Aviation Digital Data Service (ADDS)

Output produced by TAFs form (0656 UTC 27 March 2015)
found at http://www.aviationweather.gov/adds/tafs/
 
Forecast for: EGLL (LONDON/HEATHROW , GB)
Text: TAF EGLL 270457Z 2706/2812 27005KT 9999 FEW035
Forecast period: 0600 UTC 27 March 2015 to 0000 UTC 28 March 2015
Forecast type: FROM: standard forecast or significant change
Winds: from the W (270 degrees) at 6 MPH (5 knots; 2.6 m/s)
Visibility: 6 or more miles (10+ km)
Clouds: few clouds at 3500 feet AGL
Weather: no significant weather forecast for this period
Text: BECMG 2800/2803 BKN012
Forecast period: 0000 to 0800 UTC 28 March 2015
Forecast type: BECOMING: Conditions expected to become as follows by 0300 UTC 28 March 2015
Winds: from the W (270 degrees) at 6 MPH (5 knots; 2.6 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: TEMPO 2803/2808 4000 -RADZ SCT005 BKN008
Forecast period: 0300 to 0800 UTC 28 March 2015
Forecast type: TEMPORARY: The following changes expected for less than half the time period
Visibility: 2.49 miles (4.01 km)
Ceiling: 800 feet AGL
Clouds: scattered clouds at 500 feet AGL
broken clouds at 800 feet AGL
Weather: -RA -DZ  (light rain, light drizzle)
Text: BECMG 2808/2810 24015G25KT SCT020
Forecast period: 0800 to 1200 UTC 28 March 2015
Forecast type: BECOMING: Conditions expected to become as follows by 1000 UTC 28 March 2015
Winds: from the WSW (240 degrees) at 17 MPH (15 knots; 7.8 m/s)
gusting to 29 MPH (25 knots; 13.0 m/s)
Visibility: 6 or more miles (10+ km)
Clouds: scattered clouds at 2000 feet AGL
Weather: no significant weather forecast for this period
Text: PROB30
Forecast period: 1000 to 1200 UTC 28 March 2015
Forecast type: TEMPORARY: The following changes expected for less than half the time period
Visibility: 4 miles (7 km)
Ceiling: 1400 feet AGL
Clouds: broken clouds at 1400 feet AGL
Weather: RA  (rain)