The phrase "a severe turn" is correct and usable in written English.
It can be used to describe a significant or drastic change in a situation, direction, or condition.
Example: "The project took a severe turn when the main investor pulled out, leaving the team scrambling for alternatives."
Alternatives: "a drastic shift" or "a significant change".
But Americans' priorities shifted dramatically in 2008, as the economy took a severe turn for the worse.
BEIJING — China's diplomatic relationship with Australia, so recently flourishing despite occasional spats, this month has taken a severe turn toward the governmental equivalent of thrown dinner plates.
On the way he took a severe turn for the worse, lingered for a while, and died in the holy month of Ramadan.
The outbreak of SARS, or severe acute respiratory syndrome, took a severe turn for the worse in China and Hong Kong in recent weeks and also expanded its grip in Canada.
But after the bot started to learn from inappropriate conversation with real people, the tone of its tweets quickly took a severe turn for the worse.
It was 8 48 AM last Wednesday morning when a 25-year-old third mate made a severe turn while at the helm of the Sewol, after which a loud bang resounded throughout the ship's five floors.
(You end up wanting Melody -- whose life, we find, has taken several severe turns for the worse -- back).
As the BBC's Dougal Shaw shows here, the building's refurbishment by Studio RHE includes a steep ramp with a severe hairpin turn, enabling cyclists to ride directly into the front atrium and down to the parking bay.
Saulnier: The film takes a severe left turn and sort of evolves or devolves into an insane siege thriller, but I think people who are in the scene really respect it for its authenticity, but the key, like yourself, is that you don't have to bring the knowledge.
The severe turn by Mr. Bush's campaign was particularly notable since he appears to have an advantage over Mr. McCain in New York: the support of the state Republican organization, a ready-made machine to contact potential voters and make certain they go to the polls.
Concluding that she had no choice but to cooperate — otherwise, her son would surely pay a severe price — Tanesha turned over her bank statements, as the N.C.A.A. demanded.
