Aviation Digital Data Service (ADDS)

Output produced by METARs form (1333 UTC 29 September 2016)
found at http://aviationweather.gov/adds/metars/
 
KIAD 291130Z 2912/3018 10011G20KT P6SM -RA OVC008 
     FM291800 09012G19KT 3SM SHRA OVC008 
     FM301200 06012KT 5SM -SHRA OVC008