Hoosier and ChicagoWX's favorite met was quoted by an IND met on chat yesterday in an answer to a question about anomalous warm temps recorded at LAF yesterday:
"Chad Evans tweeted this at 4:34 PM today: Just hit 87 w/ dew point of 51 here at the station! All the fields are planted @ once, so these darker, bare soils are really warm! Noticed warmest temps are over drier, black sandy-loam prairie soils today at 86-88. Wetter, brown soils 82-84. He followed up with: ...noticed Champaign, Covington to Morocco....all really warm. Heat rolling off 1000s acres of that bare, black ground!"