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Roof blown off school in Granite Falls; 3 hurt by lightning in Lakeville

More strong and severe storms are possible later Sunday.
A hole in a shelter building from a lightning strike on Saturday. 

A hole in a shelter building from a lightning strike on Saturday. 

Severe storms that blasted through southern Minnesota on Saturday left a trail of damage and resulted in three people being evaluated after a lightning strike in Lakeville. 

The storms initiated in southwest Minnesota during the midday hours and by the time they reached the Granite Falls area they were producing damaging winds, including gusts strong enough to blow part off the roof off the high school in Granite Falls. 

Security camera footage captured the moment, showing a large section of what is believed to be the gymnasium roof being launched off the building towards the parking lot. 

The damage sent water flowing into Yellow Medicine East High School, though the extent of the damage hasn't been addressed publicly yet by school officials. Granite Falls also saw significant tree damage, many of them uprooted by the powerful wind. 

As the storms marched east they remained severe, narrowly missing the core of the Twin Cities metro area. Lakeville wasn't so lucky as the complex produced extremely heavy rain, frequent lightning and strong winds. A lightning strike at Casperson Park blasted a hole in a shelter building. 

Lakeville PD said there were 40 people at attending a party at the park when the storm hit, and three people had to be evaluated by medical professionals due to the bolt of lightning. Fortunately, none of the patients suffered critical injuries. 

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