Moisture is beginning to break out towards Memphis, Tn this morning. The moisture will take some time to move north in to the KFVS viewing area. Plus it has to overcome some dry air at the surface. This means that a lot of it will evaporate, but the evaporation will lead to evaporative cooling for a while. This is one of many steps that need to take place for this storm to play out the way I've been forecasting.
It is always an extremely nervous time waiting on a storm to develop that in reality isn't anywhere to be seen. It truly is a blind leap of faith with the computer models.