April 3-5 Severe Weather Outbreak Series: 6z NAM/GFS Significant Tornado Parameters (April 3)

Images first from the NAM, then GFS.
NAM starting at hour 18

The NAM did push up on this Significant Tornado Parameter overnight, allowing for a hotspot to develop in North Central Illinois. There is where we are likely to see at least some weak tornadoes.
Next, we will feature the GFS, starting at hour 24.

The GFS definitely puts Northwest Illinois up as a hotspot for tornadoes, and it appears that is where the action will occur.