At what distance should event organizers begin monitoring weather conditions for lightning?

Monitoring weather conditions for lightning is crucial for the safety of participants and spectators at outdoor events. Event organizers typically start monitoring for lightning at a distance of 10 miles. This is based on the understanding that when lightning can be seen or heard from a distance of 10 miles, there is a significant risk that it can strike the event area.

Starting to monitor weather conditions from a distance greater than 10 miles, such as 20 miles, may not be practical, as it can lead to unnecessary evacuations and disruptions. It is essential to have a fine balance between ensuring safety and allowing the event to proceed as planned. Organizers generally establish a routine of monitoring within that 10-mile radius, as this gives enough time to implement safety measures should storm conditions approach.