Polar trough to hit Europe: 20°C drop, supercells, tornadoes, snow risk

A deep Atlantic trough is set to collapse the prolonged September heatwave across Europe, bringing a 20°C temperature drop, supercell storms, floods, tornadoes, and possible snow, with Croatia among the threatened areas. The forecast is based on model projections and is subject to uncertainty in timing and intensity. This marks a sharp weather regime shift that could disrupt transport, energy demand, and agriculture.