If your fish are in there and you have no other place to keep them they'll be fine. If they're not in there yet, I wouldn't add them.
There's no way that 'sandstorm' is worse than whats gets churned up for 2 or 3 days after a hurricane passes through. Catfish live in the bottoms of the nastiest muddiest rivers in the world. If their gills were incapable of filtering out some mud, they'd have died off eons ago.
Not that there's a need to uselessly subject them to any undue stress. The water we provide to our fish is a paradise compared to what they'd all be living in if they were wild. (Which may be some slight way to make up for keeping them in such a confined space)