'describes however' is correct and usable in written English.
You can use it to indicate how something is explained or described, especially when what follows presents a contrast or difference. For example: The textbook describes democracy as a system where all citizens are equal; however, in practice, some people are more equal than others.
The current language Pāṇini describes, however, still had a system of three basic pitch levels.
Beyond what Anderson describes however, Zynga has also recently managed to add in-app purchases to Words With Friends.
The centerpiece of the set by Ethel, the string quartet, was Dohee Lee's "HonBiBaekSan" ("The Ritual of White Mountain"), a programmatic piece that describes, however abstractly, the mystical interactions of a shaman and a group of mountain spirits.
What she describes, however, so gorgeously, is a dreamscape, a never-never land: Above in an unbroken circle, all around the wheel of the level world, lay silvery-blue clouds whose edges melted and changed into the pink and blue of sky.
The question of what kind of a world it describes, however, is controversial; there is very little agreement, among physicists and among philosophers, about what the world is like according to quantum mechanics.
Reference [4] describes, however, only the extraction of lattice parameters as structural identifiers for the spatial location of crystals with different phases that are present in the same sample.
In the cases you describe, however, I think the health risk is minimal.
The book was published to acclaim; the social dynamics it described, however, were from an earlier era.
THEY stood on Fifth Avenue across from Saks, three women who will probably not mind being described, however ungallantly, as no longer young.
With the exception of Intel in computer chips, none of the industries described, however, was actually a monopoly all were oligopolies.
From the details of the day she described, however, she did not seem to be eating nearly enough calories to maintain that strength.
