In our area this time of year, thunderstorms can pop up quickly any afternoon. These storms produce frequent lightning which can strike up to 20 miles away from the cloud. If you can see the lightning, or you hear thunder, you can be struck. Follow these guidelines if you are outside during a thunderstorm storm: Seek shelter immediately inside an enclosed building or a hard-topped vehicle. Never stand under trees, or open enclosures such as a picnic canopy. If you are in or on open water, go to land and seek shelter immediately. Stay indoors for at least 30 minutes after the storm passes.