Late-day storms in Chicago for Memorial Day

CHICAGO (CBS)-- Memorial Day will be mostly pleasant until storms arrive late in the day.

Highs will be in the 70s with mostly cloudy skies on Monday.

Outdoor barbecue plans may need to be moved inside on Monday night, as scattered thunderstorms and gusty winds are moving into the Chicago area.

According to the National Weather Service, strong winds are the biggest storm threat. There is no risk of tornados or hail with these storms.

Tuesday brings another round of strong storms that will impact evening commuters.

Cooler conditions arrive mid-week.

After a calm Saturday, the rest of the long weekend has been a bit unsettled.

The second day of the Sueños Music Festival in Grant Park was delayed for hours on Sunday due to severe weather , and that was not the only disappointment for festivalgoers, who ended up evacuating from the park before the night ended.

Lightning was blamed for a fire at a middle school in Joliet.

Lightning from storms Sunday afternoon damaged a building in Chicago's Tri-Taylor neighborhood.

A tornado warning was issued for Lake and McHenry counties on Sunday evening, but there were no reports of significant damage.