Sacado del blog de Jeff:
However, this is still larger than the total energy Katrina had at landfall, and Ike's storm surge potential rates a 5.1 on a scale of 1 to 6.
Creo que no hace falta traduccion, 5.1 en una escala del 1 al 6.
Parece que el ojo va a pasar por encima de Galveston.