What is the highest wind speed that defines a Storm Warning?

A Storm Warning is issued when sustained winds of 48 knots (55 mph or 89 kph) or greater are expected over water. This warning indicates that dangerous conditions are imminent, and mariners should take all necessary precautions to ensure safety.

Setting the threshold at 48 knots helps differentiate between various levels of weather advisories. For instance, lower wind speeds, such as 34 knots or 47 knots, may indicate other advisories but do not meet the criteria for a Storm Warning. Thus, understanding this specific threshold is crucial for boaters to remain safe and prepared during severe weather conditions.