Thunderbird The American Classic Flavored Fortified Wine has made throughout California's prime grape growing regions. It has made from a grape with natural flavors and caramel colors. Remember the famous Thunderbird song...what's the word? Dubbed as the "American Classic," Thunderbird wine has been celebrated since the 1950s. It is a fortified wine, which was popular in the 1980s and 1990s. It has bottled at 17.5% alcohol by volume and best to serve chilled. Enjoy!