Extra-Tropical Cyclones Automated Tracking Analyses & Forecasts North America (1000 hPa | 500 hPa | 1000+500 hPa) - Europe (1000 hPa | 500 hPa | 1000+500 hPa) 1000 and 500 hPa vorticity centres composite Short and medium-range forecasts:   GEM-GLB GFS  UKMET 00z : 000-120h 120-240h 00z : 000-120h 120-240h 00z : 00-48h 12z : 000-120h 120-240h 12z : 000-120h 120-240h 12z : 00-48h