WASHINGTON — All the spare parts appear to be coming together to create what forecasters are calling "Frankenstorm," a monster combination of high wind, heavy rain, extreme tides and maybe snow that could bring disaster to the East Coast just before Halloween next week.
Hurricane Sandy, having blown through Haiti and Cuba on Thursday, continues to barrel north. A wintry storm is chugging across from the West. And frigid air is streaming south from Canada.
If they meet Tuesday morning around New York or New Jersey, as forecasters predict, they could create a big wet mess that settles over the nation's most heavily populated corridor and reaches as far inland as Ohio.
With experts expecting at least $1 billion in damage, the people who will have to clean it up aren't waiting.
Utilities are lining up out-of-state work crews and canceling employees' days off to deal with the power outages. From county disaster chiefs to the federal government, emergency officials are warning the public to be prepared. And President Barack Obama was briefed aboard Air Force One.
"It's looking like a very serious storm that could be historic," said Jeff Masters, meteorology director of the forecasting service Weather Underground.
National Oceanic and Atmospheric Administration forecaster Jim Cisco, who coined the nickname Frankenstorm, said: "We don't have many modern precedents for what the models are suggesting."
Government forecasters said there is a 90 percent chance — up from 60 percent two days earlier — that the East will get pounded starting Sunday and stretching past Halloween on Wednesday. Things are expected to get messier once Sandy comes ashore, probably in New Jersey.
Coastal areas from Florida to Maine will feel effects, but the storm is expected to vent the worst of its fury on New Jersey and the New York City area, which could see around 5 inches of rain and gale-force winds close to 40 mph.