In the diary of St. Faustina, Our Lord revealed to her that he sometimes speaks to souls through storms...
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"Write that I am speaking to them through their remorse of conscience, through their failures and sufferings, through thunderstorms, through the voice of the Church." 1728 (90) Diary, Divine Mercy In My Soul
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The night before Our Lord gave St. Faustina the chaplet, she saw in a vision a great storm threatening the earth, and she had no other recourse but to pray the words of the chaplet she heard interiorly. "As I was praying in this manner, I saw the Angel's helplessness: he could not carry out the just punishment which was rightly due for sins." - 474-475 Diary
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I gathered from this that the chaplet of Divine Mercy may be efficacious against storms as well.
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Eternal Father, I offer you the Body and Blood, Soul and Divinity, of Your Dearly Beloved Son, Our Lord, Jesus Christ, in atonement for our sins and those of the whole world. For the sake of His sorrowful Passion, have mercy on us and on the whole world.
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Link:
How to pray the Divine Mercy Chaplet
Jesus, I trust in you.
