Winter returns from tomorrow with snow at low levels, rain, gusts of strong wind and waves up to eight meters high. This situation will occur after several days of "anticyclonic, dry, stable weather, with generally weak winds and temperatures well above normal for the time of year" A cold front will enter on Thursday, after which "a mass of polar maritime character, cold, humid and unstable, will break out, which will cause a sharp drop in temperatures," says the State Meteorological Agency.