Learn Hardcore Russian: Скорее всего, завтра пойдёт град.

Скорее всего is an introductory adverbial phrase meaning “most likely” or “chances are.” It expresses a high degree of probability and qualifies the whole statement that follows.

Why is there a comma after Скорее всего?

Because Скорее всего is a parenthetical (introductory) expression. In Russian, such phrases are set off by commas to separate them from the main clause.

What part of speech is завтра, and how is it used here?

Завтра is an adverb of time meaning “tomorrow.” It indicates when the action (hail falling) is expected to happen.

Why do we use пойдёт instead of будет when talking about hail?

Verbs like идти/пойти (“to go/fall”) are idiomatic with precipitation (rain, snow, hail) to denote the start of the weather event. So пойдёт град literally means “hail will start falling.” You could say будет град, but it’s less natural for forecasting.

What case and number is град, and why is it used that way?

Град is in the nominative singular. In impersonal weather constructions (no explicit subject), the weather noun remains in the nominative as the logical “subject” of the verb.