Related Clues:

• Storm warnings at sea
• Ocean motion
• Grows
• They may crash and break
• Surfer's need
• Puffs
• Signals goodbye
• Potential boat capsizers
• Permanent features
• Don't make them!
• Says goodbye without saying it
• Blows up
• Waxes
• Surfboard carrier
• They can follow the starts of 18- and 56-Across and 4- and 33-Down