in for

Preposition

About to encounter or undergo; usually said of unwelcome things in prospect.

Japanese Meaning

これから嫌な事態や困難に直面する、つまり、苦労や問題に見舞われる可能性が高い状態を示す

If the weather forecast is accurate, we're in for a rough week.

天気予報が正しければ、私たちは厳しい一週間に直面することになっています。

Sense（1）

About to encounter or undergo; usually said of unwelcome things in prospect.

The forecasters say that we are in for a very cold winter.