Good morning, and thanks for the interesting links. Not certain how to read them, though. Is the green area the ridge that is supposed to develop westward towards Texas? Looking at their current map (from the time they made the projections) http://www.cdc.noaa.gov/map/images/ens/z500anom_f000_usbg.gif suggests that it is already in (at least a weaker edge portion) that ridge. So their projection of it continuing back into central Mexico is really based on an area of lower pressure forming in Mexico and connecting with a similar area that is over central Texas, which then closes or move south out of Texas? Or am I way off in interpreting those maps?
