ECMWF Council at its 96th session in June 2020, agreed to make available Tropical Cyclone tracks (TC tracks) from the 06/18 UTC forecast cycles as WMO essential products.
While ECMWF is evaluating the impact of these tracks on the corresponding cycles, test data has been made available for download.
Access to test data
TC tracks test files are available for download in BUFR4 format from:
Test data files are available in real-time at the corresponding sub-directories:
Notice: The number of tracks identified in the 06/18 cycles is lower due to the shorter forecast range available in these cycles (up to step 90 for HRES and 144 for ENS)
Updates to the BUFR headers
With the introduction of the TC tracks from the 06/18 UTC forecast cycles, an inconsistency in the encoding of the BUFR headers has been corrected. The ensembleForecastType key (BUFR descriptor 001092) now contains the correct information for the different member forecasts (key ensembleMemberNumber, BUFR descriptor 001091), including situations where only one member is present, as described in the table: