good

1
NH
SH
good
useful
Last month
GFS tied for 2nd
GFS 3rd
Last 3 months
Ensemble mean 1/2 day more of skill
Ensemble mean 1 day more of skill
2
Ensemble mean day 8 forecasts usually useful,
occasionally good
3
Published 
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difficult for outsiders to understand Israels
complicated political situation. Palestinian
university students living in the West Bank
experience a different political, economic and
cultural reality than Israeli citizens do. But
students from both sides of
Conflict resolution Multi-faceted program and
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divide Ynetnews
Ensemble mean occasionally has useful skill in
forecasting Days8-14 mean
4
Medley clearly Superior to any one model
CONUS precip June 2007
GFS little bias Except for large amounts
5
Warm bias in GFS
6
June 2007
June 2006
Pressure
Forecast Length
7
USA 850 hPa
Diurnal cycle
8
USA 700 hPa
9
Europe
10
Asia
11
Forecast Length
N
Latitude
12
40N
850 hPa
Forecast Length
Longitude
13
Longitude-time
850 T 5-day error 35N
Verification day
Warm bias episodic
Longitude
14
GFS-ECMWF 850 hPA June 2007
15
1 day
GFS
850 hPa T errors
ECMWF
3 day
16
5day
ECMWF
GFS
850 hPa T errors
10 day
Note similar patterns at day 10 for ECMWF, GFS