WASHINGTON – When Hurricane Sandy becomes a hybrid weather monster some call "Frankenstorm" it will smack the East Coast harder and wider than last year's damaging Irene, forecasters said Friday.

The brunt of the weather mayhem will be concentrated where the hurricane comes ashore early Tuesday, but there will be hundreds of miles of steady, strong and damaging winds and rain for the entire Eastern region for several days, according to the National Oceanic and Atmospheric Administration.

The hurricane has killed at least 20 people in the Caribbean, and just left the Bahamas. It is expected to move north, just off the Eastern Seaboard.