Ike's a big bad boy. He's not an incredibly intense storm, "only" a cat 2 with about a 50-50 shot of making cat 3. But his incredible windfield size (larger than katrina) has built up a MASSIVE surge. They're forecasting 27-30 feet in parts of Houston.
We had 3-5 foot surges here yesterday, and Ike was halfway across the Gulf moving the other way. Large swaths of Pinellas County, which is extremely low-lying, were flooded. They recorded up to 10 feet of surge in Pensacola.
If Ike's forecast track doesn't jog to the right, Houston is screwed.