Related Clues:

• Low-altitude cloud
• Low gray cloud
• Thin, white cloud
• Wispy cloud
• Type of cloud
• Low cloud
• A kind of cloud
• Low-altitude cloud formation
• High cloud
• It's white and fleecy
• It's white and wispy
• Wipsy white cloud
• Wispy white cloud
• Light wispy clouds
• That's high, thin and loud after a century