waterspout
A waterspout was seen swirling off the coast of Oostduinkerke in Belgium's West Flanders province, in footage shared on Twitter on August 3.

This video, shared by Marie De Broe, shows the funnel cloud swirling off the coast of Belgium in the North Sea.

The region sees a few waterspouts every year in late summer and early autumn, according to reports. The funnel cloud forms when the air cools down in contrast to the warm seawater. Credit: Marie De Broe via Storyful