The phrase "a series of unpredictable" is correct and usable in written English.
It can be used to describe a sequence of events or phenomena that cannot be anticipated or foreseen.
Example: "The weather this season has been a series of unpredictable changes, making it difficult to plan outdoor activities."
Alternatives: "a sequence of unforeseen" or "a chain of erratic".
Balancing these twin experiences, President Clinton embraced a series of unpredictable positions that in turn angered both conservatives and the leaders of traditionally liberal civil rights groups.
Ms. Liebman said the market slowed briefly in early August, after a credit rating agency downgraded the nation's debt rating and the financial markets took a series of unpredictable swings.
It will also be virtually impossible for the ECB to impose effective conditionality on debtor countries, meaning that the ECB can only hope that a series of unpredictable political decisions in member states will go in its favour.
The byproduct of that sobering math has been a series of unpredictable and heart-rending phone calls over the last 10 years to notify family members that yet another fragment of their child, spouse or parent has been identified, followed by the wrenching question of what to do with remains that, in some cases, are no more than particles of bone.
Exposure of pregnant female rats to a series of unpredictable stresses during the final week of pregnancy generates behavioral deficits and molecular changes in the offspring similar to those observed in schizophrenic individuals.
In it delay frustration is indexed as the number and duration of responses made on a response key during a series of unpredictable and unsignalled delay periods, which interrupt the completion of a simple computer-based tests.
For example, sampling the fossil record for marine vertebrate and invertebrate taxa from the Phanerozoic every ten thousand years over twenty million years revealed a series of irregular and unpredictable extinction pulses over time resembling "a forest of small events punctuated by a smaller number of high spikes".
"Redacted" itself seems less interested in making a single argument than in staging a series of angry, unpredictable and sometimes incoherent debates between the soldiers.
After analyzing the sound, Dr. Kramer and a colleague discovered that it was not a continuous rustle but a series of brief, unpredictable bursts just thousandths of a second long.
A series of events, some involving the mysteriously unpredictable yuan, forcibly and with escalating violence shake Eric out of his torpor.
That may have been a factor in his measured yet often unpredictable playing on a series of vintage originals, ranging from gemlike ballads ("Always and Forever," "Find Me in Your Dreams") to loose-limbed post-bop ("Question and Answer," "Soul Cowboy").
