/CCCC1/TAF/CCCC2/product.xml en ucs2 World Meteorological Organisation originator Observing Systems +41 22 730 8111 +41 22 730 8181

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http://www.wmo.int 2004-02-11 WMO19115 http://www.wmo.int/web/www/metadata/WMO-core-metadata-toc.html Version 0.19 WMO Publication 9, Volume A. Observing stations. http://www.wmo.int/web/www/ois/volume-a/vola-home.htm World Meteorological Organisation originator Observing Systems +41 22 730 8111 +41 22 730 8181

7 bis Avenue de la Paix, CP2300 - 1200 Geneva 2 Switzerland ipa@wmo.int

http://www.wmo.int This system of observing stations at aerodromes and airports is managed by member states of the Interbnational Civil Aviation Organisation under formal rules and protocols An individual TAF aerodrome forecast for aviation operations and international exchange TTAAii CCCC1 TAF CCCC2 WMO GTS/ICAO AFTN AHL code type and station identifier Organistation represented by the ICAO code contained in position of CCCC1 distributor A TAF "Terminal Aerodrome Forecast" is a WMO and ICAO Code form representing a forecast over an explicit period of a set of weather elements, created at a specific time for a specific airport location, authorised and managed by the ICAO aviation authority, and measured according to declared ICAO and WMO standards Organistation represented by the ICAO code contained in position of CCCC1 pointOfContact continual WMO Volume 306 Manual on codes http://www.wmo.int/web/www/DPS/NewCodesTables/WMO306vol-I-1PartA.pdf ICAO manual 3 irregularPoints 1 en ucs2 climatologyMeteorologyAtmosphere TAF aviation weather forecast temperature dew point precipitation amount visibility cloud amount type height weather runway colour state 2004-01-28 creationDate forecast for aviation weather conditions at an airport, usually gathered in a bulletin collection Name and position of the specific station represented by the code letters CCCC2 2000-01-01T00:00:00 2004-01-01T03:00:00 2000-01-01T12:00:00 TAF FM 51-XII TAF Aerodrome forecast TAF ICAO id 4 letter code defined by ICAO identifying the collection and disseminating centre day  day of report issue hour hour of report issue minute minute of report issue forecast begin day day at which the forecast period starts forecast begin hour hour at which the forecast period starts forecast end hour hour at which the forecast period ends wind direction wind speed maximum gust general weather id significant weather intensity id sig weather description id sig weather phenomenon id cloud amount id cloud type id cloud base height deep convective cloud amount id deep convective cloud type id deep convective cloud base height minimum visibility vertical visibility forecast air temperature hour air temperature icing level icing layer thickness airframe icing id turbulence frequency id turbulence base height turbulence top height turbulence amount id present weather id forecast change id FM or TEMPO or BECMG representing temporary or eventual changes of weather forecast change begin hour hour at which the change period starts (within the forecast) forecast change end hour hour at which the change period ends 9within the forecast) forecast probablility change wind direction change wind speed change maximum gust change general weather id change sig weather intensity id change sig weather description id change sig weather phenomenon id change cloud amount id change cloud type id change cloud base height change deep conv cloud amount id change deep conv cloud type id change deep conv cloud base ht change mimimum visibility SYNOP CBS-Ext.(02). Approved by EC-LV, May 2003. Manual on Codes ( WMO No. 306) 1 onLine Manually generated forecast, no correction, validation or verification as of this report forecast for an airport site, collected and disseminated by CCCC disseminating authority Generated by human analysis and assimilation of current weather situation, the trends in the weather, and aided by various numerical models and heuristic forecasting techniques