Just noticed the Euro and UKMET are way slower than every other model to move the storm through Houston. GFS CMC NAVGEM and ICON have the storm at the LA border at 72hrs. EURO/UKMET have it stalled over San Antonio.
Assuming the more progressive solutions verify, the rainfall duration for Houston will be much shorter. Maybe just a 6-10 hr deluge which can easily drop 10" of rain. The 40" totals won't stand much of a chance though.