Lightning is the second leading cause of storm-related deaths (flooding is first). Lightning can strike up to 10 miles outside of a thunderstorm, literally a bolt from the blue. The danger from lightning can persist for 20-30 minutes or more after a thunderstorm has passed. The National Weather Service does not issue watches or warnings for lightning by itself. However, the National Weather Service does advise that if you see a lightning bolt and hear the thunder in 30 seconds or less, you seek shelter and wait 30 minutes before resuming outdoor activity.
If a person can hear thunder, or see lightning, the danger already is present. A clear, sunny sky overhead with storm clouds nearby can still be dangerous.
Referees and Coaches should adhere to the following: