Aviation Digital Data Service (ADDS)

Output produced by METARs form (0509 UTC 18 February 2018)
found at http://aviationweather.gov/adds/metars/
 
KIAD 180406Z 1804/1906 VRB03KT 1SM BR OVC005 
     TEMPO 1804/1807 1/2SM FG OVC002 
     FM180700 27004KT 3SM BR BKN140 
     FM180900 30005KT P6SM SCT140 
     FM182100 24004KT P6SM FEW250 
     FM182300 16005KT P6SM FEW250