The vatch indications weren't strong, but the next moments might bring, some unpredictable new shift in their situation.

The hurricane's unpredictable shifts in direction created what was called the largest peacetime evacuation in the nation's history.

Vulcanism, unpredictable climatic shifts ... the whole nine yards!

One wonders how a person translating into Chinese would deal with unexpected or unpredictable tense shifts: Veni, video, vincam!

While Phish's improvisations are full of unpredictable shifts and leaps, this group sometimes seemed to be merely keeping time.

The unpredictable, unaccountable shifts of Wynand's favor were famous, and it was well known that few architects he employed once were ever employed by him again.

In the absence of any change in government policy this unpredictable downward shift in the aggregate demand curve would induce a fall in real output.

"T'ron found a reference to unpredictable shifts in this old Record Skin," F'lar said, seizing control.

It is, rather, a decision-making process that can be maddeningly opaque and vulnerable to unpredictable shifts in the political currents.

But unpredictable shifts in weather and high winds on the mountain, one of the nation's most dangerous peaks, can complicate many efforts, sending climbers scrambling down.