Lightning thunderstorm 06.15.09. Lightning strikes at McIntosh Lake. Boulder County, Colorado. Around the earth there are 100 lightning strikes per second, or 8,640,00 times a day. What is commonly referred to as heat lightning, is actually lightning too far away to be heard. However, the storm may be moving in your direction. There are approximately 100,000 thunderstorms in the U.S. each year. Buy this Artwork as Fine Art Print, Canvas Print, Custom Framed Giclee Print and Greeting Cards. Guaranteed to liven any decor. Great Conversation piece too! All artwork has a 30-day, no questions asked, return policy. Plus All transactions are secure and private. Worldwide FAST shipping to your door.