Last hours of summer heat at times also sultry, from Sunday a thunderstorm perturbation will be able to weaken the African anticyclone present on Italy. Its passage, however, will not be painless, in fact it will leave behind a flaw that will insert Italy in a markedly unstable circulation where thunderstorms will be on the agenda. The team of the site www.iLMeteo.it informs that after a more stormy Saturday on the Alps, Prealps and locally also on the western plains of the North, from Sunday thunder, lightning and even hail will affect most of the northern and central regions. It will be the beginning of a somewhat eventful period, in fact also in the next week thunderstorms may break out in many Italian regions both in the North and in the Center-South, especially in the afternoon. Sardinia and Sicily, on the other hand, will be excluded from the phenomena. In this context, temperatures will undergo a physiological decrease in the presence of bad weather or overcast skies and a marked increase in the presence of the sun. IN DETAIL Friday 4th. In the north: sunny and warm, but with thunderstorms in the Alps. In the center: sunny and hot. In the south: good weather and warm climate. Saturday 5. In the north: usual thunderstorms in the Alps, dry and often sunny elsewhere. In the center: light rains on Lazio, clouds and sun elsewhere. In the south: often very cloudy. Sunday 6. In the north: it gets worse with more and more widespread thunderstorms. Middle: worsening from Sardinia to the rest of the regions. In the south: immediately unstable in Campania, then also in Basilicata, sun elsewhere. From Monday frequent thunderstorms in many regions.