(Reuters) – A snowstorm that pummeled the Midwest and grounded hundreds of flights will sweep across the U.S. Northeast on Monday, creating tough travel conditions ahead of the season’s first arctic blast, forecasters said.

The cold front that dumped more than 10 inches (25 cm) of snow on northern Illinois has prompted winter storm warnings and advisories as it also brings sleet and rain to New England and parts of the Middle Atlantic states, the National Weather Service said.

Accuweather, a private forecaster, said three to six inches (7.5 to 15 cm) of snow was expected to snarl travel in northern New York and New England. Local accumulations could be higher.

Conditions were expected to improve late on Monday as the system moves through the region. FlightAware, which tracks air travel, said 190 U.S. flights had been canceled on Monday after 1,800 were grounded on Sunday, mostly at Chicago’s two main airports.

The National Weather Service said another arctic air mass would spread over the northern Great Plains and Midwest in the next couple of days and then head east.

In the Northeast, “the cold weather will be more significant as we get into Thursday,” weather service meteorologist Brian Hurley said.

Accuweather said high temperatures would be in the single digits F (-17 to -12 C) to just below zero F (-18 C) from the Dakotas through Minnesota and Wisconsin as the cold air grips the region.

(Reporting By Ian Simpson in Washington; Editing by Daniel Wallis and Meredith Mazzilli)