Hail signifies the false ideas that come from evil in our exterior natural selves. 'Hail of a talent weight,' as mentioned in Revelation 16:21, signifies direful and atrocious falsities. When the Divine Truth flows out of the heavens into the sphere encompassing evil spirits, which appears like a cloud formed from their evil affections and the falsities of their thoughts, then that influx is turned into various things, such as hail, in the case of people who think based on evils and falsities in opposition to the goods and truths of heaven and of the church. These evil spirits vehemently fight against these goods and truths. Hail signifies false ideas that destroy good and truth.

(références: Apocalypse Revealed 714)