Learn about this proven method used as an early tornado warning system for rural residents.
Here's a proven, early tornado warning system for rural residents, drivers and those who depend on electrical warning systems. The magnetic field of a funnel cloud registers at approximately 4.5-5.2 kHz and will resonate on any battery-powered AM radio. I use the older radios (no clips) and have familiarized myself with audio signals that are normally present. During a storm I just turn down my radio to 5.3 or as low as it will go (usually there are no stations there). Lightning will be heard as intermittent static. Any twister within a 20-mile radius will he heard as a constant hum. I tried it last spring, heard the hum and headed for the basement. We had a touch down five miles away. It works! Spread the word, please! It saves lives!
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