If I had to guess what Dr Lyons is thinking, I'd say the vigorous trough diving SE thru central TX is gonna perhaps cause a slight, emphasize, slight N-NE turn, probably near the mouth of the Miss River. This is probably what the 06Z GFDL model is picking up on and maybe this will introduce some shear and slightly weaken KAT. Who knows? What I've been saying is anyone from LA to the western panhandle needs to take this seriously, becuz its such a large storm.

http://www.rap.ucar.edu/weather/satellit...amp;duration=10