Aviation Digital Data Service (ADDS)

Output produced by METARs form (0557 UTC 04 May 2015)
found at http://aviationweather.gov/adds/metars/
 
KIAH 040520Z 0406/0512 16004KT P6SM FEW250 
     FM041500 12011KT P6SM SCT035 SCT250 
     FM041700 16012KT P6SM BKN040 BKN250 
     FM042100 12012G19KT P6SM FEW050 SCT250 
     FM050200 12010KT P6SM SCT030 SCT250 
     FM051000 13005KT P6SM VCSH SCT025