mountains. Rain and wind are expected to coincide in those areas.
The northern front will dominate Wednesday, bringing unsettled conditions across the Peninsula. Spanish media reports citing AEMET also named Galicia, Cantabria, Castilla y León and northern Extremadura among the regions expected to receive rain on 30 September. The reports describe a forecast and weather warnings, not confirmed emergency impacts on the eastern Cantabrian coast or in the western Pyrenees.
