Overview
- A subtropical 'Anticiclone africano' is producing the first substantial late‑May heat in Italy with consensus forecasts showing peak warmth through Wednesday and Thursday, May 27–28.
- Daytime highs are expected to reach about 34–35°C in the northern plains and selected inland cities, with a hotspot triangle centered on lower Piedmont, Emilia and eastern Lombardy cited by model runs.
- Thursday, May 28 is flagged by multiple services as the likeliest date for cooler Scandinavian air to enter the Mediterranean and create strong convective storms such as supercells and squall lines.
- Areas most exposed to severe weather and large hail include Triveneto, parts of central‑south Italy, the Alps, Prealps, Apennines and the Adriatic side while rainfall and gusty winds will cool affected zones.
- Forecasts diverge on how long the high will hold after the initial peak and on the storm placement, so local warnings and updates will be needed because small shifts in the upper low can change where severe weather strikes.