Blessings · The sky and nature
What blessing do you say when you hear thunder?
When you hear thunder, the tradition gives a berachah (blessing) that ends with the words shekocho ugvurato malei olam — "whose strength and power fill the world." It is said once for a given storm, not at every clap.
A blessing for the sound of power
Thunder is one of those moments the tradition refuses to let pass as mere weather. The rolling sound overhead becomes a prompt: the same force that unsettles you is the strength and power that שכחו וגבורתו מלא עולם — fills the whole world. The blessing does not tame the storm; it lets the storm turn you toward the One behind it.
You say it once for the storm. When the thunder returns a few minutes later, the wonder has already been spoken; you need not repeat the words as long as the same storm continues.
The source
The Mishnah in Berachot 9:2 sets out the blessings for the powers of nature, and the Shulchan Aruch, the code of Jewish law, in Orach Chaim 227, records how they are said. Thunder and lightning are treated as two distinct wonders, each with its own words — the sound and the sight are not blessed with a single blessing.
What to do
At the first thunder of a storm, pause and say the berachah that ends shekocho ugvurato malei olam. One blessing carries the whole storm. Because thunder comes suddenly and passes quickly, and because the exact moment depends on where you are standing, it helps to have the words ready before the sky asks for them.
Source: Mishnah, Berachot 9:2; Shulchan Aruch, Orach Chaim 227.
Because thunder does not wait, Barkai — the blessings of the day, where the sky and the place tell you the moment — keeps the right words within reach for when the storm speaks first.
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