out of a clear (blue) sky

z čista jasna, z nenadále

Out of a clear sky, or so it seemed to them. BNC

Only a slight chill in the air gave any indication that it was autumn, and even that was beginning to fade away as the sun blazed down again out of a clear blue sky. BNC

Over the past year, many a fund manager has had his confidence shattered as supposedly reliable shares that were the solid core of his portfolio ; IBM, Merck, Kellogg, Philip Morris ; crashed out of a clear blue sky. BNC

» CLIMATE