Hi Backtrack, They are connected to GFS which has 4 runs each day, 00, 06, 12 and 18. These start coming out in this order: 00z - 4am 06z - 10am 12z - 4pm 18z - 10pm Each run has slightly different data attached to them, the other Forecasting systems that are good to follow: ECMWF - European Forecasting model UKMO - Met Office forecasting model GEM - I think is the Canadian forecasting model These can all be found here @ Netweather or here if you like German http://www.wetterzentrale.de/topkarten/fsenseur.html Hope that helps! I'm not going to get excited yet until the major models are consistent @ 96hours...even then I'll be hiding behind the sofa!