KDTW 211727Z 2118/2224 05011KT P6SM BKN035 
  FM212000 04010KT P6SM SCT040 
  FM220100 07005KT P6SM SKC 
  FM220800 VRB03KT 3SM BR SCT015 
  FM221400 04005KT P6SM FEW040 SCT250