Louisiana is using an unstructured grid that allows it to concentrate the nodes in areas where the analysis is needed, near inland waterways and flood prone areas. This enables them to adjust the detail to where it most needed, making it as precise as 10 meters for certain inland areas, while as much as five kilometers in the ocean. You can see some of this at their website.
About the time of Katrina, the computer models "were much coarser and had minimum resolutions of only 100-200 meters," said Casey Dietrich, a post-doctoral researcher at the Institute for Computational Engineering and Sciences at University of Texas in Austin.
Dietrich has been running compute models at the Texas Advanced Computing Center at the University of Texas to assess the impact of the storm surge on Texas.
Emergency planners in both states take the data generated by the university researchers and incorporate it into geographic information systems.
"They can look down at neighborhood scale and say 'on this street along the levy we're going to have water this high,' and plan accordingly," Dietrich said.
Comparing the capability today with that at the time of Katrina, Dietrich said: "I think we have a very strong understanding of how hurricane wave storm develop and how they can threaten a coastal environment."
The models are now being tested by actual events.
The winds were picking up early last night in New Orleans, said Bred Jacobs, CIO at Loyola University in the city. Jacobs was there for Katrina.
The university suspended operations on Tuesday, and students are sheltering in place. There is ample food and supplies, Jacobs said by email.
"We worked to harden out IT facilities quite a bit since Katrina and are hoping to stay operational in our main data center," Jacobs said. "Tapes we shipped off site and we placed our hot-site on alert as a precaution."
Patrick Thibodeau covers cloud computing and enterprise applications, outsourcing, government IT policies, data centers and IT workforce issues for Computerworld. Follow Patrick on Twitter at @DCgov or subscribe to Patrick's RSS feed. His e-mail address is email@example.com.