Measure the distance to a storm by timing the interval between seeing lightning and hearing thunder. This tool uses the difference in the speed of light and sound to provide an estimated distance.





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Measure the distance to a storm by timing the interval between seeing lightning and hearing thunder. This tool uses the difference in the speed of light and sound to provide an estimated distance.












Get hyper-local weather forecasts with a rain radar that updates every five minutes. Receive timely rain alerts, track storm cells in 3D, and view lightning strikes. Available for iOS devices.