Dic: a welter of something

• There is a welter of information on the subject.
• We are reducing the company's welter of development projects and will streamline sales and marketing.
• patients with a welter of confusing symptoms. 
• the welter of publicity that followed his engagement.

* * *

■ a welter of something: a large and confusing amount or number of something.

■ a large and especially badly organised number of things.

■ A welter of something is a large quantity of it which occurs suddenly or in a confusing way.

... LDOCE, CALD, Cobuild