One of my friends who does the science behind some of the weather channels modeling efforts is really sounding the alarm about the chances for the low pressure system meandering back off the coast Sunday-Monday then coming back as a Cat 2-3 storm near Galveston Wednesday.
This is in the realm of a 5-7 day tropical storm prediction which is highly uncertain, but he thinks the likelihood of it staying onshore and slowly moving NE without any re-intensification (what is the best-case for all involved) is only about 25%.
Meanwhile even the official NWS forecasts are stamping more than 20 inches of rain on the coast over the next 7 days.