Fallymeter is a free utility to measure the distance of a storm or the height of a precipice. How to measure the distance of a storm
- Press the start/stop button when you see the lightning
- Press the start/stop button when you hear the thunder
- Read the distance on the display
- Throw a little stone of about 1/2 inch (1 cm) diameter and press the start/stop button
- Press the start/stop button when the stone hits the ground
- Read the height on the display
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