March 20 Large Severe Weather Potential Forecast Discussion

This is a forecast discussion concerning a potentially large severe weather event Monday into Tuesday.
FORECAST DISCUSSION
The Storm Prediction Center has issued some startling outlooks for the Monday-Tuesday time frame.
Below are the two images.

The first image is the risk of severe weather on this time frame.
Immediately, we know that, should this develop, it would be a squall line. That would be a very sure thing.
The second image is an image of probabilities of severe weather.
Keep in mind- When there is a 30% risk of severe weather this far out in forecasting severe storms, that 30% area can turn into a MODERATE RISK for severe thunderstorms.

It also appears this will be a 4 day severe weather event: Today, Monday, Tuesday, and Wednesday.
Areas affected Today: Plains into the Midwest.
Areas affected Monday: Plains into the Midwest and a bit in the Ohio Valley.
Areas affected Tuesday: Plains into the south back through much of the Midwest (images above).
Areas affected Wednesday: Ohio Valley.

This has been a forecast discussion. More will be issued on this topic should they be needed.