"We've had 2 tornadoes near Perryville in the last 3-4 years that have impacted many people we've known. This includes killing 2 people that my wife and I both worked with for many years.... [in another situation] the grandmother of a friend of mine was living in a town that I could see was in the path of a tornado I was tracking in the Weather Defender (confirmed by Local Storm Reports). She lived in a trailer and was not in an area where sirens were sounded or could be heard. I called my friend and told her that a tornado was headed for the area in which her grandmother lived and she called her grandmother. She was able to get out of the trailer and to a safer location. Fortunately, the tornado was not on the ground long enough to get to her place, but my call was 15-20 minutes before it would've gotten there. Fifteen to twenty minutes may not sound like much, but it can mean the difference between life and death when a tornado is in the area. They were very grateful for my call.