nevreme

1. storm; bad weather
   Sinoćnje nevreme je oborilo nekoliko stabala. — Last night's storm knocked down several trees.
   Za vikend se najavljuje nevreme sa gradom. — A hailstorm is forecast for the weekend.
2. (u nevreme) a bad time; at the wrong time
   Izvini što zovem u nevreme. — Sorry for calling at a bad time.

In the second sense it is almost always used in the phrase «u nevreme».