Aviation Digital Data Service (ADDS)

Output produced by TAFs form (2044 UTC 24 June 2017)
found at http://www.aviationweather.gov/adds/tafs/
 
Forecast for: EGLL (LONDON/HEATHROW , GB)
Text: TAF EGLL 241655Z 2418/2524 25012KT 9999 SCT030
Forecast period: 1800 UTC 24 June 2017 to 0000 UTC 26 June 2017
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: scattered clouds at 3000 feet AGL
Weather: no significant weather forecast for this period
Text: PROB30
Forecast period: 1800 to 2100 UTC 24 June 2017
Forecast type: TEMPORARY: The following changes expected for less than half the time period
Visibility: 5 miles (8 km)
Weather: -SHRA  (light rain showers)
Text: TEMPO 2418/2421 8000 -SHRA
Forecast period: 0700 to 1100 UTC 25 June 2017
Forecast type: TEMPORARY: The following changes expected for less than half the time period
Visibility: 4 miles (6 km)
Ceiling: 1400 feet AGL
Clouds: broken clouds at 1400 feet AGL
Weather: -RA -DZ  (light rain, light drizzle)
Text: PROB40
Forecast period: 1200 to 1600 UTC 25 June 2017
Forecast type: TEMPORARY: The following changes expected for less than half the time period
Winds: from the WSW (250 degrees) at 17 MPH (15 knots; 7.8 m/s)
gusting to 29 MPH (25 knots; 13.0 m/s)
Weather: no significant weather forecast for this period