Aviation Digital Data Service (ADDS)

Output produced by METARs form (0606 UTC 30 July 2015)
found at http://aviationweather.gov/adds/metars/
 
KDTW 300520Z 3006/3112 27006KT P6SM SKC 
     FM301500 28015G23KT P6SM FEW060 
     FM310000 26008KT P6SM SCT080