<P> Cumulonimbus , from the Latin cumulus ( `` heap '' ) and nimbus ( `` rainstorm '' , `` storm cloud '' ) , is a dense towering vertical cloud associated with thunderstorms and atmospheric instability , 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 . Cumulonimbus progress from overdeveloped cumulus congestus clouds and may further develop as part of a supercell . Cumulonimbus is abbreviated Cb . </P>
<P> Cumulonimbus , from the Latin cumulus ( `` heap '' ) and nimbus ( `` rainstorm '' , `` storm cloud '' ) , is a dense towering vertical cloud associated with thunderstorms and atmospheric instability , 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 . Cumulonimbus progress from overdeveloped cumulus congestus clouds and may further develop as part of a supercell . Cumulonimbus is abbreviated Cb . </P>
what is the difference between cumulus and nimbus clouds
what is the difference between cumulus and nimbus clouds
cumulus ( `` heap '' ) nimbus ( `` rainstorm '' , `` storm cloud '' )
cumulus ( `` heap '' ) nimbus ( `` rainstorm '' , `` storm cloud '' )