The phrase "a stunning impact" is correct and usable in written English.
It can be used to describe a significant or impressive effect that something has on a situation or audience.
Example: "The artist's latest exhibition had a stunning impact on the viewers, leaving them in awe of her creativity."
Alternatives: "a remarkable effect" or "an impressive influence."
The initiative had a stunning impact.
That's a stunning impact on our finances".
"The time that I first saw her singing in her mother's act in a club... it was such a stunning impact," Davis told "Good Morning America".
In its mix of airy lightness and strict lines — not least those ubiquitous knife pleats — it made a stunning impact on an audience fanning themselves against the unseasonable heat wave.
I felt it made a stunning impact at the London film festival in November and although it does not quite withstand the scrutiny of a second viewing, containing as it does elements of redundancy and naivety, it is certainly a film of incredible flair and formal, compositional brilliance.
He has made a stunning impact this season and is our leading try scorer.
But a few have stunning impact.
Here, senior Frances Lenahan is using a drop tower she and her team built to measure the impact-absorbing properties of materials like those in a bicycle helmet (seen here) and to test original materials inspired by the stunning impact resistance of a ram's horns.
But until white celebrities shift racial justice to the forefront of their priorities, and fully understand the stunning impact of their ignorance, an apology means nothing beyond: we may unwittingly perpetuate racism, but … wait for it … here's my apology.
This is the scene Ms. Shah accurately calls "a miracle," and it arrives near the end of "Unholy War" with stunning impact.
Every individual performance has to be at the highest level for the staging's stunning impact to come through.
