Storm winds snap and roar because of the rigging, flying flags stretched taut, their colorations fierce opposed to a slate-gray sky

https://rafaeltkpl686.wordcanopy.com/posts/george-washington-and-the-first-flags-leadership-in-symbol-and-stitch

Storm winds snap and roar by using the rigging, flying flags stretched taut, their hues fierce in opposition t a slate-grey sky.