WorldWinds has successfully designed, maintained, and operated High Performance Cluster Computing (HPCC) systems for large scale model simulations since 2004. The firm has recently assembled systems for FEMA Flood Insurance Studies under the direction of prime contractors BAKER/AECOM and URS, Corp. The newest system includes 852 compute cores with 40 Gb/s Infiniband connectivity. The WorldWinds’ HPCC is capable of running the 2.5 million node ADCIRC SL-15 mesh, for a five day simulation, in less than 75 minutes – a rate of 100:1. To date the WorldWinds cluster has completed over 1,000,000 ADCIRC simulations. The system is housed in a DoD constructed facility that includes multiple power feeds, redundant cooling, a full-building UPS, and a generator capable of sustaining operations indefinitely. The Slidell, LA facility continued to be fully operational during and after Hurricane Katrina. WorldWinds has multiple HPCC systems that can be rented by customers who may need additional resources for a particular project.