They discharged dreadful showers attended with tremendous sounds, like the sounds of black clouds at Dooms-day* pouring torrents in the sky. * Kalameghayo (gen). The commentator says the word means (black clouds; but I prefer the sense given.
शरवर्षं ततो घोरं मुञ्चतोर्भीमनिःस्वनम्। सासारयोरिवाकाशे नीलयोः कालमेघयोः॥