Aviation Digital Data Service (ADDS)

Output produced by TAFs form (0956 UTC 22 September 2017)
found at http://www.aviationweather.gov/adds/tafs/
 
METAR text: KSEA 220953Z 00000KT 10SM OVC110 12/09 A3002 RMK AO2 SLP171 T01170089 $
Conditions at: KSEA (SEATTLE/METRO , WA, US) observed 0953 UTC 22 September 2017
Temperature: 11.7°C (53°F)
Dewpoint: 8.9°C (48°F) [RH = 83%]
Pressure (altimeter): 30.02 inches Hg (1016.7 mb)
[Sea-level pressure: 1017.1 mb]
Winds: calm
Visibility: 10 or more miles (16+ km)
Ceiling: 11000 feet AGL
Clouds: overcast cloud deck at 11000 feet AGL
Weather:
SOME DATA ABOVE MAY BE INACCURATE!!!
"$" is an indication the sensor requires maintenance

Forecast for: KSEA (SEATTLE/METRO , WA, US)
Text: KSEA 220901Z 2209/2312 15004KT P6SM OVC100
Forecast period: 0900 to 1700 UTC 22 September 2017
Forecast type: FROM: standard forecast or significant change
Winds: from the SSE (150 degrees) at 5 MPH (4 knots; 2.1 m/s)
Visibility: 6 or more miles (10+ km)
Ceiling: 10000 feet AGL
Clouds: overcast cloud deck at 10000 feet AGL
Weather: no significant weather forecast for this period
Text: FM221700 29004KT P6SM SCT120 SCT200
Forecast period: 1700 UTC 22 September 2017 to 1200 UTC 23 September 2017
Forecast type: FROM: standard forecast or significant change
Winds: from the WNW (290 degrees) at 5 MPH (4 knots; 2.1 m/s)
Visibility: 6 or more miles (10+ km)
Clouds: scattered clouds at 12000 feet AGL
scattered clouds at 20000 feet AGL
Weather: no significant weather forecast for this period