Aviation Digital Data Service (ADDS)

Output produced by TAFs form (0418 UTC 29 January 2015)
found at http://www.aviationweather.gov/adds/tafs/
 
Forecast for: EGLL (LONDON/HEATHROW , GB)
Text: TAF EGLL 282303Z 2900/3006 25012KT 9999 FEW030
Forecast period: 0000 UTC 29 January 2015 to 0600 UTC 30 January 2015
Forecast type: FROM: standard forecast or significant change
Winds: from the WSW (250 degrees) at 14 MPH (12 knots; 6.2 m/s)
Visibility: 6 or more miles (10+ km)
Clouds: few clouds at 3000 feet AGL
Weather: no significant weather forecast for this period
Text: PROB30
Forecast period: 0000 to 1000 UTC 29 January 2015
Forecast type: TEMPORARY: The following changes expected for less than half the time period
Winds: from the W (270 degrees) at 17 MPH (15 knots; 7.8 m/s)
gusting to 29 MPH (25 knots; 13.0 m/s)
Visibility: 3 miles (5 km)
Ceiling: 1400 feet AGL
Clouds: broken clouds at 1400 feet AGL
Weather: -SHSN  (light snow showers)
Text: TEMPO 2900/2910 27015G25KT 5000 -SHSN BKN014
Forecast period: 1000 to 1500 UTC 29 January 2015
Forecast type: TEMPORARY: The following changes expected for less than half the time period
Winds: from the W (270 degrees) at 21 MPH (18 knots; 9.4 m/s)
gusting to 34 MPH (30 knots; 15.6 m/s)
Visibility: 2.49 miles (4.01 km)
Ceiling: 1400 feet AGL
Clouds: broken clouds at 1400 feet AGL
Weather: SHGS  (small hail or graupel showers)
Text: PROB40
Forecast period: 1500 to 1800 UTC 29 January 2015
Forecast type: TEMPORARY: The following changes expected for less than half the time period
Winds: from the W (270 degrees) at 18 MPH (16 knots; 8.3 m/s)
gusting to 31 MPH (27 knots; 14.0 m/s)
Visibility: 2.17 miles (3.49 km)
Ceiling: 1400 feet AGL
Clouds: broken clouds at 1400 feet AGL
Weather: SHRA SHSN  (rain showers, snow showers)