Gregory the Dialogist

Hast thou entered into the treasures of snow, or hast thou seen the treasures of the hail, which I have prepared against the time of the enemy, against the day of battle and war? What else must be understood by the 'snow' or 'hail,' but the cold and hard hearts of the wicked? For as charity is designated by warmth, so also in Holy Scripture wickedness is wont to be designated by cold. For it is written, As a cistern maketh its water cold, so doth its own wickedness make cold the soul. …

Morals on the Book of Job, Book XXIX ↗

Thomas Aquinas

After he considers these things about the changeableness of light and darkness, he comes to diverse changes of the air, according to which the air varies as storm or calm. He begins with the snow and the hail saying, "Have you entered the storehouses of the snow, or have you inspected the storehouses of the hail?" By the storehouses of the snow and the hail he means the water vapors which have risen up from which snows and hail are generated. …

Commentary on Job ↗