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Un’imponente tromba d’acqua ha solcato il cielo sopra il lago di Costanza, questa mattina, mercoledì. Le immagini e i video del fenomeno si sono diffusi rapidamente in rete e mostrano l’alta colonna innalzarsi dalla superficie dell’acqua verso le nuvole.
Tromba d’acqua sul lago di Costanza
RSI Info 01.07.2026, 16:47
Perché si formi il fenomeno servono tre condizioni, come spiega SRF: aria fredda in quota su un’atmosfera instabile, venti deboli che spirano da direzioni diverse e una superficie d’acqua sufficientemente calda.
Quando l’aria a bassa quota è più calda di quella in quota, l’atmosfera diventa instabile: maggiore è la differenza di temperatura, più la colonna d’aria tende a salire, generando nuvole e temporali. Questi a loro volta richiamano ulteriore aria dal basso. Se l’acqua è calda a sufficienza, l’aria sovrastante si carica di umidità: il vapore condensa salendo, e il moto ascensionale può dar vita a vortici visibili.
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Meteo 30.06.2026, 20:30
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