The phrase "a powerful current" is correct and usable in written English.
It can be used to describe a strong flow of water, air, or metaphorically to indicate a strong influence or trend.
Example: "The river was known for its powerful current, making it dangerous for inexperienced swimmers."
Alternatives: "a strong current" or "a vigorous flow".
Supporters of the president argue that by winding down two wars that between them cost thousands of lives and more than a trillion dollars, Mr Obama is at once responding to a powerful current in public opinion and at the same time freeing up "national-security bandwidth" to engage with the world as it is, in all its complexity.
Mr. Holder is swimming against a powerful current.
Instead, he was seized and carried by a powerful current straight into the pier.
That loss of prestige, and a desire to reclaim its influence, has created a powerful current in Najaf today.
Handmade spaghettini, with a dozen clams and a powerful current of tomatoes and garlic, harks pleasingly back to Little Italy.
Listening to the roar of howler monkeys rise and fall in the forest, I drifted dreamily off and was caught up in a powerful current.
An official in Jersey acknowledges that this movement constitutes "a very powerful current".
This is a very powerful current of work and family that carries most people down the storm drain of their lives, then washes them out on to the beach of old age before they've even admired the view.
He observed: "She was connected with a very powerful current but she couldn't disconnect herself from it," adding: "She had a kind of curious incandescence under the skin".
Meanwhile, a dangerous mixture of China's historical humiliation and its staggering economic success has unfortunately bred a strong sense of complacency on one level and an equally powerful current of hubris on another.
By the late 1960s generalised dissidence (among an admittedly minute number of intellectuals) was becoming focused on such issues as censorship and legal rights, but the 1970s saw the growth of a much more powerful current of dissidence expressed as the demand by Soviet Jews for the right to leave the Soviet Union altogether.
