How to understand that soon there will be hail?

Oh, you do not need this hail! It’s better to see the site https://us.meteorologist.pro more often, but in general there are signs of worsening weather If during a thunderstorm large dark clouds come with noise, there will be hail; the same if the clouds are dark blue, and in the middle of them are white. If the thunder rumbles for a long time, rolling and not sharp, this indicates a continuation of bad weather. If the thunder rumbles continuously, there will be hail.