* Powerful and destructive: Just like a monster, the storm was capable of causing significant damage and upheaval.
* Unpredictable and menacing: Like a prowling beast, the storm's path and intensity were uncertain, creating a sense of fear and danger.
* Approaching with stealth and aggression: The imagery suggests the storm was advancing slowly and deliberately, building anticipation and a feeling of impending doom.
The simile uses the analogy of a monster to emphasize the storm's destructive nature and the sense of fear it instills.