'Bombogenesis' Takes Aim At US Northeast As Snow Sweeps South

'Bombogenesis' Takes Aim At US Northeast As Snow Sweeps South


Snow would fall quickly during the day, at a rate of several inches per hour, with the storm intensified by the "bombogenesis" effect, private forecaster Accuweather warned.

"Bombogenesis," also known as a "bomb cyclone," occurs when a storm's barometric pressure drops by 24 millibars in 24 hours, greatly strengthening the storm.

The effect is seen along the Northeastern coast every winter, but this storm will be particularly powerful, said Judah Cohen, a visiting scientist at Massachusetts Institute of Technology.

"This one is unique in how quickly the pressure is going to fall," Cohen said. "The pressures could rival a Category 1 or Category 2 hurricane."

An arctic air mass will remain entrenched over the eastern two-thirds of the United States through the end of the week.


At a news conference, South Carolina Governor Henry McMaster warned people in the eastern part of the state to stay indoors if possible and to keep pets indoors.

"If they can't get in the heat, they'll freeze to death and they'll be gone," McMaster said. "And the same thing will happen to people. So you have to be careful about that."

In the state's historic city of Charleston, the winter storm shuttered carriage-horse tour companies after a horse slipped and fell on ice during a tour on Tuesday, city spokesman Jack O'Toole said.

The wintry mix and low wind chills caused widespread power outages and icy roads, making commuting treacherous for millions of Americans from northern Florida to southern Virginia, the National Weather Service said.

The storm was starting to snarl air travel in the southern United States, with about 50 percent of flights canceled at airports in South Carolina's Charleston and Myrtle Beach and Savannah, Georgia, according to the FlightAware tracking service.

Two to 3 inches (5-8 cm) of snow were expected in northeastern Florida, coastal Georgia and South Carolina, weather service meteorologist Bob Oravec said. The weather service said its Tallahassee office had measured snow and sleet accumulation of 0.1 inch (2.5 mm) on its roof, the first snow in Florida's capital since 1989.

Boston Mayor Marty Walsh ordered schools closed on Thursday, warning city residents that the peak of the storm would occur during the day, making travel extremely dangerous.

"Both rush hours will be affected," Walsh told a news conference. "Be patient. With the amount of snow we're getting here, we could be plowing your street and a half hour later it could look like we haven't been there." 

Source: (ndtv.com)