A cold front moving through the Plains tomorrow will provide the focus for severe storm development during our first chase day. This front has really slowed down on the computer models over the past day or so and this is good because it will allow the warm sector environment to to east of it to become richer with potential due to solar heating. Something the NAM model has been consistently picking up on is the development of a small, sharp shortwave moving through Oklahoma during the afternoon. This shortwave generates a secondary low on that model that creates some pretty good directional shear over Central Oklahoma. Couple that with some incredible instability due to the high moisture in the area and you've got an interesting little severe weather setup to chase. This setup has shifted around from North Texas to East Kansas over the past few model runs, but it seems to be stabilizing over Central Oklahoma for now. The tornado risk tomorrow originally looked very slim due to the lack of good wind speed aloft, but now it is becoming hard to ignore the good directional shear and the great instability. So while it still isn't a high tornado risk, I would venture to say that one or two may touch down if indeed this area of good directional shear sets up.
I'll have an update tomorrow morning on how the setup has evolved and where we'll be targeting. Follow my up-to-the-minute updates on Twitter and Facebook.