The coastal trail winds underneath flying flags of caution, surfers reading the air even though breakers hurl white thunder ashore

https://rylanttpm655.bearsfanteamshop.com/sea-signals-and-sacred-symbols-the-u-s-navy-s-flags-and-what-they-mean-1

The coastal route winds under flying flags of warning, surfers interpreting the air even as breakers hurl white thunder ashore.