Aviation Digital Data Service (ADDS)

Output produced by TAFs form (0453 UTC 30 March 2017)
found at http://www.aviationweather.gov/adds/tafs/
 
METAR text: EGLL 300420Z AUTO 21006KT 9999 SCT043 12/08 Q1021 NOSIG
Conditions at: EGLL (LONDON/HEATHROW , GB) observed 0420 UTC 30 March 2017
Temperature: 12.0°C (54°F)
Dewpoint: 8.0°C (46°F) [RH = 76%]
Pressure (altimeter): 30.15 inches Hg (1021.0 mb)
Winds: from the SSW (210 degrees) at 7 MPH (6 knots; 3.1 m/s)
Visibility: 6 or more miles (10+ km)
Ceiling: at least 12,000 feet AGL
Clouds: scattered clouds at 4300 feet AGL
Weather: no significant weather observed at this time

Forecast for: EGLL (LONDON/HEATHROW , GB)
Text: TAF EGLL 292253Z 3000/3106 19008KT 9999 SCT040
Forecast period: 0000 UTC 30 March 2017 to 0600 UTC 31 March 2017
Forecast type: FROM: standard forecast or significant change
Winds: from the S (190 degrees) at 9 MPH (8 knots; 4.2 m/s)
Visibility: 6 or more miles (10+ km)
Clouds: scattered clouds at 4000 feet AGL
Weather: no significant weather forecast for this period