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Huge hailstones, almost as big as a tennis ball, occurred during the wave of bad weather that hit Northern Italy in recent days, more precisely in Veneto in the provinces of Padua and Treviso. But what does this phenomenon depend on? What does the size of hailstones depend on? And why do some of the most violent hailstorms occur in the summer? Usually, most precipitation involves hailstones with a small diameter, but sometimes they can reach larger dimensions. How is this possible? In reality, everything depends on the strength of the ascending currents of cumulonimbus clouds: the more times they rise and fall, the more layers will form and the larger the ice grains will be. We explain in this video, going into greater detail from a scientific point of view on how hail is formed and the reason for this particular meteorological phenomenon. 00:00 Huge hailstones and in the summer, what does it depend on? 00:58 How hail forms 03:01 Why ice grains can be different in size 04:18 Why it hails in summer 05:18 Why hail can be transparent and opaque 06:14 Nucleation centers 07:02 A question of water purity Video Credit: -Davide de Marchi -Alessandro Moretto -Andrea Sergi -Alen.s.20 Photo Credit: -Kevain25460, CC BY-SA 3.0 -Chmee2, CC BY 3.0 OUR RECOMMENDED VIDEOS: • How does a hurricane form? The phenomenon... • The 5 differences between snow and hail • How do floods occur and why... • Why does lightning form? We'll explain... • Today's global warming is of... #hail #weather #geopop