Narwhal Imperial Stout beer from Sierra Nevada Brewing Co., in Chico, Calif. is 10.2 percent ABV.
Sierra Nevada has been introducing a number of high-quality beers for several years that expand its reputation beyond that of a producer of the hoppy beers that initially brought it success. These include Kellerweiss, Tumbler, Porter and its Ovila Belgian line.
Narwhal Imperial Stout can be added to that list - an exceptionally rich and smooth ale that makes most other imperial stouts taste rough and uncouth.
I enjoy the wide variety of flavors that stand out in each brewery's offering of the style - some highlight dark fruit, others a wine-like tartness or maybe sugar flavors such as ...