** Shares of American West Metals AW1.AX rise as much as 13.7% to A$0.083, their biggest intraday pct gain since October 16

** The mineral explorer says upon drilling at its Storm Copper Project in Canada, assays confirm outstanding copper grades

** Around 17.4 million shares change hands, 2.2x the 30-day average volume

** Stock has risen 55.8% this year, including session gains

(Reporting by Roshan Thomas in Bengaluru)

((Roshan.Thomas@thomsonreuters.com;))