Aviation Digital Data Service (ADDS)

Output produced by TAFs form (1155 UTC 08 December 2016)
found at http://www.aviationweather.gov/adds/tafs/
 
Forecast for: EGLL (LONDON/HEATHROW , GB)
Text: TAF EGLL 081102Z 0812/0918 22010KT 9999 BKN012
Forecast period: 1200 UTC 08 December 2016 to 1800 UTC 09 December 2016
Forecast type: FROM: standard forecast or significant change
Winds: from the SW (220 degrees) at 12 MPH (10 knots; 5.2 m/s)
Visibility: 6 or more miles (10+ km)
Ceiling: 1200 feet AGL
Clouds: broken clouds at 1200 feet AGL
Weather: no significant weather forecast for this period
Text: BECMG 0812/0815 7000 BKN007
Forecast period: 1200 UTC 08 December 2016 to 1800 UTC 09 December 2016
Forecast type: BECOMING: Conditions expected to become as follows by 1500 UTC 08 December 2016
Winds: from the SW (220 degrees) at 12 MPH (10 knots; 5.2 m/s)
Visibility: 4 miles (7 km)
Ceiling: 700 feet AGL
Clouds: broken clouds at 700 feet AGL
Weather: no significant weather forecast for this period
Text: TEMPO 0814/0908 3000 -DZ BR BKN003
Forecast period: 1400 UTC 08 December 2016 to 0800 UTC 09 December 2016
Forecast type: TEMPORARY: The following changes expected for less than half the time period
Visibility: 1.86 miles (2.99 km)
Ceiling: 300 feet AGL
Clouds: broken clouds at 300 feet AGL
Weather: -DZ BR  (light drizzle, mist)
Text: PROB40
Forecast period: 0800 to 1800 UTC 09 December 2016
Forecast type: TEMPORARY: The following changes expected for less than half the time period
Ceiling: 400 feet AGL
Clouds: broken clouds at 400 feet AGL
Weather: no significant weather forecast for this period