This dataset contains winter (October-March) extra-tropical cyclone tracks generated by TRACK (Hodges 1994, 1995, 1999) that pass through a Western European domain from NCEP-CFS (1979-2010). The tracks were filtered to retain those that travelled 1000km and lasted 2 days. Fields referenced to the tracks are: mean sea-level pressure (min within 5 degrees), 925hPa windspeed (max within 6 degrees), precipitation (max within 5 degrees), 700hPa vertical velocity (min within 5 degrees), 925hPa land-windspeed (max within 6 degrees), precipitation (area average over 5 degrees).

This data was collected as part of Robust Spatial Projections for the Real World (Real Projections) NERC (Natural Environment Research Council) NE/N018486/1.

For files with the naming convention:

[Dataset]_tr_trs_VOR850_[yearstart][yearend]_pos.addmslp_addspeed_addprecip_addomega_addlandwinds_addavgprecip.new_1000km2dayfiltered[_RealProjregion2filtered_maxlandwindsinregion].txt

The track files contain a 5 line header. The information in the body of the file gives:

1. Date and time (YYYYMMDDHH).

2. Longitude of relative vorticity maximum (degrees).

3. Latitude of relative vorticity maximum (degrees).

4. Relative vorticty at T42 resolution (x10-5 s-1).

5. Longitude of associated MSLP minimum (degrees).

6. Latitude of associated MSLP minimum (degrees).

7. MSLP minimum (hPa).

8. Longitude of 925hPa windspeed maximum within a 6 degree radius of vorticity maximum (degrees).

9. Latitude of 925hPa windspeed maximum within a 6 degree radius of vorticity maximum (degrees).

10. 925hPa windspeed maximum within a 6 degree radius of vorticity maximum (ms-1).

11. Longitude of precipitation maximum within a 5 degree radius of vorticity maximum (degrees)

12. Latitude of precipitation maximum within a 5 degree radius of vorticity maximum (degrees)

13. Precipitation maximum within a 5 degree radius of vorticity maximum (mmhr-1)

14. Longitude of 700hPa minimum vertical velocity within a 5 degree radius of vorticity maximum (degrees)

15. Latitude of 700hPa minimum vertical velocity within a 5 degree radius of vorticity maximum (degrees)

16. 700hPa vertical velocity minimum within a 5 degree radius of vorticity maximum (ms-1)

17. Longitude of 925hPa windspeed maximum over European and Scandinavian land within a 6 degree radius of vorticity maximum (degrees).

18. Latitude of 925hPa windspeed maximum over European and Scandinavian land within a 6 degree radius of vorticity maximum (degrees).

19. 925hPa windspeed maximum over European and Scandinavian land within a 6 degree radius of vorticity maximum (ms-1).

20. Precipitation area averaged over a 5 degree radius of vorticity maximum (mmhr-1)

The [_RealProjregion2filtered_maxlandwindsinregion] refers to data that has been filtered to those storms that have their maximum 925hPa windspeed over land in the region. The add[field] refers to which field, and the order, in which the meteorological fields have been referenced to the vorticity centres.

For files with the naming convention:

[Dataset]_tr_trs_VOR850_[yearstart][yearend]_pos.addmslp_addspeed_addprecip_addomega_addlandwinds_addavgprecip_addmax5cmorph_addavg5cmorph.new_1000km2dayfiltered_RealProjregion2filtered_maxlandwindsinregion.txt

(i.e. these include two additional fields for a smaller temporal range)

The same track information as above in included, plus:

21. Longitude of CMORPH precipitation maximum within a 5 degree radius of vorticity maximum (degrees)

22. Latitude of CMORPH precipitation maximum within a 5 degree radius of vorticity maximum (degrees)

23. CMORPH precipitation maximum within a 5 degree radius of vorticity maximum (mmhr-1)

24. CMORPH precipitation area averaged over a 5 degree radius of vorticity maximum (mmhr-1)