0 0 NO ICING
1 1 LIGHT ICING
2 2 LIGHT ICING IN CLOUD
3 3 LIGHT ICING IN PRECIPITATION
4 4 MODERATE ICING
5 5 MODERATE ICING IN CLOUD
6 6 MODERATE ICING IN PRECIPITATION
7 7 SEVERE ICING
8 8 SEVERE ICING IN CLOUD
9 9 SEVERE ICING IN PRECIPITATION
15 15 MISSING VALUE
