date     leadtime location  lat   lon   altitude  obs   fcst e0 e1 e2 ensemble_mean
20120101 0        3         50    10    12          3     6  3 4 5 0
20120101 6        3         50    10    12          5     7  4 4 4 0
20120101 12       3         50    10    12          6     7  4 6 11 0
20120102 0        3         50    10    12          5     6  2 2 2 0
20120102 6        3         50    10    12          9     8  1 -1 12 0
20120102 12       3         50    10    12          12    11 11 10 12 0
20120103 0        3         50    10    12          -2    -4 -2 -10 10 0
20120103 6        3         50    10    12          0     3  2 2 4 0
20120103 12       3         50    10    12          3     9  8 7 2 0
