What made the 1974 tornado outbreak different from others?

[Metalicwx220]

YOU see this setup with any other severe weather outbreak... Why did this one cause so many violent tornadoes?
If that is a setup for a 1974 outbreak I guess we are going to see one tomorrow because the Nam 24hours is showing this

[Cyclenall]

YOU see this setup with any other severe weather outbreak... Why did this one cause so many violent tornadoes? If that is a setup for a 1974 outbreak I guess we are going to see one tomorrow because the Nam 24hours is showing this *Image Removed*

You foreshadowed the modern era Super Outbreak on April 27th...which I'm not sure was but close to. The date was just a bit off.

The map posted only provided a small chunk of the information required to gauge how bad a tornado outbreak might be. There is a lot more information like wind shear, moisture, lapse rates, instability, etc. that comes into play.