Because the weather has taken a sudden downturn: the mountain is about to get hit by a blizzard.

But then came a sharp, sudden economic downturn, driven by trouble in aerospace and real estate.

A sudden downturn could result in a world-wide economic contraction.

The sudden downturn in Vince's movie prospects set off all kinds of concerns.

The viability of proposed developments such as this may, however, now be called into question by the sudden economic downturn starting late in 2007.

Their popularity took a sudden downturn, however, when they recorded several blues songs in the early 1950s.

The back of the skull is relatively high and flat, with a sudden downturn just in front of the eyes.

Steve was alarmed at the sudden downturn in their fortunes, but he wasn't frightened.

The company added that although sales soared 44 percent, they still missed targets because of a sudden downturn in December.

Experts believe the huge rise in stock prices recently has made the market more vulnerable to a sudden, unpredictable downturn.