A high risk has been issued for Day 2 (tomorrow) by the Storm Prediction Center. This has only happened 3 times before. Not even April 27, 2011 had a high risk on Day 2. That shows you just how bad things could get.
At this point in time, if you are in the high risk and have time, I would suggest you evacuate. This looks to be EXTREMELY DANGEROUS, and it is extremely possible that a super tornado outbreak occurs.
DO NOT take this lightly. 'High Risk' is the highest possible category for severe weather. Get your shelter ready now. Gather food and water supplies. I am sincerely concerned for the high threat of loss of life and property tomorrow in the High Risk.
To any amateur storm chasers: Do not chase tomorrow. This is high above what most chasers can chase.