Heaps of rain clouds are called

STRATOCUMULUS clouds are spread out heaps of dense cover that rise higher in the atmosphere. Dark, flat NIMBOSTRATUS clouds often produce rain or snow. CUMULUS clouds look like giant heads of cauliflower because they are white and fluffy. STRATUS clouds are spread out, dull clouds usually found at ground level.

Explanation:

Explanation:

STRATOCUMULUS clouds i guess this