Category: Cloud-a-Day

This is the Cloud-a-Day we send to our subscribing members.

Saturday 11th October 2025

These dark waves rolling in over Chilliwack, British Columbia, Canada on a layer of Stratocumulus are the cloud features known as fluctus.

Spotted by Philip Tingey (Member 45,142), they are also known as Kelvin-Helmholtz wave clou…