With the caveat that we are in meteorologically uncharted waters (i.e., we've never had a storm of this nature in the modern meteorological era), I'd like to offer some speculation that might be useful:
Sandy may cause more than $100 billion in damage, more than Katrina. You can refresh your memory about Katrina's damage here.
The computer models that I trust are getting more and more in synch on a record storm.
|Last night's European model with a 944 mb center just before landfall.|
|This morning's U.S. GFS with a 936 mb (!) center just before landfall.|