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    Mystery sounds from storms could help predict tornadoes

    Scientists narrow down causes of low-frequency rumbles emitted before twisters form
    by Nicola Davis Nov 25, 2019 2 minutes
    Researchers were able to pick up audio clues eight minutes before a tornado formed. Photograph: Dave Hall

    Mysterious rumbles that herald tornadoes could one day be used to predict when and where they will strike, according to researchers.

    Storms emit sounds before tornadoes form, but the signals at less than 20Hz are below the limit for human hearing. What causes these rumbles has also been a conundrum.

    Now researchers said they have narrowed down the reasons for the sounds – an important factor in harnessing the

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