NEW YORK -- A winter storm passing through the U.S. Midwest may bring more snow to the Northeast and Mid-Atlantic today, threatening to scrub flights and snarl travel in the regions.
A winter storm warning was in effect for Chicago until 9 p.m. local time Monday night. The city was expecting to receive 4 to 8 inches of snow from a storm that has already canceled more than 1,000 flights and left thousands in Illinois without power, AccuWeather.com and the National Weather Service said.
New York City may get as much as 3 to 5 inches today, with most of the accumulation during the morning rush hour before the storm switches over to rain. Boston may also see 5 inches.
"This isn't going to be a huge blizzard, but it's going to come through and disrupt travel not only on the ground, but in the air," said meteorologist Tom Kines at AccuWeather in State College, Pa. "People are getting really sick and tired of the snow, and of shoveling and plowing."
The latest round of snow heading for the eastern United States follows a storm that dropped about 3 inches in New York on Saturday, bringing the city's total winter accumulation to 55.6 inches, more than triple the average through mid-February, Mr. Kines said in a phone interview.
As of early Monday evening in New York, 1,208 flights within, into or out of the United States had been canceled, while 3,305 were delayed, data from Houston-based FlightAware showed.
More than a quarter of flights out of Chicago's O'Hare International Airport were grounded, according to FlightAware.
Flights heading to O'Hare were being delayed an average of 31/2 hours because of weather conditions, according to the Federal Aviation Administration. More than 13,000 power outages in Illinois were reported by Ameren Corp. as of Monday afternoon.
Snowfall this morning was expected to make travel "treacherous, especially during the morning commute," the weather service said in a midafternoon advisory Monday. Slippery roads and travel difficulties should be expected, it said.
The low temperature in Chicago today may be 22 degrees, according to AccuWeather. The low in New York may be 32, while Boston is set to drop to 29.
Weather may warm up for the second half of the week, reaching a high of 54 in New York by Friday, compared with an average of 43 for the date, the AccuWeather forecast shows.
About an inch of rain is expected to fall across the U.S. Northeast Friday, according to AccuWeather's Mr. Kines.
"Temperatures should be at or above normal for a good portion of the week," he said. "It's possible that we're going to see a significant amount of rain in the East on Friday, so with all that snow on the ground, there could be some flooding issues."
Nearly 90 percent of the Great Lakes area is covered with ice. This is the second-highest ice coverage in the past 35 years, running slightly behind the winter of 1993-94. The normal peak ice coverage is roughly 40 percent.
Meanwhile, a series of storms will continue to affect the Northwest.
Rain will drench the coastal areas from Oregon through Washington, with spotty rain showers over interior valleys.
The New York Times contributed.