Aviation Digital Data Service (ADDS)

Output produced by TAFs form (0936 UTC 21 April 2014)
found at http://www.aviationweather.gov/adds/tafs/
 
Forecast for: EGLL (LONDON/HEATHROW , GB)
Text: TAF COR EGLL 210848Z 2108/2212 VRB03KT 6000 FEW045
Forecast period: 0800 UTC 21 April 2014 to 1200 UTC 22 April 2014
Forecast type: FROM: standard forecast or significant change
Winds: variable direction winds at 3 MPH (3 knots; 1.6 m/s)
Visibility: 4 miles (6 km)
Clouds: few clouds at 4500 feet AGL
Weather: no significant weather forecast for this period
Text: BECMG 2108/2110 9999
Forecast period: 0800 to 1400 UTC 21 April 2014
Forecast type: BECOMING: Conditions expected to become as follows by 1000 UTC 21 April 2014
Winds: variable direction winds at 3 MPH (3 knots; 1.6 m/s)
Visibility: 6 or more miles (10+ km)
Clouds: few clouds at 4500 feet AGL
Weather: no significant weather forecast for this period
Text: BECMG 2114/2117 03010KT
Forecast period: 1400 to 2100 UTC 21 April 2014
Forecast type: BECOMING: Conditions expected to become as follows by 1700 UTC 21 April 2014
Winds: from the NNE (30 degrees) at 12 MPH (10 knots; 5.2 m/s)
Visibility: 6 or more miles (10+ km)
Clouds: few clouds at 4500 feet AGL
Weather: no significant weather forecast for this period
Text: PROB30
Forecast period: 1400 to 2100 UTC 21 April 2014
Forecast type: TEMPORARY: The following changes expected for less than half the time period
Visibility: 1.86 miles (2.99 km)
Ceiling: 1400 feet AGL
Clouds: broken clouds at 1400 feet AGL
Weather: +TSRA SHGS  (heavy rain associated with thunderstorm(s), small hail or graupel showers)
Text: TEMPO 2114/2121 3000 +TSRA SHGS BKN014CB
Forecast period: 2100 UTC 21 April 2014 to 0200 UTC 22 April 2014
Forecast type: BECOMING: Conditions expected to become as follows by 0000 UTC 22 April 2014
Winds: from the NNE (30 degrees) at 12 MPH (10 knots; 5.2 m/s)
Visibility: 6 or more miles (10+ km)
Ceiling: 1100 feet AGL
Clouds: broken clouds at 1100 feet AGL
Weather: no significant weather forecast for this period
Text: BECMG 2121/2124 BKN011
Forecast period: 2100 UTC 21 April 2014 to 1200 UTC 22 April 2014
Forecast type: TEMPORARY: The following changes expected for less than half the time period
Visibility: 4 miles (7 km)
Ceiling: 700 feet AGL
Clouds: broken clouds at 700 feet AGL
Weather: -RA  (light rain)
Text: TEMPO 2121/2212 7000 -RA BKN007
Forecast period: 0100 to 0700 UTC 22 April 2014
Forecast type: PROBABLE: 40 percent likelihood of the following during this time
Visibility: 2.49 miles (4.01 km)
Ceiling: 400 feet AGL
Clouds: broken clouds at 400 feet AGL
Weather: RA DZ BR  (rain, drizzle, mist)
Text: PROB40 2201/2207 4000 RADZ BR BKN004
Forecast period: 0200 to 1200 UTC 22 April 2014
Forecast type: BECOMING: Conditions expected to become as follows by 0500 UTC 22 April 2014
Winds: variable direction winds at 3 MPH (3 knots; 1.6 m/s)
Visibility: 6 or more miles (10+ km)
Ceiling: 1100 feet AGL
Clouds: broken clouds at 1100 feet AGL
Weather: no significant weather forecast for this period