How many minutes after the last occurrence of an event is a thunderstorm reported to have ended?

A thunderstorm is reported to have ended 30 minutes after the last measurable occurrence of the event. This timeframe is based on standardized meteorological practices, which help ensure consistent reporting and data analysis. The 30-minute period allows for the dissipation of the storm's effects and ensures that any lingering weather phenomena associated with the storm are taken into account.

This timeframe is particularly important in aviation and weather reporting, where accurate depictions of weather events are crucial for safety and navigation. Understanding this 30-minute guideline helps in interpreting weather reports and forecasts accurately, providing vital information to pilots and meteorologists alike.