A cow stands in a feedlot amid falling snow near Grimes, Iowa. (Image: AP Photo/Charlie Neibergall)

The calendar has flipped to May, but we can't remove the "S" word (snow) from our vocabulary just yet. Winter Storm Achilles is taking aim at cities like Denver and Cheyenne, Wyo., as the front associated with the storm dives south. Here are photos and social media posts from residents who got a chilly, white greeting this first morning of May.