More than 1,400 flights have been canceled across the U.S. and 2,600 have been delayed due to the large storm system moving through the middle part of the country.
Flight-tracking service FlightAware showed that nearly half of the cancellations were at Chicago’s two main airports. Another large chunk came from Dallas-Fort Worth International Airport; several tornadoes touched down Saturday in the Dallas suburbs.
In Grand Rapids, 15 arrival flights and eight departing flights have currently been canceled at Gerald R. Ford International Airport for Monday evening. Several others are delayed.
Cities with an unusually large number of cancellations also included Houston, Denver, Detroit, Milwaukee, Kansas City, St. Louis, Oklahoma City, and Lubbock, Texas.
A typical day sees about 150 cancellations and 4,000 delays.
Heavy rain and strong winds, like forecast for parts of Missouri, Illinois and Arkansas on Monday, are often more troubling for airlines than snowfall.
The Associated Press contributed to this report