i was in Michigan the day of this outbreak...we had i think 6-8 twisters in the state....none near me. But i will remember the sky that day as long as i live...the clouds were so low, almost tree top level..and the layers were going all directions at once..and going at least 50-60 MPH...you just knew something very bad was happening some place....
I lost the link when I came back to post but the number of tornadoes that day is in the article:
https://weather.com/safety/tornado/news/2020-04-03-april-
1974-super-outbreak-tornadoes