How do I get the TIGGE data? You can download the TIGGE data via one of the data portals hosted by either ECMWF or CMA, after a simple registration procedure. For further details, see the data access section of the tools page.
Why can't I download the most recent datacannot be downloaded? Because of the data policy restricting the access to the TIGGE data with a delay of 48 hours after initial time of the forecasts (http://apps.ecmwf.int/datasets/data/tigge_lam/licence/)
How can I use TIGGE if I can't read GRIB2 format data? Several tools are available to convert GRIB2 data to NETCDF, and also to use the data in either the orginal GRIB2 format or NETCDF - for more information, please see the links on the tools page.