2 Verbs to Use for the Word thunderclouds

The weather grew hot and oppressive, and over the lowlands of Virginia there brooded a sullen thundercloud.

In the ceiling certain pink and well-fed cherubs still supported unnatural thunderclouds through which Juno forever drove her gold-wheeled car and team of patient peacocks, smiling high and goddess-like at the squalor beneath.

2 Verbs to Use for the Word  thunderclouds