I can’t ever remember them cancelling school in my day, but there were days where we basically spent the entire day in the hall. I remember once in 8th grade or so, they sent us to the halls and I got a glimpse out of door, and evil cloud looked to be about 200 ft off the ground, rolling over the football field. Not a twister, but was trying mightily to become one.
I did have my mom pick me up from elementary school once in the middle of the day when we lived in Tupelo, cause it was warning after warning.
Also in Tupelo spent many nights in the most primitive leaky, dark, spider infested storm shelter, until the the neighbors across the street built a nice, fancy one under ground.