(Updates with forecast for U.S. South, Southeast and Midwest along with school, government and Amtrak cancellations for Tuesday)
By Mary Wisniewski
CHICAGO, Jan 27 (Reuters) - Bitter cold and high winds from the arctic pushed wind chills to dangerous levels across the U.S. upper Midwest on Monday, forcing officials to close schools and slowing public transit and river traffic.
A winter storm system is forecast to move through the U.S. South on Tuesday, bringing snow, freezing rain and high winds as bitter cold temperatures continue in the Midwest, according to the National Weather Service.
Chicago, Minneapolis, Milwaukee and other parts of the upper Midwest are forecast to have a second consecutive day of subzero highs on Tuesday, while most of the Northeast will see highs in the single digits and teens on Tuesday and Wednesday, according to Accuweather.com.
National Weather Service meteorologist Andrew Krein blamed the weather on a surge of arctic high pressure out of Canada that has spread over the upper Midwest and central plains.
Even weather-hardy Midwesterners expressed weariness on Monday with the sub-zero cold snap, the second this month.
"I'm real sick of it," said Romik Stewart, 20, who was waiting for a bus in Milwaukee to go to his job at a fast food restaurant. "I've had enough of this already. It's too much."
The weather will force schools to close on Tuesday in New Orleans, Minneapolis, Chicago and Milwaukee, and government offices in Indianapolis, Galveston and Milwaukee County will also be closed.
Tulane University in New Orleans, University of Michigan in Ann Arbor, and The Ohio State University in Columbus have canceled classes ahead of Tuesday's storm.
Amtrak has also canceled a number of train routes in and out of Chicago on Tuesday because of the frigid weather conditions.
For much of the South, a winter storm warning will be in effect on Tuesday, including in New Orleans where winds will gust and ice and snow will accumulate on the roads, making travel hazardous, according to the National Weather Service.
Heavy snow was expected beginning on Tuesday across eastern North Carolina, while coastal South Carolina will get rare ice accumulation with some snow and temperatures will be below freezing on Tuesday and Wednesday, the National Weather Service predicts.
The frigid temperatures also were causing ice to accumulate on the Mississippi and Illinois rivers, slowing the movement of grain barges to the U.S. Gulf, according to Drew Lerner, a meteorologist at World Weather Inc.
"I'm very ready for the spring," said 18-year-old Caroline Burns, a student at Marquette University in Milwaukee, as she walked from her residence hall to class.
Nearly 900 flights have been canceled within, into and out of the United States on Monday, according to FlightAware.com, which tracks flights.
Wind gusts of up to 35 mph (56 km) knocked down power lines in the Dallas-Forth Worth area in Texas and temperatures were expected to fall into the 20s overnight from highs in the 60s and 70s over the weekend, the weather service said.
In Alaska, the roughly 4,000 residents of Valdez remained cut off to road traffic from the rest of the state Monday after weekend avalanches blocked the road to the coastal town, officials said. (Reporting by Mary Wisniewski; Additional reporting by Brendan O'Brien in Milwaukee, Julie Ingwersen in Chicago, David Bailey in Minneapolis, Kim Palmer in Cleveland, Colleen Jenkins in Winston-Salem, N.C., Harriet McLeod in Charleston, S.C., and Karen Brooks in Austin; Editing by Steve Orlofsky and Ken Wills)