Aviation Digital Data Service (ADDS)

Output produced by METARs form (1601 UTC 21 September 2017)
found at http://www.aviationweather.gov/adds/metars/
 
METAR text: KNHK 211552Z 05006KT 10SM FEW140 28/19 A3003 RMK AO2 SLP170 T02780194 VISNO RY24 $
Conditions at: KNHK (PATUXENT RIVER , MD, US) observed 1552 UTC 21 September 2017
Temperature: 27.8°C (82°F)
Dewpoint: 19.4°C (67°F) [RH = 60%]
Pressure (altimeter): 30.03 inches Hg (1017.0 mb)
[Sea-level pressure: 1017.0 mb]
Winds: from the NE (50 degrees) at 7 MPH (6 knots; 3.1 m/s)
Visibility: 10 or more miles (16+ km)
Ceiling: at least 12,000 feet AGL
Clouds: few clouds at 14000 feet AGL
Weather:
SOME DATA ABOVE MAY BE INACCURATE!!!
"$" is an indication the sensor requires maintenance