Aviation Digital Data Service (ADDS)

Output produced by TAFs form (0103 UTC 22 September 2017)
found at http://www.aviationweather.gov/adds/tafs/
 
METAR text: EGLL 220050Z AUTO 28002KT 7000 NCD 09/08 Q1020 TEMPO 3000 BR
Conditions at: EGLL (LONDON/HEATHROW , GB) observed 0050 UTC 22 September 2017
Temperature: 9.0°C (48°F)
Dewpoint: 8.0°C (46°F) [RH = 93%]
Pressure (altimeter): 30.12 inches Hg (1020.0 mb)
Winds: from the W (280 degrees) at 2 MPH (2 knots; 1.0 m/s)
Visibility: 4 miles (7 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 212300Z 2200/2306 25004KT CAVOK
Forecast period: 0000 UTC 22 September 2017 to 0600 UTC 23 September 2017
Forecast type: FROM: standard forecast or significant change
Winds: from the WSW (250 degrees) at 5 MPH (4 knots; 2.1 m/s)
Visibility: 6 or more miles (10+ km)
Clouds: not forecast
Weather: NSW  (no significant weather)
Text: BECMG 2200/2203 6000
Forecast period: 0000 to 0800 UTC 22 September 2017
Forecast type: BECOMING: Conditions expected to become as follows by 0300 UTC 22 September 2017
Winds: from the WSW (250 degrees) at 5 MPH (4 knots; 2.1 m/s)
Visibility: 4 miles (6 km)
Weather: NSW  (no significant weather)
Text: TEMPO 2202/2209 2000 BR MIFG
Forecast period: 0200 to 0900 UTC 22 September 2017
Forecast type: TEMPORARY: The following changes expected for less than half the time period
Visibility: 1.24 miles (2.00 km)
Weather: BR MIFG  (mist, shallow fog)
Text: PROB30
Forecast period: 0300 to 0800 UTC 22 September 2017
Forecast type: TEMPORARY: The following changes expected for less than half the time period
Visibility: 0.19 miles (0.31 km)
Weather: FG  (fog)
Text: TEMPO 2203/2208 0300 FG VV///
Forecast period: 0800 to 1800 UTC 22 September 2017
Forecast type: BECOMING: Conditions expected to become as follows by 1100 UTC 22 September 2017
Winds: from the WSW (250 degrees) at 5 MPH (4 knots; 2.1 m/s)
Visibility: 6 or more miles (10+ km)
Weather: NSW  (no significant weather)
Text: BECMG 2208/2211 CAVOK
Forecast period: 1800 UTC 22 September 2017 to 0600 UTC 23 September 2017
Forecast type: BECOMING: Conditions expected to become as follows by 2100 UTC 22 September 2017
Winds: from the WSW (250 degrees) at 5 MPH (4 knots; 2.1 m/s)
Visibility: 6 or more miles (10+ km)
Ceiling: 4500 feet AGL
Clouds: broken clouds at 4500 feet AGL
Weather: NSW  (no significant weather)
Text: BECMG 2218/2221 BKN045
Forecast period: 2300 UTC 22 September 2017 to 0500 UTC 23 September 2017
Forecast type: TEMPORARY: The following changes expected for less than half the time period
Visibility: 5 miles (8 km)
Ceiling: 1400 feet AGL
Clouds: broken clouds at 1400 feet AGL
Weather: -RA  (light rain)