As you mentioned above, the impacts of Irene and Lee caused major problems, that said, the consistent, training and extremely heavy rainfall that is falling is made that much worse by it being tropical in nature. As tropical rainfall combines with the low heights/atmospheric "lag"/stalled to barely moving front/training rainfall...this forcing is extreme and should not be taken lightly. Of, course you mentioned all of this above, but the prospect of feet of total rainfall in a relatively short period of time means that there will be severe to historic creek/small stream/river flooding and days after the rain stops the crests will occur, causing even more flooding. South Carolina is getting pounding today. Lastly as you know, the rainfall that occurred prior to the more extreme rain has saturated the ground and run-off will rapidly occur causing extremely fast rises in streams, creek and rivers. Nice and informative blog as always.