( CNN ) -- Wildfires , tornadoes , snow , ice , flooding , all on the same day . Sure , it sounds weird . But it 's not , CNN meteorologist Judson Jones said Tuesday . `` It 's just spring , '' he said . `` Blinding snow and 40 degrees below average does not sound like spring in Denver . On the flip side , the 20 degrees above average forecast for New York City feels more like early summer , '' he said . `` But the unexpected is what we expect in spring . '' A day after bizarre weather on Monday in which emergency workers northeast of Denver responded to a wildfire , a possible tornado and a blizzard warning -- all within a 50-mile radius -- a storm pouring over the Rockies gave Denver students a rare snow day on Tuesday . It also caused the cancellation of at least 486 flights at Denver International Airport . In South Dakota , which was on the lookout for up to 11 inches of snow on Tuesday , nearly four-tenths of an inch of ice had been recorded near Sioux Falls , with more on the way , the National Weather Service reported . `` It was 65 all last week ! '' CNN iReporter Nathan Zacher said . `` Normally around 55 degrees this time of year . '' The ice was downing trees and making travel tough , he said . And while the Southeast and parts of the Northeast basked in sunny warmth , residents of the Central Plains braced for the possibility of severe storms , including tornadoes . Central Oklahoma and parts of north central Texas were under moderate threat of severe thunderstorms , including the possibility of tornadoes , through Tuesday night , Jones said . About 2.6 million people live in the path of those storms , which includes Oklahoma City and Tulsa in Oklahoma and Wichita Falls in Texas , Jones said . The primary threat from those storms will be large hail , the National Weather Service said . Half-dollar-size hail was reported in Hamilton County , Iowa , and hail covered the ground in Fullerton , Nebraska . In Denver on Tuesday , schools were closed , despite grumblings from parents online that there would be too little snow to keep kids home . In a posting on its website , the district said Monday night that it made the call because it could be too hazardous to put kids on buses in what were expected to be icy , low-visibility conditions Tuesday morning . At Denver International Airport , the staff said on Twitter that crews were continuing to clear snow and ice from runways and about half the canceled flights were commuter flights to smaller Rocky Mountain towns . Weather tracker . Monday Weather . Those actions followed a busy day in Colorado , where the storm knocked out power to about half the small town of Akron , destroyed a mobile home and damaged two other structures , at least one of which was a home , the state Division of Homeland Security and Emergency Management said . No serious injuries were reported . While it was not immediately clear if the winds in that storm were from a tornado , a tornado did briefly touch down near Bonny Lake in eastern Colorado on Monday , the National Weather Service reported . Colorado crews also worked a 2,600-acre wildfire in Sterling County . Colorado has long been in a drought , and it would n't take much to spark a fire there , Jones said . Wet , wet , wet . Inclement weather is not limited to the snow and ice . The National Weather Service said to expect `` a plethora of interesting weather conditions . '' Flood watches and warnings are in effect for most of Wisconsin on Tuesday , to be followed by freezing rain later in the week . `` Severe thunderstorms and even isolated tornadoes are possible across the central and southern Plains to the mid and lower Mississippi Valley , '' the weather service said . By Wednesday , a squall line stretching from Memphis down through Louisiana should roll eastward through the Deep South , pushing along heavy thunderstorms , hail , damaging winds and possibly short-lived tornadoes , forecasters said . It will be unseasonably warm in the Ohio Valley , Mid-Atlantic and Southeast , the weather service predicts . It 's not all bad . Most of the country will see rain for the better part of the week . That 's good news for the Plains and mountain states , which have seen extreme to exceptional drought for months . The snow in the mountain states will extend the fun for winter sport fans , according Coloradoski.com . As ski season winds down , with about half of resorts already closed , some popular slopes are expecting 1 to 5 inches of fresh powder through Wednesday . The same goes for resorts in Utah . CNN 's Michael Pearson contributed to this report .
NEW : Snow is hammering parts of Iowa and Nebraska . NEW : All flights are canceled at Omaha 's airport . An ice storm is making travel tough in South Dakota , a local reporter says .