Expires:202411250815;;606386 FZCA52 TJSJ 241940 CWFSJU Coastal Waters Forecast National Weather Service San Juan PR 340 PM AST Sun Nov 24 2024 Puerto Rico and the U.S. Virgin Islands Waters AMZ700-250815- 340 PM AST Sun Nov 24 2024 .SYNOPSIS FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS WATERS... A frontal boundary extending from the windward passage into the Atlantic Ocean north of PR and the USVI will induce a pre-frontal trough near the islands, interacting with a weak tropical wave, promoting unstable weather conditions. A north northwesterly swell will arrive later tonight, deteriorating the local marine and coastal conditions through at least mid- week. The frontal boundary will linger north of the islands while a surface high pressure builds from the western Atlantic to the central Atlantic. $$