 SPOKANE, Wash.--BUSINESS WIRE--Clearwater Paper Corporation NYSE: CLW, a premier supplier of quality tissue and bleached paperboard products, today announced a preliminary update to the companys previous outlook for fourth quarter 2020 Adjusted EBITDA of 52 to 62 million. Due to significantly greater than expected demand in tissue, strong operating performance, and favorable cost trends, the company now expects Adjusted EBITDA for the fourth quarter of 2020 to be in the range of 71 to 