A Comparison of GFS Analyses and Forecasts to Other Centers

 

May 2004

 

Height

 

500 hPa

 

1 day errors

 

Can

EC

GFS

UK

 

Time-Mean Differences between Analyses

 

GFS-Can

GFS-EC

GFS-UK

Can-UK

EC-Can

EC-UK

 

RMS

 

1 day errors

 

Can

EC

GFS

UK

 

Difference in analyses

 

GFS-Can

GFS-EC

GFS-UK

Can-UK

EC-Can

EC-UK

 

RMS Error

 

Zonal mean

 

40-60N

 

1 day

 

Can

EC

GFS

UK

 

Differences in 1 day RMS errors

 

GFS-Can

GFS-EC

GFS-UK

 

RMS Difference-Analyses

 

Zonal mean

 

Zonal mean-ocean

 

40-50N

 

Regional

 

GFS-Can

GFS-EC

GFS-UK

Can-UK

EC-Can

EC-UK

 

Wind Magnitude

 

Zonal means

 

Analyses

 

Can

EC

GFS

UK

 

1 day errors

 

Can

EC

GFS

UK

 

Time-Mean Differences between Analyses

 

GFS-Can

GFS-EC

GFS-UK

Can-UK

Can-EC

EC-UK

 

Time-Mean Differences between 1-day forecasts

 

GFS-Can

GFS-EC

GFS-UK

Can-UK

Can-EC

EC-UK

 

30-40N

 

Analyses

 

Can

EC

GFS

UK

 

1 day errors

 

Can

EC

GFS

UK

 

Time-Mean Differences between Analyses

 

GFS-Can

GFS-EC

GFS-UK

Can-UK

Can-EC

EC-UK

 

Time-Mean Differences between 1-day forecasts

 

GFS-Can

GFS-EC

GFS-UK

Can-UK

Can-EC

EC-UK

 

Equator

 

Analyses

 

Can

EC

GFS

UK

 

1 day errors

 

Can

EC

GFS

UK

 

Time-Mean Differences between Analyses

 

GFS-Can

GFS-EC

GFS-UK

Can-UK

Can-EC

EC-UK

 

Time-Mean Differences between 1-day forecasts

 

GFS-Can

GFS-EC

GFS-UK

Can-UK

Can-EC

EC-UK

 

200 hPa

 

30-40N

 

Analyses

 

Can

EC

GFS

UK

 

1 day errors

 

Can

EC

GFS

UK

 

Time-Mean Differences between Analyses

 

GFS-Can

GFS-EC

GFS-UK

Can-UK

Can-EC

EC-UK

 

Time-Mean Differences between 1-day forecasts

 

GFS-Can

GFS-EC

GFS-UK

Can-UK

Can-EC

EC-UK

 

850 hPa

 

Analyses

 

Can

EC

GFS

UK

 

1 day errors

 

Can

EC

GFS

UK

 

Time-Mean Differences between Analyses

 

GFS-Can

GFS-EC

GFS-UK

Can-UK

Can-EC

EC-UK

 

Time-Mean Differences between 1-day forecasts

 

GFS-Can

GFS-EC

GFS-UK

Can-UK

Can-EC

EC-UK

 

RMS Wind Error

 

Zonal means

 

1 day errors

 

Can

EC

GFS

UK

 

200 hPa

850 hPa

 

Time-Mean Differences between 1-day forecasts

 

GFS-Can

GFS-EC

GFS-UK

Can-UK

Can-EC

EC-UK

 

20S-20N

 

1 day errors

 

Can

EC

GFS

UK

 

Time-Mean Differences between 1-day forecasts

 

GFS-Can

GFS-EC

GFS-UK

Can-UK

Can-EC

 

 

200 hPa

 

1 day errors

 

Can

EC

GFS

UK

 

Time-Mean Differences between 1-day forecasts

 

GFS-Can

GFS-EC

GFS-UK

Can-UK

Can-EC

EC-UK

 

850 hPa

 

1 day errors

 

Can

EC

GFS

UK

 

Time-Mean Differences between 1-day forecasts

 

GFS-Can

GFS-EC

GFS-UK

Can-UK

Can-EC

EC-UK