Rough seas and high winds meant that both American and Spanish rounds were being blown off target, which resulted in a severe disadvantage for the Spanish gunners, as well as resulting in several stray rounds falling on San Juan houses or other buildings.
Both American and Spanish rounds were being blown off target, as well as resulting in several stray rounds. This was what rough seas and high winds meant. These several stray rounds were falling on San Juan houses. These several stray rounds were falling on other buildings. Target resulted in a severe disadvantage for the Spanish gunners.