In some ways I was lucky, as the facts changed, I changed my mind about what was the best way to navigate through the weather (click here to view the Nexrad weather images that dictated the changes I made as the flight progressed). I was constantly conscious that weather, too, changes, and that thunderstorms build and lightning strikes suddenly and quickly. The Stormscope is capable of displaying cloud-to-ground and cloud-to-cloud lightning as it occurs, but it can't know beforehand that lightning is about to strike. Merging the data from XM and the Stormscope, and remembering that the XM Weather is delayed and better for strategic planning and not for tactical decisions, I made the best guess of what lay ahead. I knew I had relatively clear air behind me and I also knew from the XM display how narrow the area of weather was ahead of me.