A cargo jet is obscured by heavy snow in Louisville, Kentucky.Luke Sharrett/Getty ImagesStorm Blair has caused travel disruption in several states.More than half of flights were canceled at Ronald Reagan Washington National Airport on Monday.94% of flights were canceled in Kansas City, Missouri, on Sunday.More than half of flights were canceled at Washington, DC's Reagan National Airport on Monday, according to data from FlightAware, as Storm Blair brought snow and ice to a large part of the country.The winter storm has triggered a state of emergency in Arkansas, Kansas, Kentucky, Missouri, Virginia, West Virginia, and parts of New Jersey.FlightAware data showed 1,339 flights within, into, or out of the US were canceled on Monday as of 6:30 a.m.