A Comparison of GFS Analyses and
Forecasts to Other Centers
July 2008
Height
500 hPa
12 hour errors
1 day errors
3 day errors
Time-Mean Differences between Analyses
RMS
12 hour errors
1 day errors
3 day errors
Difference in analyses
RMS Error
Zonal
mean-12h
Zonal
mean-1day
Zonal
mean-3day
40-60N-12
hours
40-60N-1day
40-60N-3day
12hour
Differences in 12 hour RMS errors
1 day
Differences in 1 day RMS errors
3 day
Differences in 3 day RMS errors
RMS Difference-Analyses
Zonal
mean
Zonal
mean-ocean
40-50N
Regional
Wind Magnitude
Zonal means
Analyses
12 hour errors
1 day errors
3 day errors
Time-Mean Differences between Analyses
Time-Mean Differences between 12 hour forecasts
Time-Mean Differences between 1-day forecasts
Time-Mean Differences between 3-day forecasts
30-40N
Analyses
12 hour errors
1 day errors
3 day errors
Time-Mean Differences between Analyses
Time-Mean Differences between 12 hour forecasts
Time-Mean Differences between 1-day forecasts
Time-Mean Differences between 3-day forecasts
Equator
Analyses
12 hour errors
1 day errors
3 day errors
Time-Mean Differences between Analyses
Time-Mean Differences between 12 hour forecasts
Time-Mean Differences between 1-day forecasts
Time-Mean Differences between 3-day forecasts
200 hPa
30-40N
12 hr
30-40N
3 dy
Analyses
12 hour errors
1 day errors
3 day errors
Time-Mean Differences between Analyses
Time-Mean Differences between 12 hour forecasts
Time-Mean Differences between 1-day forecasts
Time-Mean Differences between 3-day forecasts
850 hPa
Analyses
12 hour errors
1 day errors
3 day errors
Time-Mean Differences between Analyses
Time-Mean Differences between 12 hour forecasts
Time-Mean Differences between 1-day forecasts
Time-Mean Differences between 3-day forecasts
Average of daily RMS differences in winds between centers
Zonal Mean
Equator
200 hPa
500 hPa
850 hPa
RMS Wind Error
Zonal means
12 hour errors
1 day errors
3 day errors
Time-Mean Differences between 12 hour forecasts
Time-Mean Differences between 1-day forecasts
Time-Mean Differences between 3-day forecasts
20S-20N
12
hour errors
1
day errors
3
day errors
Time-Mean
Differences between 12 hour forecasts
Time-Mean
Differences between 1-day forecasts
Time-Mean
Differences between 3-day forecasts
200 hPa
12 hour errors
1 day errors
3 day errors
Time-Mean
Differences between 12 hour forecasts
Time-Mean
Differences between 1-day forecasts
Time-Mean
Differences between 3-day forecasts
500 hPa
12 hour
errors
1 day
errors
3 day
errors
Time-Mean
Differences between 12 hour forecasts
Time-Mean
Differences between 1-day forecasts
Time-Mean
Differences between 3-day forecasts
850 hPa
12 hour errors
1 day errors
3 day errors
Time-Mean
Differences between 12 hour forecasts
Time-Mean
Differences between 1-day forecasts
Time-Mean
Differences between 3-day forecasts
Normalized RMS Wind Error
(Normalized by
square root of transient eddy kinetic energy in forecasts)
Zonal means
12 hour errors
1 day errors
3 day errors
Time-Mean Differences between 12 hour forecasts
Time-Mean Differences between 1-day
forecasts
Time-Mean Differences between 3-day
forecasts
20S-20N
12 hour errors
1 day errors
3 day errors
Time-Mean Differences between 12 hour
forecasts
Time-Mean Differences between 1-day
forecasts
Time-Mean Differences between 3-day
forecasts
200 hPa
12 hour
errors
1 day
errors
3 day
errors
Time-Mean
Differences between 12 hour forecasts
Time-Mean
Differences between 1-day forecasts
Time-Mean
Differences between 3-day forecasts
500 hPa
12 hour
errors
1 day
errors
3 day
errors
Time-Mean
Differences between 12 hour forecasts
Time-Mean
Differences between 1-day forecasts
Time-Mean
Differences between 3-day forecasts
850 hPa
12 hour
errors
1 day
errors
3 day
errors
Time-Mean
Differences between 12 hour forecasts
Time-Mean
Differences between 1-day forecasts
Time-Mean
Differences between 3-day forecasts
Wind
Western Hemisphere
200
500
850
Transient
eddy kinetic energy
Zonal
Mean
Zonal
Mean 12 Hour Errors
Zonal
Mean 1-Day Errors
Zonal
Mean 3-Day Errors
Zonal
Mean Differences
20S-20N
Differences
