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meteoastur escribió:Queria saber como conseguir meteogramas de años anteriores en alguna pagina.
Vigo de Sanabria escribió:La verdad me gustaria encontrar toda la informacion de los datos con los que opera el Gfs, siempre he tenido duda con eso, si alguien sabe de alguna pagina con informacion en detalle de esto lo agradeceria, una que tenga un manual de instrucciones del modelo
Consideraciones sobre el paso de dos a cuatro salidas en el AVN (1997)
http://www.weather.gov/om/tpb/442body.htm escribió:
"4. IMPLEMENTATION DETAILS
The off-time AVN forecasts are identical to the on-time forecasts except for their release time. Like the on-time forecasts, the initial processing time (or "dump time") is 2:45 hours past the initial hour in order to wait for late-arriving observations. That is, the 06Z run is initiated at 0845Z and the 18Z run is initiated at 2045Z. The 24-hour forecast should be available sometime after 3:45 hours past the initial hour. Both the on-time and off-time forecasts will be extended to 78 hours for use in hurricane forecasting.
5. CONCLUSIONS
The 06Z (and 18Z) off-time forecasts are generally 4 to 6 hours more skillful for the same valid time compared to the previous 00Z (and 12Z) on-time forecasts that were distributed 6 hours earlier. That is, the implementation of the four-times-per-day AVN forecasts will give the model guidance users 4 to 6 hours more skill in the two 6-hour periods of the day when the most recent AVN forecast available is an off-time forecast (but of course will give no change in skill when the youngest forecast is an on-time forecast). Therefore, the operational implementation of the off-time global AVN forecasts increases the daily mean skill of the total forecast products by 2 to 3 hours."
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