Lightning Without Thunder — What Causes
Generally, thunder is rarely heard more than 10 to 15 miles away from the strike.
Sound doesn't travel forever. While light can move through the atmosphere for hundreds of miles, thunder has a much shorter range. What Causes Lightning Without Thunder
If you see flashes, a storm is likely within 100 miles. Generally, thunder is rarely heard more than 10
Safety tips for outdoor summer events
If you'd like to dive deeper into the science of summer weather: (the "Flash-to-Bang" method) What Causes Lightning Without Thunder