Legendary helpful member
Bad weather has been on the horizon for a few days, and AEMET - the Spanish Met. Office - have now issued an orange (Important risk) warning, with a probability of more than 80%, for Sunday until Wednesday inclusive. The following is verbatim from the warning, albeit edited and translated by myself.
Storm Gloria will be located between the eastern peninsula and the Balearic Islands, being isolated and quasi-stationary in the area for at least Sunday, tending to move later to the south.
The combination of the position of Gloria, and the powerful anticyclone cantered on the British Isles, will favour the entry of a mass of cold air from the interior of the continent, which, together with the humid air of the Mediterranean, will cause snowfalls in very low levels of the eastern peninsular.
The pressure gradient will be very intense in the Mediterranean and Balearic area, with strong or very strong north and northeast winds and gusts that could locally exceed 100/120 km/h. The state of the sea will be very adverse, with wind intervals of up to force 10, and waves that could reach 7 meters in the coastal areas of the eastern peninsula and Ibiza.
The situation will be accompanied by intense, persistent and locally strong rainfall in the same areas, with accumulations throughout the episode that could reach 150 cm.
The snowfall will be copious from about 300/500 meters in the eastern peninsular and can accumulate up to 10 cm in some areas.
El Tiempo, the other website I like after AEMET, are a bit more optimistic and are forecasting only (!) 6 cm of rain and much lower wind speeds.
Conclusion - it's impossible to accurately forecast the weather, but be prepared. If you've got anything that might suffer, like open sun umbrellas, collapse them.