Aviation Digital Data Service (ADDS)

Output produced by TAFs form (0907 UTC 30 May 2017)
found at http://www.aviationweather.gov/adds/tafs/
 
METAR text: EGLL 300850Z AUTO 24009KT 210V280 9999 FEW015 OVC042 17/13 Q1015
Conditions at: EGLL (LONDON/HEATHROW , GB) observed 0850 UTC 30 May 2017
Temperature: 17.0°C (63°F)
Dewpoint: 13.0°C (55°F) [RH = 77%]
Pressure (altimeter): 29.97 inches Hg (1015.0 mb)
Winds: from the WSW (240 degrees) at 10 MPH (9 knots; 4.7 m/s)
Visibility: 6 or more miles (10+ km)
Ceiling: 4200 feet AGL
Clouds: few clouds at 1500 feet AGL
overcast cloud deck at 4200 feet AGL
Weather: no significant weather observed at this time

Forecast for: EGLL (LONDON/HEATHROW , GB)
Text: TAF AMD EGLL 300655Z 3006/3112 26010KT 9999 SCT030
Forecast period: 0600 to 2300 UTC 30 May 2017
Forecast type: FROM: standard forecast or significant change
Winds: from the W (260 degrees) at 12 MPH (10 knots; 5.2 m/s)
Visibility: 6 or more miles (10+ km)
Clouds: scattered clouds at 3000 feet AGL
Weather: no significant weather forecast for this period
Text: TEMPO 3006/3008 BKN012
Forecast period: 0600 to 0800 UTC 30 May 2017
Forecast type: TEMPORARY: The following changes expected for less than half the time period
Ceiling: 1200 feet AGL
Clouds: broken clouds at 1200 feet AGL
Weather: no significant weather forecast for this period
Text: BECMG 3023/3102 VRB03KT
Forecast period: 2300 UTC 30 May 2017 to 1200 UTC 31 May 2017
Forecast type: BECOMING: Conditions expected to become as follows by 0200 UTC 31 May 2017
Winds: variable direction winds at 3 MPH (3 knots; 1.6 m/s)
Visibility: 6 or more miles (10+ km)
Clouds: scattered clouds at 3000 feet AGL
Weather: no significant weather forecast for this period
Text: PROB30
Forecast period: 0200 to 0700 UTC 31 May 2017
Forecast type: TEMPORARY: The following changes expected for less than half the time period
Visibility: 5 miles (8 km)
Ceiling: 700 feet AGL
Clouds: broken clouds at 700 feet AGL
Weather: no significant weather forecast for this period