Lightning at Coors Field, July 7, 2014 (Jack Dempsey/AP)

Spectacular summer storm clouds gathered at several big league parks across America Monday night.  Turbulent skies greeted fans at  Coors Field in Denver, Great American Ball Park in Cincinnati, and Fenway Park in Boston.

Coors Field (Denver)

At Coors Field, dazzling cloud to ground lightning in the 7th inning suspended play for 56 minutes as the Rockies took on the Padres.

Great American Park (Cincinnati)

Stunning mammatus clouds packed the heavens during play between the Reds and the Cubs. Storms did not interrupt the game. (Mammatus typically signal storms in the distance rather than overhead.)

Fenway Park (Boston)

In Boston, a tornado-warned storm passed just north of Fenway Park, and the stands were evacuated – delaying the start of the game between the Red Sox and White Sox 39 minutes. The picture below, from a WeatherBug network camera, shows a low-hanging scud cloud in the distance. Some mistook this for a funnel cloud, but no actual tornado or funnel cloud was reported, even though radar indicated rotation in the thunderstorm.