Aviation Digital Data Service (ADDS)

Output produced by TAFs form (1919 UTC 23 July 2017)
found at http://www.aviationweather.gov/adds/tafs/
 
METAR text: EGLL 231850Z AUTO 25008KT 220V280 9999 NCD 18/14 Q1011 NOSIG
Conditions at: EGLL (LONDON/HEATHROW , GB) observed 1850 UTC 23 July 2017
Temperature: 18.0°C (64°F)
Dewpoint: 14.0°C (57°F) [RH = 77%]
Pressure (altimeter): 29.85 inches Hg (1011.0 mb)
Winds: from the WSW (250 degrees) at 9 MPH (8 knots; 4.2 m/s)
Visibility: 6 or more miles (10+ km)
Ceiling: at least 12,000 feet AGL
Clouds: sky clear below 12,000 feet AGL
Weather: no significant weather observed at this time

Forecast for: EGLL (LONDON/HEATHROW , GB)
Text: TAF EGLL 231653Z 2318/2424 26010KT 9999 FEW025
Forecast period: 1800 UTC 23 July 2017 to 0000 UTC 24 July 2017
Forecast type: FROM: standard forecast or significant change
Winds: from the W (260 degrees) at 12 MPH (10 knots; 5.2 m/s)
Visibility: 6 or more miles (10+ km)
Clouds: few clouds at 2500 feet AGL
Weather: no significant weather forecast for this period
Text: TEMPO 2318/2321 7000 SHRA
Forecast period: 1800 to 2100 UTC 23 July 2017
Forecast type: TEMPORARY: The following changes expected for less than half the time period
Visibility: 4 miles (7 km)
Weather: SHRA  (rain showers)
Text: PROB30
Forecast period: 1800 to 2000 UTC 23 July 2017
Forecast type: TEMPORARY: The following changes expected for less than half the time period
Visibility: 2.49 miles (4.01 km)
Weather: +SHRA  (heavy rain showers)
Text: TEMPO 2318/2320 4000 +SHRA
Forecast period: 0000 to 1800 UTC 24 July 2017
Forecast type: BECOMING: Conditions expected to become as follows by 0300 UTC 24 July 2017
Winds: from the N (350 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: -RA  (light rain)
Text: BECMG 2400/2403 35010KT -RA BKN012
Forecast period: 0100 to 0600 UTC 24 July 2017
Forecast type: TEMPORARY: The following changes expected for less than half the time period
Visibility: 4 miles (7 km)
Ceiling: 800 feet AGL
Clouds: broken clouds at 800 feet AGL
Weather: RA  (rain)
Text: PROB30
Forecast period: 1200 to 1800 UTC 24 July 2017
Forecast type: TEMPORARY: The following changes expected for less than half the time period
Ceiling: 2000 feet AGL
Clouds: broken clouds at 2000 feet AGL
Weather: no significant weather forecast for this period
Text: TEMPO 2401/2406 7000 RA BKN008
Forecast period: 1800 UTC 24 July 2017 to 0000 UTC 25 July 2017
Forecast type: BECOMING: Conditions expected to become as follows by 2100 UTC 24 July 2017
Winds: from the N (350 degrees) at 12 MPH (10 knots; 5.2 m/s)
Visibility: 6 or more miles (10+ km)
Clouds: scattered clouds at 2000 feet AGL
Weather: -RA  (light rain)