UPDATE 1-Barnes & Noble posts loss, sees holiday weakness

* Q2 adjusted shr loss 30 cts vs. Wall St view loss 30 cts

* Sees challenging retail traffic during holiday season

* Sees FY EPS 33-63 cts vs previous view 59-89 cts

SAN FRANCISCO, Nov 24 (Reuters) - Barnes & Noble Inc (BKS.N) reported a quarterly loss on Tuesday and lowered its full-year earnings forecast, saying it expects traffic in retail outlets to remain challenged during the holiday season.

The largest U.S. bricks-and-mortar bookseller said its loss had widened to $23.96 million, or 43 cents per share, in the second quarter that ended Oct. 31 from $18.42 million, or 34 cents per share, a year earlier.

Excluding one-time transaction expenses from an acquisition, the company lost 30 cents per share, which was in line with analysts' expectations, according to Thomson Reuters I/B/E/S.

Sales rose to $1.16 billion from $1.11 billion.

Given its expectation that general retail traffic will remain challenged during the holiday season, Barnes & Noble said it now expected full-year earnings per share of 33 cents to 63 cents, down from a previous forecast of 59 cents to 89 cents. (Reporting by Nicole Maestri; Editing by Lisa Von Ahn) ((nicole.maestri@thomsonreuters.com, +1-415-677-3975; Reuters Messaging: nicole.maestri.reuters.com@reuters.net))