This is a significant weather event, to the extent that if these numbers are accurate, it is worthy of news stories and weather warnings.
45 degrees in 24 hours is significant…in 15 minutes, it is exceedingly rare.
I find it hard to believe any reputable organization that was having an outdoor event for children carried on with this type of forecast. A state park would have known well ahead of time bc they need to make decisions regarding public safety.