unixtime   leadtime location  lat   lon   altitude  obs   fcst
1325376000 0        3         50    10    12    1     6
1325376000 3        3         50    10    12    2     6
1325462400 0        3         50    10    12    3     7
-999       3        3         50    10    12    4     6
-999       0        3         50    10    12    5     7
1325548800 3        3         50    10    12    6     7
