There’s been an outbreak of waterspouts confirmed in the Great Lakes recently.

According to the International Centre For Waterspout Research, at least 25 waterspouts were confirmed over the weekend. Waterspouts are connected to a cloud and always occur over a body water and can be very dangerous for boaters.

Kevin Kacan with the National Weather Service says waterspouts are usually weaker than tornadoes.

“They can kind of be broken down between two types of waterspouts, those being tornadic and the more common ones,” Kacan said. “And probably most of what has been reported over the weekend, most of those are going to fall under the non tornadic waterspouts.”

Waterspouts often dissipate when they hit land, but the Weather Service still issues a tornado warning whenever they hit shore.

Kacan says the water conditions are ripe for waterspout formation this week with the sudden cold front moving in over the waters that have been warmed by months of summer heat.