Which cloud is associated with heavy rainfall, thunder, lightning, and hail?

✅Explanation: Cumulus-Nimbus clouds are tall, dense clouds that are often associated with thunderstorms and heavy precipitation. They are capable of producing heavy rain, snow, hail, lightning, and strong winds.
-Cumulus clouds are puffy, white clouds that are typically associated with fair weather.
-Stratus-Nimbus clouds are dark, gray clouds that produce steady rain or snow.

🔑Key Points:

• Cumulo-nimbus clouds:
Cumulonimbus clouds are the “thunderheads” that can be seen on a warm summer day and can bring strong winds, hail, and rain.
-Cumulonimbus (from Latin cumulus, "heaped" and nimbus, "rainstorm") is a dense, towering vertical cloud, forming from water vapor carried by powerful upward air currents.
-If observed during a storm, these clouds may be referred to as thunderheads.
-Cumulonimbus can form alone, in clusters, or along cold front squall lines.
-These clouds are capable of producing lightning and other dangerous severe weather, such as tornadoes and hailstones.
-Cumulonimbus progress from overdeveloped cumulus congestus clouds and may further develop as part of a supercell.
-Cumulonimbus is abbreviated Cb.
🛑Additional Information:: 

• Cumulus:
-They are generally formed at a height of 4,000 – 7,000 m.
-Cumulus clouds look like cotton wool.
-They exist in patches and can be seen scattered here and there.

• Stratus:
-As their name implies, these are layered clouds covering large portions of the sky.
-These clouds are generally formed either due to loss of heat or the mixing of air masses with different temperatures.
-They occur in the middle levels of the atmosphere.

• Nimbostratus clouds:
-Nimbostratus clouds are dark, grey, featureless layers of cloud, thick enough to block out the Sun.
-Producing persistent rain, these clouds are often associated with frontal systems provided by mid-latitude cyclones.
-These are probably the least picturesque of all the main cloud types.