Aviation Digital Data Service (ADDS)

Output produced by TAFs form (1153 UTC 27 May 2017)
found at http://www.aviationweather.gov/adds/tafs/
 
METAR text: KSEA 271053Z 00000KT 10SM CLR 16/09 A3005 RMK AO2 SLP180 T01560089
Conditions at: KSEA (SEATTLE/METRO , WA, US) observed 1053 UTC 27 May 2017
Temperature: 15.6°C (60°F)
Dewpoint: 8.9°C (48°F) [RH = 64%]
Pressure (altimeter): 30.05 inches Hg (1017.7 mb)
[Sea-level pressure: 1018.0 mb]
Winds: calm
Visibility: 10 or more miles (16+ 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: KSEA (SEATTLE/METRO , WA, US)
Text: KSEA 271122Z 2712/2818 VRB03KT P6SM SKC
Forecast period: 1200 to 1900 UTC 27 May 2017
Forecast type: FROM: standard forecast or significant change
Winds: variable direction winds at 3 MPH (3 knots; 1.6 m/s)
Visibility: 6 or more miles (10+ km)
Clouds: clear skies
Weather: no significant weather forecast for this period
Text: FM271900 31006KT P6SM SKC
Forecast period: 1900 UTC 27 May 2017 to 0300 UTC 28 May 2017
Forecast type: FROM: standard forecast or significant change
Winds: from the NW (310 degrees) at 7 MPH (6 knots; 3.1 m/s)
Visibility: 6 or more miles (10+ km)
Clouds: clear skies
Weather: no significant weather forecast for this period
Text: FM280300 02005KT P6SM SKC
Forecast period: 0300 to 1800 UTC 28 May 2017
Forecast type: FROM: standard forecast or significant change
Winds: from the NNE (20 degrees) at 6 MPH (5 knots; 2.6 m/s)
Visibility: 6 or more miles (10+ km)
Clouds: clear skies
Weather: no significant weather forecast for this period