These cirrus plumes may be warmer than the underlying anvil cloud due to the mixing of air from the warmer stratosphere. Termed above-anvil cirrus plumes (AACP), the emergence of such features on satellite imagery have been associated with severe weather events.
The cirrus plumes could be hotter than the surrounding anvil clouds due to the interaction with air from the higher, warmer stratosphere. These are known as above-anvil cirrus plumes (AACP). Their presence on satellite images is often linked to severe weather events.