CNN weather guy was showing map and stating the turbulence and storm went upwards of 53,000 ft, so no way to avoid it.
That doesn't mean the entire sky is covered in thunderstorms up to 53,000 feet. They could be isolated, or embedded, or in a nearly solid line. At any rate radar can paint these storms very effectively, so they can be avoided (with a competent operator).
The weather is reported by air traffic control as "tops up to 53,000 feet"; "isolated area of thunderstorms with tops up to 53,000 feet", etc.
But for sure, if one has tops that high, it has severe turbulence within it.