Gustnadoes are defined as ground-based wind vortexes that sometimes form along the front of thunderstorms, MyFoxChicago.com reported Tuesday. While similar to twisters, gustnadoes are much weaker, with winds between 60 to 90 mph.
Senior meteorologist Henry Margusity of AccuWeather.com told Reuters that a gustnado could have pushed already strong winds to gusts of up to 60 mph or more.
"If you analyze the video, you can see that gustnado kind of coming across and moving through, and everything's twirling around as it goes through," Margusity said.
The footage also shows flags changing directions as the wind passed through, another move typical of gustnadoes.
'Gustnado' Eyed in Deadly Indiana Stage Collapse - FoxNews.com